ListBox WPF Multiselect Not working - c#

I am trying to select multiple options from a listbox. I even tried using Multiple Selection mode but it doesnot work for this specific listbox but works for others. ListBox name is listBox. I am adding the data to that list dynamically in OrderWindow class and i have implemented the selection_changed method but i am unable to select multiple items and i have also binded a list to this listbox.
Here is the code:
namespace ACW2
{
/// <summary>
/// Interaction logic for OrderWindow.xaml
/// </summary>
public partial class OrderWindow : Window
{
List<MenuClass> PizzaInStock = new List<MenuClass>();
List<InvClass> inventory = MainWindow.ItemList;
List<InvClass> pizzatoppings = new List<InvClass>();
List<String> Mainlist = new List<String>();
String addpizzas = "";
double pizzaprice = 0;
private void extratoppingslist(String name)
{
pizzatoppings = new List<InvClass>();
var pizza = MainWindow.MenuList.FirstOrDefault(x => x.Name == name);
List<Ingredient> originaltoppings = pizza.Ingredients;
int originaltoppingsize = pizza.Ingredients.Count;
if (originaltoppingsize >= 5)
{
return;
}
var allpizzatoppings = from a in inventory
where a.Category == "pizza"
select a;
foreach (InvClass item in allpizzatoppings)
{
int exists = 0;
if (originaltoppingsize == 5)
{
break;
}
foreach(Ingredient ing in originaltoppings)
{
if (item.Name.Equals(ing.Name))
{
exists = 1;
break;
}
}
if (exists == 0)
{
pizzatoppings.Add(item);
}
++originaltoppingsize;
}
listBox.ItemsSource = null;
listBox.ItemsSource = pizzatoppings;
}
private void updatepizzaprice()
{
pizzaprice = 0;
if (comboBox1.SelectedItem != null&& comboBox.SelectedItem != null)
{
String pizza = comboBox.SelectedItem.ToString();
String size = comboBox1.SelectedItem.ToString();
extratoppingslist(pizza);
var iteminlists = MainWindow.MenuList.FirstOrDefault(x => (x.Name == pizza) && (x.Size == size));
pizzaprice += (Convert.ToDouble(iteminlists.Price));
List<Ingredient> list = iteminlists.Ingredients;
if (checkBox.IsChecked == true)
{
foreach(Ingredient iss in list)
{
Trace.WriteLine(iss.Name);
}
var item = list.FirstOrDefault(x => x.Name == " dough");
var ingr= inventory.FirstOrDefault(x => x.Name == " dough");
pizzaprice += ((Convert.ToDouble(item.Quantity) * 0.1))*ingr.Price;
var items = list.FirstOrDefault(x => x.Name == " mozzarella");
var ingrs = inventory.FirstOrDefault(x => x.Name == " mozzarella");
pizzaprice += ((Convert.ToDouble(items.Quantity) * 0.15)) * ingrs.Price;
}
List<InvClass> toppings = listBox.SelectedItems.Cast<InvClass>().ToList();
foreach (InvClass top in toppings)
{
var item = inventory.FirstOrDefault(x => x.Name == top.Name);
Trace.WriteLine(top.Name);
if (iteminlists.Size == " regular")
{
pizzaprice += item.Price * 0.25;
}
else if (iteminlists.Size == " large")
{
pizzaprice += item.Price * 0.35;
}
else if (iteminlists.Size == " extra-large")
{
pizzaprice += item.Price * 0.75;
}
}
textBox.Text = "£ " + pizzaprice.ToString();
}
}
private void comboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
updatepizzaprice();
}
private void comboBox1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
updatepizzaprice();
}
private void checkBox_Checked(object sender, RoutedEventArgs e)
{
updatepizzaprice();
}
private void listBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
updatepizzaprice();
}
private void checkBox_unchecked(object sender, RoutedEventArgs e)
{
updatepizzaprice();
}
private void checkbox1_unchecked(object sender, RoutedEventArgs e)
{
updateburgerprice();
}
private void checkbox2_unchecked(object sender, RoutedEventArgs e)
{
updateburgerprice();
}
}
}
Here is the xml code:
<Window x:Class="ACW2.OrderWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:ACW2"
mc:Ignorable="d"
Title="OrderWindow" SizeToContent="WidthAndHeight">
<StackPanel Orientation="Vertical">
<Label x:Name="label10" Content="Create Order" HorizontalAlignment="Left" Margin="5" VerticalAlignment="Top" FontSize="24"/>
<StackPanel Orientation="Horizontal" VerticalAlignment="Top">
<StackPanel Orientation="Vertical" VerticalAlignment="Top">
<Label x:Name="label4_Copy" Content="Order Summary" Margin="5" FontSize="16"/>
<ListBox x:Name="listBox2" Height="160" Margin="5" MinWidth="180"/>
<Button x:Name="button4" Content="Remove Item" Margin="5" Width="75"/>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
<Label x:Name="label13" Content="Ingredient Cost (£)" Margin="5" VerticalAlignment="Top"/>
<TextBox x:Name="textBox4" Height="24" Margin="5" TextWrapping="Wrap" Text="£" Width="80"/>
</StackPanel>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
<Label x:Name="label12" Content="Net Profit (£)" Margin="5"/>
