ToolStripDropDownClosingEventArgs.CloseReason 属性

定义

获取 ToolStripDropDown 关闭的原因。Gets the reason that the ToolStripDropDown is closing.

public:
 property System::Windows::Forms::ToolStripDropDownCloseReason CloseReason { System::Windows::Forms::ToolStripDropDownCloseReason get(); };
public System.Windows.Forms.ToolStripDropDownCloseReason CloseReason { get; }
member this.CloseReason : System.Windows.Forms.ToolStripDropDownCloseReason
Public ReadOnly Property CloseReason As ToolStripDropDownCloseReason

属性值

ToolStripDropDownCloseReason

ToolStripDropDownCloseReason 值之一。One of the ToolStripDropDownCloseReason values.

示例

下面的代码示例演示如何使用此成员。The following code example demonstrates the use of this member. 在此示例中,事件处理程序报告事件的发生 ToolStripDropDown.ClosingIn the example, an event handler reports on the occurrence of the ToolStripDropDown.Closing event. 此报表可帮助你了解何时发生事件,并可帮助你进行调试。This report helps you to learn when the event occurs and can assist you in debugging. 若要报告多个事件或频繁发生的事件,请考虑 MessageBox.Show Console.WriteLine 将消息替换为多行或将其追加到多行 TextBoxTo report on multiple events or on events that occur frequently, consider replacing MessageBox.Show with Console.WriteLine or appending the message to a multiline TextBox.

若要运行示例代码,请将其粘贴到包含名为的类型的实例的项目中 ToolStripDropDown ToolStripDropDown1To run the example code, paste it into a project that contains an instance of type ToolStripDropDown named ToolStripDropDown1. 然后,确保事件处理程序与事件相关联 ToolStripDropDown.ClosingThen ensure that the event handler is associated with the ToolStripDropDown.Closing event.

private void ToolStripDropDown1_Closing(Object sender, ToolStripDropDownClosingEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "CloseReason", e.CloseReason );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Cancel", e.Cancel );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "Closing Event" );
}
Private Sub ToolStripDropDown1_Closing(sender as Object, e as ToolStripDropDownClosingEventArgs) _ 
     Handles ToolStripDropDown1.Closing

    Dim messageBoxVB as New System.Text.StringBuilder()
    messageBoxVB.AppendFormat("{0} = {1}", "CloseReason", e.CloseReason)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "Cancel", e.Cancel)
    messageBoxVB.AppendLine()
    MessageBox.Show(messageBoxVB.ToString(),"Closing Event")

End Sub

适用于