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How to display console stream data in ASP.NET?

Posted on 2007-12-05
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Last Modified: 2008-02-01
I just asked a similar question about displaying console output to a ASP.NET textbox and that did the trick.  However, I am using the following lines:

System.Diagnostics.Process p = System.Diagnostics.Process.Start(info);
this.txtStatus.Text = p.StandardOutput.ReadToEnd();

This appears to wait until the entire process is done before showing any output.  Is there someway to get it to display dynamically, i.e., whenever something is output from the console?   This is very urgent, so I appreciate your help!
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Question by:jvalescu
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6 Comments
 
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Expert Comment

by:Jens Fiederer
ID: 20413745
Well you ASKED to "ReadToEnd", so it MUST wait until the process is done!

Have you tried Readline instead?  

Of course, you won't get it ALL that way.

What results are you trying to achieve?
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by:jvalescu
ID: 20413802
Yes, I tried Readline and got the same result.  I'm thinking that somehow a threading solution must be applied.
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Assisted Solution

by:Jens Fiederer
Jens Fiederer earned 500 total points
ID: 20413847
If you have some control over the process you are calling, you can have it flush its output after every line, and Readline should get you the first line at least.


A threading solution doesn't work in the CLASSIC web scenario, but COULD be made to work in an AJAX context, where you serve up the page with an EMPTY textbox to start with, but initiate a request that feeds you text as it is generated.
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Author Comment

by:jvalescu
ID: 20414031
Any easy example or link for more info on the AJAX method?
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Accepted Solution

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Jens Fiederer earned 500 total points
ID: 20414109
There is a tutorial at
http://www.w3schools.com/ajax/default.asp

and
http://ajaxpatterns.org/Ajax_Examples

has a variety of examples of using AJAX.

I don't know of any for your SPECIFIC problem, and a lot depends on the nature of the process that is running - if the buffer is never flushed until the process is closed, you might just as well redirect the output into a file and provide a SEPARATE page to allow the user to look the last (or one of a set of) output files later when the process is finished.
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Expert Comment

by:naveenkohli
ID: 20414539
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