TreeView.HideSelection 属性

获取或设置一个值，用以指示选定的树节点是否即使在树视图已失去焦点时仍会保持突出显示。

**命名空间:**System.Windows.Forms
**程序集:**System.Windows.Forms（在 system.windows.forms.dll 中）

语法

声明
Public Property HideSelection As Boolean
用法
Dim instance As TreeView
Dim value As Boolean

value = instance.HideSelection

instance.HideSelection = value

public bool HideSelection { get; set; }

public:
property bool HideSelection {
    bool get ();
    void set (bool value);
}

/** @property */
public boolean get_HideSelection ()

/** @property */
public void set_HideSelection (boolean value)

public function get HideSelection () : boolean

public function set HideSelection (value : boolean)

属性值

如果选定的树节点在树视图已失去焦点时不突出显示，则为 true；否则为 false。默认为 true。

备注

如果该属性设置为 false，在 TreeView 控件没有焦点时，TreeView 控件中的选定节点仍会突出显示，使用的颜色会不同于当前选择的颜色。使用该属性，可使用户选定的项在用户单击窗体上的其他控件或移动至其他窗口时，保持可见状态。

提示

如果关心应用程序的辅助功能，建议将 HideSelection 属性设置为 false。

示例

下面的代码示例演示如何使用 HideSelection 属性。若要运行此示例，请将以下代码粘贴到一个窗体中，并从该窗体的构造函数或 Load 事件处理程序中调用 InitializeSelectedTreeView 方法。

' Declare the TreeView control.
Friend WithEvents TreeView2 As System.Windows.Forms.TreeView

' Initialize the TreeView to blend with the form, giving it the 
' same color as the form and no border.
Private Sub InitializeSelectedTreeView()

    ' Create a new TreeView control and set the location and size.
    Me.TreeView2 = New System.Windows.Forms.TreeView
    Me.TreeView2.Location = New System.Drawing.Point(72, 48)
    Me.TreeView2.Size = New System.Drawing.Size(200, 200)
    Me.TreeView2.BorderStyle = BorderStyle.Fixed3D
   
    ' Set the HideSelection property to false to keep the 
    ' selection highlighted when the user leaves the control. 
    Me.TreeView2.HideSelection = False

    ' Add the nodes.
    Me.TreeView2.Nodes.AddRange(New System.Windows.Forms.TreeNode() _
        {New System.Windows.Forms.TreeNode("Features", _
        New System.Windows.Forms.TreeNode() _
        {New System.Windows.Forms.TreeNode("Full Color"), _
        New System.Windows.Forms.TreeNode("Project Wizards"), _
        New System.Windows.Forms.TreeNode("Visual C# and Visual Basic Support")}), _
        New System.Windows.Forms.TreeNode("System Requirements", _
        New System.Windows.Forms.TreeNode() _
        {New System.Windows.Forms.TreeNode _
        ("Pentium 133 MHz or faster processor "), _
        New System.Windows.Forms.TreeNode("Windows 98 or later"), _
        New System.Windows.Forms.TreeNode("100 MB Disk space")})})

    ' Set the tab index and add the TreeView to the form.
    Me.TreeView2.TabIndex = 0
    Me.Controls.Add(Me.TreeView2)
End Sub

// Declare the TreeView control.
internal System.Windows.Forms.TreeView TreeView2;

// Initialize the TreeView to blend with the form, giving it the 
// same color as the form and no border.
private void InitializeSelectedTreeView()
{

    // Create a new TreeView control and set the location and size.
    this.TreeView2 = new System.Windows.Forms.TreeView();
    this.TreeView2.Location = new System.Drawing.Point(72, 48);
    this.TreeView2.Size = new System.Drawing.Size(200, 200);

    this.TreeView2.BorderStyle = BorderStyle.Fixed3D;
    
    // Set the HideSelection property to false to keep the 
    // selection highlighted when the user leaves the control. 
    // This helps it blend with form.
    this.TreeView2.HideSelection = false;

    // Add the nodes.
    this.TreeView2.Nodes.AddRange(new TreeNode[]
        {new TreeNode("Features", 
            new TreeNode[]{
            new TreeNode("Full Color"), 
            new TreeNode("Project Wizards"), 
            new TreeNode("Visual C# and Visual Basic Support")}), 
            new TreeNode("System Requirements", 
            new TreeNode[]{
                new TreeNode("Pentium 133 MHz or faster processor "),
                new TreeNode("Windows 98 or later"), 
                new TreeNode("100 MB Disk space")})
        });

    // Set the tab index and add the TreeView to the form.
    this.TreeView2.TabIndex = 0;
    this.Controls.Add(this.TreeView2);
}

// Declare the TreeView control.
System.Windows.Forms.TreeView treeView2;

// Initialize the TreeView to blend with the form, giving it the 
// same color as the form and no border.
private void InitializeSelectedTreeView()
{
    // Create a new TreeView control and set the location and size.
    this.treeView2 = new System.Windows.Forms.TreeView();
    this.treeView2.set_Location(new System.Drawing.Point(72, 48));
    this.treeView2.set_Size(new System.Drawing.Size(200, 200));
    
    // Set the BorderStyle property to none, the BackColor property to
    // the form's backcolor, and the Scrollable property to false.  
    // This allows the TreeView to blend in form.
    this.treeView2.set_BorderStyle(BorderStyle.Fixed3D);
           
    // Set the HideSelection property to false to keep the 
    // selection highlighted when the user leaves the control. 
    this.treeView2.set_HideSelection(false);
   
    // Add the nodes.
    this.treeView2.get_Nodes().AddRange(
        new TreeNode[] {new TreeNode("Features",
        new TreeNode[] { new TreeNode("Full Color"),
        new TreeNode("Project Wizards"),
        new TreeNode("Visual C# and Visual Basic Support") }),
        new TreeNode("System Requirements",
        new TreeNode[] {
        new TreeNode("Pentium 133 MHz or faster processor "),
        new TreeNode("Windows 98 or later"),
        new TreeNode("100 MB Disk space") }) });
    
    // Set the tab index and add the TreeView to the form.
    this.treeView2.set_TabIndex(0);
    this.get_Controls().Add(this.treeView2);
} 

平台

Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

版本信息

.NET Framework

受以下版本支持：2.0、1.1、1.0

请参见

参考

TreeView 类
TreeView 成员
System.Windows.Forms 命名空间
SelectedNode