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POWrapper for a Command Line Tool in C#
 

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  1. POWrapper for a Command Line Tool in C#
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    <p>Using <a href="http://support.microsoft.com/kb/305994" rel="noreferrer">MSDN</a> I got the class to write a wrapper for my command line tool. </p> <p>I now am facing a problem, if I execute the exe through the command line with arguments, it works perfect without any errors.</p> <p>But when I try to pass the arguments from the Wrapper it crashes the program.</p> <p>Wanted to know if I am passing the arguments properly and if I am wrong, could somebody point out please. This is the LaunchEXE class from MSDN</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Diagnostics; using System.IO; namespace SPDB { /// &lt;summary&gt; /// Class to run any external command line tool with arguments /// &lt;/summary&gt; public class LaunchEXE { internal static string Run(string exeName, string argsLine, int timeoutSeconds) { StreamReader outputStream = StreamReader.Null; string output = ""; bool success = false; try { Process newProcess = new Process(); newProcess.StartInfo.FileName = exeName; newProcess.StartInfo.Arguments = argsLine; newProcess.StartInfo.UseShellExecute = false; newProcess.StartInfo.CreateNoWindow = true; //The command line is supressed to keep the process in the background newProcess.StartInfo.RedirectStandardOutput = true; newProcess.Start(); if (0 == timeoutSeconds) { outputStream = newProcess.StandardOutput; output = outputStream.ReadToEnd(); newProcess.WaitForExit(); } else { success = newProcess.WaitForExit(timeoutSeconds * 1000); if (success) { outputStream = newProcess.StandardOutput; output = outputStream.ReadToEnd(); } else { output = "Timed out at " + timeoutSeconds + " seconds waiting for " + exeName + " to exit."; } } } catch (Exception e) { throw (new Exception("An error occurred running " + exeName + ".", e)); } finally { outputStream.Close(); } return "\t" + output; } } } </code></pre> <p>This is the way I am passing arguments from my main program (Form1.cs)</p> <pre><code>private void button1_Click(object sender, EventArgs e) { string output; output = LaunchEXE.Run(@"C:\Program Files (x86)\MyFolder\MyConsole.exe", "/BACKUP C:\\MyBackupProfile.txt", 100); System.Windows.Forms.MessageBox.Show(output); } </code></pre> <p>The command line tool accepts the following command and works perfectly:</p> <p>C:\Program Files (x86)\MyFolder><strong>MyConsole.exe /BACKUP C:\MyBackupProfile.txt</strong></p>
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    1. COWhen you say "crashes the program", do you get an exception, error message, something else?
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    2. COJust the program crashes, I have log files for that command line tool, but it is not built by me... I got a reply from the developer of that tool that it is my fault and his tool is working well. But this is what I got out of the the tool's log file..."System.NullReferenceException: Object reference not set to an instance of an object." however I do not get any exception error in my program...
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    3. COA breakpoint at newProcess.Start(); itself crashes the program..
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