TabControl.TabPageCollection.IndexOf(TabPage) TabControl.TabPageCollection.IndexOf(TabPage) TabControl.TabPageCollection.IndexOf(TabPage) TabControl.TabPageCollection.IndexOf(TabPage) Method

Definizione

Restituisce l'indice della scheda specificata nell'insieme.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

Parametri

page
TabPage TabPage TabPage TabPage

Oggetto TabPage da individuare nella raccolta.The TabPage to locate in the collection.

Restituisce

Indice in base zero della scheda; -1 se non è possibile trovarlo.The zero-based index of the tab page; -1 if it cannot be found.

Eccezioni

Il valore della proprietà page è null.The value of page is null.

Esempi

Nell'esempio di codice seguente viene TabControl creato un TabPageoggetto con uno.The following code example creates a TabControl with one TabPage. In questo esempio viene IndexOf usato il metodo per tabPage1 recuperare il valore di indice.This example uses the IndexOf method to retrieve the tabPage1 index value. Viene usata una descrizione comando per visualizzare questo valore.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

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