Editing properties in DataTemplate - c#

I have defined this in XAML:
<phone:PhoneApplicationPage.Resources>
<DataTemplate x:Key="sendContentTemplate">
<StackPanel>
<TextBlock Name="P1Label" Text="1" Visibility="Collapsed" />
<TextBox Name="P1" Visibility="Collapsed" />
<TextBlock Name="P2Label" Text="2" Visibility="Collapsed" />
<TextBox Name="P2" Visibility="Collapsed" />
<TextBlock Name="P3Label" Text="3" Visibility="Collapsed" />
<TextBox Name="P3" Visibility="Collapsed" />
</StackPanel>
</DataTemplate>
</phone:PhoneApplicationPage.Resources>
Then, in code, I define a CustomMessageBox from Windows Phone Toolkit in this way:
DataTemplate contentTemplate = (DataTemplate)Resources["sendContentTemplate"];
SetVisibility(Contrato[0], contentTemplate);
var messageBox = new CustomMessageBox
{
Caption = "Send",
Message = "",
ContentTemplate = contentTemplate,
LeftButtonContent = "Send",
RightButtonContent = "Close"
};
messageBox.Show();
I'm trying to modify properties in the DataTemplate in code, but without success. Now, I'm doing this:
private void SetVisibility(Contrato contrato, DataTemplate dataTemplate)
{
var controls = AllChildren(dataTemplate.LoadContent());
if (contrato.Number == 1)
{
controls.Find(c => c.Name == "P1Label").Visibility = Visibility.Visible;
controls.Find(c => c.Name == "P1").Visibility = Visibility.Visible;
}
}
private List<FrameworkElement> AllChildren(DependencyObject parent)
{
var list = new List<FrameworkElement>();
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
{
var child = VisualTreeHelper.GetChild(parent, i);
if (child is FrameworkElement)
{
list.Add((FrameworkElement)child);
}
list.AddRange(AllChildren(child));
}
return list;
}
Is it possible to modify a DataTemplate property by code?

Finally, I did it by adding controls by code. I couldn't find another way to do it.
I did it in this way:
var messageBox = new CustomMessageBox {
Caption = "Send",
Message = "",
Content = CreateMessageBoxContent(c.T),
LeftButtonContent = "Send",
RightButtonContent = "Close"
};
private static object CreateMessageBoxContent(string t)
{
var stackPanel = new StackPanel();
var P1Label = new TextBlock {Text = AppResources.P1Label};
var P2Label = new TextBlock {Text = AppResources.P2Label};
var P3Label = new TextBlock {Text = AppResources.P3Label};
var P1 = new TextBox();
var P2 = new TextBox();
var P3 = new TextBox();
if (t == "T2" || t == "T20")
{
stackPanel.Children.Add(P1Label);
stackPanel.Children.Add(P1);
}
else if (t =="T20D" || t == "T21D")
{
stackPanel.Children.Add(P1Label);
stackPanel.Children.Add(P1);
stackPanel.Children.Add(P3Label);
stackPanel.Children.Add(P3);
}
else if (t == "T3" || t == "T31")
{
stackPanel.Children.Add(P1Label);
stackPanel.Children.Add(P1);
stackPanel.Children.Add(P2Label);
stackPanel.Children.Add(P2);
stackPanel.Children.Add(P3Label);
stackPanel.Children.Add(P3);
}
return stackPanel;
}

Related

Wp8 application custom control which has some dynamic buttons , shows nothing on mainpage

Problem while programmatically generating buttons in a user control of windows phone, and using this user control to mainpage.xaml but there are no buttons shown when application runs.
here is the code snippet which i am using, Thanks !
