How to display output of iperf cmd prompt in textbox

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I am using iperf-2.0.5-2-win32 tool to find network bandwidth. I have written codes in c# which opens the cmd prompt, pass iperf parameters to start server side & client side. iperf-2.0.5-2-win32 exe will not open directly, need to open through cmd prompt only. At present the output(Transfer rate & Bandwidth) is displaying on cmd prompt itself. I want these output to be displayed in textbox I have tried StreamReader also. But it takes null, I have also tried OutputDataReceived Event, its also taking null. Found few codes for ipconfig & ping.but those were not working with iperf codes.

C#

button_click event(),
{
    Process Client_proc = new Process();
    ProcessStartInfo Client_command = new ProcessStartInfo("cmd.exe"); 
    string ip = txtIP.Text;
    Client_command.CreateNoWindow = true;
    Client_command.WindowStyle = ProcessWindowStyle.Hidden;
    Client_command.WorkingDirectory = @"E:\Iperf\RunEXE_Through_Application\iperf-2.0.5-2-win32";
    Client_command.Arguments = "/c START iperf -c " + ip;
    Client_proc.StartInfo = Client_command;
    Client_command.RedirectStandardOutput = true;
    Client_command.UseShellExecute = false;
    Client_proc.OutputDataReceived += new DataReceivedEventHandler(Client_proc_OutputDataReceived);
    Client_proc.Start(); 
    Client_proc.BeginOutputReadLine(); 
    Client_proc.WaitForExit();
}

void Client_proc_OutputDataReceived(object sender, DataReceivedEventArgs e)
{
    if (e.Data != null)
    {
        string newLine = e.Data.Trim() + Environment.NewLine;
        MethodInvoker append = () => txtOutput.Text += newLine;
        txtOutput.BeginInvoke(append);
    }
}

Plz help me.Earlier responses are appreciated Thanks

Posted 21-May-14 2:14am

Member 10590933

Updated 21-May-14 2:31am

Prasad Khandekar

v2

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Prasad Khandekar · Accepted Answer · 2014-05-21T03:20:00

Hello,

I tried with following code and was able to read the output of the iperf program.

C#

Process p = new Process();
p.StartInfo.UseShellExecute = false;
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.WindowStyle = ProcessWindowStyle.Minimized;
p.StartInfo.FileName = "F:\\SCRAP\\IPREF\\iperf.exe";
p.StartInfo.Arguments = "-c 10.91.10.217 -p 8080";
p.Start();
p.WaitForExit();
string output = p.StandardOutput.ReadToEnd();
Console.WriteLine(output);

Here is the output I received

------------------------------------------------------------
Client connecting to 10.91.10.217, TCP port 8080
TCP window size: 64.0 KByte (default)
------------------------------------------------------------
[  3] local 10.91.105.145 port 55538 connected with 10.91.10.217 port 8080
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  1897666874917397 bits  1920124492449476278251040091125s/sec

Regards,