C# - Capturing Windows Application Output

Question

My application launches "C:\Windows\System32\Msra.Exe" to control a domaincomputer. Is there a way I can capture the error messages that this msra.Exe shows. (I.e. internal error messages from the msra.exe and not the ones from my app.) The app itself is a windows Forms app.

Any help is appreciated.

The Code to start MSRA is below... it is just a snippet of the complete application.

string msra = "C:\\Windows\\System32\\runas.exe";

string domainname = "**********";
string domaincontroller = "*************";

if (File.Exists(msra) == false)
{
    System.Windows.Forms.MessageBox.Show("Runas.exe not found.\n\rPlease contact your internal IT support.", "Fatal Error", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Error);
}
else
{
    try
    {
        Process p = new Process();
        p.StartInfo.UseShellExecute = true;
        p.StartInfo.WindowStyle = ProcessWindowStyle.Normal;
        p.StartInfo.ErrorDialog = true;
        p.StartInfo.FileName = msra;
        p.StartInfo.Arguments = "/noprofile /netonly /user:" + domainname + "\\" + username + " \"cmd /server:" + domaincontroller + " /C msra.exe /offerra " + computerip + "\"";
        p.Start();
        p.Dispose();
        Thread.Sleep(1700);
        SendKeys.SendWait(password);
        SendKeys.SendWait("{ENTER}");
    }
    catch
    {
        System.Windows.Forms.MessageBox.Show("MSRA could not be started for an unknown reason");
    }
}

possible duplicate of [Redirect console output to textbox in separate program C#](http://stackoverflow.com/questions/415620/redirect-console-output-to-textbox-in-separate-program-c-sharp) — tenfour, Oct 24 '11 at 15:05

Ross Dargan · Answer 1 · 2011-10-24T15:09:34.830

2

You need to http://msdn.microsoft.com/en-us/library/system.diagnostics.process.standardoutput.aspx

[Updated to point to a .net example]

edited Oct 24 '11 at 15:09

answered Oct 24 '11 at 15:01

Ross Dargan

5,876
4
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score 2 · Accepted Answer · answered Oct 24 '11 at 15:04

2

You can set RedirectStandardOutput or RedirectStandardError to true to be able to read from the standard output or error output of the process.

You then have several options how to actually read the data:

use StandardOutput property
subsribe to the OutputDataReceived event and call BeginOutputReadLine()

Or the corresponding members for the error stream.

answered Oct 24 '11 at 15:04

svick

236,525
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Thanks - This is indeed the way to proceed. – XikiryoX Oct 24 '11 at 15:13

score 1 · Answer 3 · answered Oct 24 '11 at 15:09

1

You are using Process so try the Process.StandardError property. You assign it a stream and you will be able to use it.

http://msdn.microsoft.com/en-us/library/system.diagnostics.process.standarderror.aspx

And while you're there you can also use Process.StandardOutput

http://msdn.microsoft.com/en-us/library/system.diagnostics.process.standardoutput.aspx

answered Oct 24 '11 at 15:09

Khan

516
11
24

Thanks - This is indeed the way to proceed. – XikiryoX Oct 24 '11 at 15:14

C# - Capturing Windows Application Output

3 Answers3

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