C#/winform 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);