wait for process

[Guest greifedc]

I am looping system.diagnostics.process.start this code works when I put a break in the code and single step it thru waiting for each line to finish. but if I don't use a break or step it thru quickly the process I am trying to start doesn't have a chance to finish the first time around before it loops and is ready to start again. Is there a way to make it wait for a process before moving on to the next?

 

Dim ProgramsSelected As Int16

Dim count As Int16 = 0

ProgramsSelected = newProgramList.SelectedItems.Count

Do

count += 1

System.Diagnostics.Process.Start _(newProgramList.SelectedItem)

newProgramList.SetSelected _(newProgramList.SelectedIndex, False)

Loop Until count = ProgramsSelected

 

:confused:

[PlausiblyDamp]

try altering to the following code.

Notice the p.WaitForExit method after p.Start

 

Dim ProgramsSelected As Int16
Dim count As Int16 = 0
ProgramsSelected =  newProgramList.SelectedItems.Count

Do
   count += 1

Dim p As New  System.Diagnostics.Process()
		p.Start(newProgramList.SelectedItem)
		p.WaitForExit()

newProgramList.SetSelected _(newProgramList.SelectedIndex, False)
	Loop Until count = ProgramsSelected

[divil]

A nicer way would be to use the event-driven method:

 

   Dim WithEvents myProcess As Process

   Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
       myProcess = Process.Start("c:\windows\notepad.exe")
       myProcess.EnableRaisingEvents = True
   End Sub

   Private Sub myProcess_Exited(ByVal sender As Object, ByVal e As System.EventArgs) Handles myProcess.Exited
       MessageBox.Show("Exited!")
   End Sub

[Rick_Fla]

A nicer way would be to use the event-driven method:

 

   Dim WithEvents myProcess As Process

   Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
       myProcess = Process.Start("c:\windows\notepad.exe")
       myProcess.EnableRaisingEvents = True
   End Sub

   Private Sub myProcess_Exited(ByVal sender As Object, ByVal e As System.EventArgs) Handles myProcess.Exited
       MessageBox.Show("Exited!")
   End Sub

 

If I understand this correctly, the process will not fire again until it is completed? Even if it is in a loop? I have an application that downloads an unknow number of files, has to decrypt each one, then process them. So as long as I use this, it should wait for the process to complete on each file?