C# 调用系统软键盘

using RetailApp.Core.Utils;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace RetailApp.Core.SystemUtils
{
/// <summary>
/// 触摸键盘工具类
/// </summary>
class TouchKeyBoard
{
[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 keyboard
string processName = System.IO.Path.GetFileNameWithoutExtension(OnScreenKeyboadApplication);

// Check whether the application is not running
var query = from process in Process.GetProcesses()
where process.ProcessName == processName
select process;

var keyboardProcess = query.FirstOrDefault();

// launch it if it doesn’t exist
if (keyboardProcess == null)
{
IntPtr ptr = new IntPtr(); ;
bool sucessfullyDisabledWow64Redirect = false;

// Disable x64 directory virtualization if we’re on x64,
// otherwise keyboard launch will fail.
if (System.Environment.Is64BitOperatingSystem)
{
sucessfullyDisabledWow64Redirect = Wow64DisableWow64FsRedirection(ref ptr);
}

// osk.exe is in windows/system folder. So we can directky call it without path
using (Process osk = new Process())
{
osk.StartInfo.FileName = OnScreenKeyboadApplication;
osk.Start();
//osk.WaitForInputIdle(2000);
}

// Re-enable directory virtualisation if it was disabled.
if (System.Environment.Is64BitOperatingSystem)
if (sucessfullyDisabledWow64Redirect)
Wow64RevertWow64FsRedirection(ptr);
}
else
{
// Bring keyboard to the front if it’s already running
var windowHandle = keyboardProcess.MainWindowHandle;
SendMessage(windowHandle, WM_SYSCOMMAND, new IntPtr(SC_RESTORE), new IntPtr(0));
}

}
catch (Exception ex)
{
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)
{
LogUtil.WriteLog(MethodBase.GetCurrentMethod().Name, LogUtil.ERROE, ex.Message);
LogUtil.WriteLog(MethodBase.GetCurrentMethod().Name, LogUtil.ERROE, ex.StackTrace);
}

}

}

}
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版权声明：本文为CSDN博主「___z_h_a_o」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/u011267225/article/details/113555866