TabControl.SelectedIndex 属性

获取或设置当前选定的选项卡页的索引。

**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 SelectedIndex As Integer
用法
Dim instance As TabControl
Dim value As Integer

value = instance.SelectedIndex

instance.SelectedIndex = value

public int SelectedIndex { get; set; }

public:
property int SelectedIndex {
    int get ();
    void set (int value);
}

/** @property */
public int get_SelectedIndex ()

/** @property */
public void set_SelectedIndex (int value)

public function get SelectedIndex () : int

public function set SelectedIndex (value : int)

属性值

当前选定的选项卡页的从零开始的索引。默认值为 -1，当未选定任何选项卡页时也为此值。

异常

异常类型	条件
ArgumentOutOfRangeException	值小于 -1。

示例

下面的代码示例创建一个包含两个 TabPage 对象的 TabControl。SelectedIndex 属性使用相应的索引值将 tabPage2 设置成当前选定的选项卡页。

在此示例中使用 System.Drawing 和 System.Windows.Forms 命名空间。

Imports System.Drawing
Imports System.Windows.Forms

Public Class Form1
    Inherits Form
    Private tabControl1 As TabControl
    Private tabPage1 As TabPage
    Private tabPage2 As TabPage

    Private Sub MyTabs()
        Me.tabControl1 = New TabControl()
        Me.tabPage1 = New TabPage()
        Me.tabPage2 = New TabPage()

        Me.tabControl1.Controls.AddRange(New Control() {Me.tabPage1, Me.tabPage2})
        Me.tabControl1.Padding = New Point(15, 10)
        Me.tabControl1.Location = New Point(35, 25)
        Me.tabControl1.Size = New Size(220, 220)

        ' Selects tabPage2 using SelectedIndex.
        Me.tabControl1.SelectedIndex = 1

        Me.tabPage1.Text = "myTabPage1"
        Me.tabPage1.TabIndex = 0

        Me.tabPage2.Text = "myTabPage2"
        Me.tabPage2.TabIndex = 1

        Me.Size = New Size(300, 300)
        Me.Controls.AddRange(New Control() {Me.tabControl1})
    End Sub

    Public Sub New()
        MyTabs()
    End Sub

    Shared Sub Main()
        Application.Run(New Form1())
    End Sub
End Class

using System.Drawing;
using System.Windows.Forms;

public class Form1 : Form
{
    private TabControl tabControl1;
    private TabPage tabPage1;
    private TabPage tabPage2;

    private void MyTabs()
    {
        this.tabControl1 = new TabControl();
        this.tabPage1 = new TabPage();
        this.tabPage2 = new TabPage();

        this.tabControl1.Controls.AddRange(new Control[] {
            this.tabPage1,
            this.tabPage2});
        this.tabControl1.Padding = new Point(15, 10);
        this.tabControl1.Location = new Point(35, 25);
        this.tabControl1.Size = new Size(220, 220);

        // Selects tabPage2 using SelectedIndex.
        this.tabControl1.SelectedIndex = 1;
    
        this.tabPage1.Text = "myTabPage1";
        this.tabPage1.TabIndex = 0;

        this.tabPage2.Text = "myTabPage2";
        this.tabPage2.TabIndex = 1;

        this.Size = new Size(300, 300);
        this.Controls.AddRange(new Control[] {
            this.tabControl1});
    }
    
    public Form1()
    {
        MyTabs();
    }

    static void Main() 
    {
        Application.Run(new Form1());
    }
}

using namespace System::Drawing;
using namespace System::Windows::Forms;
public ref class Form1: public Form
{
private:
   TabControl^ tabControl1;
   TabPage^ tabPage1;
   TabPage^ tabPage2;
   void MyTabs()
   {
      this->tabControl1 = gcnew TabControl;
      this->tabPage1 = gcnew TabPage;
      this->tabPage2 = gcnew TabPage;
      array<Control^>^tabControls = {this->tabPage1,this->tabPage2};
      this->tabControl1->Controls->AddRange( tabControls );
      this->tabControl1->Padding = Point(15,10);
      this->tabControl1->Location = Point(35,25);
      this->tabControl1->Size = System::Drawing::Size( 220, 220 );
      
      // Selects tabPage2 using SelectedIndex.
      this->tabControl1->SelectedIndex = 1;
      this->tabPage1->Text = "myTabPage1";
      this->tabPage1->TabIndex = 0;
      this->tabPage2->Text = "myTabPage2";
      this->tabPage2->TabIndex = 1;
      this->Size = System::Drawing::Size( 300, 300 );
      array<Control^>^formControls = {this->tabControl1};
      this->Controls->AddRange( formControls );
   }


public:
   Form1()
   {
      MyTabs();
   }

};

int main()
{
   Application::Run( gcnew Form1 );
}

import System.Drawing.*;
import System.Windows.Forms.*;

public class Form1 extends Form
{
    private TabControl tabControl1;
    private TabPage tabPage1;
    private TabPage tabPage2;

    private void MyTabs()
    {
        this.tabControl1 = new TabControl();
        this.tabPage1 = new TabPage();
        this.tabPage2 = new TabPage();

        this.tabControl1.get_Controls().AddRange(new Control[] { this.
            tabPage1, this.tabPage2 });
        this.tabControl1.set_Padding(new Point(15, 10));
        this.tabControl1.set_Location(new Point(35, 25));
        this.tabControl1.set_Size(new Size(220, 220));
        // Selects tabPage2 using SelectedIndex.
        this.tabControl1.set_SelectedIndex(1);
        this.tabPage1.set_Text("myTabPage1");
        this.tabPage1.set_TabIndex(0);
        this.tabPage2.set_Text("myTabPage2");
        this.tabPage2.set_TabIndex(1);
        this.set_Size(new Size(300, 300));
        this.get_Controls().AddRange(new Control[] { this.tabControl1 });
    } //MyTabs

    public Form1()
    {
        MyTabs();
    } //Form1

    public static void main(String[] args)
    {       
        Application.Run(new Form1());
    } //main
} //Form1

平台

Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、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

.NET Compact Framework

受以下版本支持：2.0、1.0

请参见

参考

TabControl 类
TabControl 成员
System.Windows.Forms 命名空间
TabPage
DeselectTab
SelectTab
SelectedTab
Deselecting
Deselected
Selecting
Selected