TabControl.TabPageCollection.IndexOf(TabPage) Method
Definition
Important
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Returns the index of the specified tab page in the collection.
public:
int IndexOf(System::Windows::Forms::TabPage ^ page);
public int IndexOf (System.Windows.Forms.TabPage page);
member this.IndexOf : System.Windows.Forms.TabPage -> int
Public Function IndexOf (page As TabPage) As Integer
Parameters
Returns
The zero-based index of the tab page; -1 if it cannot be found.
Exceptions
The value of page
is null
.
Examples
The following code example creates a TabControl with one TabPage. This example uses the IndexOf method to retrieve the tabPage1
index value. A ToolTip is used to display this value.
using namespace System::Drawing;
using namespace System::Windows::Forms;
public ref class Form1: public Form
{
private:
TabControl^ tabControl1;
TabPage^ tabPage1;
public:
Form1()
{
this->tabControl1 = gcnew TabControl;
this->tabPage1 = gcnew TabPage( "myTabPage" );
this->tabControl1->TabPages->Add( tabPage1 );
this->tabControl1->ShowToolTips = true;
this->tabControl1->Location = Point(25,25);
this->tabControl1->Size = System::Drawing::Size( 250, 250 );
this->tabPage1->ToolTipText = System::String::Concat( "TabIndex = ", (tabControl1->TabPages->IndexOf( tabPage1 )).ToString() );
// Gets the tabPage1 TabIndex value from the tabControl1 controls collection.
// Converts the tabPage1 TabIndex value to a string.
this->ClientSize = System::Drawing::Size( 300, 300 );
this->Controls->Add( tabControl1 );
}
};
int main()
{
Application::Run( gcnew Form1 );
}
using System.Drawing;
using System.Windows.Forms;
public class Form1 : Form
{
private TabControl tabControl1;
private TabPage tabPage1;
public Form1()
{
this.tabControl1 = new TabControl();
this.tabPage1 = new TabPage("myTabPage");
this.tabControl1.TabPages.Add(tabPage1);
this.tabControl1.ShowToolTips = true;
this.tabControl1.Location = new Point(25, 25);
this.tabControl1.Size = new Size(250, 250);
this.tabPage1.ToolTipText = "TabIndex = " +
// Gets the tabPage1 TabIndex value from the tabControl1 controls collection.
// Converts the tabPage1 TabIndex value to a string.
(tabControl1.TabPages.IndexOf(tabPage1)).ToString();
this.ClientSize = new Size(300, 300);
this.Controls.Add(tabControl1);
}
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
Public Sub New()
Me.tabControl1 = New TabControl()
Me.tabPage1 = New TabPage("myTabPage")
Me.tabControl1.Controls.Add(tabPage1)
Me.tabControl1.ShowToolTips = True
Me.tabControl1.Location = New Point(25, 25)
Me.tabControl1.Size = New Size(250, 250)
' Gets the tabPage1 TabIndex value from the tabControl1 controls collection.
' Converts the tabPage1 TabIndex value to a string.
Me.tabPage1.ToolTipText = "TabIndex = " + tabControl1.TabPages.IndexOf(tabPage1).ToString()
Me.ClientSize = New Size(300, 300)
Me.Controls.Add(tabControl1)
End Sub
Shared Sub Main()
Application.Run(New Form1())
End Sub
End Class
Applies to
See also
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