How to retrieve output from an external runed command?

Question

Hi, I have the following code to run a dos command e.g dir: strCmdLine = ' /p' ; System.Diagnostics. Process .Start( 'dir' , strCmdLine); How du i recieve the putput from the dir command?

MOrten Kruse · Answer

Hi, This worked very fine for me. It was not the dir command that i wsa using but I did provide that just for the meaning of the example. Best regards, Morten

Alan · Answer

Well, firstly, I don't think that code will work because 'dir' is a command within the command processor, cmd.exe, rather than an executable program in its own right. Secondly, I wouldn't use the /p option as that will cause your program to hang waiting for a key press to display the next page of files. Subject to that, this code should capture the whole output from the dir command and will also suppress the appearance of the command window in which it runs: using System; using System.IO; using System.Diagnostics; class Program { static void Main() { Process proc = new Process(); proc.StartInfo.FileName = "cmd.exe"; proc.StartInfo.CreateNoWindow = true; proc.StartInfo.Arguments = @"/C dir"; proc.StartInfo.RedirectStandardOutput = true; proc.StartInfo.UseShellExecute = false; proc.Start(); StreamReader sr = new StreamReader(proc.StandardOutput.BaseStream); string output = sr.ReadToEnd(); sr.Close(); proc.WaitForExit(); //if want to write output to file string fileName = @"someFile.txt"; StreamWriter sw = new StreamWriter(fileName); // overwrites any existing file sw.Write(output); sw.Close(); } }

How to retrieve output from an external runed command?

Insert Link

Embed YouTube Video

Table Options

Insert Image

Answers (2)