TabControl.TabPageCollection.Contains(TabPage) Método

  • Referencia

Definición

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

Determina si una página de ficha especificada se encuentra 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

TabPage que se va a buscar en la colección.

Devoluciones

Boolean

true si el objeto TabPage especificado se encuentra en la colección; en caso contrario, false.

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 pestañas al tabControl1 AddRange método . El Contains método determina tabPage3 que forma parte de la tabControl1 colección controls. 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 ) == false )
            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) == false)
            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