usercontrol.xaml:
<ScrollViewer >
<StackPanel x:Name="Panel">
<ContentControl x:Name="container"></ContentControl>
</StackPanel>
</ScrollViewer>
usercontrol.xaml.cs:
public LoginInterfaceControl()
{
InitializeComponent();
this.container = new ContentControl();
this.Panel = new StackPanel();
}
public LoginInterfaceControl(string Api_key)
{
InitializeComponent();
this.Panel = new StackPanel();
this.container = new ContentControl();
loginWP_DownloadString(Api_key);
}
public async void loginWP_DownloadString(string key)
{
InitializeComponent();
string cont;
using (HttpClient client = new HttpClient())
{
var result = await client.GetAsync("http://cdn.loginradius.com/interface/json/" + key + ".json");
if (result.StatusCode == HttpStatusCode.OK)
{
cont = await result.Content.ReadAsStringAsync();
MessageBox.Show(cont);
}
else
{
cont = await result.Content.ReadAsStringAsync();
MessageBox.Show(cont);
}
if (!string.IsNullOrEmpty(cont))
{
var root1 = JsonConvert.DeserializeObject<RootObject>(cont);
int no = 1;
foreach (var provider in root1.Providers)
{
no++;
Button newBtn = new Button()
{
Content = provider.Name.ToString(),
Name = provider.Name.ToString(),
//Width = 88,
//Height = 77,
Visibility = System.Windows.Visibility.Visible,
//Margin = new Thickness(5 + 20, 5, 5, 5),
Background = new SolidColorBrush(Colors.Black),
VerticalAlignment =VerticalAlignment.Center,
Opacity=0.5
};
newBtn.Click += google_click;
System.Windows.Visibility.Visible;
container.Opacity = 0.5;
this.container.Content = newBtn;
}
}
}
Mainpage.xaml:
<Grid xmlns:src="clr-namespace:LRDemo"
Background="White" Margin="10,0,-10,186" Grid.Row="1">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<src:LoginInterfaceControl Grid.Row="0"/>
<!--<src:LoginInterfaceControl Grid.Row="1" Margin="0,15,0,0"/>-->
</Grid>
usercontrol.xaml
<ScrollViewer>
<ContentControl x:Name="container">
<StackPanel x:Name="Panel">
</StackPanel>
</ContentControl>
</ScrollViewer>
there is no need to again create stackpanel and contentcontrol in constructor of usercontrol because they are already there in usercontrol structure.
Contentcontrol can hold content that is assign to it last so I took stackpanel into contentcontol.
usercontrol.xaml.cs
public LoginInterfaceControl()
{
this.InitializeComponent();
abc();
}
public void abc()
{
for (int i = 0; i <= 5; i++)
{
Button newBtn = new Button()
{
Content = "name" + i,
Name = "name" + i,
Background = new SolidColorBrush(Colors.Black),
VerticalAlignment = VerticalAlignment.Center,
Opacity = 0.5
};
newBtn.Click += newBtn_Click;
container.Opacity = 0.5;
this.Panel.Children.Add(newBtn);
}
}
P.S : I do not know your exact need so I took static methods to add buttons.

Unable to change back color of selected tabitem in silverlight

I have a TabControl with TabItem. I want to change the background colour of the tabitem header for the selected tab.
So I set the XAML code as below
<sdk:TabControl Background="WhiteSmoke" Foreground="Black"
SelectionChanged="TabControl_SelectionChanged">
<sdk:TabItem Name="adminTab" BorderBrush="Black">
<sdk:TabItem.Header>
<StackPanel Name="adminsp" Background="#C7CEF7">
<Image Name="ico1" Source="Images/admin.png"/>
<TextBlock Text="Admin"/>
</StackPanel>
</sdk:TabItem.Header>
</sdk:TabItem>
<sdk:TabItem Name="userTab" BorderBrush="Black">
<sdk:TabItem.Header>
<StackPanel Name="usersp" Background="#C7CEF7">
<Image Name="ico1" Source="Images/user.png"/>
<TextBlock Text="User"/>
</StackPanel>
</sdk:TabItem.Header>
</sdk:TabItem>
and in CS code as
void TabControl_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
TabControl tab = sender as TabControl;
if (adminTab.IsSelected)
{
adminsp.Background = new SolidColorBrush(Colors.Blue);
}
else
{
adminsp.Background = new SolidColorBrush(Color.FromArgb(255, 199, 229, 249));
}
.
.
}
But the background color is not changing, Any help would be appreciated!
You should do something like this if you want to do it directway, otherwise you should Edit the style of TabControl,
TabControl currentTab = (TabControl)sender;
TabItem selectedItem = currentTab.SelectedItem as TabItem;
if (selectedItem != null)
{
foreach (TabItem currentItem in currentTab.Items)
{
if (currentItem == selectedItem)
{
selectedItem.BorderBrush = new SolidColorBrush() { Color = Colors.Green };
selectedItem.Background = new SolidColorBrush() { Color = Colors.LightGray };
}
else
{
currentItem.BorderBrush = new SolidColorBrush() { Color = Colors.Blue };
currentItem.Background = new SolidColorBrush() { Color = Colors.Gray };
}
}
}

Binding Button-Visibility in Datagrid

i've defined an initial Table with three rows and 9 Column in Datagrid. right now button should be visible only if i select a row and then press another button that i defined in my Ribbon-Tab after that my Button will be Visible. sofar everything works well, but the Problem is after saving my Table, closing it and open the Table again the button is not there anymore. I set the Visibility based on if the DataGridCell.IsSelected, also a BooleanToVisibilityConverter to convert the boolean value to a Visibility one.
can anyone help!
