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Waiting for process end , how?Process.start("Mydoc.doc") starts Word with the file. I need to wait for
Word to be closed before more code can execute in my app. How can I do this? Thanks for any help Bob Bob,
How about to use the wait for exit in the process class to wait on the exit of that process. :-) http://msdn2.microsoft.com/en-us/library/fb4aw7b8.aspxI hope this helps, Cor Show quoteHide quote "Bob" <bduf***@sgiims.com> schreef in bericht news:uSv4E59vGHA.3392@TK2MSFTNGP04.phx.gbl... > Process.start("Mydoc.doc") starts Word with the file. I need to wait for > Word to be closed before more code can execute in my app. How can I do > this? > > Thanks for any help > Bob > I been trying to do that with the following code
Dim pr As Process pr.Start(Fname) where Fname is the filename to use with the process. However I get a message in the IDE saying that Access of Shared member, constant member.... etc. qualifying expression will not be evaluated. Got any code snippets to do this? It seems straightforward but <GGGG> :-) Thanks for your help. Bob Show quoteHide quote "Cor Ligthert [MVP]" <notmyfirstn***@planet.nl> wrote in message news:ev8wQ89vGHA.4932@TK2MSFTNGP06.phx.gbl... > Bob, > > How about to use the wait for exit in the process class to wait on the > exit of that process. > > :-) > > http://msdn2.microsoft.com/en-us/library/fb4aw7b8.aspx > > I hope this helps, > > Cor > > > "Bob" <bduf***@sgiims.com> schreef in bericht > news:uSv4E59vGHA.3392@TK2MSFTNGP04.phx.gbl... >> Process.start("Mydoc.doc") starts Word with the file. I need to wait for >> Word to be closed before more code can execute in my app. How can I do >> this? >> >> Thanks for any help >> Bob >> > > Bob wrote:
> I been trying to do that with the following code Bob - here is a simple console application that demonstrates this> Dim pr As Process > > pr.Start(Fname) where Fname is the filename to use with the process. > > However I get a message in the IDE saying that Access of Shared member, > constant member.... etc. qualifying expression will not be evaluated. > > Got any code snippets to do this? It seems straightforward but <GGGG> :-) > > Thanks for your help. > > Bob method: Option Explicit On Option Strict On Imports System Imports System.Diagnostics Module Module1 Public Sub Main() Dim p As Process = Process.Start("notepad.exe") p.WaitForExit() Console.WriteLine("Done") End Sub End Module This is a blocking operation... Another way to do this, whithout blocking would be: Option Explicit On Option Strict On Imports System Imports System.Threading Imports System.Diagnostics Module Module1 Private WithEvents p As New Process Private exited As Boolean = False Public Sub Main() p.EnableRaisingEvents = True p.StartInfo.FileName = "notepad.exe" p.Start() While Not exited Thread.Sleep(1000) Console.WriteLine("Running!") End While Console.WriteLine("Done") End Sub Private Sub NotepadExited(ByVal sender As Object, ByVal e As EventArgs) Handles p.Exited exited = True End Sub End Module Anwyay - HTH, -- Tom Shelton [MVP] Tom,
Exciting :-) CorShow quoteHide quote "Tom Shelton" <t**@mtogden.com> schreef in bericht news:1155659311.605212.36440@74g2000cwt.googlegroups.com... > > Bob wrote: >> I been trying to do that with the following code >> Dim pr As Process >> >> pr.Start(Fname) where Fname is the filename to use with the process. >> >> However I get a message in the IDE saying that Access of Shared member, >> constant member.... etc. qualifying expression will not be evaluated. >> >> Got any code snippets to do this? It seems straightforward but <GGGG> :-) >> >> Thanks for your help. >> >> Bob > > Bob - here is a simple console application that demonstrates this > method: > > Option Explicit On > Option Strict On > > Imports System > Imports System.Diagnostics > > Module Module1 > > Public Sub Main() > Dim p As Process = Process.Start("notepad.exe") > p.WaitForExit() > Console.WriteLine("Done") > End Sub > > End Module > > > This is a blocking operation... Another way to do this, whithout > blocking would be: > > Option Explicit On > Option Strict On > > Imports System > Imports System.Threading > Imports System.Diagnostics > > Module Module1 > Private WithEvents p As New Process > Private exited As Boolean = False > > Public Sub Main() > p.EnableRaisingEvents = True > p.StartInfo.FileName = "notepad.exe" > p.Start() > > While Not exited > Thread.Sleep(1000) > Console.WriteLine("Running!") > End While > > Console.WriteLine("Done") > End Sub > > Private Sub NotepadExited(ByVal sender As Object, ByVal e As > EventArgs) Handles p.Exited > exited = True > End Sub > > End Module > > Anwyay - HTH, > > -- > Tom Shelton [MVP] > Thanks Tom Gonna give it a try.
