C#窗体鼠标事件区分单击双击

直接用窗体的click和doubleclick事件相应函数是没办法区分的，因为click在doubleclick前面被触发。

办法一：

在mousedown事件中处理，通过timer计算两次单击时间差。

   private bool isFirstClick = true;
   private bool isDoubleClick = false;
   private int milliseconds = 0;
   private Rectangle hitTestRectangle = new Rectangle();
   private Rectangle doubleClickRectangle = new Rectangle();

 // Detect a valid single click or double click.
        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            // Verify that the mouse click is in the main hit
            // test rectangle.
            //if (!hitTestRectangle.Contains(e.Location))
            {
               // return;
            }

            // This is the first mouse click.
            if (isFirstClick)
            {
                isFirstClick = false;

                // Determine the location and size of the double click 
                // rectangle area to draw around the cursor point.
                doubleClickRectangle = new Rectangle(
                    e.X - (SystemInformation.DoubleClickSize.Width / 2),
                    e.Y - (SystemInformation.DoubleClickSize.Height / 2),
                    SystemInformation.DoubleClickSize.Width,
                    SystemInformation.DoubleClickSize.Height);
                Invalidate();

                // Start the double click timer.
                timer1.Start();
            }

            // This is the second mouse click.
            else
            {
                // Verify that the mouse click is within the double click
                // rectangle and is within the system-defined double 
                // click period.
                if (doubleClickRectangle.Contains(e.Location) &&
                    milliseconds < SystemInformation.DoubleClickTime)
                {
                    isDoubleClick = true;
                }
            }

        }

timer相应函数：

       private void timer1_Tick(object sender, EventArgs e) //计算间隔时间
        {
            milliseconds += 100;           

            // The timer has reached the double click time limit.
            if (milliseconds >= SystemInformation.DoubleClickTime)
            {
                timer1.Stop();
                if (isDoubleClick)
                {
                    //textBox1.AppendText("Perform double click action");
                    //textBox1.AppendText(Environment.NewLine);
                    MessageBox.Show("double click action ", "message:", MessageBoxButtons.OK);
                }
                else
                {
                    //textBox1.AppendText("Perform single click action");
                    //textBox1.AppendText(Environment.NewLine);
                    MessageBox.Show( "single click action ", "message:",MessageBoxButtons.OK);
                }

                // Allow the MouseDown event handler to process clicks again.
                isFirstClick = true;
                isDoubleClick = false;
                milliseconds = 0;
                
            }

        }

参考：http://msdn.microsoft.com/zh-cn/library/ms171543%28VS.80%29.aspx