<TextBox x:Name="textBox5" Height="24" Margin="5" TextWrapping="Wrap" Text="£" Width="80"/>
</StackPanel>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
<Label x:Name="label11" Content="Total Price(£)" Margin="5"/>
<TextBox x:Name="textBox1" Height="24" Margin="5" TextWrapping="Wrap" Text="£" Width="80"/>
</StackPanel>
<Button x:Name="button3" Content="Complete Order" Margin="5"/>
</StackPanel>
<StackPanel Orientation="Vertical" VerticalAlignment="Top">
<Label x:Name="label4" Content="1. Pizzas" Margin="5" FontSize="16"/>
<Border BorderBrush="Gray" BorderThickness="1" Margin="5">
<StackPanel Orientation="Vertical">
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
<Label x:Name="label1" Content="Pizza" Margin="5" />
<ComboBox x:Name="comboBox" Margin="5" Width="120" SelectionChanged="comboBox_SelectionChanged"/>
</StackPanel>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
<Label x:Name="label" Content="Size" Margin="5"/>
<ComboBox x:Name="comboBox1" Margin="5" Width="120" SelectionChanged="comboBox1_SelectionChanged"/>
</StackPanel>
<CheckBox x:Name="checkBox" Content="Stuffed Crust" Margin="5" HorizontalAlignment="Center" Checked="checkBox_Checked" Unchecked="checkBox_unchecked"/>
<Label x:Name="label14" Content="Extra Toppings" Margin="5,5,5,0" HorizontalAlignment="Center"/>
<ListBox x:Name="listBox" Height="120" Margin="5,0,5,5" MinWidth="140" HorizontalAlignment="Center" SelectionChanged="listBox_SelectionChanged" SelectionMode="Multiple">
<ListBox.ItemTemplate>
<DataTemplate x:Name="Lists">
<TextBlock>
<Run Text="{Binding Name}"/>
<Run Text=" , "/>
<Run Text="{Binding Price}"/>
</TextBlock>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
<Label x:Name="label9" Content="Price (£)" Margin="5"/>
<TextBox x:Name="textBox" Height="24" Margin="5" TextWrapping="Wrap" Text="£" VerticalAlignment="Top" Width="80"/>
</StackPanel>
<Button x:Name="button" Content="Add to Order" Margin="5" Width="80" HorizontalAlignment="Right"/>
</StackPanel>
</Border>
</StackPanel>
<StackPanel Orientation="Vertical" VerticalAlignment="Top">
<Label x:Name="label5" Content="2. Burgers" Margin="5" FontSize="16"/>
<Border BorderBrush="Gray" BorderThickness="1" Margin="5">
<StackPanel Orientation="Vertical">
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
<Label x:Name="label2" Content="Burger" HorizontalAlignment="Left" Margin="5" VerticalAlignment="Top"/>
<ComboBox x:Name="comboBox2" HorizontalAlignment="Left" Margin="5" VerticalAlignment="Top" Width="107" SelectionChanged="comboBox2_SelectionChanged"/>
</StackPanel>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
<Label x:Name="label3" Content="Size" Margin="5" VerticalAlignment="Center"/>
<RadioButton x:Name="radioButton" Content="1/4lb" HorizontalAlignment="Left" Margin="5" VerticalAlignment="Center" Checked="radioButton_Checked"/>
<RadioButton x:Name="radioButton1" Content="1/2lb" HorizontalAlignment="Left" Margin="5" VerticalAlignment="Center" Checked="radioButton1_Checked"/>
</StackPanel>
<StackPanel Orientation="Vertical" HorizontalAlignment="Center">
<CheckBox x:Name="checkBox1" Content="Salad" Margin="2" Checked="checkBox1_Checked" Unchecked="checkbox1_unchecked"/>
<CheckBox x:Name="checkBox2" Content="Cheese" Margin="2" Checked="checkBox2_Checked" Unchecked="checkbox2_unchecked"/>
</StackPanel>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
<Label x:Name="label8" Content="Price (£)" HorizontalAlignment="Left" Margin="5" />
<TextBox x:Name="textBox2" Height="24" Margin="5" TextWrapping="Wrap" Text="£" Width="80"/>
</StackPanel>
<Button x:Name="button1" Content="Add to Order" Margin="5" Width="80" HorizontalAlignment="Right" Click="button1_Click"/>
</StackPanel>
</Border>
</StackPanel>
<StackPanel Orientation="Vertical" VerticalAlignment="Top">
<Label x:Name="label6" Content="3. Sundries" Margin="5" FontSize="16"/>
<Border BorderBrush="Gray" BorderThickness="1" Margin="5">
<StackPanel Orientation="Vertical">
<ListBox x:Name="listBox1" Height="120" MinWidth="140" Margin="5" SelectionChanged="listBox1_SelectionChanged">
<ListBox.ItemTemplate>
<DataTemplate x:Name="Lists11">
<TextBlock Background="{Binding Color}">
<Run Text="{Binding Name}"/>
</TextBlock>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<StackPanel Orientation="Horizontal">
<Label x:Name="label7" Content="Price (£)" Margin="5" VerticalAlignment="Top"/>
<TextBox x:Name="textBox3" Height="24" Margin="5" TextWrapping="Wrap" Text="£" Width="80"/>
</StackPanel>
<Button x:Name="button2" Content="Add to Order" HorizontalAlignment="Right" Margin="5" Width="80" Click="button2_Click"/>
</StackPanel>
</Border>
</StackPanel>
</StackPanel>
</StackPanel>
</Window>

