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POIn WPF how do I bind a combobox to TabControl Items?
 

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  1. POIn WPF how do I bind a combobox to TabControl Items?
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    <p>I am learning WPF and I have a question about binding a ComboBox</p> <p>I have a simple WPF window with the following controls: a ComboBox at the top, and a TabControl under it.</p> <p>I populate the tabcontrol with two standard TabItems. Then I add a few more tabs to it - however these are of my own "MyTab" class that simply inherits TabItem. I'm not overriding anything or doing anything exotic, I just added a few public properties.</p> <p>I want to use the ComboBox as a navigation tool. Each tab has a header, and that same header should become an item in the ComboBox. If selected out of the ComboBox, it should make that corresponding tab the active one.</p> <p>Here is my setup on the ComboBox:</p> <pre><code> &lt;Window.Resources&gt; &lt;DataTemplate x:Key="EmployeeListTemplate"&gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;TextBlock Text="{Binding Path=Header}" /&gt; &lt;/StackPanel&gt; &lt;/DataTemplate&gt; &lt;/Window.Resources&gt; </code></pre> <p>.. and then further down in the Xaml ...</p> <pre><code>&lt;ComboBox Grid.Row="1" Width="500" Name="qlist" ItemsSource="{Binding ElementName=tabControl1, Path=Items}" ItemTemplate="{StaticResource EmployeeListTemplate}" /&gt; </code></pre> <p>So I am just binding to the TabControl's Item collection and picking Header as the SelectedItem's property to display.</p> <p>It works, and when I click the ComboBox, the headers are indeed displayed as individual text items. But when I make an actual selection, that tab itself gets rendered in the selection area of that combobox!</p> <p>How do I fix this? Why does it use the Header property for the list, but when I pick from the list, the value it displays becomes the actual TabItem object? I feel like I'm missing something obvious</p> <p>By the way, I know I said I want to use this to control navigation, but I stripped all of that out and I will worry about it after I figure out this maddening thing.</p> <p><img src="https://i.stack.imgur.com/xO8ti.png" alt="Showing proper items in combobox"></p> <p>Look carefully - when I pick tabItem1 from the combobox, it actually re-rendered that tab item inside the control. You can see the top part of it, surrounded by the standard blue selection background a list item uses. maddening.</p> <p><img src="https://i.stack.imgur.com/cAZqs.png" alt="tabItem painting in combobox"></p> <p>What am I doing wrong here? Thanks for any help</p>
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    1. USJohn Doh
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    1. COThis is an actual bug in WPF. There is a solution to it, it is posted here: http://stackoverflow.com/questions/546119/controlling-the-tabcontrol-active-tab-with-a-combobox
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      1. POIn WPF how do I bind a combobox to TabControl Items?
      1. USZanderAdam
    2. COThat is extremely helpful! Thank you! In the meantime, I redid this with a Listbox instead, and it works fine. Including two-way binding, so I can select the active tab from either the tab control, or the list. That was driving me nuts. Thanks for giving me another reference
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      1. USJohn Doh
 

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