I have two user controls, one with input fields (Control A) and another one with Data Grid (Control B).
How can i display grid view selected item in textbox in WPF? Is it possible to do it only using WPF or must do inside the program code or both?
Control A with
<UserControl x:Class="PayrollSystem.Controls.EmployeeDetailControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<TextBlock Text="First Name : " Grid.Column="0" Grid.Row="2" HorizontalAlignment="Right" VerticalAlignment="Center"/>
<StackPanel Margin="2" Grid.Column="1" Grid.Row="2" Orientation="Vertical" HorizontalAlignment="Center" VerticalAlignment="Center">
<TextBox x:Name="txtFirstName" Text="{Binding Path=FirstName, Mode=TwoWay}" Width="200"/>
</StackPanel>
Control B with
<UserControl x:Class="PayrollSystem.Controls.EmployeeRecordControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<DataGrid x:Name="dg" AlternatingRowBackground="Gray" CanUserAddRows="False" AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Header="First Name" Binding="{Binding Path=FirstName, Mode=TwoWay}"/>
</DataGrid.Columns>
EmployeeRecordControl seems redundant. Instead of that, just use a DataGrid directly, and bind its ItemsSource and SelectedItem to two properties of a view model class like this:
public class ViewModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
public ObservableCollection<Employee> Employees { get; }
= new ObservableCollection<Employee>();
private Employee selectedEmployee;
public Employee SelectedEmployee
{
get => selectedEmployee;
set
{
selectedEmployee = value;
PropertyChanged?.Invoke(this,
new PropertyChangedEventArgs(nameof(SelectedEmployee)));
}
}
}
Then create and bind to the view model like this:
<Window.DataContext>
<local:ViewModel/>
</Window.DataContext>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<DataGrid ItemsSource="{Binding Employees}"
SelectedItem="{Binding SelectedEmployee}"
CanUserAddRows="False"/>
<local:EmployeeDetailControl Grid.Column="1"
DataContext="{Binding SelectedEmployee}"/>
</Grid>
Related
I have a problem with my List View.
It shows all the elements that I add to the ObservableCollection binded to it, just how it's supposed to work, but when I right-click any of it's elements, the bindings won't work and it won't display the data as I intend it to do.
I created another WPF project to show you the problem more clearly.
Here's my wpf code:
<Window x:Class="WpfApp2.MainWindow"
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"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525">
<Grid>
<ListView x:Name="listViewWithContextMenu" ItemsSource="{Binding Path=CollectionOfThings}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<ListView.View>
<GridView>
<GridViewColumn Width="120" Header="Name" DisplayMemberBinding="{Binding Name}"/>
<GridViewColumn Width="120" Header="Quantity" DisplayMemberBinding="{Binding Quantity}"/>
</GridView>
</ListView.View>
<ListView.ContextMenu>
<ContextMenu>
<StackPanel Orientation="Horizontal">
<StackPanel Orientation="Vertical" Margin="3">
<StackPanel Orientation="Horizontal">
<TextBlock Text="Name: "></TextBlock>
<TextBlock Text="{Binding Name}"></TextBlock>
</StackPanel>
<StackPanel Orientation="Horizontal">
<TextBlock Text="Quantity: "></TextBlock>
<TextBlock Text="{Binding Quantity}"></TextBlock>
</StackPanel>
</StackPanel>
</StackPanel>
</ContextMenu>
</ListView.ContextMenu>
</ListView>
</Grid>
and the c# code behind it:
using System.Windows;
using System.Collections.ObjectModel;
namespace WpfApp2
{
public partial class MainWindow : Window
{
public ObservableCollection<DataOfThing> CollectionOfThings = new ObservableCollection<DataOfThing>();
public MainWindow()
{
InitializeComponent();
CollectionOfThings.Add(new DataOfThing() { Name = "Some Name", Quantity = 2 });
CollectionOfThings.Add(new DataOfThing() { Name = "Some Other Name", Quantity = 3 });
CollectionOfThings.Add(new DataOfThing() { Name = "Strange Name", Quantity = 1 });
listViewWithContextMenu.ItemsSource = CollectionOfThings;
}
}
public class DataOfThing
{
public string Name { get; set; }
public int Quantity { get; set; }
}
}
And here's what I get:
What happens is that ContextMenu is not in the same visual tree of your ListView (or any other control). It is completely separated from your Window element tree and that's why it gets lost on binding.