Related

Binding in UWP (c#)

I have listview with binding:
<ListView x:Name="OrdersListView" IsItemClickEnabled="True" SelectionMode="Single"
ItemClick="OrdersListView_ItemClick" SelectedItem="{Binding AllRoundsSelectedItem, Mode=TwoWay}">
I need to click element and receive data.
I do it like this.
public RootObject allRoundsSelectedItem;
public RootObject AllRoundsSelectedItem
{
get { return allRoundsSelectedItem; }
set { allRoundsSelectedItem = value; OnPropertyChanged();}
}
private void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
var handler = PropertyChanged;
handler?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
private void OrdersListView_ItemClick(object sender, ItemClickEventArgs e)
{
}
When i set breakpoint on this row set { allRoundsSelectedItem = value; OnPropertyChanged();}
I see that I have value that I need to have.
I try to enter data in another ListView.
Here code for it:
<ScrollViewer HorizontalAlignment="Left" Height="667" Margin="415,54,-124,-1" VerticalAlignment="Top" Width="989">
<ListView x:Name="DetailsListView" ItemsSource="{Binding AllRoundsSelectedItem}">
<ListView.ItemTemplate>
<DataTemplate>
<StackPanel Height="667" Width="989">
<Grid x:Name="DetailGrid" Height="667" Width="989" VerticalAlignment="Top" >
<Grid HorizontalAlignment="Left" Height="44" VerticalAlignment="Top" Width="989" BorderBrush="#FFFBF8F8" BorderThickness="0,0,1,1">
<TextBlock x:Name="textBlock1" HorizontalAlignment="Left" TextWrapping="Wrap" Text="Время и дата заказа" VerticalAlignment="Top" Height="44" Width="214" FontSize="23"/>
<TextBlock x:Name="textBlock2" HorizontalAlignment="Left" Margin="500,0,0,0" TextWrapping="Wrap" Text="{Binding date_created}" VerticalAlignment="Top" Height="44" Width="360"/>
</Grid>
<Grid HorizontalAlignment="Left" Height="44" Margin="0,44,0,0" VerticalAlignment="Top" Width="989" BorderBrush="#FFFBF8F8" BorderThickness="0,0,1,1">
<TextBlock x:Name="textBlock3" HorizontalAlignment="Left" TextWrapping="Wrap" Text="Статус" VerticalAlignment="Top" Height="44" Width="360" FontSize="23"/>
<TextBlock x:Name="textBlock4" HorizontalAlignment="Left" Margin="500,0,0,0" TextWrapping="Wrap" Text="{Binding status }" VerticalAlignment="Top" Height="44" Width="360"/>
</Grid>
<Grid HorizontalAlignment="Left" Height="44" Margin="0,88,0,0" VerticalAlignment="Top" Width="989" BorderBrush="#FFFBF8F8" BorderThickness="0,0,1,1">
<TextBlock x:Name="textBlock5" HorizontalAlignment="Left" TextWrapping="Wrap" Text="Осталось времени" VerticalAlignment="Top" Height="44" Width="360" FontSize="23"/>
<TextBlock x:Name="textBlock6" HorizontalAlignment="Left" Margin="500,0,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Height="44" Width="360"/>
</Grid>
<Grid HorizontalAlignment="Left" Height="44" Margin="0,132,0,0" VerticalAlignment="Top" Width="989" BorderBrush="#FFFBF8F8" BorderThickness="0,0,1,1">
<TextBlock x:Name="textBlock7" HorizontalAlignment="Left" TextWrapping="Wrap" Text="На когда" VerticalAlignment="Top" Height="44" Width="360" FontSize="23"/>
<TextBlock x:Name="textBlock8" HorizontalAlignment="Left" Margin="500,0,0,0" TextWrapping="Wrap" Text="{Binding billing.city}" VerticalAlignment="Top" Height="44" Width="360"/>
</Grid>
<Grid HorizontalAlignment="Left" Height="44" Margin="0,176,0,0" VerticalAlignment="Top" Width="989" BorderBrush="#FFFBF8F8" BorderThickness="0,0,1,1">
<TextBlock x:Name="textBlock9" HorizontalAlignment="Left" TextWrapping="Wrap" Text="Сумма" VerticalAlignment="Top" Height="44" Width="360" FontSize="23"/>
<TextBlock x:Name="textBlock10" HorizontalAlignment="Left" Margin="500,0,0,0" TextWrapping="Wrap" Text="{Binding total}" VerticalAlignment="Top" Height="44" Width="360"/>
</Grid>
<Grid HorizontalAlignment="Left" Height="44" Margin="0,220,0,0" VerticalAlignment="Top" Width="989" BorderBrush="#FFFBF8F8" BorderThickness="0,0,1,1">
<TextBlock x:Name="textBlock11" HorizontalAlignment="Left" TextWrapping="Wrap" Text="Имя" VerticalAlignment="Top" Height="44" Width="360" FontSize="23"/>
<TextBlock x:Name="textBlock12" HorizontalAlignment="Left" Margin="500,0,0,0" TextWrapping="Wrap" Text="{Binding billing.first_name}" VerticalAlignment="Top" Height="44" Width="360"/>
</Grid>
<Grid HorizontalAlignment="Left" Height="44" Margin="0,264,0,0" VerticalAlignment="Top" Width="989" BorderBrush="#FFFBF8F8" BorderThickness="0,0,1,1">
<TextBlock x:Name="textBlock13" HorizontalAlignment="Left" TextWrapping="Wrap" Text="Телефон" VerticalAlignment="Top" Height="44" Width="360" FontSize="23"/>
<TextBlock x:Name="textBlock14" HorizontalAlignment="Left" Margin="500,0,0,0" TextWrapping="Wrap" Text="{Binding billing.phone}" VerticalAlignment="Top" Height="44" Width="360"/>
</Grid>
<Grid HorizontalAlignment="Left" Height="44" Margin="0,308,0,0" VerticalAlignment="Top" Width="989" BorderBrush="#FFFBF8F8" BorderThickness="0,0,1,1">
<TextBlock x:Name="textBlock15" HorizontalAlignment="Left" TextWrapping="Wrap" Text="Адрес" VerticalAlignment="Top" Height="44" Width="360" FontSize="23"/>
<TextBlock x:Name="textBlock16" HorizontalAlignment="Left" Margin="500,0,0,0" TextWrapping="Wrap" Text="{Binding billing.address_1}" VerticalAlignment="Top" Height="44" Width="360"/>
</Grid>
<Grid HorizontalAlignment="Left" Height="44" Margin="0,352,0,0" VerticalAlignment="Top" Width="989" BorderBrush="#FFFBF8F8" BorderThickness="0,0,1,1">
<TextBlock x:Name="textBlock17" HorizontalAlignment="Left" TextWrapping="Wrap" Text="Количество персон" VerticalAlignment="Top" Height="44" Width="360" FontSize="23"/>
<TextBlock x:Name="textBlock18" HorizontalAlignment="Left" Margin="500,0,0,0" TextWrapping="Wrap" Text="{Binding billing.postcode}" VerticalAlignment="Top" Height="44" Width="360"/>
</Grid>
<Grid HorizontalAlignment="Left" Height="44" Margin="0,396,0,0" VerticalAlignment="Top" Width="989" BorderBrush="#FFFBF8F8" BorderThickness="0,0,1,1">
<TextBlock x:Name="textBlock19" HorizontalAlignment="Left" TextWrapping="Wrap" Text="Откуда" VerticalAlignment="Top" Height="44" Width="360" FontSize="23"/>
<TextBlock x:Name="textBlock20" HorizontalAlignment="Left" Margin="500,0,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Height="44" Width="360"/>
</Grid>
<Grid HorizontalAlignment="Left" Height="44" Margin="0,440,0,0" VerticalAlignment="Top" Width="989" BorderBrush="#FFFBF8F8" BorderThickness="0,0,1,1">
<TextBlock x:Name="textBlock21" HorizontalAlignment="Left" TextWrapping="Wrap" Text="Состав заказа" VerticalAlignment="Top" Height="44" Width="360" FontSize="23"/>
<TextBlock x:Name="textBlock22" HorizontalAlignment="Left" Margin="500,0,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Height="44" Width="360"/>
</Grid>
<Grid HorizontalAlignment="Left" Height="44" Margin="0,484,0,0" VerticalAlignment="Top" Width="989" BorderBrush="#FFFBF8F8" BorderThickness="0,0,1,1">
<TextBlock x:Name="textBlock23" HorizontalAlignment="Left" TextWrapping="Wrap" Text="Приметка для кухни" VerticalAlignment="Top" Height="44" Width="360" FontSize="23"/>
<TextBlock x:Name="textBlock24" HorizontalAlignment="Left" Margin="500,0,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Height="44" Width="360"/>
</Grid>
<Grid HorizontalAlignment="Left" Height="44" Margin="0,528,0,0" VerticalAlignment="Top" Width="989" BorderBrush="#FFFBF8F8" BorderThickness="0,0,1,1">
<TextBlock x:Name="textBlock25" HorizontalAlignment="Left" TextWrapping="Wrap" Text="Приметка для курьера" VerticalAlignment="Top" Height="44" Width="360" FontSize="23"/>
<TextBlock x:Name="textBlock26" HorizontalAlignment="Left" Margin="500,0,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Height="44" Width="360"/>
</Grid>
</Grid>
</StackPanel></DataTemplate></ListView.ItemTemplate></ListView>
But anything shows.
Where is my trouble?
Thank's for help so much!

Your question wasn't very clear, so I can only guess as to what you were trying to achieve. It looks as though you want some kind of master-detail interface, wherein you choose an item from the list (master) and then another form displays with controls for editing the data for that item (detail).
Your first ListView looks fine (and the binding works as you said). But why are you using another ListView for displaying the details of the selected item? ListViews are for displaying lists of data, but it appears that RootObject is not an array or collection class (I could be wrong, I don't know the class definition). You probably shouldn't be using a ListView, but whatever you use, you should bind the AllRoundsSelectedItem to the DataSource property of the panel.