XAML:
<DataGrid.Resources>
<BooleanToVisibilityConverter x:Key="BoolToVisConverter" />
</DataGrid.Resources>
<DataGridTemplateColumn x:Name="subgraphtyp" Header="H." Width="50">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Button Name="btnTable" Visibility="{Binding Path=Hinterlegung, Converter=
{StaticResource BoolToVisConverter}}" Height="20" Width="25"
Click="Button_Table_Click">
<Image Height="16" Source="Subgraph.png" Stretch="Fill" Width="16"/>
</Button>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
C#:
public bool Hinterlegung { get; set; }
private void Button_StartTableModus(object sender, RoutedEventArgs e)
{
if (DataGrid1.SelectedItem != null && tabItem1.IsSelected)
{
TableDataRowStringItem item = (TableDataRowStringItem)DataGrid1.CurrentItem;
string wert = item.ObjectType;
string rowName = item.Name;
if (wert == "Function" || wert == "Process")
{
item.Hinterlegung = true;
if (!tabControl.Items.Contains(tabItem2))
{
tabControl.Items.Add(tabItem2);
tabItem2.Focus();
tabItem2.IsSelected = true;
tabItem2.Header = rowName;
TableTab.Visibility = Visibility.Visible;
openTabs++;
DataGrid2.IsReadOnly = false;
starting_Table_Mod_at_start2V();
}
}
}
}
//this my initial Table
private ObservableCollection<TableDataRowStringItem> tableobject = new
ObservableCollection<TableDataRowStringItem>();
private void starting_Table_Mod_at_start2V()
{
List<TableDataRowStringItem> rowstringList = new List<TableDataRowStringItem>();
TableDataRowStringItem item = new TableDataRowStringItem();
item.RowNumber = 1; item.saveFlag = true; item.ObjectType = "E"; item.Name = "E";
item.PredecessorRowNumber = "0"; rowstringList.Add(item);
item = new TableDataRowStringItem();
item.RowNumber = 2; item.ObjectType = "Function"; item.Name = "Function";
item.PredecessorRowNumber = "1"; rowstringList.Add(item);
item = new TableDataRowStringItem();
item.RowNumber = 3; item.ObjectType = "E"; item.Name = "E";
item.PredecessorRowNumber = "2"; rowstringList.Add(item);
for (int i = 0; i < rowstringList.Count; i++)
{
tableobject.Add(rowstringList[i]);
}
DataGrid2.ItemsSource = tableobject;
}
Your button's visibility is bound to your Hinterlegung variable which has a default value of false. So as best as I can tell, you change it to true in this method - Button_StartTableModus. But, when you reinitialize, the value reverts to false, so you need to set it to true.

Alphabetically searching of records via accessing rest services in windows phone 7

I am trying to make Alphabetically searching of records via accessing rest services in windows phone 7.
Design page code..
<controls:PivotItem Header="buddies">
<toolkit:LongListSelector x:Name="BookList" Background="Transparent" IsFlatList="true"
GroupViewOpened="LongListSelector_GroupViewOpened"
GroupViewClosing="LongListSelector_GroupViewClosing">
<toolkit:LongListSelector.GroupItemsPanel>
<ItemsPanelTemplate>
<toolkit:WrapPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</toolkit:LongListSelector.GroupItemsPanel>
<toolkit:LongListSelector.GroupItemTemplate>
<DataTemplate>
<Border Background="{Binding Converter={StaticResource GroupBackground}}"
Width="99" Height="99" Margin="6" IsHitTestVisible="{Binding HasItems}">
<TextBlock Text="{Binding Title}"
FontFamily="{StaticResource PhoneFontFamilySemiBold}"
FontSize="48"
Margin="8,0,0,0"
Foreground="{Binding Converter={StaticResource GroupForeground}}"
VerticalAlignment="Bottom"/>
<Border.Projection>
<PlaneProjection RotationX="-60"/>
</Border.Projection>
</Border>
