ComboBox problem! How to show a part of SelectedItem.....

ComboBox problem! How to show a part of SelectedItem.....

• MikeCampbell

  You can use a DataTemplateSelector on combo box to pick a different template for selection area.

  Here is a sample selector:

  public class MyTemplateSelector : DataTemplateSelector
  {
  public override DataTemplate SelectTemplate(object item, DependencyObject container)
  {
  ContentPresenter presenter = (ContentPresenter)container;

  if (presenter.TemplatedParent is ComboBox)
  return (DataTemplate)presenter.FindResource("SelectionTemplate");
  else // Templated parent is ComboBoxItem
  return (DataTemplate)presenter.FindResource("DropDownTemplate");
  }
  }

  XAML:

  <Window x:Class="WindowsApplication.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:local="clr-namespace:WindowsApplication"
  xmlns:sys="clr-namespace:System;assembly=mscorlib"
  SizeToContent="WidthAndHeight">

  <ComboBox Width="200" Height="30">
  <ComboBox.ItemTemplateSelector>
  <local:MyTemplateSelector/>
  </ComboBox.ItemTemplateSelector>
  
  <ComboBox.Resources>
  <!-- Template applied to items in drop down-->
  <DataTemplate x:Key="DropDownTemplate">
  <WrapPanel>
  <CheckBox Width="20" IsChecked="True"/>
  <TextBlock Text="{Binding}"/>
  </WrapPanel>
  </DataTemplate>

  <!-- Template applied to main area -->
  <DataTemplate x:Key="SelectionTemplate">
  <TextBlock Text="{Binding}"/>
  </DataTemplate>
  </ComboBox.Resources>
  
  <sys:String>Hello</sys:String>
  <sys:String>World</sys:String>

  </ComboBox>
  </Window>
  

  
  
  
• ComboBox problem! How to show a part of SelectedItem.....