Solution 1: I mostly agree with #Decade Moon, but for the last line, there is no DataSource property of the StackPanel you used, I think this maybe is a typo, it should be DataContext. Anyway, here I'm writing this answer to give a demo for this solution:
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<ListView x:Name="OrdersListView" IsItemClickEnabled="True" SelectionMode="Single"
ItemClick="OrdersListView_ItemClick" SelectedItem="{Binding AllRoundsSelectedItem, Mode=TwoWay}">
<ListView.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding ItemName}" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<ScrollViewer Grid.Column="1">
<StackPanel x:Name="Detail" Grid.Column="1" >
<TextBlock Text="{Binding ItemName}" FontSize="30" Foreground="Red" />
<TextBlock Text="{Binding Paramether1}" Margin="0,15" FontSize="20" />
<TextBlock Text="{Binding Paramether2}" FontSize="20" />
<TextBlock Text="{Binding Paramether3}" Margin="0,15" FontSize="20" />
<TextBlock Text="{Binding Paramether4}" FontSize="20" />
<TextBlock Text="{Binding Paramether5}" Margin="0,15" FontSize="20" />
</StackPanel>
</ScrollViewer>
</Grid>
If your layout is like this, then you can keep your most of the code in behind and in the OrdersListView_ItemClick event code like this:
private void OrdersListView_ItemClick(object sender, ItemClickEventArgs e)
{
AllRoundsSelectedItem = e.ClickedItem as RootObject;
Detail.DataContext = AllRoundsSelectedItem;
}
Solution 2: if you still want to use a ListView to show the details so can they be selected or something else, you can for example code like this:
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<ListView x:Name="OrdersListView" IsItemClickEnabled="True" SelectionMode="Single"
ItemClick="OrdersListView_ItemClick" SelectedItem="{Binding AllRoundsSelectedItem, Mode=TwoWay}">
<ListView.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding ItemName}" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<ListView x:Name="DetailsListView" ItemsSource="{Binding AllRoundsSelectedItem}" Grid.Column="1">
<ListView.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding}" FontSize="20" />
</StackPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</Grid>
And the type of AllRoundsSelectedItem should be List or OberservableCollection, it means you need to modify your code behind for example like this:
public sealed partial class MainPage : Page, INotifyPropertyChanged
{
public MainPage ()
{
this.InitializeComponent();
this.DataContext = this;
}
private ObservableCollection<RootObject> collection = new ObservableCollection<RootObject>();
protected override void OnNavigatedTo(NavigationEventArgs e)
{
for (int i = 0; i < 100; i++)
{
collection.Add(new RootObject
{
ItemName = "Item " + i,
Paramether1 = "Paramether1 " + i,
Paramether2 = "Paramether2 " + i,
Paramether3 = "Paramether3 " + i,
Paramether4 = "Paramether4 " + i,
Paramether5 = "Paramether5 " + i,
});
}
OrdersListView.ItemsSource = collection;
}
public ObservableCollection<string> allRoundsSelectedItem;
public event PropertyChangedEventHandler PropertyChanged;
public ObservableCollection<string> AllRoundsSelectedItem
{
get { return allRoundsSelectedItem; }
set
{
allRoundsSelectedItem = value;
OnPropertyChanged();
}
}
private void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
var handler = PropertyChanged;
handler?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
private void OrdersListView_ItemClick(object sender, ItemClickEventArgs e)
{
var item = e.ClickedItem as RootObject;
AllRoundsSelectedItem = new ObservableCollection<string>
{
item.ItemName,item.Paramether1,
item.Paramether2, item.Paramether3,
item.Paramether4, item.Paramether5,
};
}
}
By my side the RootObject class is like this:
public class RootObject
{
public string ItemName { get; set; }
public string Paramether1 { get; set; }
public string Paramether2 { get; set; }
public string Paramether3 { get; set; }
public string Paramether4 { get; set; }
public string Paramether5 { get; set; }
}
There are maybe other solutions, but you will need either modify your xaml code or the data type of your AllRoundsSelectedItem.