I got a solution that might not be the most beautiful but works :)
Set a ContextMenuOpening event to your ListView:
<ListView x:Name="listViewWithContextMenu" ItemsSource="{Binding Path=CollectionOfThings}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" ContextMenuOpening="listViewWithContextMenu_ContextMenuOpening">
And in your codebehind, do:
private void listViewWithContextMenu_ContextMenuOpening(object sender, ContextMenuEventArgs e)
{
var list = sender as ListView;
list.ContextMenu.DataContext = list.SelectedItem;
}
I'm tring to databind properties of an ObservableCollection to a ListBox (Just the Title property for example).
By clicking on one of the ListItem (with an event ), i'd like to display all the properties of the Collection into a StackPanel. After many tries, I still don't know how can I figure it out...
Here is my code behind :
public partial class TestListView : Window
{
public TestListView()
{
ObservableCollection<Programme> pgr = new ObservableCollection<Programme>();
pgr = readfile();
InitializeComponent();
}
public class Programme
{
public String Title { get; set; }
public String Date { get; set; }
public String Chaine { get; set; }
public Programme(String Title, String Date, String Chaine)
{
this.Title = Title;
this.Date = Date;
this.Chaine = Chaine;
}
}
Here is my XAML :
<Window x:Class="Test.TestListView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:Test;assembly=Test"
Title="TestListView" Height="500" Width="1000" x:Name="Window">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="249*"/>
<ColumnDefinition Width="743*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="20*"/>
<RowDefinition Height="428*"/>
<RowDefinition Height="21*"/>
</Grid.RowDefinitions>
<ListBox Name="l1" ItemsSource="{Binding pgr}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding Title}"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<StackPanel Grid.Column="1" Grid.Row="1">
<TextBox Margin="343,0,0,0" x:Name="Recherche"></TextBox>
<Button Height="37" Margin="669,0,0,0" ></Button>
<TextBlock x:Name="t1" Margin="214,0,293,0" Height="33" />
</StackPanel>
</Grid>
</Window>
You need to bind your data to (public) properties. Also, you don't need to use ObservableCollection; any selection changes will be picked up anyhow.
Here's a working sample, with layout and other bits and pieces changed to make it compile for me:
public partial class MainWindow
{
public IList<Programme> pgr { get; }
public MainWindow()
{
pgr = new List<Programme>
{
new Programme("First", "FirstDate", "FirstChaine"),
new Programme("Second", "SecondDate", "SecondChaine"),
new Programme("Third", "ThirdDate", "ThirdChaine"),
};
InitializeComponent();
}
public class Programme
{
// No changes
}
}
...and the XAML:
<Window
x:Name="self"
x:Class="WpfApplication1.MainWindow"
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:WpfApplication1"
mc:Ignorable="d"
Title="MainWindow"
Height="350"
Width="525">
<StackPanel DataContext="{Binding ElementName=self}" Orientation="Horizontal">
<ListBox Name="l1" ItemsSource="{Binding pgr}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding Title}"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<StackPanel Orientation="Vertical">
<TextBox Margin="10" Text="{Binding ElementName=l1,Path=SelectedItem.Title}" />
<Button Height="37" Margin="0" Content="{Binding ElementName=l1,Path=SelectedItem.Date}"></Button>
<TextBlock Margin="10" Height="33" Text="{Binding ElementName=l1,Path=SelectedItem.Chaine}" />
</StackPanel>
</StackPanel>
</Window>
Note the bindings that reference the selected item:
Text="{Binding ElementName=l1,Path=SelectedItem.Title}"
I'm trying to bind my elements in a datatemplate that is define in dictionary.
