I have control template with a checkbox as this:
<Style x:Key="GeneralChkbxItemStyle" TargetType="ListBoxItem">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListBoxItem">
<Grid x:Name="RootElement">
<CheckBox ClickMode="Press" Content="{Binding Path=Name}"
IsChecked="{Binding Path=IsSelected, Mode=TwoWay}" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter
</Style>
I use this in a combobox and a listbox mentioning like this ItemContainerStyle="{StaticResource GeneralChkbxItemStyle .It works perfect when the datasource has a property named Name .
But I am wondering how can I use this template with other data source having class which does not have a name property . It might have a property name2, or name 3 etc depending on the datasource.
Any suggestions? Thanks.
In your template:
<CheckBox ClickMode="Press"
Content="{TemplateBinding Content}"
ContentTemplate="{templateBinding ContentTemplate}"
IsChecked="{Binding Path=IsSelected, Mode=TwoWay}" />
Then in your view:
<ListBox DisplayMemberPath="Name"..../>
<!--OR-->
<ListBox DisplayMemberPath="Name2"..../>
<!--OR-->
......
You may use implicit data templates.
<DataTemplate DataType="MyApp:Person">
<TextBlock Text="{Binding Name}" />
</DataTemplate>
<DataTemplate DataType="MyApp:Booking">
<TextBlock Text="{Binding Id}" />
</DataTemplate>
<Style x:Key="GeneralChkbxItemStyle"
TargetType="ListBoxItem">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListBoxItem">
<Grid x:Name="RootElement">
<CheckBox ClickMode="Press"
Content="{Binding .}"
IsChecked="{Binding Path=IsSelected, Mode=TwoWay}" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Related
I have an issue with selecting part of the text in TextBox. I cannot understand why, I can select just one character at a time and I can select as many as I want with the keyboard (shift+arrow). This is my code:
<Style TargetType="{x:Type local:EditableTextBlock}">
<Setter Property="FocusVisualStyle"
Value="{x:Null}" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:EditableTextBlock}">
<Grid Background="{TemplateBinding Background}">
<Grid.Resources>
<BooleanToVisibilityConverter x:Key="bool2Vis" />
<local:BooleanToInverseVisibilityConverter x:Key="bool2InverseVis" />
</Grid.Resources>
<TextBox x:Name="textbox"
Visibility="{Binding IsInEditMode, RelativeSource={RelativeSource Mode=TemplatedParent}, Converter={StaticResource bool2Vis}}"
TextWrapping="{TemplateBinding TextWrapping}"
Text="{Binding Text, Mode=TwoWay, UpdateSourceTrigger=LostFocus, RelativeSource={RelativeSource Mode=TemplatedParent}}" IsHitTestVisible="True" Focusable="True"/>
<ContentControl x:Name="textblockContainer"
Visibility="{Binding IsInEditMode, RelativeSource={RelativeSource Mode=TemplatedParent}, Converter={StaticResource bool2InverseVis}}">
<TextBlock x:Name="textblock"
Text="{TemplateBinding Text}"
TextWrapping="{TemplateBinding TextWrapping}"
TextTrimming="CharacterEllipsis"/>
</ContentControl>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Any help will be appreciated.
Thanks in advance.
I have created a listbox of expanders like this question: Expander Auto Open/Close
The solution works with content in the expanders when the listbox is the only item on the window.
But when I try to use the same code with my custom control, I'm getting this error:
System.Windows.Data Error: 4 : Cannot find source for binding with
reference 'RelativeSource FindAncestor,
AncestorType='System.Windows.Controls.ListBoxItem',
AncestorLevel='1''. BindingExpression:Path=IsSelected; DataItem=null;
target element is 'Expander' (Name=''); target property is
'IsExpanded' (type 'Boolean')
I've tried adding the IsSelected Property in the ListBox.ItemContainerStyle as one poster suggested in another thread but that failed.