</DataTemplate>
</toolkit:LongListSelector.GroupItemTemplate>
<toolkit:LongListSelector.GroupHeaderTemplate>
<DataTemplate>
<Border Background="Transparent" Margin="12,8,0,8">
<Border Background="{StaticResource PhoneAccentBrush}"
Padding="8,0,0,0" Width="62" Height="62"
HorizontalAlignment="Left">
<TextBlock Text="{Binding Title}"
Foreground="#FFFFFF"
FontSize="48"
FontFamily="{StaticResource PhoneFontFamilySemiLight}"
HorizontalAlignment="Left"
VerticalAlignment="Bottom"/>
</Border>
</Border>
</DataTemplate>
</toolkit:LongListSelector.GroupHeaderTemplate>
<toolkit:LongListSelector.ItemTemplate>
<DataTemplate>
<Grid Margin="12,8,0,8">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Image Width="110" Height="150" Source="{Binding ImageUrl}" VerticalAlignment="Top"/>
<StackPanel Grid.Column="1" VerticalAlignment="Top">
<TextBlock Text="{Binding AutherName}" Style="{StaticResource PhoneTextLargeStyle}" FontFamily="{StaticResource PhoneFontFamilySemiBold}" Margin="12,-12,12,6"/>
<TextBlock Text="{Binding Email}" Style="{StaticResource PhoneTextNormalStyle}" TextWrapping="Wrap" FontFamily="{StaticResource PhoneFontFamilySemiBold}"/>
<StackPanel Orientation="Horizontal">
<TextBlock Text="Title:" Style="{StaticResource PhoneTextSmallStyle}"/>
<TextBlock Text="{Binding Title}" Style="{StaticResource PhoneTextSmallStyle}" FontFamily="{StaticResource PhoneFontFamilySemiBold}"/>
</StackPanel>
<StackPanel Orientation="Horizontal">
<TextBlock Text="Price:" Style="{StaticResource PhoneTextSmallStyle}"/>
<TextBlock Text="{Binding Price}" Style="{StaticResource PhoneTextSmallStyle}" FontFamily="{StaticResource PhoneFontFamilySemiBold}"/>
</StackPanel>
</StackPanel>
</Grid>
</DataTemplate>
</toolkit:LongListSelector.ItemTemplate>
</toolkit:LongListSelector>
</controls:PivotItem>
</controls:Pivot>
</Grid>
Here is my MainPage.xaml.cs page code
private LongListSelector currentSelector;
List<Person> objperson = null;
// Constructor
public MainPage()
{
InitializeComponent();
string Categoryid = "2";
WebClient proxy = new WebClient();
proxy.DownloadStringAsync(new Uri("http://localhost:3160/Service1.svc/GetListItemDetail/" + Categoryid));
proxy.DownloadStringCompleted += new DownloadStringCompletedEventHandler(proxy_DownloadStringCompleted);
}
void proxy_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error == null)
{
XDocument doc = XDocument.Load(new StringReader(e.Result));
var CatList = (from item in doc.Descendants("ItemDetail")
select new Person
{
GenreName = item.Element("GenreName").Value.ToString(),
ItemID = Convert.ToInt32(item.Element("ItemID").Value),
CatID = Convert.ToInt32(item.Element("CatID").Value),
GenreID = Convert.ToInt32(item.Element("GenreID").Value),
AutherName = item.Element("AutherName").Value.ToString(),
Title = item.Element("Title").Value.ToString(),
Email = item.Element("Email").Value.ToString(),
Price = item.Element("Price").Value.ToString(),
Description = item.Element("Description").Value.ToString(),
ImageUrl = item.Element("ImageUrl").Value.ToString()
}).ToList();
objperson = new List<Person>();
objperson = CatList;
BookList.ItemsSource = CatList;
}
}
public List<Person> GetPersonListInfo()
{
List<Person> objp = new List<Person>();
objp = objperson;
return objp;
}
private void LongListSelector_GroupViewOpened(object sender, GroupViewOpenedEventArgs e)
{
//Hold a reference to the active long list selector.
currentSelector = sender as LongListSelector;
//Construct and begin a swivel animation to pop in the group view.
