c# - 如何使用InputSimulator模拟远程桌面上的特定按键？

Question

我目前正在使用 InputSimulator v0.1.0.0 模拟远程桌面上的按键和/或鼠标事件。基本按键(例如按“a”)有效，但特殊字符(如“tab”、“enter”)无效。我模拟输入文本:

InputSimulator.SimulateTextEntry("blabla");

但以下仅适用于本地:

InputSimulator.SimulateKeyPress(VirtualKeyCode.TAB);

或

InputSimulator.SimulateKeyPress(VirtualKeyCode.RETURN);

我在网上搜索了工作示例，但没有找到任何有用的东西。有人知道如何让它发挥作用吗？

提前致谢!

------------------------自己的答案-------------------- --------------

再谷歌搜索之后，我找到了这篇文章:

http://www.pinvoke.net/default.aspx/user32.keybd_event

其中有一个很好的代码，它没有解决 InputSimulator 问题，但正是我需要的。这是代码，以及我是如何使用它的:

[StructLayout(LayoutKind.Sequential)]
    public struct KEYBOARD_INPUT
    {
        public const uint Type = 1;
        public ushort wVk;
        public ushort wScan;
        public uint dwFlags;
        public uint time;
        public IntPtr dwExtraInfo;
    }

    [StructLayout(LayoutKind.Sequential)]
    struct MOUSEINPUT
    {
        public int dx;
        public int dy;
        public uint mouseData;
        public uint dwFlags;
        public uint time;
        public IntPtr dwExtraInfo;
    };

    [StructLayout(LayoutKind.Explicit)]
    struct KEYBDINPUT
    {
        [FieldOffset(0)]
        public ushort wVk;
        [FieldOffset(2)]
        public ushort wScan;
        [FieldOffset(4)]
        public uint dwFlags;
        [FieldOffset(8)]
        public uint time;
        [FieldOffset(12)]
        public IntPtr dwExtraInfo;
    };

    [StructLayout(LayoutKind.Sequential)]
    struct HARDWAREINPUT
    {
        public uint uMsg;
        public ushort wParamL;
        public ushort wParamH;
    };

    [StructLayout(LayoutKind.Explicit)]
    struct INPUT
    {
        [FieldOffset(0)]
        public int type;
        [FieldOffset(4)]
        public MOUSEINPUT mi;
        [FieldOffset(4)]
        public KEYBDINPUT ki;
        [FieldOffset(4)]
        public HARDWAREINPUT hi;
    };
    [DllImport("user32.dll", SetLastError = true)]
    static extern uint SendInput(uint nInputs, IntPtr pInput, int cbSize);

这就是我如何称呼“按 TAB”事件:

keybd_event(0x09, 0x0f, 0, 0); // Tab Press

keybd_event(0x09, 0x0f, 0x0002, 0);

Answer 1

按照建议，我复制我的解决方案作为答案。我希望这些对任何处理类似问题的人有所帮助。 :) 解决方案有点长，但问题不仅是“如何以编程方式按下按钮”，还有“如何通过远程桌面使其工作”和“如何制定通用解决方案”对于不同的键盘'。嗯，我不是 100% 确定最后一个问题已经完全解决，但下面的解决方案可能会用于进一步的开发。我也知道代码不是最优的，有时甚至很丑陋，但我仍在测试和开发它! :)

//m_text is the whole text i want to write. It may contain special characters,
//like 'enter', 'tab', lower/upper-case chars, and chars with shit/alt is
//pressed, like ';'.

                //Test with this string, its difficult-enough. :)
                string m_text = "123qweQWE;{tab}!{eNTer}*|";

                IntPtr keyboardLayout = GetKeyboardLayout(0);

                while (!string.IsNullOrWhiteSpace(m_text))
                {
                    int m_Index = 0;

                    //Enter, tab and similar keys are in {} brackets
                    //(for example {tab}). We get the 'tab' from the
                    //string and pass this to our method. Key combinations
                    //are separated by a '+' like {alt+tab+tab}, from this
                    //we will get 'press the alt, then press the tab, then
                    //press the tab again'.
                    if (m_text[m_Index] == '{')
                    {
                        #region [ Special chars ]
                        string m_SubString = m_text.Substring(
                                                    m_Index + 1, m_text.IndexOf("}") - 1);

                        string[] m_Splitted = m_SubString.Split(new char[] { '+' });

                        for (int i = 0; i < m_Splitted.Length; i++)
                        {
                            //If the string is longer than 1 char it means we are processing a tab-like key.
                            if (m_Splitted[i].Length > 1)
                                PressSpecial(m_Splitted[i]);
                            else
                            {
                                //If the char is 1-char-long, it means we previously pressed a tab-like key,
                                //and now we press a simple key, like in the case of {altgr+w}.

