ContextMenuStrip.SourceControl Propriété

Définition

Obtient le dernier contrôle qui a provoqué l'affichage de ce ContextMenuStrip.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

Valeur de propriété

Contrôle qui a provoqué l'affichage de ce ContextMenuStrip.The control that caused this ContextMenuStrip to be displayed.

Attributs

Exemples

L’exemple de code suivant illustre la détermination de SourceControl dynamique avec réutilisation et la gestion de l’événement Opening.The following code example demonstrates dynamic SourceControl determination with reuse, and handling of the Opening event. Cet exemple fait partie d’un exemple plus complet fourni pour la classe ContextMenuStrip.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

Remarques

Les utilisations courantes de la propriété SourceControl sont les suivantes :Common uses of the SourceControl property include the following:

  • Ajout, suppression, activation ou désactivation d’un élément de menu pendant l’événement Opening.Adding, removing, enabling, or disabling a menu item during the Opening event.

  • Choix des modifications apportées à une commande choisie en fonction du contrôle qui a affiché la dernière ContextMenuStrip.Deciding on modifications of a chosen command based on the control that last displayed the ContextMenuStrip.

Sécurité

UIPermission
pour que toutes les fenêtres définissent cette valeur de propriété.for all windows to set this property value. Énumération associée : AllWindowsAssociated enumeration: AllWindows

S’applique à