IEasingFunction quadraticEase = new QuadraticEase { EasingMode = EasingMode.EaseOut };
Storyboard _swivelShow = new Storyboard();
ItemsControl groupItems = e.ItemsControl;
foreach (var item in groupItems.Items)
{
UIElement container = groupItems.ItemContainerGenerator.ContainerFromItem(item) as UIElement;
if (container != null)
{
Border content = VisualTreeHelper.GetChild(container, 0) as Border;
if (content != null)
{
DoubleAnimationUsingKeyFrames showAnimation = new DoubleAnimationUsingKeyFrames();
EasingDoubleKeyFrame showKeyFrame1 = new EasingDoubleKeyFrame();
showKeyFrame1.KeyTime = TimeSpan.FromMilliseconds(0);
showKeyFrame1.Value = -60;
showKeyFrame1.EasingFunction = quadraticEase;
EasingDoubleKeyFrame showKeyFrame2 = new EasingDoubleKeyFrame();
showKeyFrame2.KeyTime = TimeSpan.FromMilliseconds(85);
showKeyFrame2.Value = 0;
showKeyFrame2.EasingFunction = quadraticEase;
showAnimation.KeyFrames.Add(showKeyFrame1);
showAnimation.KeyFrames.Add(showKeyFrame2);
Storyboard.SetTargetProperty(showAnimation, new PropertyPath(PlaneProjection.RotationXProperty));
Storyboard.SetTarget(showAnimation, content.Projection);
_swivelShow.Children.Add(showAnimation);
}
}
}
_swivelShow.Begin();
}
private void LongListSelector_GroupViewClosing(object sender, GroupViewClosingEventArgs e)
{
//Cancelling automatic closing and scrolling to do it manually.
e.Cancel = true;
if (e.SelectedGroup != null)
{
currentSelector.ScrollToGroup(e.SelectedGroup);
}
//Dispatch the swivel animation for performance on the UI thread.
Dispatcher.BeginInvoke(() =>
{
//Construct and begin a swivel animation to pop out the group view.
IEasingFunction quadraticEase = new QuadraticEase { EasingMode = EasingMode.EaseOut };
Storyboard _swivelHide = new Storyboard();
ItemsControl groupItems = e.ItemsControl;
foreach (var item in groupItems.Items)
{
UIElement container = groupItems.ItemContainerGenerator.ContainerFromItem(item) as UIElement;
if (container != null)
{
Border content = VisualTreeHelper.GetChild(container, 0) as Border;
if (content != null)
{
DoubleAnimationUsingKeyFrames showAnimation = new DoubleAnimationUsingKeyFrames();
EasingDoubleKeyFrame showKeyFrame1 = new EasingDoubleKeyFrame();
showKeyFrame1.KeyTime = TimeSpan.FromMilliseconds(0);
showKeyFrame1.Value = 0;
showKeyFrame1.EasingFunction = quadraticEase;
EasingDoubleKeyFrame showKeyFrame2 = new EasingDoubleKeyFrame();
showKeyFrame2.KeyTime = TimeSpan.FromMilliseconds(125);
showKeyFrame2.Value = 90;
showKeyFrame2.EasingFunction = quadraticEase;
showAnimation.KeyFrames.Add(showKeyFrame1);
showAnimation.KeyFrames.Add(showKeyFrame2);
Storyboard.SetTargetProperty(showAnimation, new PropertyPath(PlaneProjection.RotationXProperty));
Storyboard.SetTarget(showAnimation, content.Projection);
_swivelHide.Children.Add(showAnimation);
}
}
}
_swivelHide.Completed += _swivelHide_Completed;
_swivelHide.Begin();
});
}
private void _swivelHide_Completed(object sender, EventArgs e)
{
//Close group view.
if (currentSelector != null)
{
currentSelector.CloseGroupView();
currentSelector = null;
}
}
I am new to windows phone 7 application development, no idea about grouping of alphabets in Longlistselector. Please help me in that. Thanks in advance.
There is code I used once for grouping. As you can see, it's similar to Claus's:
public class YourList : ObservableCollection<ItemsInGroup>
{
private static readonly string Groups = "#abcdefghijklmnopqrstuvwxyz";
Dictionary<string, ItemsInGroup> groups = new Dictionary<string, ItemsInGroup>();
public YourList()
{
foreach (char c in Groups)
{
ItemsInGroup group = new ItemsInGroup(c.ToString());
this.Add(group);
groups[c.ToString()] = group;
}
}
public void AddItem(Item item)
{
string GroupKey = Item.GetSomeFieldKey(item);// a, b, etc.
for (int i = 0; i < groups[GroupKey].Count; i++)
{
if (Item.CompareBySomeField(item, groups[GroupKey][i]) < 0)
{
groups[Item.GetSomeFilesKey(item)].Insert(i, item);
return;
}
}
groups[GroupKey].Add(item);
}
}
.
public class ItemsInGroup : ObservableCollection<Item>, INotifyPropertyChanged
{
public ItemsInGroup(string category)
{
Key = category;
}
public string Key { get; set; }
public bool HasItems { get { return Count > 0; } }
//INotifyPropertyChanged implementation
}
Item must implement:
public static string GetSomeFieldKey(Item item)
and
public static int CompareBySomeFields(object obj1, object obj2)
Usage:
YourList list = new YourList();
foreach (var item in resultListFromService)
{
list.AddItem(item); // fill list with items
}
myList.ItemsSource = list; // bind to UI
Hope this helps better understand how it works
A super easy way to do it, is to use a specialized collection for the LongListSelector. I just so happen to have written one
Basically you would change your code to the following:
BookList.ItemsSource = new LongListCollection<Person, char>(CatList, x => x.Title[0]));
And you would get the alphabetic grouping on the first character of the Title property.
The only detail you need to be aware of, is that your Person class would need to implement IComparable<Person> to be ordered by the Title property (because you do want sorting, right?)
Simply done as:
public int Compare(Person other)
{
if (other == null)
return 1;
return this.Title.CompareTo(other.Title);
}

How to set ItemsPanelTemplate to a dynamically created Grid in code behind

I've got this UserControl defined in XAML and would like to set the ItemsPanelTemplate dynamically in my code behind class (not in the XAML like in the example):
<UserControl>
<ItemsControl x:Name="Items">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<Grid> <!-- I want to add this Grid definition in code behind -->
<Grid.ColumnDefinitions>
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition />
</Grid.RowDefinitions>
</Grid>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</UserControl>
I tried something like
this.Items.ItemsPanel.Template = new Grid();
but failed miserably. Any help?
Background:
I only know the number of grid columns and rows at runtime.
You can do as you want by creating MannualCode in code behind as:
1. Create a Method as following which will return a ItemsPanelTemplate
private ItemsPanelTemplate GetItemsPanelTemplate()
{
string xaml = #"<ItemsPanelTemplate xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition />
</Grid.RowDefinitions>
</Grid>
</ItemsPanelTemplate>";
return XamlReader.Parse(xaml) as ItemsPanelTemplate;
}
Now add this template in your Listbox ItemsPanel as:
MyListBox.ItemsPanel = GetItemsPanelTemplate();
This is working fine for me. Hope this will help.
Keep Coding....:)
You need to create an ItemsPanelTemplate and set it's VisualTree to a FrameworkElementFactory (deprecated) which creates the Grid, or use the XamlReader to parse a XAML-string which specifies the template.
This question contains usage examples of both methods (albeit for a different template property).
An easier method to manipulate the panel at runtime is outlined in this question.
In case that you still have some work to do with the elements, you should take the following (extended) code:
First we need a helper in order to get the element:
// --------------------------------------------------------------------
// This function fetches the WrapPanel from oVisual.
private WrapPanel m_FetchWrapPanel (Visual oVisual)
{
// WrapPanel to be returned
WrapPanel oWrapPanel = null;
// number of childs of oVisual
int iNumberChilds = VisualTreeHelper.GetChildrenCount (oVisual);
// and running through the childs
int i = 0;
while ( ( i < iNumberChilds ) && ( oWrapPanel == null ) )
{ // fetching visual
Visual oVisualChild =
( VisualTreeHelper.GetChild (oVisual, i) as Visual );
if ( ( oVisualChild is WrapPanel ) is true )
{ // found
oWrapPanel = ( oVisualChild as WrapPanel );
}
else
{ // checking the childs of oVisualChild
oWrapPanel = m_FetchWrapPanel (oVisualChild);
};
// checking next child
i++;
};
// returning WrapPanel
return (oWrapPanel);
}
Now we create the Panel (or something):
// --------------------------------------------------------------------
private void m_SettingTemplate ()
{
// the online doc recommends to parse the template
string xaml =
#"<ItemsPanelTemplate
xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'
xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
<WrapPanel ItemWidth=""150"" MaxWidth=""150""/>
</ItemsPanelTemplate>";
// assigning the template
oMyListView.ItemsPanel = ( System.Windows.Markup.XamlReader.Parse (xaml) as ItemsPanelTemplate );
// fetching the WrapPanel
WrapPanel oWrapPanel = m_WrapPanelAusVisualHolen (oMyListView);
Debug.Assert (oWrapPanel != null);
if ( oWrapPanel != null )
{ // adjusting the size of the WrapPanel to the ListView
Binding oBinding = new Binding ("ActualWidth");
oBinding.Source = oMyListView;
oWrapPanel.SetBinding (WrapPanel.MaxWidthProperty, oBinding);
};
}
Here's a XAML based program which uses ItemsPanelTemplate with a Grid:
MainWindow.xaml:
<Window x:Class="WpfTutorialStatusBarGrid.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:WpfTutorialStatusBarGrid"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<DockPanel>
<StatusBar DockPanel.Dock="Bottom">
<StatusBar.ItemsPanel>
<ItemsPanelTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="100" />
</Grid.ColumnDefinitions>
</Grid>
</ItemsPanelTemplate>
</StatusBar.ItemsPanel>
<StatusBarItem Grid.Column="0">
<TextBlock Name="lblCursorPosition" />
</StatusBarItem>
<Separator Grid.Column="1"/>
<StatusBarItem Grid.Column="2">
<TextBlock Text="c:\temp\abc.txt"/>
</StatusBarItem>
<Separator Grid.Column="3"/>
<StatusBarItem Grid.Column="4">
<ProgressBar Value="50" Width="90" Height="16"/>
</StatusBarItem>
</StatusBar>
<TextBox AcceptsReturn="True" Name="txtEditor" SelectionChanged="TxtEditor_SelectionChanged"/>
</DockPanel>
</Window>
MainWindow.xaml.cs:
using System.Windows;
namespace WpfTutorialStatusBarGrid
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void TxtEditor_SelectionChanged(object sender, RoutedEventArgs e)
{
var row = txtEditor.GetLineIndexFromCharacterIndex(txtEditor.CaretIndex);
var col = txtEditor.CaretIndex - txtEditor.GetCharacterIndexFromLineIndex(row);
lblCursorPosition.Text = $"Line {row + 1}, Char {col + 1}";
}
}
}
It's a simple text editor with a status bar:
Here's the equivalent program with the code in C# instead of XAML:
MainWindow.xaml:
<Window x:Class="WpfTutorialStatusBarGridCs.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:WpfTutorialStatusBarGridCs"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<Grid>
</Grid>
</Window>
MainWindow.xaml.cs:
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
namespace WpfTutorialStatusBarGridCs
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
var dock_panel = new DockPanel();
Content = dock_panel;
var status_bar = new StatusBar();
dock_panel.Children.Add(status_bar);
DockPanel.SetDock(status_bar, Dock.Bottom);
var items_panel_template = new ItemsPanelTemplate();
{
var grid_factory = new FrameworkElementFactory(typeof(Grid));
{
{
var col = new FrameworkElementFactory(typeof(ColumnDefinition));
col.SetValue(ColumnDefinition.WidthProperty, new GridLength(100));
grid_factory.AppendChild(col);
}
{
var col = new FrameworkElementFactory(typeof(ColumnDefinition));
col.SetValue(ColumnDefinition.WidthProperty, new GridLength(1, GridUnitType.Auto));
grid_factory.AppendChild(col);
}
{
var col = new FrameworkElementFactory(typeof(ColumnDefinition));
col.SetValue(ColumnDefinition.WidthProperty, new GridLength(1, GridUnitType.Star));
grid_factory.AppendChild(col);
}
{
var col = new FrameworkElementFactory(typeof(ColumnDefinition));
col.SetValue(ColumnDefinition.WidthProperty, new GridLength(1, GridUnitType.Auto));
grid_factory.AppendChild(col);
}
{
var col = new FrameworkElementFactory(typeof(ColumnDefinition));
col.SetValue(ColumnDefinition.WidthProperty, new GridLength(100));
grid_factory.AppendChild(col);
}
}
items_panel_template.VisualTree = grid_factory;
}
status_bar.ItemsPanel = items_panel_template;
var text_block = new TextBlock();
{
var status_bar_item = new StatusBarItem();
Grid.SetColumn(status_bar_item, 0);
status_bar_item.Content = text_block;
status_bar.Items.Add(status_bar_item);
}
{
var separator = new Separator();
Grid.SetColumn(separator, 1);
status_bar.Items.Add(separator);
}
{
var status_bar_item = new StatusBarItem();
Grid.SetColumn(status_bar_item, 2);
status_bar_item.Content = new TextBlock() { Text = "abc" };
status_bar.Items.Add(status_bar_item);
}
{
var separator = new Separator();
Grid.SetColumn(separator, 3);
status_bar.Items.Add(separator);
}
{
var status_bar_item = new StatusBarItem();
Grid.SetColumn(status_bar_item, 4);
status_bar_item.Content = new ProgressBar() { Value = 50, Width = 90, Height = 16 };
status_bar.Items.Add(status_bar_item);
}
{
var text_box = new TextBox() { AcceptsReturn = true };
text_box.SelectionChanged += (sender, e) =>
{
var row = text_box.GetLineIndexFromCharacterIndex(text_box.CaretIndex);
var col = text_box.CaretIndex - text_box.GetCharacterIndexFromLineIndex(row);
text_block.Text = $"Line {row + 1}, Char {col + 1}";
};
dock_panel.Children.Add(text_box);
}
}
}
}
