running from command prompt

  • Thread starter Thread starter Xarky
  • Start date Start date
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Xarky

Hi,
I am writing a program, and need to execute a part of it in command
prompt.

When I execute it in command prompt, I type the following
c:\> id3tag.exe music.wma show
and it returns for me an XML file.

How can I do that in C#. I was trying to do that by using the Process
object but got lost.


Thanks in Advance
 
Xarky said:
I am writing a program, and need to execute a part of it in command
prompt.

When I execute it in command prompt, I type the following
c:\> id3tag.exe music.wma show
and it returns for me an XML file.

How can I do that in C#. I was trying to do that by using the Process
object but got lost.
Click to expand...

Well, how far have you got? You definitely need to use Process, and
possibly ProcessStartInfo.
 
Hi,
I was trying the following

Process wmaProcess = new Process();
string filePath, musicPath, xmlFile;

// contains the path for the program to be executed
filePath = Application.StartupPath+@"\id3tag.exe";
// contains the path for the music file
musicPath = this.musicPath + "\\" + this.musicName;
wmaProcess.StartInfo.FileName = filePath;
wmaProcess.StartInfo.Arguments = musicPath+" show";
wmaProcess.StartInfo.CreateNoWindow = true;
wmaProcess.StartInfo.UseShellExecute = false;
wmaProcess.Start();
wmaProcess.WaitForExit();
xmlFile = wmaProcess.StandardOutput.ReadToEnd();

My program is failing on the last line. It is giving me the following
error -

An unhandled exception of type 'System.InvalidOperationException'
occurred in system.dll

Additional information: StandardError has not been redirected.
 
xarky said:
I was trying the following

Process wmaProcess = new Process();
string filePath, musicPath, xmlFile;

// contains the path for the program to be executed
filePath = Application.StartupPath+@"\id3tag.exe";
// contains the path for the music file
musicPath = this.musicPath + "\\" + this.musicName;
wmaProcess.StartInfo.FileName = filePath;
wmaProcess.StartInfo.Arguments = musicPath+" show";
wmaProcess.StartInfo.CreateNoWindow = true;
wmaProcess.StartInfo.UseShellExecute = false;
wmaProcess.Start();
wmaProcess.WaitForExit();
xmlFile = wmaProcess.StandardOutput.ReadToEnd();

My program is failing on the last line. It is giving me the following
error -

An unhandled exception of type 'System.InvalidOperationException'
occurred in system.dll

Additional information: StandardError has not been redirected.
Click to expand...

Are you sure it's not saying that StandardOutput has not been
redirected? Either way, if you're going to try to read from
StandardOutput, then:

a) You should be reading from it *before* your call to WaitForExit,
otherwise the buffer might end up being blocked

b) You must tell the StartInfo to redirect standard output.
 
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