.net中模擬鍵盤和鼠標操作

            周銀輝

其實SendKeys類提供的方法蠻好用的,可惜的是WPF中不能用了,說是WPF的消息循環方式改成了Dispatcher,所以直接調用System.Windows.Forms.SendKeys.Send()方法會報錯. 不過沒關係, 至少有use32的SendInput可用,通過P/Invoke方式,我們可以模擬鍵盤或鼠標操作.

定義是這樣的:

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

其中的INPUT結構表示一個鍵盤或鼠標操作:

[StructLayout(LayoutKind.Sequential)]
internal struct INPUT
{
internal int type;
internal INPUTUNION union;
};
[StructLayout(LayoutKind.Explicit)]
internal struct INPUTUNION
{
[FieldOffset(0)]
internal MOUSEINPUT mouseInput;
[FieldOffset(0)]
internal KEYBDINPUT keyboardInput;
};
[StructLayout(LayoutKind.Sequential)]
internal struct MOUSEINPUT
{
internal int dx;
internal int dy;
internal int mouseData;
internal int dwFlags;
internal int time;
internal IntPtr dwExtraInfo;
};
[StructLayout(LayoutKind.Sequential)]
internal struct KEYBDINPUT
{
internal short wVk;
internal short wScan;
internal int dwFlags;
internal int time;
internal IntPtr dwExtraInfo;
};
[Flags]
internal enum SendMouseInputFlags
{
Move = 0x0001,
LeftDown = 0x0002,
LeftUp = 0x0004,
RightDown = 0x0008,
RightUp = 0x0010,
MiddleDown = 0x0020,
MiddleUp = 0x0040,
XDown = 0x0080,
XUp = 0x0100,
Wheel = 0x0800,
Absolute = 0x8000,
};

關於這些方法或結構的定義在http://www.pinvoke.net/index.aspx 這個網站上可以查找得到(但不保證百分百靠譜)

下面這個代碼文件做了一個很好的包裝,可以下載後參考:
Simulation.zip

如何使用呢?
很簡單, 要敲一個鍵, 比如回車:

Keyboard.Press(Key.Enter);
Keyboard.Release(Key.Enter);

要敲一個組合鍵:比如Alt+F4
Keyboard.Press(Key.LeftAlt);
Keyboard.Press(Key.F4);
Keyboard.Release(Key.LeftAlt);
Keyboard.Release(Key.F4);

要敲一段文字:
Keyboard.Type("notepad");

鼠標與之類似,比如:
Mouse.MoveTo(new System.Drawing.Point(x, y));
Mouse.Click(MouseButton.Right);