The C# version is much more verbose. However, with the help of some extension methods, it can be written in a fluent style, eliminating the intermediate variables:
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
var text_block = new TextBlock();
Content = new DockPanel()
.AddChildren(
new StatusBar()
.SetDock(Dock.Bottom)
.SetItemsPanel(
new ItemsPanelTemplate()
.SetVisualTree(
new FrameworkElementFactory(typeof(Grid))
.AppendChildren(
new FrameworkElementFactory(typeof(ColumnDefinition))
.SetValue_(ColumnDefinition.WidthProperty, new GridLength(100)),
new FrameworkElementFactory(typeof(ColumnDefinition))
.SetValue_(ColumnDefinition.WidthProperty, new GridLength(1, GridUnitType.Auto)),
new FrameworkElementFactory(typeof(ColumnDefinition))
.SetValue_(ColumnDefinition.WidthProperty, new GridLength(1, GridUnitType.Star)),
new FrameworkElementFactory(typeof(ColumnDefinition))
.SetValue_(ColumnDefinition.WidthProperty, new GridLength(1, GridUnitType.Auto)),
new FrameworkElementFactory(typeof(ColumnDefinition))
.SetValue_(ColumnDefinition.WidthProperty, new GridLength(100)))))
.AddItems(
new StatusBarItem() { Content = text_block }.SetColumn(0),
new Separator().SetColumn(1),
new StatusBarItem() { Content = new TextBlock() { Text = "abc" } }.SetColumn(2),
new Separator().SetColumn(3),
new StatusBarItem() { Content = new ProgressBar() { Value = 50, Width = 90, Height = 16 } }.SetColumn(4)),
new TextBox() { AcceptsReturn = true }
.AddSelectionChanged(
(sender, e) =>
{
var box = sender as TextBox;
var row = box.GetLineIndexFromCharacterIndex(box.CaretIndex);
var col = box.CaretIndex - box.GetCharacterIndexFromLineIndex(row);
text_block.Text = $"Line {row + 1}, Char {col + 1}";
}));
}
}
Here are the extension methods used:
public static class Extensions
{
public static T SetDock<T>(this T element, Dock dock) where T : UIElement
{
DockPanel.SetDock(element, dock);
return element;
}
public static T SetColumn<T>(this T element, int value) where T : UIElement
{
Grid.SetColumn(element, value);
return element;
}
public static T SetValue_<T>(this T factory, DependencyProperty dp, object value) where T : FrameworkElementFactory
{
factory.SetValue(dp, value);
return factory;
}
public static T AppendChildren<T>(this T factory, params FrameworkElementFactory[] children) where T : FrameworkElementFactory
{
foreach (var child in children)
factory.AppendChild(child);
return factory;
}
public static T SetVisualTree<T>(this T template, FrameworkElementFactory factory) where T : FrameworkTemplate
{
template.VisualTree = factory;
return template;
}
public static T1 SetItemsPanel<T1,T2>(this T1 control, T2 template) where T1 : ItemsControl where T2 : ItemsPanelTemplate
{
control.ItemsPanel = template;
return control;
}
public static T AddItems<T>(this T control, params object[] items) where T : ItemsControl
{
foreach (var item in items)
control.Items.Add(item);
return control;
}
public static T AddSelectionChanged<T>(this T obj, RoutedEventHandler handler) where T : TextBoxBase
{
obj.SelectionChanged += handler;
return obj;
}
public static T1 AddChildren<T1>(this T1 panel, params UIElement[] elements) where T1 : Panel
{
foreach (var elt in elements)
panel.Children.Add(elt);
return panel;
}
}
For anyone else...
... A control based on the ItemsControl which has an Orientation property.
It uses the FrameworkElementFactory as in the previous answers:
public class OrientationItemsControl : ItemsControl
{
public static readonly DependencyProperty OrientationProperty = WrapPanel.OrientationProperty.AddOwner(typeof(OrientationItemsControl), new PropertyMetadata(Changed));
private static void Changed(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (d is ItemsControl itemsControl && e.NewValue is Orientation orientation)
{
var factory = new FrameworkElementFactory(typeof(StackPanel));
factory.SetValue(OrientationProperty, orientation);
itemsControl.ItemsPanel = TemplateGenerator.CreateItemsPanelTemplate(factory);
}
}
public Orientation Orientation
{
get => (Orientation)GetValue(OrientationProperty);
set => SetValue(OrientationProperty, value);
}
}

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