ToolStripItem.MouseDown 事件

定义

当鼠标指针放置在该项上时,在按鼠标按钮时发生。

public:
 event System::Windows::Forms::MouseEventHandler ^ MouseDown;
public event System.Windows.Forms.MouseEventHandler MouseDown;
public event System.Windows.Forms.MouseEventHandler? MouseDown;
member this.MouseDown : System.Windows.Forms.MouseEventHandler 
Public Custom Event MouseDown As MouseEventHandler 

事件类型

示例

下面的代码示例演示了此成员的用法。 在此示例中,事件处理程序报告事件的发生情况 MouseDown 。 此报表可帮助你了解事件发生的时间,并可以帮助你进行调试。 若要报告多个事件或频繁发生的事件,请考虑将 MessageBox.Show 替换为 Console.WriteLine 或将消息追加到多行 TextBox

若要运行示例代码,请将其粘贴到包含继承自 ToolStripItem的类型实例(如 ToolStripButtonToolStripMenuItem)的项目中。 然后命名实例 ToolStripItem1 并确保事件处理程序与事件 MouseDown 相关联。

private void ToolStripItem1_MouseDown(Object sender, MouseEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "Button", e.Button );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Clicks", e.Clicks );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "X", e.X );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Y", e.Y );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Delta", e.Delta );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Location", e.Location );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "MouseDown Event" );
}
Private Sub ToolStripItem1_MouseDown(sender as Object, e as MouseEventArgs) _ 
     Handles ToolStripItem1.MouseDown

    Dim messageBoxVB as New System.Text.StringBuilder()
    messageBoxVB.AppendFormat("{0} = {1}", "Button", e.Button)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "Clicks", e.Clicks)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "X", e.X)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "Y", e.Y)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "Delta", e.Delta)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "Location", e.Location)
    messageBoxVB.AppendLine()
    MessageBox.Show(messageBoxVB.ToString(),"MouseDown Event")

End Sub

注解

鼠标事件按下列顺序发生:

  1. MouseEnter

  2. MouseMove

  3. MouseHoverMouseDown

  4. MouseUp

  5. MouseLeave

有关处理事件的详细信息,请参阅 处理和引发事件

适用于

另请参阅