ToolStripRenderer.RenderDropDownButtonBackground Event
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Occurs when the background for a ToolStripDropDownButton is rendered.
public:
event System::Windows::Forms::ToolStripItemRenderEventHandler ^ RenderDropDownButtonBackground;
public event System.Windows.Forms.ToolStripItemRenderEventHandler RenderDropDownButtonBackground;
member this.RenderDropDownButtonBackground : System.Windows.Forms.ToolStripItemRenderEventHandler
Public Custom Event RenderDropDownButtonBackground As ToolStripItemRenderEventHandler
The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the RenderDropDownButtonBackground event. This report helps you to learn when the event occurs and can assist you in debugging.
To run the example code, paste it into a project that contains an instance of a type that inherits from ToolStripRenderer, such as a ToolStripSystemRenderer or ToolStripProfessionalRenderer. Then name the instance ToolStripRenderer1
and ensure that the event handler is associated with the RenderDropDownButtonBackground event.
private void ToolStripRenderer1_RenderDropDownButtonBackground(Object sender, ToolStripItemRenderEventArgs e) {
System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "Graphics", e.Graphics );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Item", e.Item );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "ToolStrip", e.ToolStrip );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "RenderDropDownButtonBackground Event" );
}
Private Sub ToolStripRenderer1_RenderDropDownButtonBackground(sender as Object, e as ToolStripItemRenderEventArgs) _
Handles ToolStripRenderer1.RenderDropDownButtonBackground
Dim messageBoxVB as New System.Text.StringBuilder()
messageBoxVB.AppendFormat("{0} = {1}", "Graphics", e.Graphics)
messageBoxVB.AppendLine()
messageBoxVB.AppendFormat("{0} = {1}", "Item", e.Item)
messageBoxVB.AppendLine()
messageBoxVB.AppendFormat("{0} = {1}", "ToolStrip", e.ToolStrip)
messageBoxVB.AppendLine()
MessageBox.Show(messageBoxVB.ToString(),"RenderDropDownButtonBackground Event")
End Sub
For more information about handling events, see Handling and Raising Events.
Termék | Verziók |
---|---|
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
Windows Desktop | 3.0, 3.1, 5, 6, 7, 8, 9 |
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