using System;
using System.Xml;
using System.ComponentModel ;
using System.Windows.Forms;
using System.Diagnostics;
using System.Runtime;
using System.Reflection;
using System.Runtime.InteropServices;
[STAThread]
static void Main() //主程序运行
{
Process intance=RunningIntance(); //调用检查函数
if(intance==null) //不存在相同的程序
{
Application.Run(new frmMain());
}
else //存在相同的程序
{
HandleRunningInstance(intance);
}
}
private static Process RunningIntance()
{
Process currentProcess=Process.GetCurrentProcess();
Process [] processCollection=Process.GetProcessesByName(currentProcess.ProcessName);
foreach(Process p in processCollection)
{
if(p.Id!=currentProcess.Id) //检查ID是否相同
{
//检查运行文件路径是否相同
if(Assembly.GetExecutingAssembly().Location.Replace("/","\")==currentProcess.MainModule.FileName)
return currentProcess;
}
}
return null;
}
private static void HandleRunningInstance(Process instance)
{
MessageBox.Show("该应用系统（PSP）已经在运行！","提示信息",MessageBoxButtons.OK,MessageBoxIcon.Information);
ShowWindowAsync(instance.MainWindowHandle,1); //调用api函数，正常显示窗口
SetForegroundWindow(instance.MainWindowHandle); //将窗口放置最前端。
}
[DllImport("User32.dll")]
private static extern bool ShowWindowAsync(System.IntPtr hWnd, int cmdShow);
[DllImport("User32.dll")]
private static extern bool SetForegroundWindow(System.IntPtr hWnd);