ListView XAML show items multiple times c#

I'm working on a WIN 8.1 App. In my App I have a ListView where I'm binding a observable collection from a ViewModel. So far everything works fine. The Problem is, that in the Background all the Data will be loaded correctly, but my ListView displays after approximately 40 elements, from the beginning... In the Background the right Object is selected and 80 Objects are loaded.
Could it be a Problem with the Scrolling?
Does anyone know, how to solve this issue?
From an other Page, i navigate to the Page with the ListView:
private void ShowReturnData()
{
ReturnViewModel retVM = new ReturnViewModel(_navigationService, SelectedTour);
_navigationService.NavigateTo(ViewModelLocator.ReturnPageKey, retVM);
}
In my ViewModel Constructor, I add my data to the observable Collection:
I'm working with MVVMlight.
Properties (ObservableCollection, SelectedItem):
--> observable Collection
/// <summary>
/// The <see cref="Data" /> property's name.
/// </summary>
public const string DataPropertyName = "Data";
private ObservableCollection<ReturnData> _myProperty = new ObservableCollection<ReturnData>();
/// <summary>
/// Sets and gets the Data property.
/// Changes to that property's value raise the PropertyChanged event.
/// </summary>
public ObservableCollection<ReturnData> Data
{
get
{
return _myProperty;
}
set
{
if (_myProperty == value)
{
return;
}
_myProperty = value;
RaisePropertyChanged(DataPropertyName);
}
}
--> SelectedItem
/// <summary>
/// The <see cref="SelectedItem" /> property's name.
/// </summary>
public const string SelectedItemPropertyName = "SelectedItem";
private ReturnData _selectedItem = null;
/// <summary>
/// Sets and gets the SelectedTour property.
/// Changes to that property's value raise the PropertyChanged event.
/// </summary>
public ReturnData SelectedItem
{
get
{
return _selectedItem;
}
set
{
if (_selectedItem == value)
{
return;
}
if (_selectedItem != null)
{
_selectedItem.IsFirstItem = false;
_selectedItem.IsLastItem = false;
}
_selectedItem = value;
if (_selectedItem != null)
{
setIsFirstOrLastItem(Data.IndexOf(_selectedItem));
}
RaisePropertyChanged(SelectedItemPropertyName);
}
}
ViewModel Constructor:
public ReturnViewModel(INavigationService navigationService, TourDetailData tourDetails)
{
//Services
_navigationService = navigationService;
//Commands
PrevPageCommand = new RelayCommand(GoToPrevPage);
TourDetails = tourDetails;
TourCustomerName = "Tour " + tourDetails.Tour + " > " + tourDetails.AccountName;
Data = new ObservableCollection<ReturnData>(from i in TourDetails.ReturnData orderby Convert.ToInt32(i.ItemId) select i);
}
XAML:
<ListView x:Name="lvItems"
Grid.Row="2"
SelectedItem="{Binding SelectedItem, Mode=TwoWay}"
ItemTemplate="{StaticResource ReturnDataTemplate}"
ItemContainerStyle="{StaticResource ReturnDataListViewItemStyle}"
ItemsSource="{Binding Data}"
Margin="0,5,0,0"
Loaded="lvItems_Loaded">
</ListView>
DataTemplate:
<DataTemplate x:Key="ReturnDataTemplate">
<Grid x:Name="grid" d:DesignWidth="1344.53" d:DesignHeight="123.228">
<Grid.Resources>
<converter:SelectionConverter x:Key="SelectionConverter" Context="{Binding}" />
</Grid.Resources>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="20"/>
<ColumnDefinition Width="450*"/>
<ColumnDefinition Width="100"/>
<ColumnDefinition Width="100"/>
<ColumnDefinition Width="100"/>
</Grid.ColumnDefinitions>
<Rectangle Grid.Row="0" Grid.ColumnSpan="5" Height="100" Fill="LightGray" Visibility="Collapsed"/>
<Rectangle Grid.Row="2" Grid.ColumnSpan="5" Height="100" Fill="LightGray" Visibility="Collapsed"/>
<!--<Rectangle Grid.Row="0" Grid.ColumnSpan="5" Height="100" Fill="LightGray" Visibility="{Binding IsFirstItem, Converter={StaticResource BoolToVisibilityConverter}}"/>
<Rectangle Grid.Row="2" Grid.ColumnSpan="5" Height="100" Fill="LightGray" Visibility="{Binding IsLastItem, Converter={StaticResource BoolToVisibilityConverter}}"/>-->
<Rectangle Grid.Row="1" Fill="{StaticResource OrangeHighlight}" Visibility="{Binding IsDirty, Converter={StaticResource BoolToVisibilityConverter}}"/>
<StackPanel Grid.Row="1" Grid.Column="1" VerticalAlignment="Center" Margin="15,0">
<TextBlock TextWrapping="Wrap" FontSize="42.667" FontFamily="Segoe UI" Text="{Binding ItemId}" FontWeight="SemiBold"/>
<TextBlock TextWrapping="Wrap" Text="{Binding ItemName}" FontSize="32" FontFamily="Segoe UI"/>
</StackPanel>
<!--<TextBox x:Name="tbxReturn" Grid.Row="1" TextWrapping="Wrap" Grid.Column="2" FontFamily="Segoe UI" FontSize="42.667" Text="{Binding Return}" HorizontalAlignment="Center" VerticalAlignment="Center" Style="{StaticResource TextBoxStyleValues}" PreventKeyboardDisplayOnProgrammaticFocus="True" DoubleTapped="tbxReturn_DoubleTapped" GotFocus="tbxReturn_GotFocus" />-->
<TextBox x:Name="tbxReturn" Grid.Row="1" TextWrapping="Wrap" Grid.Column="2" FontFamily="Segoe UI" FontSize="42.667" Text="{Binding Return}" HorizontalAlignment="Center" VerticalAlignment="Center" Style="{StaticResource TextBoxStyleValues}" DoubleTapped="tbxReturn_DoubleTapped" GotFocus="tbxReturn_GotFocus" InputScope="CurrencyAmountAndSymbol" Foreground="#FF520164" />
<TextBox x:Name="tbxMold" Grid.Row="1" TextWrapping="Wrap" Text="{Binding Mildew}" Grid.Column="3" FontFamily="Segoe UI" FontSize="42.667" HorizontalAlignment="Center" VerticalAlignment="Center" Style="{StaticResource TextBoxStyleValues}" DoubleTapped="tbxMold_DoubleTapped" Tapped="tbxMold_Tapped" GotFocus="tbxMold_GotFocus" InputScope="CurrencyAmountAndSymbol" Foreground="#FF019E90" />
