Bind TextBlock in DataTemplate (resource) to Content of checked radio button
I have a TextBlock in resource data template:
<DataTemplate x:Key="MyDataTemplate" ItemsSource="{Binding MySource}">
<TextBlock x:Name="MyText" Text="{Binding ???}" />
</DataTemplate>
that I want to bind with Content
of checked radio button:
<RadioButton GroupName="MyGroup" Content="Code" />
<RadioButton GroupName="MyGroup" Content="Description" />
if Code radio button is selected, t开发者_Go百科hen I want the text become Text={Binding Code}
.
Please help, thank you.
Assuming this is backed by a viewmodel, you would set up your viewmodel thusly:
bool isCodeChecked;
public bool IsCodeChecked
{
get { return isCodeChecked; }
set
{
if(value == isCodeChecked) return;
isCodeChecked = value;
// raise notification that ***MyText*** property has changed (INotifyPropertyChanged interface)
}
public string MyText
{
get { return IsCodeChecked ? "Code" : "Description"; }
}
Then set up your XAML:
<RadioButton GroupName="MyGroup" Content="Code" IsChecked="{Binding IsCodeChecked, Mode=OneWayToSource}" />
<DataTemplate x:Key="MyDataTemplate" ItemsSource="{Binding MySource}">
<TextBlock x:Name="MyText" Text="{Binding MyText}" />
</DataTemplate>
The binding on the CheckBox
will cause the boolean property on the viewmodel to be updated, which in turn will notify the textbox to update its bound value.
I created 2 DataTamplate in resources, and I switch my TreeView's ItemTemplate from code behind
if (ViewByCodeRadioButton.IsChecked == true)
MyTreeView.ItemTemplate = Resources["MyDataTemplateCode"] as DataTemplate;
else
MyTreeView.ItemTemplate = Resources["MyDataTemplateDesc"] as DataTemplate;
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