running from command prompt

[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

[Jon Skeet [C# MVP]]

Xarky <be*********@yahoo.com> wrote:

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.

Well, how far have you got? You definitely need to use Process, and
possibly ProcessStartInfo.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[xarky]

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.

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[Jon Skeet [C# MVP]]

xarky <nospam@in_the_sea.kills.xarky> wrote:

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.

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.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too