TabPage.ImageIndex Propiedad

Definición

Espacio de nombres:

System.Windows.Forms

Ensamblado:

System.Windows.Forms.dll

Obtiene o establece el índice de la imagen que se muestra en esta ficha.

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

[System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.ImageIndexConverter))]
public int ImageIndex { get; set; }

[<System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.ImageIndexConverter))>]
member this.ImageIndex : int with get, set

Public Property ImageIndex As Integer

Valor de propiedad

Int32

Índice de base cero para la imagen de que ImageList aparece en la pestaña . El valor predeterminado es -1, lo que significa que no hay ninguna imagen.

Atributos

TypeConverterAttribute

Excepciones

ArgumentOutOfRangeException

value es menor que 1.

Ejemplos

En el ejemplo de código siguiente se crea un TabControl con uno TabPage. En este ejemplo se usa la propiedad para especificar qué ImageIndex imagen de myImages se muestra en la pestaña de tabPage1.

using namespace System::Drawing;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;
using namespace System::Resources;
public ref class Form1: public Form
{
public:
   Form1()
   {
      IContainer^ components = gcnew System::ComponentModel::Container;
      ResourceManager^ resources = gcnew ResourceManager( Form1::typeid );
      TabControl^ tabControl1 = gcnew TabControl;
      TabPage^ tabPage1 = gcnew TabPage;
      ImageList^ myImages = gcnew ImageList( components );
      tabControl1->Controls->Add( tabPage1 );
      
      // Displays images from myImages on the tabs of tabControl1.
      tabControl1->ImageList = myImages;
      
      // Specifies which image to display (on the tab of tabPage1) by its index.
      tabPage1->ImageIndex = 0;
      tabPage1->Text = "tabPage1";
      myImages->ImageStream = (dynamic_cast<ImageListStreamer^>(resources->GetObject( "myImages.ImageStream" )));
      myImages->ColorDepth = ColorDepth::Depth8Bit;
      myImages->ImageSize = System::Drawing::Size( 16, 16 );
      myImages->TransparentColor = Color::Transparent;
      this->Controls->Add( tabControl1 );
   }

};

int main()
{
   Application::Run( gcnew Form1 );
}

using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;
using System.Resources;

public class Form1 : Form
{
    public Form1()
    {
        IContainer components = new Container();
        ResourceManager resources = new ResourceManager(typeof(Form1));
        TabControl tabControl1 = new TabControl();
        TabPage tabPage1 = new TabPage();
        ImageList myImages = new ImageList(components);

        tabControl1.Controls.Add(tabPage1);

        // Displays images from myImages on the tabs of tabControl1.
        tabControl1.ImageList = myImages;

        // Specifies which image to display (on the tab of tabPage1) by its index.
        tabPage1.ImageIndex = 0;

        tabPage1.Text = "tabPage1";

        myImages.ImageStream = ((ImageListStreamer)(resources.GetObject("myImages.ImageStream")));
        myImages.ColorDepth = ColorDepth.Depth8Bit;
        myImages.ImageSize = new Size(16, 16);
        myImages.TransparentColor = Color.Transparent;

        this.Controls.Add(tabControl1);
    }

    static void Main() 
    {
        Application.Run(new Form1());
    }
}

Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms
Imports System.Resources

Public Class Form1
    Inherits Form

    Public Sub New()
        Dim components = New Container()
        Dim resources As New ResourceManager(GetType(Form1))
        Dim tabControl1 As New TabControl()
        Dim tabPage1 As New TabPage()
        Dim myImages As New ImageList(components)

        tabControl1.Controls.Add(tabPage1)

        ' Displays images from myImages on the tabs of tabControl1.
        tabControl1.ImageList = myImages

        ' Specifies which image to display (on the tab of tabPage1) by its index.
        tabPage1.ImageIndex = 0

        tabPage1.Text = "tabPage1"

        myImages.ImageStream = CType(resources.GetObject("myImages.ImageStream"), ImageListStreamer)
        myImages.ColorDepth = ColorDepth.Depth8Bit
        myImages.ImageSize = New Size(16, 16)
        myImages.TransparentColor = Color.Transparent

        Me.Controls.Add(tabControl1)
    End Sub

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

Comentarios

ImageIndex apunta a una imagen en el asociado ImageList de TabControl.

ImageKey y ImageIndex son mutuamente excluyentes, lo que significa que si se establece uno, el otro se establece en un valor no válido y se omite. Si establece la ImageKey propiedad , la ImageIndex propiedad se establece automáticamente en -1. Como alternativa, si establece la ImageIndex propiedad , se ImageKey establece automáticamente en una cadena vacía ("").

Consulte también

• ImageList