Prevent runing same executable

[rchrishantha]

Hi
I created a C# sharp application and it has no threads. I want prevent someone executing the same application if it is currently executing.

Thanks
Reginold

[DaleCo2k]

Use this code in your Main() function:

static void Main()
{
string procName = Application.ProductName;
System.Diagnostics.Process[] myProcesses
= System.Diagnostics.Process.GetProcessesByName(procName);

if (myProcesses.Length > 1)
{
MessageBox.Show("Application Already Open");
return;
}

// Now start the application
Application.Run(new Form1());
}

[MadHatter]

Hi
I created a C# sharp application and it has no threads. I want prevent someone executing the same application if it is currently executing.

Thanks
Reginold

if your app has no threads, thats pretty much going to guarantee that no one will be able to use it, because any running app is going to be on *some* thread.

[jhammer]

Here is another idea:

using System.Threading
using System.Runtime.InteropServices;
public class Form1 : Form
{
     [STAThread]
     static void Main() 
     {
          bool createdNew;
          Mutex m = new Mutex(true, "YourAppName", out createdNew);
          if (! createdNew)
          {
               // app is already running...
               MessageBox.Show("Only one instance of this application is allowed at a time.");
               return;
          }
          Application.Run(new Form1());
          // keep the mutex reference alive until the normal termination of the program
          GC.KeepAlive(m);
     }
}

The next section will close the PREVIOUS instance of the application:

using System;
using System.ComponentModel;
using System.Diagnostics;

 

static void Main() 
{
      // get the name of the current process
      Process currentProcess = Process.GetCurrentProcess();
      string currProcessName = currentProcess.ProcessName;

      // get all instances of the this application
      Process[] prevAppInstance = Process.GetProcessesByName(currProcessName);
   
      // kill all other instances of this application
      for(int i = 0 ; i<prevAppInstance.GetLength(0) ; i++)
      {
              if(prevAppInstance[i].Id != currentProcess.Id)
              {
                      prevAppInstance[i].Kill();
               }
      }

      // run the aplication
      Application.Run(new Form1());
}

[mehdi62b]

or this one,

static void Main()
Int32 isProcessRunning;
isProcessRunning = System.Diagnostics.Process.GetProcessesByName(
  System.Diagnostics.Process.GetCurrentProcess().ProcessName).Length;
if(isProcessRunning != 1)
{
  MessageBox.Show("Already an Instance running");
}
else
{
  Application.Run(new Form1());
}

[cjard]

if your app has no threads, thats pretty much going to guarantee that no one will be able to use it, because any running app is going to be on *some* thread.

rofl..