<TextBox x:Name="tbxCredit" Grid.Row="1" TextWrapping="Wrap" Text="{Binding Credit}" Grid.Column="4" FontFamily="Segoe UI" FontSize="42.667" HorizontalAlignment="Center" VerticalAlignment="Center" Style="{StaticResource TextBoxStyleValues}" DoubleTapped="tbxCredit_DoubleTapped" Tapped="tbxCredit_Tapped" GotFocus="tbxCredit_GotFocus" InputScope="CurrencyAmountAndSymbol" Foreground="#FF005C9C" />
<!--<Button Grid.Row="1" Content="+" HorizontalAlignment="Stretch" VerticalAlignment="Top" Grid.Column="2" Height="100" Margin="0,-100,0,0" FontSize="48" Style="{StaticResource NumUpDownButtonStyle}" Visibility="{Binding ElementName=lvItems, Path=DataContext.SelectedItem, ConverterParameter=Selected, Converter={StaticResource SelectionConverter}}" Command="{Binding DataContext.IncreaseReturnCommand, ElementName=lvItems}" Opacity="0.9"/>
<Button Grid.Row="1" Content="-" HorizontalAlignment="Stretch" VerticalAlignment="Bottom" Grid.Column="2" Margin="0,0,0,-100" Height="100" FontSize="48" Style="{StaticResource NumUpDownButtonStyle}" Visibility="{Binding ElementName=lvItems, Path=DataContext.SelectedItem, ConverterParameter=Selected, Converter={StaticResource SelectionConverter}}" Command="{Binding DataContext.DecreaseReturnCommand, ElementName=lvItems}" Opacity="0.9"/>
<Button Grid.Row="1" Content="+" HorizontalAlignment="Stretch" VerticalAlignment="Top" Grid.Column="3" Height="100" Margin="0,-100,0,0" FontSize="48" Style="{StaticResource NumUpDownButtonStyle}" Visibility="{Binding ElementName=lvItems, Path=DataContext.SelectedItem, ConverterParameter=Selected, Converter={StaticResource SelectionConverter}}" Command="{Binding DataContext.IncreaseMildewCommand, ElementName=lvItems}" Opacity="0.9"/>
<Button Grid.Row="1" Content="-" HorizontalAlignment="Stretch" VerticalAlignment="Bottom" Grid.Column="3" Margin="0,0,0,-100" Height="100" FontSize="48" Style="{StaticResource NumUpDownButtonStyle}" Visibility="{Binding ElementName=lvItems, Path=DataContext.SelectedItem, ConverterParameter=Selected, Converter={StaticResource SelectionConverter}}" Command="{Binding DataContext.DecreaseMildewCommand, ElementName=lvItems}" Opacity="0.9"/>
<Button Grid.Row="1" Content="+" HorizontalAlignment="Stretch" VerticalAlignment="Top" Grid.Column="4" Height="100" Margin="0,-100,0,0" FontSize="48" Style="{StaticResource NumUpDownButtonStyle}" Visibility="{Binding ElementName=lvItems, Path=DataContext.SelectedItem, ConverterParameter=Selected, Converter={StaticResource SelectionConverter}}" Command="{Binding DataContext.IncreaseCreditCommand, ElementName=lvItems}" Opacity="0.9"/>
<Button Grid.Row="1" Content="-" HorizontalAlignment="Stretch" VerticalAlignment="Bottom" Grid.Column="4" Margin="0,0,0,-100" Height="100" FontSize="48" Style="{StaticResource NumUpDownButtonStyle}" Visibility="{Binding ElementName=lvItems, Path=DataContext.SelectedItem, ConverterParameter=Selected, Converter={StaticResource SelectionConverter}}" Command="{Binding DataContext.DecreaseCreditCommand, ElementName=lvItems}" Opacity="0.9"/>-->
</Grid>
</DataTemplate>
Style:
<Style x:Key="ReturnDataListViewItemStyle" TargetType="ListViewItem">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListViewItem">
<ListViewItemPresenter x:Name="listViewItemPresenter" d:DesignWidth="938.908" d:DesignHeight="103.083"
ContentMargin="0"
DragOpacity="{ThemeResource ListViewItemDragThemeOpacity}"
DisabledOpacity="{ThemeResource ListViewItemDisabledThemeOpacity}"
HorizontalContentAlignment="Stretch"
Padding="0"
PointerOverBackgroundMargin="1"
ReorderHintOffset="{ThemeResource ListViewItemReorderHintThemeOffset}"
SelectionCheckMarkVisualEnabled="False"
SelectedBorderThickness="0"
VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
Margin="15,0,0,0"
SelectedForeground="Black"
SelectedPointerOverBackground="{StaticResource OrangeBackground}"
SelectedPointerOverBorderBrush="{StaticResource OrangeBackground}"
SelectedBackground="{StaticResource OrangeBackground}"
DataContext="{Binding SelectedItem}"
Content="{Binding Mode=OneWay}"
ContentTransitions="{TemplateBinding ContentTransitions}"
PlaceholderBackground="{StaticResource BackgroundGray}">
</ListViewItemPresenter>
</ControlTemplate>
</Setter.Value>
</Setter>
<!--<Setter Property="ContentTemplate" Value="{StaticResource ReturnDataTemplate}"/>-->
</Style>
In the Code behind of the XAML Page, I added the behavior of the ScrollViewer:
private void lvItems_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
SetScrollViewer();
}
private async void SetScrollViewer()
{
if (lvItems.SelectedItem == null)
return;
var item = lvItems.SelectedItem;
var listViewItem = (FrameworkElement)lvItems.ContainerFromItem(item);
if (listViewItem == null)
{
lvItems.ScrollIntoView(item);
}
while (listViewItem == null)
{
await Task.Delay(1);
listViewItem = (FrameworkElement)lvItems.ContainerFromItem(item);
}
var topLeft =
listViewItem
.TransformToVisual(lvItems)
.TransformPoint(new Point()).Y;
var lvih = listViewItem.ActualHeight;
var lvh = lvItems.ActualHeight;
var desiredTopLeft = (lvh - lvih) / 2.0;
var desiredDelta = topLeft - desiredTopLeft;
// Calculations relative to the ScrollViewer within the ListView
var scrollViewer = lvItems.GetFirstDescendantOfType<ScrollViewer>();
var currentOffset = scrollViewer.VerticalOffset;
var desiredOffset = currentOffset + desiredDelta;
//scrollViewer.ScrollToVerticalOffset(desiredOffset);
// better yet if building for Windows 8.1 to make the scrolling smoother use:
scrollViewer.ChangeView(null, desiredOffset, null);
}