                                //Get the virtual key of the char.
                                short vKey = VkKeyScanEx(
                                    char.Parse(m_Splitted[i]), keyboardLayout);

                                //Get the low byte from the virtual key.
                                byte m_LOWBYTE = (Byte)(vKey & 0xFF);

                                //Get the scan code of the key.
                                byte sScan = (byte)MapVirtualKey(m_LOWBYTE, 0);

                                //Press the key.
                                //Key down event, as indicated by the 3rd parameter that is 0.
                                keybd_event(m_LOWBYTE, sScan, 0, 0);
                            }
                        }

                        Application.DoEvents();

                        //We have pressed all the keys we wanted, now release them in backward-order
                        //when pressing alt+tab we beed to release them in tab-alt order! The logic is the same.
                        for (int i = m_Splitted.Length - 1; i > -1; i--)
                        {
                            if (m_Splitted[i].Length > 1)
                                ReleaseSpecial(m_Splitted[i]);
                            else
                            {
                                short vKey = VkKeyScanEx(
                                    char.Parse(m_Splitted[i]), keyboardLayout);

                                byte m_LOWBYTE = (Byte)(vKey & 0xFF);

                                byte sScan = (byte)MapVirtualKey(m_LOWBYTE, 0);

                                //Key up event, as indicated by the 3rd parameter that is 0x0002.
                                keybd_event(m_LOWBYTE, sScan, 0x0002, 0); //Key up
                            }
                        }

                        Application.DoEvents();

                        #endregion

                        //We do not use the '{' and '}' brackets, thats why the '+2'. :)
                        m_Index = m_SubString.Length + 2;
                    }
                    else
                    {
                        #region [ One char ]
                        short vKey = VkKeyScanEx(m_text[m_Index], keyboardLayout);

                        //Hi-byte indicates if we need to press shift, alt or other similar keys.
                        byte m_HIBYTE = (Byte)(vKey >> 8);
                        byte m_LOWBYTE = (Byte)(vKey & 0xFF);

                        byte sScan = (byte)MapVirtualKey(m_LOWBYTE, 0);

                        //Press the special key if needed.
                        if ((m_HIBYTE == 1))
                            PressShift();
                        else if ((m_HIBYTE == 2))
                            PressControl();
                        else if ((m_HIBYTE == 4))
                            PressAlt();
                        else if ((m_HIBYTE == 6))
                            PressAltGr();

                        //Press, then release the key.
                        keybd_event(m_LOWBYTE, sScan, 0, 0); //Key down
                        keybd_event(m_LOWBYTE, sScan, 0x0002, 0); //Key up

                        //Release the special key if needed.
                        if ((m_HIBYTE == 1))
                            ReleaseShift();
                        else if ((m_HIBYTE == 2))
                            ReleaseControl();
                        else if ((m_HIBYTE == 4))
                            ReleaseAlt();
                        else if ((m_HIBYTE == 6))
                            ReleaseAltGr();
                        #endregion

                        //Get the next char from the string.
                        m_Index++;
                    }

                    //Remove the already processed chars from the string.
                    if (m_Index < m_text.Length)
                        m_text = m_text.Substring(m_Index);
                    else
                        m_text = string.Empty;
                }

所以，这就是处理字符串的逻辑。让我们看看将处理事件的辅助方法:

按下和释放特殊键是一样的，只是前两个参数不同。查看msdn获取enter,tab,alt,altgr等的虚拟和扫码...

#region [ Press shift ]
private void PressShift()
{
    //0xA0 is the virtual key of 'shift'.
    //0x2A is the scan code of 'shift'.
    keybd_event(0xA0, 0x2A, 0, 0);
} 
#endregion

#region [ Release shift ]
private void ReleaseShift()
{
    keybd_event(0xA0, 0x2A, 0x0002, 0);
} 
#endregion

PressSpecial 与上面的代码类似，所以它也可以用于shift。我将其中的一些分成不同的方法，因为对我来说更容易看到我在代码中使用的内容(对我来说使用'PressShift();'而不是'PressSpecial(“shift”)';更容易)。 :)

private void PressSpecial(string p_Special)
{
    switch (p_Special.ToLower()) //<-- use lower version!
    {
        case "home":
            keybd_event(0x24, 0x47, 0, 0);
            break;
        case "end":
            keybd_event(0x23, 0x4F, 0, 0);
            break;
        //Do the same for any key you need (enter, tab, page up, etc...).
        //Remember to get the proper virtual- and scan codes for each keys!
    }
}

ReleaseSpecial 与PressSpecial 相同，但第3 个参数为0x0002。

private void ReleaseSpecial(string p_Special)
{
    switch (p_Special.ToLower())
    {
        case "home":
            keybd_event(0x24, 0x47, 0x0002, 0);
            break;
        case "end":
            keybd_event(0x23, 0x4F, 0x0002, 0);
            break;
    }
}

最后，这里是 dll 导入方法。如果您愿意，可以将它们放入静态类中:

[DllImport("user32.dll", EntryPoint = "keybd_event", CharSet = CharSet.Auto, 
ExactSpelling = true)]
public static extern void keybd_event(byte vk, byte scan, int flags, int extrainfo);

[DllImport("user32.dll")]
public static extern IntPtr GetKeyboardLayout(uint idThread);

[DllImport("user32.dll")]
public static extern short VkKeyScanEx(char ch, IntPtr dwhkl); 

[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern int MapVirtualKey(int uCode, int uMapType);