Bob Show quoteHide quote "Tom Shelton" <t**@mtogden.com> wrote in message news:1155659311.605212.36440@74g2000cwt.googlegroups.com... > > Bob wrote: >> I been trying to do that with the following code >> Dim pr As Process >> >> pr.Start(Fname) where Fname is the filename to use with the process. >> >> However I get a message in the IDE saying that Access of Shared member, >> constant member.... etc. qualifying expression will not be evaluated. >> >> Got any code snippets to do this? It seems straightforward but <GGGG> :-) >> >> Thanks for your help. >> >> Bob > > Bob - here is a simple console application that demonstrates this > method: > > Option Explicit On > Option Strict On > > Imports System > Imports System.Diagnostics > > Module Module1 > > Public Sub Main() > Dim p As Process = Process.Start("notepad.exe") > p.WaitForExit() > Console.WriteLine("Done") > End Sub > > End Module > > > This is a blocking operation... Another way to do this, whithout > blocking would be: > > Option Explicit On > Option Strict On > > Imports System > Imports System.Threading > Imports System.Diagnostics > > Module Module1 > Private WithEvents p As New Process > Private exited As Boolean = False > > Public Sub Main() > p.EnableRaisingEvents = True > p.StartInfo.FileName = "notepad.exe" > p.Start() > > While Not exited > Thread.Sleep(1000) > Console.WriteLine("Running!") > End While > > Console.WriteLine("Done") > End Sub > > Private Sub NotepadExited(ByVal sender As Object, ByVal e As > EventArgs) Handles p.Exited > exited = True > End Sub > > End Module > > Anwyay - HTH, > > -- > Tom Shelton [MVP] > Thanks Tom,
Excellent info for me. I've been testing the first snippet of code using Word instead of Notepad Dim pr As Process = Process.Start("Mydoc.doc") 'Starts Word and opens the file OK pr.WaitForExit() Console.WriteLine("Done") However when execution hits the line p.WaitForExit() I get an unhandled exception Object not set to an instance of an object. Normally this means that I did not instantiate the pr object and indeed the code does not do that (it would need the New keyword in he declaration) however with this shared class you can not use the new keyword in the declaration. How could I end up gettng Word to open up and have to wait before going back to my application form that the process is closed. I look at the docs and I see that Waitforexit does interrupt the calling thread and this is indeed whats needed. I just don't see how to code it. Any help is really, really appreciated. Bob Show quoteHide quote "Tom Shelton" <t**@mtogden.com> wrote in message news:1155659311.605212.36440@74g2000cwt.googlegroups.com... > > Bob wrote: >> I been trying to do that with the following code >> Dim pr As Process >> >> pr.Start(Fname) where Fname is the filename to use with the process. >> >> However I get a message in the IDE saying that Access of Shared member, >> constant member.... etc. qualifying expression will not be evaluated. >> >> Got any code snippets to do this? It seems straightforward but <GGGG> :-) >> >> Thanks for your help. >> >> Bob > > Bob - here is a simple console application that demonstrates this > method: > > Option Explicit On > Option Strict On > > Imports System > Imports System.Diagnostics > > Module Module1 > > Public Sub Main() > Dim p As Process = Process.Start("notepad.exe") > p.WaitForExit() > Console.WriteLine("Done") > End Sub > > End Module > > > This is a blocking operation... Another way to do this, whithout > blocking would be: > > Option Explicit On > Option Strict On > > Imports System > Imports System.Threading > Imports System.Diagnostics > > Module Module1 > Private WithEvents p As New Process > Private exited As Boolean = False > > Public Sub Main() > p.EnableRaisingEvents = True > p.StartInfo.FileName = "notepad.exe" > p.Start() > > While Not exited > Thread.Sleep(1000) > Console.WriteLine("Running!") > End While > > Console.WriteLine("Done") > End Sub > > Private Sub NotepadExited(ByVal sender As Object, ByVal e As > EventArgs) Handles p.Exited > exited = True > End Sub > > End Module > > Anwyay - HTH, > > -- > Tom Shelton [MVP] > Bob wrote:
Show quoteHide quote > Thanks Tom, Bob - the example I wrote works fine for me... With word as well. I> Excellent info for me. > I've been testing the first snippet of code using Word instead of Notepad > Dim pr As Process = Process.Start("Mydoc.doc") 'Starts Word and opens the > file OK > pr.WaitForExit() > Console.WriteLine("Done") > However when execution hits the line p.WaitForExit() I get an unhandled > exception Object not set to an instance of an object. Normally this means > that I did not instantiate the pr object and indeed the code does not do > that (it would need the New keyword in he declaration) however with this > shared class you can not use the new keyword in the declaration. > > How could I end up gettng Word to open up and have to wait before going back > to my application form that the process is closed. I look at the docs and I > see that Waitforexit does interrupt the calling thread and this is indeed > whats needed. I just don't see how to code it. > > Any help is really, really appreciated. > > Bob just tested it here with word to be certain. The call to process.start returns an instance of the process class, so there is no shared methods involved. You do not call this on the Process class, but on the instance returned by the Process.Start method. I think what we need is the shortest snippet of ACTUAL code that demonstrates the issue, since I can not replicate this problem. -- Tom Shelton [MVP] 
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