ListBox SelectionChanged only once?

I have a ListBox which I add items to. Each time i select an item which is an object of a Person this person properties should be showed in textboxes. This person have person properties like age, name, sex and so on.
my listbox selection changed event only triggers one time or on new added items. It doesn't trigger when i click and an that is not just added.
Mainwindow.xaml.cs
namespace GUI_WPF_Eksamen
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
Backlog bl = new Backlog();
public MainWindow()
{
InitializeComponent();
DataContext = bl;
this.PriorityComboBox.Items.Add("High");
this.PriorityComboBox.Items.Add("Medium");
this.PriorityComboBox.Items.Add("Low");
}
private void AddToProductBackLogBtn_Click(object sender, RoutedEventArgs e)
{
this.ProductBacklogList.Items.Add(bl);
this.NameTextBox.Text = String.Empty;
}
private void ProductBacklogList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var item = this.ProductBacklogList.SelectedItem as Backlog;
this.NameLabel.Content = item.NAME;
this.DescriptionTextBlock.Text = item.DESCRIPTION;
this.PriorityLabel.Content = item.PRIORITY;
this.TimeLabel.Content = item.TIME;
}
private void AddToSprint_Click(object sender, RoutedEventArgs e)
{
var currentItem = this.ProductBacklogList.SelectedItem as Backlog;
this.SprintBacklogList.Items.Add(currentItem);
}
}
}
Mainwindow.xaml
<Window x:Class="GUI_WPF_Eksamen.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:GUI_WPF_Eksamen"
Title="GUI WPF application" Height="800" Width="1200">
<Window.Background>
<ImageBrush ImageSource="Images/chalkboard.jpg"/>
</Window.Background>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="69*"/>
<RowDefinition Height="700*"/>
</Grid.RowDefinitions>
<Label x:Name="Title" Content="SCRUM-BOARD XXL" HorizontalAlignment="Center" HorizontalContentAlignment="Center" Margin="15,10,5,0" VerticalAlignment="Top" Width="1172" Height="56" FontSize="36" FontStyle="Italic" FontWeight="Bold" Foreground="White"/>
<Grid HorizontalAlignment="Left" Height="680" Margin="15,10,0,0" Grid.Row="1" VerticalAlignment="Top" Width="354">
<Grid.RowDefinitions>
<RowDefinition Height="94*"/>
<RowDefinition Height="44*"/>
<RowDefinition Height="131*"/>
<RowDefinition Height="53*"/>
<RowDefinition Height="40*"/>
<RowDefinition Height="46*"/>
<RowDefinition Height="272*"/>
</Grid.RowDefinitions>
<Label Content="Navn" HorizontalAlignment="Left" Margin="0,44,0,0" VerticalAlignment="Top" Width="77" FontSize="16" Foreground="White"/>
<Label Content="Beskrivelse
" HorizontalAlignment="Left" Margin="0,10,0,0" VerticalAlignment="Top" Foreground="White" FontSize="16" Height="31" Grid.Row="1"/>
<Label Content="Prioritet" HorizontalAlignment="Left" Margin="0,7,0,0" VerticalAlignment="Top" Width="67" FontSize="16" Foreground="White" Grid.Row="3"/>
<Label Content="Estimeret tidsforbrug" HorizontalAlignment="Left" Margin="0,10,0,0" VerticalAlignment="Top" Foreground="White" FontSize="16" Grid.Row="4" Grid.RowSpan="2"/>
<TextBox x:Name="NameTextBox" HorizontalAlignment="Left" Height="23" Margin="51,52,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="303" Opacity="0.5" Text="{Binding Path=NAME}"/>
<ComboBox x:Name="PriorityComboBox" HorizontalAlignment="Left" Margin="73,12,0,0" VerticalAlignment="Top" Width="152" RenderTransformOrigin="0.5,0.5" Opacity="0.5" Grid.Row="3" SelectedItem="{Binding Path=PRIORITY}">
<ComboBox.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform Angle="0.036"/>
<TranslateTransform/>
</TransformGroup>
</ComboBox.RenderTransform>
</ComboBox>
<TextBox x:Name="TimeTextBox" HorizontalAlignment="Left" Height="23" Margin="0,6,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="204" Opacity="0.5" Grid.Row="5" Text="{Binding Path=TIME}"/>
<Label Content="time(r)" HorizontalAlignment="Left" Margin="209,38,0,0" VerticalAlignment="Top" Foreground="White" FontSize="16" Width="57" Grid.Row="4" Grid.RowSpan="2"/>
<TextBox x:Name="DescriptionTextBox" HorizontalAlignment="Left" Height="111" Margin="0,10,0,0" Grid.Row="2" TextWrapping="Wrap" VerticalAlignment="Top" Width="354" Opacity="0.5" Text="{Binding Path=DESCRIPTION}"/>
<Button x:Name="AddToProductBackLogBtn" Content="Add Backlog item" HorizontalAlignment="Left" Grid.Row="6" VerticalAlignment="Top" Width="200" Height="27" Margin="66,0,0,0" Background="White" Opacity="0.7" Click="AddToProductBackLogBtn_Click"/>
</Grid>
<Grid HorizontalAlignment="Left" Height="680" Margin="374,10,0,0" Grid.Row="1" VerticalAlignment="Top" Width="808" RenderTransformOrigin="0.459,0.431">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="79*"/>
<ColumnDefinition Width="47*"/>
<ColumnDefinition Width="76*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="209*"/>
<RowDefinition Height="131*"/>
</Grid.RowDefinitions>
<Label Content="Navn" HorizontalAlignment="Left" Margin="10,10,0,0" Grid.Row="1" VerticalAlignment="Top" FontSize="16" Foreground="White" Height="31" Width="47"/>
<Label Content="Beskrivelse" HorizontalAlignment="Left" Margin="10,55,0,0" Grid.Row="1" VerticalAlignment="Top" Foreground="White" FontSize="16" Height="31" Width="87"/>
<Label Content="Prioritet
" HorizontalAlignment="Left" Margin="10,10,0,0" Grid.Row="1" VerticalAlignment="Top" Foreground="White" FontSize="16" Height="32" Grid.Column="1" Width="66"/>
<Label Content="Estimeret tidsforbrug" Grid.Column="1" HorizontalAlignment="Left" Margin="10,55,0,0" Grid.Row="1" VerticalAlignment="Top" Foreground="White" FontSize="16" Height="31" Width="159"/>
<Label x:Name="PriorityLabel" Content="" Grid.Column="1" HorizontalAlignment="Left" Margin="90,10,0,0" Grid.Row="1" VerticalAlignment="Top" FontSize="16" Foreground="White" Width="79" Height="31"/>
<Label x:Name="TimeLabel" Grid.Column="2" HorizontalAlignment="Left" Margin="10,55,0,0" Grid.Row="1" VerticalAlignment="Top" Foreground="White" FontSize="16" Width="208" Height="31"/>
<ListBox x:Name="ProductBacklogList" HorizontalAlignment="Left" Height="353" Margin="10,55,0,0" VerticalAlignment="Top" Width="292" DisplayMemberPath="NAME" Opacity="0.505" SelectionChanged="ProductBacklogList_SelectionChanged" RenderTransformOrigin="0.5,0.5">
<ListBox.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform AngleY="-0.195"/>
<RotateTransform/>
<TranslateTransform Y="-0.497"/>
</TransformGroup>
</ListBox.RenderTransform>
</ListBox>
<ListBox x:Name="SprintBacklogList" HorizontalAlignment="Left" Height="353" Margin="10,55,0,0" VerticalAlignment="Top" Width="284" DisplayMemberPath="NAME" Grid.Column="2" Opacity="0.5"/>
<Label x:Name="NameLabel" HorizontalAlignment="Left" Margin="62,14,0,0" Grid.Row="1" VerticalAlignment="Top" Width="244" Height="27" Content="{Binding Path=NAME}" Foreground="White"/>
<Button x:Name="AddToSprint" Content="Add >>" Grid.Column="1" HorizontalAlignment="Left" Margin="54,201,0,0" VerticalAlignment="Top" Width="75" Height="20" Opacity="0.7" Click="AddToSprint_Click"/>
<TextBlock x:Name="DescriptionTextBlock" HorizontalAlignment="Left" Margin="10,86,0,0" Grid.Row="1" TextWrapping="Wrap" VerticalAlignment="Top" Height="166" Width="296" Foreground="White"/>
</Grid>
</Grid>