<ListBox Margin="5"
SelectionMode="Single"
ScrollViewer.VerticalScrollBarVisibility="Auto">
<ListBox.Resources>
<Style TargetType="{x:Type Expander}">
<Setter Property="IsExpanded"
Value="{Binding Path=IsSelected, RelativeSource={RelativeSource AncestorType={x:Type ListBoxItem}}}" />
</Style>
<Style TargetType="{x:Type controls:SelectionCriteriaControl}">
<Setter Property="MaxHeight"
Value="200" />
</Style>
</ListBox.Resources>
<Expander Header="Fund Family" Margin="2">
<StackPanel>
<controls:SelectionCriteriaControl DataContext="{Binding FundFamilySelectionCriteria, Mode=TwoWay}" />
</StackPanel>
</Expander>
<Expander Header="Asset Class" Margin="2">
<StackPanel>
<controls:SelectionCriteriaControl DataContext="{Binding AssetClassSelectionCriteria, Mode=TwoWay}" />
</StackPanel>
</Expander>
<ListBox.Template>
<ControlTemplate TargetType="{x:Type ListBox}">
<ItemsPresenter />
</ControlTemplate>
</ListBox.Template>
<ListBox.ItemContainerStyle>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListBoxItem}">
<ContentPresenter Content="{TemplateBinding Content}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
Fails miserably!!!!!
Any help appreciated :)
It's a bit of a large scenario for me to set up at the moment, but something that comes to mind to try:
Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=IsSelected}" />
I don't think where templates are used that you can define relative sources by type.
Edit: This code worked fine: Based on your original, the TemplatedParent wasn't necessary.
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition Height="auto"/>
</Grid.RowDefinitions>
<ListBox x:Name="testList" Margin="5"
SelectionMode="Single"
ScrollViewer.VerticalScrollBarVisibility="Auto">
<ListBox.Resources>
<Style TargetType="{x:Type Expander}">
<Setter Property="IsExpanded"
Value="{Binding Path=IsSelected, RelativeSource={RelativeSource AncestorType={x:Type ListBoxItem}}}" />
</Style>
</ListBox.Resources>
<Expander Header="Fund Family" Margin="2">
<StackPanel>
<TextBlock Text="First"/>
<TextBlock Text="Second"/>
</StackPanel>
</Expander>
<Expander Header="Asset Class" Margin="2">
<StackPanel>
<TextBlock Text="First"/>
<TextBlock Text="Second"/>
</StackPanel>
</Expander>
<ListBox.Template>
<ControlTemplate TargetType="{x:Type ListBox}">
<ItemsPresenter />
</ControlTemplate>
</ListBox.Template>
<ListBox.ItemContainerStyle>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListBoxItem}">
<ContentPresenter Content="{TemplateBinding Content}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
<Button HorizontalAlignment="Left" Content="Test" Grid.Row="1" Width="60" Click="Button_Click"/>
</Grid>
And a quick code-behind to trigger a programmatic SelectedIndex set...
private void Button_Click(object sender, RoutedEventArgs e)
{
testList.SelectedIndex = 1;
}
Seems to work fine for me. Clicking on a list item expands, and even using the button to set it specifically by setting the selected index it expands. Something very fishy is affecting your specific scenario... :]
TL;DR - I had a binding error. Tired eyes miss things.
I have implemented a multi-select CheckBox list using a ListBox as the container. Now, beside each checkbox in the list I want to display an image whose visbility is bound to a ViewModel property, but I'm having difficulty doing this.
My styles are:
<Grid.Resources>
<Style x:Key="ListBoxCheckStyle" TargetType="ListBox">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListBox">
<ItemsPresenter HorizontalAlignment="Left" VerticalAlignment="Top"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<ItemsPanelTemplate x:Key="ListBoxCheckStyleItemsPanelTemplate">
<StackPanel />
</ItemsPanelTemplate>
<Style x:Key="ListBoxItemCheckStyle" TargetType="ListBoxItem">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListBoxItem">
<StackPanel Orientation="Horizontal">
<ChimeControls:CheckBox
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
Margin="0,0,10,0"
IsChecked="{Binding IsSelected, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}"/>
<Image
Width="16"
Height="16"
VerticalAlignment="Center"
Source="{StaticResource OccurredStatusTypeImageSource}"
Visibility="{Binding HasConsentCondition, Converter={StaticResource BoolToVisibilityConverter}, FallbackValue=Collapsed}"
HorizontalAlignment="Right"
Margin="10,0,10,0" />
</StackPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Grid.Resources>
My Listbox is defined as:
<ListBox
x:Name="objectivesListBox"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Style="{StaticResource ListBoxCheckStyle}"
ItemsPanel="{StaticResource ListBoxCheckStyleItemsPanelTemplate}"
ItemContainerStyle="{StaticResource ListBoxItemCheckStyle}"
ItemsSource="{Binding ObjectivesList}"
DisplayMemberPath="mgt_plan_obj_name"
AttachedProperties:ListBoxSelectedItems.Items="{Binding SelectedObjectives, Mode=TwoWay}"
SelectionMode="Multiple"/>
My image never displays though, and the getter of the property the Visibility is bound to is never called. What am I missing?
