| title | description | ms.date | dev_langs | helpviewer_keywords | ms.assetid | ||||
|---|---|---|---|---|---|---|---|---|---|
How to: Find DataTemplate-Generated Elements |
Learn how to find elements that are generated by a DataTemplate with several provided code examples. |
03/30/2017 |
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bfcd564e-5e9e-451e-8641-a9b5c3cfac90 |
This example shows how to find elements that are generated by a xref:System.Windows.DataTemplate.
In this example, there is a xref:System.Windows.Controls.ListBox that is bound to some XML data:
[!code-xamlFindGeneratedItems#LB]
The xref:System.Windows.Controls.ListBox uses the following xref:System.Windows.DataTemplate:
[!code-xamlFindGeneratedItems#DT]
If you want to retrieve the xref:System.Windows.Controls.TextBlock element generated by the xref:System.Windows.DataTemplate of a certain xref:System.Windows.Controls.ListBoxItem, you need to get the xref:System.Windows.Controls.ListBoxItem, find the xref:System.Windows.Controls.ContentPresenter within that xref:System.Windows.Controls.ListBoxItem, and then call xref:System.Windows.FrameworkTemplate.FindName%2A on the xref:System.Windows.DataTemplate that is set on that xref:System.Windows.Controls.ContentPresenter. The following example shows how to perform those steps. For demonstration purposes, this example creates a message box that shows the text content of the xref:System.Windows.DataTemplate-generated text block.
[!code-csharpFindGeneratedItems#DTFindElement] [!code-vbFindGeneratedItems#DTFindElement]
The following is the implementation of FindVisualChild, which uses the xref:System.Windows.Media.VisualTreeHelper methods:
[!code-csharpFindGeneratedItems#FVC] [!code-vbFindGeneratedItems#FVC]