用如下方法可以保证应用程序只运行一个实例。
添加引用
using
System.Reflection;
using System.Runtime.InteropServices;
using System.Diagnostics;
调用DLL文件using System.Runtime.InteropServices;
using System.Diagnostics;
[DllImport(
"
User32.dll
"
)]
private static extern bool ShowWindowAsync(IntPtr hWnd, int cmdShow);
[DllImport( " User32.dll " )]
private static extern bool SetForegroundWindow(IntPtr hWnd);
private const int WS_SHOWNORMAL = 1 ;
添加如下两个函数private static extern bool ShowWindowAsync(IntPtr hWnd, int cmdShow);
[DllImport( " User32.dll " )]
private static extern bool SetForegroundWindow(IntPtr hWnd);
private const int WS_SHOWNORMAL = 1 ;
public
static
Process RunningInstance()
{
Process current = Process.GetCurrentProcess();
Process[] processes = Process.GetProcessesByName(current.ProcessName);
// Loop through the running processes in with the same name
foreach (Process process in processes)
{
// Ignore the current process
if (process.Id != current.Id)
{
// Make sure that the process is running from the exe file.
if (Assembly.GetExecutingAssembly().Location.Replace( " / " , " \\ " ) ==
current.MainModule.FileName)
{
// Return the other process instance.
return process;
}
}
}
// No other instance was found, return null.
return null ;
}
public static void HandleRunningInstance(Process instance)
{
// Make sure the window is not minimized or maximized
ShowWindowAsync(instance.MainWindowHandle, WS_SHOWNORMAL);
// Set the real intance to foreground window
SetForegroundWindow(instance.MainWindowHandle);
}
{
Process current = Process.GetCurrentProcess();
Process[] processes = Process.GetProcessesByName(current.ProcessName);
// Loop through the running processes in with the same name
foreach (Process process in processes)
{
// Ignore the current process
if (process.Id != current.Id)
{
// Make sure that the process is running from the exe file.
if (Assembly.GetExecutingAssembly().Location.Replace( " / " , " \\ " ) ==
current.MainModule.FileName)
{
// Return the other process instance.
return process;
}
}
}
// No other instance was found, return null.
return null ;
}
public static void HandleRunningInstance(Process instance)
{
// Make sure the window is not minimized or maximized
ShowWindowAsync(instance.MainWindowHandle, WS_SHOWNORMAL);
// Set the real intance to foreground window
SetForegroundWindow(instance.MainWindowHandle);
}
在MAIN中添加如下代码
public static void Main()
{
Process instance = RunningInstance() ;
if (instance == null)
{
Application.Run(new Form1()) ;
}
else
{
HandleRunningInstance(instance) ;
}
}
{
Process instance = RunningInstance() ;
if (instance == null)
{
Application.Run(new Form1()) ;
}
else
{
HandleRunningInstance(instance) ;
}
}