C# 自动触发鼠标、键盘事件

要在C#程序中触发鼠标、键盘事件必须要调用windows函数。

一、鼠标事件的触发

 1.引用windows函数mouse_event

        /// <summary>
        /// 鼠标事件
         /// </summary>
        /// <param name="flags">事件类型</param>
        /// <param name="dx">x坐标值(0~65535)</param>
        /// <param name="dy">y坐标值(0~65535)</param>
        /// <param name="data">滚动值(120一个单位)</param>
        /// <param name="extraInfo">不支持</param>
        [DllImport("user32.dll")]
        static extern void mouse_event(MouseEventFlag flags, int dx, int dy, uint data, UIntPtr extraInfo);

MouseEventFlag表示鼠标事件的类型，可取多个枚举值组合。注意dx,dy参数，必须是绝对坐标（0,0）~（65535,65535）中的一点。

    /// <summary>
    /// 鼠标操作标志位集合
    /// </summary>
    [Flags]
    enum MouseEventFlag : uint
    {
        /// <summary>
        /// 鼠标移动事件
        /// </summary>
        Move = 0x0001,
 
        /// <summary>
        /// 鼠标左键按下事件
        /// </summary>
        LeftDown = 0x0002,
        LeftUp = 0x0004,
        RightDown = 0x0008,
        RightUp = 0x0010,
        MiddleDown = 0x0020,
        MiddleUp = 0x0040,
        XDown = 0x0080,
        XUp = 0x0100,
        Wheel = 0x0800,
        VirtualDesk = 0x4000,
        /// <summary>
        /// 设置鼠标坐标为绝对位置（dx,dy）,否则为距离最后一次事件触发的相对位置
        /// </summary>
        Absolute = 0x8000
    }

2.调用mouse_event函数，触发鼠标事件

        /// <summary>
        /// 触发鼠标事件
         /// </summary>
        /// <param name="x"></param>
        /// <param name="y"></param>
        private static void DoMouseClick(int x, int y)
        {
            int dx = (int)((double)x / Screen.PrimaryScreen.Bounds.Width * 65535); //屏幕分辨率映射到0~65535(0xffff,即16位)之间
            int dy = (int)((double)y / Screen.PrimaryScreen.Bounds.Height * 0xffff); //转换为double类型运算，否则值为0、1
            mouse_event(MouseEventFlag.Move | MouseEventFlag.LeftDown | MouseEventFlag.LeftUp | MouseEventFlag.Absolute, dx, dy, 0, new UIntPtr(0)); //点击
        }

二、键盘事件的触发

1.引用windows函数keybd_event

        /// <summary>
        /// 键盘事件
         /// </summary>
        /// <param name="bVk"> virtual-key code</param>
        /// <param name="bScan">hardware scan code</param>
        /// <param name="dwFlags"> flags specifying various function options</param>
        /// <param name="dwExtraInfo"> additional data associated with keystroke</param>
        [DllImport("user32.dll")]
        public static extern void keybd_event(byte bVk, byte bScan, int dwFlags, int dwExtraInfo);

bvk为键值，例如回车13，bScan设置为0，dwFlags设置0表示按下，2表示抬起；dwExtraInfo也设置为0即可。

2.调用keybd_event函数，触发键盘事件

   下面的代码演示触发Ctrl+C组合键，执行复制操作。

keybd_event((byte)Keys.ControlKey, 0, 0, 0);
keybd_event((byte)Keys.C, 0, 0, 0);
keybd_event((byte)Keys.ControlKey, 0, 2, 0);
keybd_event((byte)Keys.C, 0, 2, 0);