Question

除非我移动光标，否则SendInput不会执行鼠标单击按钮。

我很感激这方面的帮助，因为我似乎无法绕过它。

我有一个程序在前景窗口上执行鼠标点击，我在其中使用SendInput来模拟鼠标左键单击。问题是，如果我将光标移动到点击位置而不是SendInput将进行点击，但是如果我不移动光标而不是没有点击发生，即使通过我传递x和y指向MouseInputData。我想执行鼠标左键而不需要实际移动光标。

贝娄是我所拥有的课程（相当简单，直截了当）

namespace StackSolution.Classes
{
    public static class SendInputClass
    {

        [DllImport("user32.dll", SetLastError = true)]
        static extern uint SendInput(uint nInputs, ref INPUT pInputs, int cbSize);

        [DllImport("user32.dll")]
        static extern bool SetCursorPos(int X, int Y);

        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        static extern bool GetCursorPos(out Point lpPoint);



        [StructLayout(LayoutKind.Sequential)]
        struct INPUT
        {
            public SendInputEventType type;
            public MouseKeybdhardwareInputUnion mkhi;
        }
        [StructLayout(LayoutKind.Explicit)]
        struct MouseKeybdhardwareInputUnion
        {
            [FieldOffset(0)]
            public MouseInputData mi;

            [FieldOffset(0)]
            public KEYBDINPUT ki;

            [FieldOffset(0)]
            public HARDWAREINPUT hi;
        }
        [StructLayout(LayoutKind.Sequential)]
        struct KEYBDINPUT
        {
            public ushort wVk;
            public ushort wScan;
            public uint dwFlags;
            public uint time;
            public IntPtr dwExtraInfo;
        }
        [StructLayout(LayoutKind.Sequential)]
        struct HARDWAREINPUT
        {         
            public int uMsg;
            public short wParamL;
            public short wParamH;
        }
        struct MouseInputData
        {
            public int dx;
            public int dy;
            public uint mouseData;
            public MouseEventFlags dwFlags;
            public uint time;
            public IntPtr dwExtraInfo;
        }
        [Flags]
        enum MouseEventFlags : uint
        {
            MOUSEEVENTF_MOVE = 0x0001,
            MOUSEEVENTF_LEFTDOWN = 0x0002,
            MOUSEEVENTF_LEFTUP = 0x0004,
            MOUSEEVENTF_RIGHTDOWN = 0x0008,
            MOUSEEVENTF_RIGHTUP = 0x0010,
            MOUSEEVENTF_MIDDLEDOWN = 0x0020,
            MOUSEEVENTF_MIDDLEUP = 0x0040,
            MOUSEEVENTF_XDOWN = 0x0080,
            MOUSEEVENTF_XUP = 0x0100,
            MOUSEEVENTF_WHEEL = 0x0800,
            MOUSEEVENTF_VIRTUALDESK = 0x4000,
            MOUSEEVENTF_ABSOLUTE = 0x8000
        }
        enum SendInputEventType : int
        {
            InputMouse,
            InputKeyboard,
            InputHardware
        }

        public static void ClickLeftMouseButton(int x, int y)
        {
            INPUT mouseInput = new INPUT();
            mouseInput.type = SendInputEventType.InputMouse;
            mouseInput.mkhi.mi.dx = x;
            mouseInput.mkhi.mi.dy = y;
            mouseInput.mkhi.mi.mouseData = 0;

            //getting current cursor location
            Point p;
            if (GetCursorPos(out p))
                SetCursorPos(x, y);


            mouseInput.mkhi.mi.dwFlags = MouseEventFlags.MOUSEEVENTF_LEFTDOWN;
            SendInput(1, ref mouseInput, Marshal.SizeOf(new INPUT()));

            mouseInput.mkhi.mi.dwFlags = MouseEventFlags.MOUSEEVENTF_LEFTUP;
            SendInput(1, ref mouseInput, Marshal.SizeOf(new INPUT()));

            //returning cursor to previous position
            SetCursorPos(p.X, p.Y);
        }    
    }
  }

如果我删除了那样的光标位置，则不会单击ClickLeftMouseButton函数。

   public static void ClickLeftMouseButton(int x, int y)
        {
            INPUT mouseInput = new INPUT();
            mouseInput.type = SendInputEventType.InputMouse;
            mouseInput.mkhi.mi.dx = x;
            mouseInput.mkhi.mi.dy = y;
            mouseInput.mkhi.mi.mouseData = 0;                     


            mouseInput.mkhi.mi.dwFlags = MouseEventFlags.MOUSEEVENTF_LEFTDOWN;
            SendInput(1, ref mouseInput, Marshal.SizeOf(new INPUT()));

            mouseInput.mkhi.mi.dwFlags = MouseEventFlags.MOUSEEVENTF_LEFTUP;
            SendInput(1, ref mouseInput, Marshal.SizeOf(new INPUT()));            
        }

提前谢谢。

Answer 1

使用SendInput功能时，您应该考虑以下几点。

如果未指定MOUSEEVENTF_ABSOLUTE标志，则dx和dy（MouseInputData结构）是当前鼠标位置的相对坐标。如果您指定MOUSEEVENTF_ABSOLUTE，则dx和dy是0到65535之间的绝对坐标。因此，如果您的x和y坐标是屏幕坐标，则应使用以下函数计算{{1 }和dx：

dy

此外，在通过SendInput发送MOUSEDOWN和MOUSEUP事件之前，您必须将鼠标移动到要单击的控件上：

enum SystemMetric
{
  SM_CXSCREEN = 0,
  SM_CYSCREEN = 1,
}

[DllImport("user32.dll")]
static extern int GetSystemMetrics(SystemMetric smIndex);

int CalculateAbsoluteCoordinateX(int x)
{
  return (x * 65536) / GetSystemMetrics(SystemMetric.SM_CXSCREEN);
}

int CalculateAbsoluteCoordinateY(int y)
{
  return (y * 65536) / GetSystemMetrics(SystemMetric.SM_CYSCREEN);
}

上述代码假定public static void ClickLeftMouseButton(int x, int y) { INPUT mouseInput = new INPUT(); mouseInput.type = SendInputEventType.InputMouse; mouseInput.mkhi.mi.dx = CalculateAbsoluteCoordinateX(x); mouseInput.mkhi.mi.dy = CalculateAbsoluteCoordinateY(y); mouseInput.mkhi.mi.mouseData = 0; mouseInput.mkhi.mi.dwFlags = MouseEventFlags.MOUSEEVENTF_MOVE |MouseEventFlags.MOUSEEVENTF_ABSOLUTE; SendInput(1, ref mouseInput, Marshal.SizeOf(new INPUT())); mouseInput.mkhi.mi.dwFlags = MouseEventFlags.MOUSEEVENTF_LEFTDOWN; SendInput(1, ref mouseInput, Marshal.SizeOf(new INPUT())); mouseInput.mkhi.mi.dwFlags = MouseEventFlags.MOUSEEVENTF_LEFTUP; SendInput(1, ref mouseInput, Marshal.SizeOf(new INPUT())); }和x是屏幕像素坐标。您可以使用以下代码计算winform上按钮（目标）的坐标：

希望，这有帮助。

除非我移动光标，否则SendInput不会执行鼠标单击按钮

1 个答案: