ContextMenuStrip.SourceControl ContextMenuStrip.SourceControl ContextMenuStrip.SourceControl ContextMenuStrip.SourceControl Property

Definición

Obtiene el último control que provocó este ContextMenuStrip para mostrarse.Gets the last control that caused this ContextMenuStrip to be displayed.

public:
 property System::Windows::Forms::Control ^ SourceControl { System::Windows::Forms::Control ^ get(); };
[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.Control SourceControl { get; }
member this.SourceControl : System.Windows.Forms.Control
Public ReadOnly Property SourceControl As Control

Valor de propiedad

El control que provocó este ContextMenuStrip para mostrarse.The control that caused this ContextMenuStrip to be displayed.

Ejemplos

En el ejemplo de código siguiente se muestra dinámica SourceControl determinación con reutilización y tratamiento de la Opening eventos.The following code example demonstrates dynamic SourceControl determination with reuse, and handling of the Opening event. Este ejemplo forma parte de un ejemplo más extenso proporcionado para el ContextMenuStrip clase.This example is part of a larger example provided for the ContextMenuStrip class.

// This event handler is invoked when the ContextMenuStrip
// control's Opening event is raised. It demonstrates
// dynamic item addition and dynamic SourceControl 
// determination with reuse.
void cms_Opening(object sender, System.ComponentModel.CancelEventArgs e)
{
    // Acquire references to the owning control and item.
    Control c = fruitContextMenuStrip.SourceControl as Control;
    ToolStripDropDownItem tsi = fruitContextMenuStrip.OwnerItem as ToolStripDropDownItem;

    // Clear the ContextMenuStrip control's Items collection.
    fruitContextMenuStrip.Items.Clear();

    // Check the source control first.
    if (c != null)
    {
        // Add custom item (Form)
        fruitContextMenuStrip.Items.Add("Source: " + c.GetType().ToString());
    }
    else if (tsi != null)
    {
        // Add custom item (ToolStripDropDownButton or ToolStripMenuItem)
        fruitContextMenuStrip.Items.Add("Source: " + tsi.GetType().ToString());
    }

    // Populate the ContextMenuStrip control with its default items.
    fruitContextMenuStrip.Items.Add("-");
    fruitContextMenuStrip.Items.Add("Apples");
    fruitContextMenuStrip.Items.Add("Oranges");
    fruitContextMenuStrip.Items.Add("Pears");

    // Set Cancel to false. 
    // It is optimized to true based on empty entry.
    e.Cancel = false;
}
' This event handler is invoked when the ContextMenuStrip
' control's Opening event is raised. It demonstrates
' dynamic item addition and dynamic SourceControl 
' determination with reuse.
 Sub cms_Opening(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs)

     ' Acquire references to the owning control and item.
     Dim c As Control = fruitContextMenuStrip.SourceControl
     Dim tsi As ToolStripDropDownItem = fruitContextMenuStrip.OwnerItem 

     ' Clear the ContextMenuStrip control's 
     ' Items collection.
     fruitContextMenuStrip.Items.Clear()

     ' Check the source control first.
     If (c IsNot Nothing) Then
         ' Add custom item (Form)
         fruitContextMenuStrip.Items.Add(("Source: " + c.GetType().ToString()))
     ElseIf (tsi IsNot Nothing) Then
         ' Add custom item (ToolStripDropDownButton or ToolStripMenuItem)
         fruitContextMenuStrip.Items.Add(("Source: " + tsi.GetType().ToString()))
     End If

     ' Populate the ContextMenuStrip control with its default items.
     fruitContextMenuStrip.Items.Add("-")
     fruitContextMenuStrip.Items.Add("Apples")
     fruitContextMenuStrip.Items.Add("Oranges")
     fruitContextMenuStrip.Items.Add("Pears")

     ' Set Cancel to false. 
     ' It is optimized to true based on empty entry.
     e.Cancel = False
 End Sub

Comentarios

Usos comunes de la SourceControl propiedad incluyen los siguientes:Common uses of the SourceControl property include the following:

  • Agregar, quitar, habilitar o deshabilitar un elemento de menú durante el Opening eventos.Adding, removing, enabling, or disabling a menu item during the Opening event.

  • Decidir las modificaciones de un comando elegido basada en el control que muestra por última vez el ContextMenuStrip.Deciding on modifications of a chosen command based on the control that last displayed the ContextMenuStrip.

Seguridad

UIPermission
para todas las ventanas establecer este valor de propiedad.for all windows to set this property value. Enumeración asociada: AllWindowsAssociated enumeration: AllWindows

Se aplica a