mirror of
https://github.com/Stone-Red-Code/docs-desktop.git
synced 2026-09-04 09:06:04 +02:00
Andy De George
da363692ff
* Reset branch for WPF changes * Convert BMP to PNG; fix link-out-of-scope err * Add snippets for WPF... 6794 files!!!! * Add missing snippets * update file updated between migration * Fix paths to include * update breadcrumb and toc * fix index links * fix index links * fix index links * fix markdown
41 lines
3.7 KiB
Markdown
41 lines
3.7 KiB
Markdown
---
|
|
title: "How to: Use SelectedValue, SelectedValuePath, and SelectedItem"
|
|
description: Learn how to use the SelectedValue and SelectedValuePath properties to specify a value for the SelectedItem of a Windows Presentation Foundation TreeView.
|
|
ms.date: "03/30/2017"
|
|
helpviewer_keywords:
|
|
- "TreeView control [WPF], SelectedValue properties"
|
|
- "Control class [WPF], SelectedItem properties"
|
|
- "Control class [WPF], TreeView properties"
|
|
- "Control class [WPF], SelectedValue properties"
|
|
- "TreeView control [WPF], SelectedItem properties"
|
|
- "SelectedValue [WPF], SelectedValuePath properties"
|
|
- "TreeView control [WPF], SelectedValuePath properties"
|
|
- "Control class [WPF], SelectedValuePath properties"
|
|
- "SelectedValue [WPF], SelectedItem properties"
|
|
ms.assetid: 2fc92ad4-f02c-4f89-bbe9-d4978a7af0db
|
|
---
|
|
# How to: Use SelectedValue, SelectedValuePath, and SelectedItem
|
|
This example shows how to use the <xref:System.Windows.Controls.TreeView.SelectedValue%2A> and <xref:System.Windows.Controls.TreeView.SelectedValuePath%2A> properties to specify a value for the <xref:System.Windows.Controls.TreeView.SelectedItem%2A> of a <xref:System.Windows.Controls.TreeView>.
|
|
|
|
## Example
|
|
The <xref:System.Windows.Controls.TreeView.SelectedValuePath%2A> property provides a way to specify a <xref:System.Windows.Controls.TreeView.SelectedValue%2A> for the <xref:System.Windows.Controls.TreeView.SelectedItem%2A> in a <xref:System.Windows.Controls.TreeView>. The <xref:System.Windows.Controls.TreeView.SelectedItem%2A> represents an object in the <xref:System.Windows.Controls.ItemsControl.Items%2A> collection and the <xref:System.Windows.Controls.TreeView> displays the value of a single property of the selected item. The <xref:System.Windows.Controls.TreeView.SelectedValuePath%2A> property specifies the path to the property that is used to determine the value of the <xref:System.Windows.Controls.TreeView.SelectedValue%2A> property. The examples in this topic illustrate this concept.
|
|
|
|
The following example shows an <xref:System.Windows.Data.XmlDataProvider> that contains employee information.
|
|
|
|
[!code-xaml[TreeViewSelectedValue#XMLDataProvider](~/samples/snippets/csharp/VS_Snippets_Wpf/TreeViewSelectedValue/CS/Window1.xaml#xmldataprovider)]
|
|
|
|
The following example defines a <xref:System.Windows.HierarchicalDataTemplate> that displays the `EmployeeName` and `EmployeeWorkDay` of the `Employee`. Note that the <xref:System.Windows.HierarchicalDataTemplate> does not specify the `EmployeeNumber` as part of the template.
|
|
|
|
[!code-xaml[TreeViewSelectedValue#HierarchicalDataTemplate](~/samples/snippets/csharp/VS_Snippets_Wpf/TreeViewSelectedValue/CS/Window1.xaml#hierarchicaldatatemplate)]
|
|
|
|
The following example shows a <xref:System.Windows.Controls.TreeView> that uses the previously defined <xref:System.Windows.HierarchicalDataTemplate> and that sets the <xref:System.Windows.Controls.TreeView.SelectedValue%2A> property to the `EmployeeNumber`. When you select an `EmployeeName` in the <xref:System.Windows.Controls.TreeView>, the <xref:System.Windows.Controls.TreeView.SelectedItem%2A> property returns the `EmployeeInfo` data item that corresponds to the selected `EmployeeName`. However, because the <xref:System.Windows.Controls.TreeView.SelectedValuePath%2A> of this <xref:System.Windows.Controls.TreeView> is set to `EmployeeNumber`, the <xref:System.Windows.Controls.TreeView.SelectedValue%2A> is set to the `EmployeeNumber`.
|
|
|
|
[!code-xaml[TreeViewSelectedValue#SelectedValuePath](~/samples/snippets/csharp/VS_Snippets_Wpf/TreeViewSelectedValue/CS/Window1.xaml#selectedvaluepath)]
|
|
|
|
## See also
|
|
|
|
- <xref:System.Windows.Controls.TreeView>
|
|
- <xref:System.Windows.Controls.TreeViewItem>
|
|
- [TreeView Overview](treeview-overview.md)
|
|
- [How-to Topics](treeview-how-to-topics.md)
|