C # Run Program Echo

Description: Often have friends ask how to run a DOS command in C #, and intercepts the output, the output flow question, this question I previously implemented in the Java, because in C # has not encountered similar situation, in order to avoid each other people to ask each time again to demonstrate the situation, specially has made a simple example, Implement ping a Web site in WinForm and display the results of the ping in a text box.

Run the result diagram

Code generated by the form designer:
Namespace Runcmd
{
Partial class Cmdform
{
<summary>
The required designer variable.
</summary>
Private System.ComponentModel.IContainer components = null;

<summary>
Clean up all resources that are in use.
</summary>
<param name= "disposing" > if the managed resource should be freed, true; otherwise, false. </param>
protected override void Dispose (bool disposing)
{
if (disposing && (components!= null))
{
Components. Dispose ();
}
Base. Dispose (disposing);
}

Code generated #region the Windows forms Designer

<summary>
Designer supports the required methods-No
Use the Code Editor to modify the contents of this method.
</summary>
private void InitializeComponent ()
{
this. Label1 = new System.Windows.Forms.Label ();
this. Txtcommand = new System.Windows.Forms.TextBox ();
this. Btnexecute = new System.Windows.Forms.Button ();
this. Tbresult = new System.Windows.Forms.TextBox ();
this. SuspendLayout ();
//
Label1
//
this. Label1. AutoSize = true;
this. Label1. Location = new System.Drawing.Point (6, 11);
this. Label1. Name = "Label1";
this. Label1. Size = new System.Drawing.Size (29, 12);
this. Label1. TabIndex = 0;
this. Label1. Text = "ping";
//
Txtcommand
//
this. txtcommand.location = new System.Drawing.Point (41, 8);
this. Txtcommand.name = "Txtcommand";
this. txtcommand.size = new System.Drawing.Size (269, 21);
this. Txtcommand.tabindex = 1;
//
Btnexecute
//
this. btnexecute.location = new System.Drawing.Point (316, 6);
this. Btnexecute.name = "Btnexecute";
this. btnexecute.size = new System.Drawing.Size (75, 23);
this. Btnexecute.tabindex = 2;
this. Btnexecute.text = "Execution";
this. Btnexecute.usevisualstylebackcolor = true;
this. Btnexecute.click + + = new System.EventHandler (this. btnexecute_click);
//
Tbresult
//
this. tbresult.location = new System.Drawing.Point (8, 47);
this. Tbresult.multiline = true;
this. Tbresult.name = "Tbresult";
this. Tbresult.scrollbars = System.Windows.Forms.ScrollBars.Both;
this. tbresult.size = new System.Drawing.Size (383, 292);
this. Tbresult.tabindex = 3;
//
Cmdform
//
this. Autoscaledimensions = new System.Drawing.SizeF (6F, 12F);
this. AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this. ClientSize = new System.Drawing.Size (403, 364);
this. Controls.Add (this. tbresult);
this. Controls.Add (this. btnexecute);
this. Controls.Add (this. txtcommand);
this. Controls.Add (this. label1);
this. Name = "Cmdform";
this. Text = "Example of running command";
this. ResumeLayout (FALSE);
this. PerformLayout ();

}

#endregion

Private System.Windows.Forms.Label Label1;
Private System.Windows.Forms.TextBox Txtcommand;
Private System.Windows.Forms.Button Btnexecute;
Private System.Windows.Forms.TextBox Tbresult;
}
}

Key parts of the code:
Using System;
Using System.Collections.Generic;
Using System.ComponentModel;
Using System.Data;
Using System.Drawing;
Using System.Text;
Using System.Windows.Forms;
Using System.Diagnostics;
Using System.IO;

Namespace Runcmd
{
/* *
* Author: Zhou Gong
* BLOG:HTTP://BLOG.CSDN.NET/ZHOUFOXCN
* Date: 2007-07-07
*
* */
public partial class Cmdform:form
{
Public Cmdform ()
{
InitializeComponent ();
}

private void Btnexecute_click (object sender, EventArgs e)
{
Tbresult.text = "";
ProcessStartInfo start = new ProcessStartInfo ("Ping.exe"); Set Run command line file ask Ping.exe file, this file system will find itself
If it is a different EXE file, you may need to specify a detailed path, such as running WinRar.exe
Start. Arguments = Txtcommand.text; Set command parameters
Start. CreateNoWindow = true; Do not display DOS command line windows
Start. Redirectstandardoutput = true; //
Start. Redirectstandardinput = true; //
Start. UseShellExecute = false; Whether to specify the operating system shell process startup program
Process p = process.start (Start);
StreamReader reader = p.standardoutput; Intercept output stream
String line = reader. ReadLine (); Read one row at a time
while (! Reader. Endofstream)
{
Tbresult.appendtext (line + "");
line = reader. ReadLine ();
}
p.WaitForExit (); Wait for the program to finish executing the exit process
P.close (); Shutdown process
Reader. Close (); Close the stream
}
}
}