As suggested by nemesv, I checked my output window again and there was my binding error.
I have a TreeView in WPF which I have bound to a collection of categories that itself contains a collection of categories and son on and so forth. Currently, I'm binding the collection successfully and having all of my category names appearing. However, I also have an IsExpanded property on my collection objects that when all set to true only expand the first TreeViewItem but no subsequent ones.
Does anyone know what may be wrong with my TreeView styles?
<HierarchicalDataTemplate x:Key="menuHierarchicalTemplate" ItemsSource="{Binding Path=SubCategories, Mode=TwoWay}" >
<Border x:Name="treeViewItemBorder"
CornerRadius="3"
MinWidth="125"
BorderBrush="Silver" Background="Transparent">
<StackPanel Orientation="Horizontal" >
<TextBlock Height="24" Padding="5" Text="{Binding Path=Name}" />
</StackPanel>
</Border>
</HierarchicalDataTemplate>
<Style x:Key="treeViewItemStyle" TargetType="TreeViewItem">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TreeViewItem">
<TreeViewItem IsExpanded="{Binding Path=IsExpanded, Mode=TwoWay}"
ItemsSource="{Binding Path=SubCategories}"
ItemTemplate="{StaticResource menuHierarchicalTemplate}" >
<TreeViewItem.Header>
<StackPanel Orientation="Horizontal" >
<TextBlock Height="24" FontSize="12" Padding="5" Text="{Binding Path=Name}" />
</StackPanel>
</TreeViewItem.Header>
</TreeViewItem>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<TreeView Name="menuTreeView"
Background="Transparent"
BorderBrush="Transparent"
VerticalAlignment="Stretch"
HorizontalAlignment="Stretch"
Margin="10"
ItemContainerStyle="{StaticResource treeViewItemStyle}">
</TreeView>
Thanks,
Xam
You are applying the "treeViewItemStyle" only to the first level of items in the TreeView. You have to set it as well as the ItemContainerStyle of the TreeViewItems. So, in your ControlTemplate, you'll need something like:
<ControlTemplate TargetType="TreeViewItem">
<TreeViewItem ItemContainerStyle="{StaticResource treeViewItemStyle}".../>
</ControlTemplate>
Better yet, you can just remove the "x:Key" attribute in your Style declaration. Doing so will automatically apply the style to all TreeViewItems.
SIDE NOTE:
I would suggest that instead of overriding the ControlTemplate like what you did above, just use property Setters in the Style instead. Something like:
<Style TargetType="TreeViewItem">
<Setter Property="IsExpanded" Value="{Binding Path=IsExpanded, Mode=TwoWay}"/>
<Setter Property="ItemsSource" Value="{Binding Path=SubCategories}"/>
<Setter Property="ItemTemplate" Value="{StaticResource menuHierarchicalTemplate}"/>
<Setter Property="Header">
<Setter.Value>
<StackPanel Orientation="Horizontal" >
<TextBlock Height="24" FontSize="12" Padding="5" Text="{Binding Path=Name}" />
</StackPanel>
</Setter.Value>
</Setter>
</Style>
It's quite unusual to use the same Control as part of the ControlTemplate of itself (i.e. using TreeViewItem in the ControlTemplate of a TreeViewItem).
I use this style for all my labels
<Style TargetType="Label" x:Key="LabelStyle">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Label">
<StackPanel Orientation="Horizontal" >
<TextBox Loaded="MyTextBlock_Loaded" x:Name="EditControl" Visibility="Collapsed" Text="{TemplateBinding Tag}" />
<Label Content="{TemplateBinding Content}" Grid.Column="1" Grid.Row="1">
</Label>
</StackPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
and my sample label
<Label Grid.Column="0" Grid.Row="0" Content="Photo" Style="{StaticResource LabelStyle}" Tag="{Binding fieldsCode.firstName, UpdateSourceTrigger=PropertyChanged}"/>
But I feel that TemplateBiding doesn't support update of property. How can solve this issue
Try this for two-way binding
Text="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Tag, Mode=TwoWay}"
If you want a one-way binding from within the ControlTemplate to a property of its templated parent, use {TemplateBinding}. For all other scenarios use {Binding} instead:
<TextBox Loaded="MyTextBlock_Loaded" x:Name="EditControl" Visibility="Collapsed" Text="{Binding Tag, Mode=TwoWay}" />