C# 程序重复启动，将程序显示到最前
/// <summary>
/// 进程辅助助手,检查程序是否重复启动，
/// 重复启动的话，就将上一个程序显示出来到UI上面
/// </summary>
public class ProcessHelper
{
/// <summary>
/// 命名互斥体
/// </summary>
public static Mutex mutex;
/// <summary>
/// 给定一个唯一的name值，检查程序是否重复启动
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public static bool CheckProgramRepeat()
{
// 获取当前进程的 Process 实例
Process currentProcess = Process.GetCurrentProcess();
// 获取当前进程的名称
string processName = currentProcess.ProcessName;
mutex = new Mutex(true, processName, out bool createNew);
if (!createNew)
{
ShowProcess(currentProcess);
return true;
}
return false;
}
[DllImport("user32.dll")]
static extern bool SetForegroundWindow(IntPtr hWnd);
[DllImport("user32.dll")]
static extern bool IsIconic(IntPtr hWnd);
[DllImport("user32.dll")]
static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
const int SW_RESTORE = 9;
/// <summary>
/// 显示程序
/// </summary>
public static void ShowProcess(Process currentProcess)
{
// 已经有一个实例在运行，找到并将其窗口置于前台
foreach (Process process in Process.GetProcessesByName(currentProcess.ProcessName))
{
if (process.Id != currentProcess.Id)
{
IntPtr mainWindowHandle = process.MainWindowHandle;
// 检查窗口是否最小化，如果是，则恢复窗口
if (IsIconic(mainWindowHandle))
{
ShowWindow(mainWindowHandle, SW_RESTORE);
}
SetForegroundWindow(process.MainWindowHandle);
break;
}
}
}
}