Visual C# GUI stops responding when process.WaitForExit(); is used

Question

I am creating a GUI application using Visual C# 2005 (net framework 2). I use the following code to start a process:

Process process = new Process();
process         


        

Answer 1

the solution for this is using a multi-threading start by adding:

using System.Threading;

then look at the code bellow :

    Process process = new Process();
    process.StartInfo = new ProcessStartInfo("app.exe");
    process.StartInfo.WorkingDirectory = "";
    process.StartInfo.Arguments = "some arguments";

//starts a new thread that starts the process so when you call WaitForExit it does not freez the main thread

    Thread th= new Thread(() =>
    {
        process.Start();
        process.WaitForExit();
    });
    th.Start();

if you want to run multiple process back to back it is another case you will need to use something like a List of process look at the code bellow

    List processes = new List();;

    Process process = new Process();
    process.StartInfo = new ProcessStartInfo("app.exe");
    process.StartInfo.WorkingDirectory = "";
    process.StartInfo.Arguments = "some arguments";

    processes.Add(process); 

// i add another one manually but you can use a loop for exemple

    Process process2 = new Process();
    process.StartInfo = new ProcessStartInfo("app.exe");
    process.StartInfo.WorkingDirectory = "";
    process.StartInfo.Arguments = "some arguments";

    processes.Add(process2);

// then you will start them though your thread and the 2nd process will wait till the first finishes without blocking the UI

    Thread th= new Thread(() =>
    {
            for (int i = 0; i < processes.Count; i++)
            {
                    processes[i].Start();
                    processes[i].WaitForExit();
             }
    });
    th.Start();