C# 模拟鼠标操作工具类

本文介绍: 用WinForm做RPA项目时经常需要模拟鼠标操作，通过调用Win dows Api 可以实现控制鼠标的移动、点击以及滚轮滚动，做到跟人工一样的操作

写在前面

用WinForm做RPA项目时经常需要模拟鼠标操作，通过调用Windows Api 可以实现控制鼠标的移动、点击以及滚轮滚动，做到跟人工一样的操作。

代码 实现

    public static class MouseKeyController
    {
        [DllImport("user32")]
        private static extern int mouse_event(int dwFlags, int dx, int dy, int dwData, int dwExtraInfo);

        [DllImport("user32.dll", EntryPoint = "keybd_event", SetLastError = true)]
        private static extern void keybd_event(Keys bVk, byte bScan, uint dwFlags, uint dwExtraInfo);

        [DllImport("user32.dll", EntryPoint = "PostMessageA", SetLastError = true)]
        private static extern int PostMessage(IntPtr hWnd, int Msg, Keys wParam, int lParam);

        #region 屏幕分辨率和缩放百分比

        [DllImport("user32.dll")]
        private static extern IntPtr GetDC(IntPtr ptr);
        [DllImport("gdi32.dll")]
        private static extern int GetDeviceCaps(IntPtr hdc, int nIndex);
        [DllImport("user32.dll", EntryPoint = "ReleaseDC")]
        private static extern IntPtr ReleaseDC(IntPtr hWnd, IntPtr hDc);

        const int HORZRES = 8;
        const int VERTRES = 10;
        const int LOGPIXELSX = 88;
        const int LOGPIXELSY = 90;
        const int DESKTOPVERTRES = 117;
        const int DESKTOPHORZRES = 118;

        /// <summary&gt;
        /// 获取真实屏幕分辨率大小
        /// </summary>
        public static Size DESKTOP
        {
            get 
            {
                IntPtr hdc = GetDC(IntPtr.Zero);
                Size size = new Size();
                size.Width = GetDeviceCaps(hdc, DESKTOPHORZRES);
                size.Height = GetDeviceCaps(hdc, DESKTOPVERTRES);
                ReleaseDC(IntPtr.Zero, hdc);
                return size;
            }
        }

        #endregion

        //移动鼠标 
        const int MOUSEEVENTF_MOVE = 0x0001;
        //模拟鼠标左键按下 
        const int MOUSEEVENTF_LEFTDOWN = 0x0002;
        //模拟鼠标左键抬起 
        const int MOUSEEVENTF_LEFTUP = 0x0004;
        //模拟鼠标右键按下 
        const int MOUSEEVENTF_RIGHTDOWN = 0x0008;
        //模拟鼠标右键抬起 
        const int MOUSEEVENTF_RIGHTUP = 0x0010;
        //模拟鼠标中键按下 
        const int MOUSEEVENTF_MIDDLEDOWN = 0x0020;
        //模拟鼠标中键抬起 
        const int MOUSEEVENTF_MIDDLEUP = 0x0040;
        //标示是否采用绝对坐标 
        const int MOUSEEVENTF_ABSOLUTE = 0x8000;
        //模拟鼠标滚轮滚动操作，必须配合dwData参数
        const int MOUSEEVENTF_WHEEL = 0x0800;

        private static int screenWidth = 0;
        private static int screenHeight = 0;

        public static void Init()
        {
            screenWidth = Screen.PrimaryScreen.Bounds.Width;
            screenHeight = Screen.PrimaryScreen.Bounds.Height;
        }

        public static void MoveMouseWheel(int offset)
        {
            mouse_event(MOUSEEVENTF_WHEEL, 0, 0, offset, 0);//鼠标滚动，使界面向下滚动offset的高度
        }

        public static void MoveMousePoint(int x, int y)
        { 
            mouse_event(MOUSEEVENTF_MOVE, x, y, 0, 0);//相对当前鼠标位置x轴和y轴分别移动50像素
        }
        
        public static void SetMousePoint(int x, int y)
        {
            // 需要说明的是，如果没有使用MOUSEEVENTF_ABSOLUTE，函数默认的是相对于鼠标当前位置的点，如果dx，和dy，用0，0表示，这函数认为是当前鼠标所在的点。
            mouse_event(MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE, x * 65536 / screenWidth, y * 65536 / screenHeight, 0, 0);
        }

        public static void MouseLeftDown()
        {
            mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, 0);
        }

        public static void MouseLeftUp()
        {
            mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, 0);
        }

        public static void MouseLeftClick()
        {
            mouse_event(MOUSEEVENTF_LEFTDOWN | MOUSEEVENTF_LEFTUP, 0, 0, 0, 0);
        }

        public static void MouseRightClick()
        {
            mouse_event(MOUSEEVENTF_RIGHTDOWN | MOUSEEVENTF_RIGHTUP, 0, 0, 0, 0);
        }


    }