TabControl.TabPageCollection.Contains(TabPage) Método

Definición

Espacio de nombres:
System.Windows.Forms
Ensamblado:
System.Windows.Forms.dll

Determina si una página de tabulación especificada está en la colección.

public:
 bool Contains(System::Windows::Forms::TabPage ^ page);
public bool Contains(System.Windows.Forms.TabPage page);
member this.Contains : System.Windows.Forms.TabPage -> bool
Public Function Contains (page As TabPage) As Boolean

Parámetros

page
TabPage

que TabPage se va a buscar en la colección.

Devoluciones

Boolean

true es si el objeto especificado TabPage está en la colección; en caso contrario, falsees .

Excepciones

ArgumentNullException

El valor de page es null.

Ejemplos

En el ejemplo de código siguiente se crea inicialmente un TabControl objeto con tres TabPage objetos . El método agrega directamente las dos primeras páginas de tabulación.tabControl1AddRange El Contains método determina tabPage3 que forma parte de la tabControl1 colección de controles. Dado que tabPage3 no se encontró en esta colección, se agregó mediante el Add método .

using namespace System::Drawing;
using namespace System::Windows::Forms;
public ref class Form1: public Form
{
private:
   TabControl^ tabControl1;
   TabPage^ tabPage1;
   TabPage^ tabPage2;
   TabPage^ tabPage3;

public:
   Form1()
   {
      this->tabControl1 = gcnew TabControl;
      array<System::String^>^tabText = {"tabPage1","tabPage2","tabPage3"};
      this->tabPage1 = gcnew TabPage( tabText[ 0 ]->ToString() );
      this->tabPage2 = gcnew TabPage( tabText[ 1 ]->ToString() );
      this->tabPage3 = gcnew TabPage( tabText[ 2 ]->ToString() );
      
      // Populates the tabControl1 with two tab pages.
      array<TabPage^>^tabPages = {tabPage1,tabPage2};
      this->tabControl1->TabPages->AddRange( tabPages );
      
      // Checks the tabControl1 controls collection for tabPage3.
      // Adds tabPage3 to tabControl1 if it is not in the collection.
      if ( !tabControl1->TabPages->Contains( tabPage3 ) )
            this->tabControl1->TabPages->Add( tabPage3 );

      this->tabControl1->Location = Point(25,25);
      this->tabControl1->Size = System::Drawing::Size( 250, 250 );
      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;
    private TabPage tabPage2;
    private TabPage tabPage3;

    public Form1()
    {
        this.tabControl1 = new TabControl();
        string[] tabText = {"tabPage1", "tabPage2", "tabPage3"};
        this.tabPage1 = new TabPage(tabText[0]);
        this.tabPage2 = new TabPage(tabText[1]);
        this.tabPage3 = new TabPage(tabText[2]);

        // Populates the tabControl1 with two tab pages.
        this.tabControl1.TabPages.AddRange(new TabPage[] {
            tabPage1, tabPage2});

        // Checks the tabControl1 controls collection for tabPage3.
        // Adds tabPage3 to tabControl1 if it is not in the collection.
        if (!tabControl1.TabPages.Contains(tabPage3))
            this.tabControl1.TabPages.Add(tabPage3);

        this.tabControl1.Location = new Point(25, 25);
        this.tabControl1.Size = new Size(250, 250);

        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
    Private tabPage2 As TabPage
    Private tabPage3 As TabPage

    Public Sub New()
        Me.tabControl1 = New TabControl()
        Dim tabText As String() = {"tabPage1", "tabPage2", "tabPage3"}
        Me.tabPage1 = New TabPage(tabText(0))
        Me.tabPage2 = New TabPage(tabText(1))
        Me.tabPage3 = New TabPage(tabText(2))

        ' Populates the tabControl1 with two tab pages.      
        Me.tabControl1.TabPages.AddRange(New TabPage() {tabPage1, tabPage2})

        ' Checks the tabControl1 controls collection for tabPage3.
        ' Adds tabPage3 to tabControl1 if it is not in the collection.
        If tabControl1.TabPages.Contains(tabPage3) = False Then
            Me.tabControl1.TabPages.Add(tabPage3)
        End If

        Me.tabControl1.Location = New Point(25, 25)
        Me.tabControl1.Size = New Size(250, 250)

        Me.ClientSize = New Size(300, 300)
        Me.Controls.Add(tabControl1)
    End Sub

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

Se aplica a

Consulte también