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ToolStripRenderer.RenderDropDownButtonBackground Event

Definition

Occurs when the background for a ToolStripDropDownButton is rendered.

public event System.Windows.Forms.ToolStripItemRenderEventHandler RenderDropDownButtonBackground;

Event Type

Examples

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" );
}

Remarks

For more information about handling events, see Handling and Raising Events.

Applies to

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