Let's make it simple.
I have a simple class
public class A { public string Data {get;set} }
I have a simple view that contains a ListBox, with ItemSources is a list of class A :
<ListBox ItemsSource="{Binding AList}">
The point is, when I define Itemplate in view directly, bind works :
<ListBox.ItemTemplate>
<DataTemplate >
<TextBlock Text="{Binding Data}" />
<Rectangle Fill="Red" Height="10" Width="10"/>
</DataTemplate>
</ListBox.ItemTemplate>
This works great.
But when I define this ItemTemplate in resource Dictionary, binding doesn't works ?
How can I do that ?
PS : This is a simple example to explain my problem, don't tell me to override toString function to make it works or use classe template, my real case is very more complexe than this.
Thanks for help
Create a new Dictionary1.xaml
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<DataTemplate x:Key="dataTemplate">
<StackPanel>
<TextBlock Text="{Binding Data}" />
<Rectangle Fill="Red" Height="10" Width="10"/>
</StackPanel>
</DataTemplate>
</ResourceDictionary>
In MainWindow.xaml refer it
<Window.Resources>
<ResourceDictionary Source="Dictionary1.xaml" />
</Window.Resources>
<ListBox Name="lst" ItemTemplate="{StaticResource dataTemplate}"></ListBox>
MainWindow.cs:
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void MainWindow_OnLoaded(object sender, RoutedEventArgs e)
{
var observable = new ObservableCollection<Test>();
observable.Add(new Test("A"));
observable.Add(new Test("B"));
observable.Add(new Test("C"));
this.lst.ItemsSource = observable;
}
}
public class Test
{
public Test(string dateTime)
{
this.Data = dateTime;
}
public string Data { get; set; }
}
You give your DataTemplate a Key so you can use explicitly define your template and reuse your template. You also need to make sure the ItemsControl is a child of the control which loads the dictionary.
<DataTemplate x:Key="ADataTemplate">
<TextBlock Text="{Binding Data}" />
<Rectangle Fill="Red" Height="10" Width="10"/>
</DataTemplate>
<ListBox ItemsSource="{Binding YourItems}"
ItemTemplate="{StaticResource ADataTemplate}" />
Note: You can use implicit styling on ListBox, however that would apply the same style to all of your ListBoxes.
Declare your data template in the Resources section of the current Window/UserControl etc as follows and then reference via static resource declaration:
<Window.Resources> For example...
<DataTemplate x:Key="MyTemplate">
<TextBlock Text="{Binding Data}" />
<Rectangle Fill="Red" Height="10" Width="10"/>
</DataTemplate>
</Window.Resources>
<ListBox ItemTemplate="{StaticResource MyTemplate}" />
I have a ComboBox in ItemsControl .I use WPF and MVVM, I have problem to figure out the binding to ComboBox, would someone give me a hand for this. XAML and VM as following:
<Window x:Class="OutageManagement.Views.MarketAssignmentsView"
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"
mc:Ignorable="d"
Title="Market Selection"
WindowStartupLocation="CenterOwner"
Width="700" Height="850"
DataContext="{Binding MarketAssignmentsVM, Source={StaticResource Locator}}" >
<Grid>
<ItemsControl ItemsSource="{Binding USMarket}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
</Grid.ColumnDefinitions>
<Label Content="{Binding MarketName}" Height="28"
HorizontalAlignment="Left" Name="lblUSMarketName"
VerticalAlignment="Center" />
<ComboBox Grid.Column="1" Height="23" HorizontalAlignment="Left"
Name="cbUSUsers" VerticalAlignment="Center" MinWidth="140"
ItemsSource="{Binding RelativeSource={RelativeSource
AncestorType=Window}, Path=UserList}"
DisplayMemberPath="UserName"
SelectedValue="{Binding SelectedUserID}"
SelectedValuePath="UserID"/>
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Grid>
</Window>
ViewModel :
public class MarketAssignmentsViewModel : ViewModelBase
{
#region Data
ObservableCollection<NOCUserViewModel> _userList;
ObservableCollection<MarketAssignmentViewModel> _usMarket;
ObservableCollection<MarketAssignmentViewModel> _caMarket;
#endregion
#region Constructor
public MarketAssignmentsViewModel()
{
GetUserList();
GetMarketAssignments();
}
#endregion
#region Properties
public ObservableCollection<NOCUserViewModel> UserList
{
get { return _userList; }
}
public ObservableCollection<MarketAssignmentViewModel> USMarket
{
get { return _usMarket; }
}
public ObservableCollection<MarketAssignmentViewModel> CAMarket
{
get { return _caMarket; }
}
#endregion
.
