C#/winform 自動觸發鼠標、鍵盤事件

要在C#程序中觸發鼠標、鍵盤事件必須要調用windows函數。

一、鼠標事件的觸發

 1.引用windows函數mouse_event

  

/// <summary>
        /// 鼠標事件
        /// </summary>
        /// <param name="flags">事件類型</param>
        /// <param name="dx">x坐標值(0~65535)</param>
        /// <param name="dy">y坐標值(0~65535)</param>
        /// <param name="data">滾動值(120一個單位)</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表示鼠標事件的類型，可取多個枚舉值組合。注意dx,dy參數，必須是絕對坐標（0,0）~（65535,65535）中的一點。

 /// <summary>
    /// 鼠標操作標志位集合
    /// </summary>
    [Flags]
    enum MouseEventFlag : uint
    {
        /// <summary>
        /// 鼠標移動事件
        /// </summary>
        Move = 0x0001,
 
        /// <summary>
        /// 鼠標左鍵按下事件
        /// </summary>
        LeftDown = 0x0002,
        LeftUp = 0x0004,
        RightDown = 0x0008,
        RightUp = 0x0010,
        MiddleDown = 0x0020,
        MiddleUp = 0x0040,
        XDown = 0x0080,
        XUp = 0x0100,
        Wheel = 0x0800,
        VirtualDesk = 0x4000,
        /// <summary>
        /// 設置鼠標坐標為絕對位置（dx,dy）,否則為距離最后一次事件觸發的相對位置
        /// </summary>
        Absolute = 0x8000
    }

2.調用mouse_event函數，觸發鼠標事件

  /// <summary>
        /// 觸發鼠標事件
        /// </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)之間
            int dy = (int)((double)y / Screen.PrimaryScreen.Bounds.Height * 0xffff); //轉換為double類型運算，否則值為0、1
            mouse_event(MouseEventFlag.Move | MouseEventFlag.LeftDown | MouseEventFlag.LeftUp | MouseEventFlag.Absolute, dx, dy, 0, new UIntPtr(0)); //點擊
        }

 

二、鍵盤事件的觸發

1.引用windows函數keybd_event

/// <summary>
        /// 鍵盤事件
        /// </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為鍵值，例如回車13，bScan設置為0，dwFlags設置0表示按下，2表示抬起；dwExtraInfo也設置為0即可。

2.調用keybd_event函數，觸發鍵盤事件

   下面的代碼演示觸發Ctrl+C組合鍵，執行復制操作。

            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);