winform click点击事件 左键 OR 右键

1.Click事件——EventArgs强转MouseEventArgs

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button1.Click += new System.EventHandler(button1_Click);  
private void button1_Click(object sender, EventArgs e)  
{  
        //EventArgs继承自MouseEventArgs,所以可以强转  
        //把EventArgs强制转换成MouseEventArgs就可以判断鼠标左右键了
        MouseEventArgs Mouse_e = (MouseEventArgs)e;  
  
        //判断点击鼠标左键或右键
        if (Mouse_e.Button == MouseButtons.Left)  
        {  
            MessageBox.Show("这是鼠标左键");  
            //这里写鼠标左键点击事件
        }  
        else if (Mouse_e.Button == MouseButtons.Right)  
        {  
            MessageBox.Show("这是鼠标右键");  
            //这里写鼠标左键点击事件
        }  
}  
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2.通过MouseDown委托

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button2.MouseDown += new MouseEventHandler(button2_MouseDown);  
private void button2_MouseDown(object sender, MouseEventArgs e)  
{
        //判断点击鼠标左键或右键
        if (Mouse_e.Button == MouseButtons.Left)  
        {  
            MessageBox.Show("这是鼠标左键");  
            //这里写鼠标左键点击事件
        }  
        else if (Mouse_e.Button == MouseButtons.Right)  
        {  
            MessageBox.Show("这是鼠标右键");  
            //这里写鼠标左键点击事件
        }  
 } 
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