.
.
}
The problem is that you're trying to access the UserList as a property of the Window, instead of a property of the Window's DataContext...
Modify the ItemsSource like this:
<ComboBox ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor
AncestorType=Window}, Path=DataContext.UserList}" ... />
I recommend always looking in the Output window when you have binding problems, you probably would have seen something like this:
System.Windows.Data Error: 40 : BindingExpression path error: 'UserList' property not found on 'object' ''MarketAssignmentsView' (Name='')'.
I have those two classes:
class DownloadLink
{
public string Name { get; private set; }
public string Url { get; private set; }
//(...)
}
class DownloadGroup
{
public List<DownloadLink> Links { get; private set; }
//(...)
}
class Manager
{
public List<DownloadGroup> Groups { get; private set; }
}
Manager managerOBJ = new Manager();
I want to display this like that:
Everything will be in ListBox:
I wan to bind managerOBJ.Groups to that ListBox. - How to do it?
Than I want to create DataTamplate to display each group and all links in that group. - How to do it?
I want to do as much as possible from XAML
UPDATE:
This is what I got. It's not workig. List box is empty.
<ListBox DockPanel.Dock="Right" VerticalAlignment="Stretch" Width="500" HorizontalAlignment="Right" Background="#FFE1FFF5" HorizontalContentAlignment="Stretch" ScrollViewer.HorizontalScrollBarVisibility="Disabled" ScrollViewer.VerticalScrollBarVisibility="Visible" ItemsSource="{Binding Path=Groups}" Name="GroupsListBox">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Height="30" VerticalAlignment="Top" Width="500" >
<Grid Height="Auto" Width="500">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Label Content="XX MB w XX plikach" HorizontalAlignment="Stretch" Margin="0"/>
</Grid>
<ListBox HorizontalAlignment="Stretch" Height="43" Margin="0,5,0,0" Width="Auto" VerticalAlignment="Top" ItemsSource="{Binding Path=Links}">
<ListBox.ItemTemplate>
<DataTemplate>
<Label Content="{Binding Path=Name}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
and in code behid I have:
RapideoAccount = new Rapideo();
GroupsListBox.DataContext = RapideoAccount;
The whole manager is contained in a listbox, for each downloadgroup in the manager you add an itemscontrol that contains another items control with the links in it.
This can be done by using DataTemplates:
<ListBox Name="myGroups"
ItemsSource="{Binding Path=Groups}">
<!-- each List<DownloadGroup> in the manager: -->
<ListBox.ItemTemplate>
<DataTemplate>
<ItemsControl ItemsSource="{Binding Path=Links}">
<!-- each Link in the Downloadgroup -->
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding Path=Name}" />
<TextBlock Text="{Binding Path=Url}" />
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
In code you would put:
Manager managerOBJ = new Manager();
myGroups.DataContext = managerOBJ;
define managerOBJ as a property in your viewmodel
binding viewmodel to your view.
binding ListBox itemssource to managerOBJ.Groups.
define DataTemplate inside ListBox to display each DownloadGroup.