前言

最近再做触屏系统的时候需要手动调用打开系统软键盘的需求，网上查找到的资料很多，在高版本的fx上也能用，但是刚好我这个现场程序是基于fx2.0开发的，只能在之前的基础上改造支持。目前已经调整到可以支持使用，供大家享用。

using System;using System.Collections.Generic;using System.Diagnostics;using System.Management;using System.Runtime.InteropServices;namespace Common{/// <summary>/// 触摸键盘工具类/// </summary>public class TouchKeyBoardHelper{[DllImport("kernel32.dll", SetLastError = true)]private static extern bool Wow64DisableWow64FsRedirection(ref IntPtr ptr);[DllImport("kernel32.dll", SetLastError = true)]public static extern bool Wow64RevertWow64FsRedirection(IntPtr ptr);private const UInt32 WM_SYSCOMMAND = 0x112;private const UInt32 SC_RESTORE = 0xf120;[DllImport("user32.dll", CharSet = CharSet.Auto)]static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);private const string OnScreenKeyboadApplication = "osk.exe";/// <summary>/// 启用系统软键盘/// </summary>public static void OpenKeyBoardFun(){try{//判断软键盘是否进程是否已经存在，如果不存在进行调用Process[] pro = Process.GetProcessesByName("osk");//如果键盘已打开，则进行关闭操作if (pro != null && pro.Length > 0){CloseKeyBoardFun();return;}// Get the name of the On screen keyboardstring processName = System.IO.Path.GetFileNameWithoutExtension(OnScreenKeyboadApplication);var processList = new List<Process>(Process.GetProcesses());// Check whether the application is not running var query = processList.FindAll((u) => u.ProcessName== processName);Process keyboardProcess=null;if (query!=null&&query.Count>0){keyboardProcess = query[0];}// launch it if it doesn't existif (keyboardProcess == null){IntPtr ptr = new IntPtr(); ;bool sucessfullyDisabledWow64Redirect = false;// Disable x64 directory virtualization if we're on x64,// otherwise keyboard launch will fail.if (Is64BitOperatingSystem){sucessfullyDisabledWow64Redirect = Wow64DisableWow64FsRedirection(ref ptr);}// osk.exe is in windows/system folder. So we can directky call it without pathusing (Process osk = new Process()){osk.StartInfo.FileName = OnScreenKeyboadApplication;osk.Start();//osk.WaitForInputIdle(2000);}// Re-enable directory virtualisation if it was disabled.if (Is64BitOperatingSystem)if (sucessfullyDisabledWow64Redirect)Wow64RevertWow64FsRedirection(ptr);}else{// Bring keyboard to the front if it's already runningvar windowHandle = keyboardProcess.MainWindowHandle;SendMessage(windowHandle, WM_SYSCOMMAND, new IntPtr(SC_RESTORE), new IntPtr(0));}}catch (Exception ex){Console.WriteLine(ex.Message);Console.WriteLine(ex.StackTrace);//LogUtil.WriteLog(MethodBase.GetCurrentMethod().Name, LogUtil.ERROE, ex.Message);//LogUtil.WriteLog(MethodBase.GetCurrentMethod().Name, LogUtil.ERROE, ex.StackTrace);}}/// <summary>/// 关闭系统软键盘/// </summary>public static void CloseKeyBoardFun(){try{Process[] pros = Process.GetProcessesByName("osk");foreach (Process p in pros){p.Kill();}}catch (Exception ex){Console.WriteLine(ex.Message);Console.WriteLine(ex.StackTrace);//LogUtil.WriteLog(MethodBase.GetCurrentMethod().Name, LogUtil.ERROE, ex.Message);//LogUtil.WriteLog(MethodBase.GetCurrentMethod().Name, LogUtil.ERROE, ex.StackTrace);}}private static bool Is64BitOperatingSystem{get{try{string addressWidth = String.Empty;ConnectionOptions mConnOption = new ConnectionOptions();ManagementScope mMs = new ManagementScope("//localhost", mConnOption);ObjectQuery mQuery = new ObjectQuery("select AddressWidth from Win32_Processor");ManagementObjectSearcher mSearcher = new ManagementObjectSearcher(mMs, mQuery);ManagementObjectCollection mObjectCollection = mSearcher.Get();foreach (ManagementObject mObject in mObjectCollection){addressWidth = mObject["AddressWidth"].ToString();}return addressWidth == "64";}catch (Exception ex){return false;}}}}}

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