C# Process Events

C# Process Events

• J.C.

  That line of code you gave me allows the events to be triggered but it has also caused some other problems
  
  After the event has been triggered I am unable to change any of the properties of the form objects. It says that they were created in another thread.
  
  I am using a P4 with hyperthreadign but I have not been doin any thread programming. I tried running the program with CheckForIllegalCrossThreadCalls = false
  the program could run but when i tried opening a new form from the event funtion (or from a function called by the event function) the form would not load properly and would stop responding
  
  Does anyone have an ideas what is causing this and what the processes have to do with it.
  
  Thanks.
  

• Dmitry_

  It is because the events are being run on another thread you have to push the calls back to the main thread using control.invoke() http://weblogs.asp.net/justin_rogers/articles/126345.aspx includes a detailed explanation.

  
  

• mscheuner_garaio

  Right I forgot about .NET framework...
  well it must be something else making my app crash on the old P3 computer then
  
  Thanks for the help
  

• Krista

  I am having the same kind of problem. I have a form with a button and a progressbar. I am using Process.Start() for two(2) processes under the button_Click() event. What I want to do is to show the status through progrssbar after each process is completed. I am using WaitForExit() for the process to exit. But the prgress bar does not get updated after each call to Process.Start() . It looks like that the main form looses the focus when a process is started and never gets it back untill all the processes are completed.

  I tried this.Active() on the form after WaitForExit(), it didn't work out.

  I tried

  prcA1.Exited += new EventHandler(ProcessExitedEvent), but it did not work either.

  Any clue how to update the progress bar on the form after each Processs.Start() call.

  Here is the sample code: with Progressbar1.Step =25;

  private void Install_Click(object sender, System.EventArgs e)

  {

  // FPM Installation

  Process prcA1 = Process.Start(@"A1.exe");

  //prcA1.Exited += new EventHandler(ProcessExitedEvent);

  //prcA1.EnableRaisingEvents = true;

  prcA1.WaitForExit();

  this.Activate();

  progressBar1.PerformStep();

  // Driver Installation

  Process prcB1 = Process.Start(@"B1.exe");

  // prcB1.Exited += new EventHandler(ProcessExitedEvent);

  // prcB1.EnableRaisingEvents = true;

  prcDriverB1.WaitForExit();

  progressBar1.PerformStep();

  // Driver Installation

  Process prcC1 = Process.Start(@"C1.exe");

  // prcC1.Exited += new EventHandler(ProcessExitedEvent);

  // prcC1.EnableRaisingEvents = true;

  prcC1.WaitForExit();

  progressBar1.PerformStep();

  // Driver Installation

  Process prcD1 = Process.Start(@"D1.exe");

  // prcD1.Exited += new EventHandler(ProcessExitedEvent);

  // prcD1.EnableRaisingEvents = true;

  prcD1.WaitForExit();

  progressBar1.PerformStep();

  }

  //private void ProcessExitedEvent(object sender, System.EventArgs e)

  //{

  //this.Activate();

  //progressBar1.PerformStep();

  //}

  
  

• SamCKayak

  That works
  
  Thanks for the tip
  

• geanyee

  All computers that run a .NET environment support multiple threads.

  
  

• kenlefeb

  Try setting the Process.EnableRaisingEvents property to true.
  
  

• meatz

  OK that makes sence
  but is there a way to run the events on the same thread
  and if not what is the result if the program was run on a computer without multi-threading capabilities
  
  I am not sure of the systems that will be running this program so I would like to keep it single threaded if possible
  
• C# Process Events