TabControl.SelectedIndex Property

Reference

Definition

Namespace:: System.Windows.Forms

Assembly:: System.Windows.Forms.dll

Source:: TabControl.cs

Source:: TabControl.cs

Source:: TabControl.cs

Important

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Gets or sets the index of the currently selected tab page.

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

[System.ComponentModel.Browsable(false)]
public int SelectedIndex { get; set; }

[<System.ComponentModel.Browsable(false)>]
member this.SelectedIndex : int with get, set

Public Property SelectedIndex As Integer

Property Value

Int32

The zero-based index of the currently selected tab page. The default is -1, which is also the value if no tab page is selected.

Attributes: BrowsableAttribute

Exceptions

ArgumentOutOfRangeException

The value is less than -1.

Examples

The following code example creates a TabControl with two TabPage objects. The SelectedIndex property sets tabPage2 as the currently selected tab page using its index value.

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 );
}

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());
    }
}

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

Applies to

Product	Versions
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
Windows Desktop	3.0, 3.1, 5, 6, 7, 8, 9, 10

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