That way of selection changed can be accomplished easily:
Have a look here:
<Window x:Class="ListBoxSelection.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<DockPanel>
<ListBox ItemsSource="{Binding persons}" IsSynchronizedWithCurrentItem="True" DockPanel.Dock="Top">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Name}" Margin="5,0"/>
<TextBlock Text="{Binding Age, StringFormat=is {0} years old}" Margin="5,0"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<StackPanel Orientation="Horizontal" DataContext="{Binding persons}" DockPanel.Dock="Top">
<TextBlock Text="You have selected: " FontWeight="SemiBold"/>
<TextBox Text="{Binding Name, UpdateSourceTrigger=PropertyChanged}"
Margin="5,0"
FontWeight="SemiBold"
VerticalAlignment="Top"
HorizontalAlignment="Center"/>
<TextBox Text="{Binding Age, UpdateSourceTrigger=PropertyChanged}"
Margin="5,0"
FontWeight="SemiBold"
VerticalAlignment="Top"
HorizontalAlignment="Left"/>
</StackPanel>
<Button Content="Add Item" DockPanel.Dock="Top" Width="60" VerticalAlignment="Top" Margin="20" Click="btnAddItem_Click"/>
</DockPanel>
Note this down: IsSynchronizedWithCurrentItem="True"
From MSDN:
Gets or sets a value that indicates whether a Selector should keep the
SelectedItem synchronized with the current item in the Items property.
What's the next step? Display the selected item:
<StackPanel DataContext="{Binding persons}"/>
StackPanel is not an ItemsControl, it will not try to display all the items in persons but instead it will look for the selected one.
The ICollectionView interface contains a member called CurrentItem. What the IsSynchronizedWithCurrentItem does is: whenever an item is clicked on the ItemsControl, it sets the CurrentItem for the collection view. The ICollectionView also has two events: CurrentItemChanging and CurrentItemChanged. When the IsSynchronizedWithCurrentItem property is set, the ItemsControl will update the SelectedItem based on what the ICollectionView's CurrentItem is.
Further more, using UpdateSourceTrigger=PropertyChanged you will be able to update you selected item and this will be immediately displayed in the ListBox.
OK, that's about, here is the rest of the code:
public class Person : INotifyPropertyChanged
{
private string _Name;
public string Name
{
get { return _Name; }
set
{
_Name = value;
PropertyChanged(this, new PropertyChangedEventArgs("Name"));
}
}
private int _Age;
public int Age
{
get { return _Age; }
set
{
_Age = value;
PropertyChanged(this, new PropertyChangedEventArgs("Age"));
}
}
public event PropertyChangedEventHandler PropertyChanged = delegate { };
}
And the codebehind:
public partial class MainWindow : Window
{
public ObservableCollection<Person> persons { get; set; }
public Person SelectedPerson
{
get { return (Person)GetValue(SelectedPersonProperty); }
set { SetValue(SelectedPersonProperty, value); }
}
// Using a DependencyProperty as the backing store for SelectedPerson. This enables animation, styling, binding, etc...
public static readonly DependencyProperty SelectedPersonProperty =
DependencyProperty.Register("SelectedPerson", typeof(Person), typeof(MainWindow), new PropertyMetadata(null));
public MainWindow()
{
InitializeComponent();
persons = new ObservableCollection<Person>();
persons.Add(new Person() { Name = "Name1", Age = 20 });
persons.Add(new Person() { Name = "Name2", Age = 25 });
persons.Add(new Person() { Name = "Name3", Age = 30 });
this.DataContext = this;
}
private void btnAddItem_Click(object sender, RoutedEventArgs e)
{
persons.Add(new Person() { Name = "NameAdded", Age = 50 });
}
}
As you see, your SelectionChanged handler is not needed anymore.
You may be asking, what is that SelectedPerson in the code behind:
Add this binding on the ListBox:
SelectedItem="{Binding SelectedPerson}"
And in that AddToSprint_Click use the SelectedPerson to get the Person instead of directly accessing the ListBox.

How to get CheckBox "Ticked" inside ListBox on run time

I am creating windows phone 8 application, I have checkbox inside listbox, how do I get checkbox "CHECKED" when I click on checkbox?
I tried my best but not getting the result?
see my code below:
<ListBox x:Name="listBox1" Width="429" Height="621" HorizontalAlignment="Left" Margin="21,43,0,59" VerticalAlignment="Top" ItemsSource="{Binding}" SelectedItem="{Binding}" SelectionChanged="listBox1_SelectionChanged" SelectionMode="Extended">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<StackPanel Orientation="Vertical" Width="440">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding}" TextWrapping="Wrap" Foreground="Black" FontSize="22" Height="30" TextAlignment="Left" Width="Auto" FontWeight="SemiBold"/>
<TextBlock Text="{Binding}" TextWrapping="Wrap" Foreground="Black" FontSize="22" Margin="5" Height="30" TextAlignment="Left" Width="Auto" FontWeight="SemiBold"/>
</StackPanel>
<StackPanel>
<TextBlock Text="Favorite" TextWrapping="Wrap" Foreground="Black" FontSize="22" Height="30" FontWeight="SemiBold" Margin="344,-35,9,0"/>
</StackPanel>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding}" TextWrapping="Wrap" Foreground="Black" FontSize="22" Height="Auto" Width="Auto" TextAlignment="Left" FontWeight="SemiBold"/>
</StackPanel>
<CheckBox x:Name="CheckBox1" Height="72" Foreground="Black" IsChecked="False" Margin="353,-40,28,0" BorderBrush="Black" Loaded="CheckBox1_Loaded" Checked="CheckBox1_Checked" Unchecked="CheckBox1_Unchecked"/>
</StackPanel>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Here is my code behind file:
private void CheckBox1_Checked(object sender, RoutedEventArgs e)
{
CheckBox cb = (CheckBox)sender;
cb.IsChecked = true;
}

I tried this on emulator in my listbox and it works fine. The textboxes checked and unchecked without any problem.

<ListBox.BorderBrush>
<SolidColorBrush />
</ListBox.BorderBrush>
<ListBox.ItemTemplate>
<DataTemplate>
<Border BorderBrush="Black" BorderThickness="0,1,0,0" Width="600" Padding="0">
<StackPanel Orientation="Horizontal" Margin="0,0,0,0">
<StackPanel Orientation="Horizontal" Margin="0,0,0,0">
<Image Stretch="UniformToFill" Source="{Binding Image}" Width="130" Height="130" HorizontalAlignment="Center" VerticalAlignment="Center">
<Image.Clip>
<RectangleGeometry RadiusX="15" RadiusY="15" Rect="0,0,130,130" />
</Image.Clip>
</Image>
<--CheckBox x:Name="CheckBox1" Height="72" Foreground="Black" IsChecked="False" BorderBrush="Black"/-->
</StackPanel>
</Border>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>

I got the solution:
private void CheckBox1_Checked(object sender, RoutedEventArgs e)
{
CONTACTS data = (sender as CheckBox).DataContext as CONTACTS;
string contactId = data.contactId;
string isFav = data.isFavourite.ToString();
}

Here is the answer:
private void CheckBox1_Checked(object sender, RoutedEventArgs e)
{
CLASS_NAME item = (sender as CheckBox).DataContext as CLASS_NAME;
string id = item.Id;
string name = item.Name;
}

longListSelector get index

I have longListSelector:
<DataTemplate x:Key="AddrBookItemTemplate" >
<StackPanel VerticalAlignment="Top">
<Grid Background="#3FCDCDCD" Margin="3,3,3,3">
<Image Source ="{Binding UrlImage}" Height="100" Width="100" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="0,0,0,0" Stretch="Fill"/>
<TextBlock Text="{Binding Title}" TextWrapping="Wrap" Margin="110,0,0,0" Foreground="Black" FontFamily="Portable User Interface"/>
</Grid>
</StackPanel>
</DataTemplate>
</phone:PhoneApplicationPage.Resources>
<phone:LongListSelector
x:Name="AddrBook"
Background="Transparent"
ItemTemplate="{StaticResource AddrBookItemTemplate}"
IsGroupingEnabled="true"
HideEmptyGroups ="true"
SelectionChanged="AddrBook_SelectionChanged"
/>
Preview - name of my class
How can i get index of PressedItem?
What should i write here -
private void AddrBook_SelectionChanged(object sender, SelectionChangedEventArgs e)
{ }

you should write
var longlistselector = (sender as LongListSelector);
int index = longlistselector.DataSource.IndexOf(longlistselector.SelectedItem);

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