C # How To Get The output content of the command line

In many cases, we need to obtain the output content of the command line through programming. After studying it for a lot of time, we finally got it done.

There are two methods to obtain the output content of the command line: traditional and asynchronous.

Traditional methods:

 1   Using (Process = New System. Diagnostics. Process ())
 2 {
 3 Process. startinfo. filename = "  Ping  " ;
 4 Process. startinfo. Arguments = " Www.ymind.net  " ;
 5       //  OS shell must be disabledProgram  
  6 Process. startinfo. useshellexecute = False ;
 7 Process. startinfo. createnowindow = True ;
 8 Process. startinfo. redirectstandardoutput = True ;
 9   
 10 Process. Start ();
 11   
 12       String Output = process. standardoutput. readtoend ();
 13   
 14       If (String. isnullorempty (output) = False )
 15           This . Textbox1.appendtext (output +"  \ R \ n  " );
 16   
 17 Process. waitforexit ();
 18 Process. Close ();
 19 }

Asynchronous mode:

 1   Private   Void Button3_click ( Object Sender, eventargs E)
 2 {
3       Using (Process = New System. Diagnostics. Process ())
 4 {
 5 Process. startinfo. filename = "  Ping  " ;
 6 Process. startinfo. Arguments = "  Www.ymind.net-T  " ;
7           //  OS shell must be disabled  
  8 Process. startinfo. useshellexecute = False ;
 9 Process. startinfo. createnowindow = True ;
 10 Process. startinfo. redirectstandardoutput = True ;
 11   
 12 Process. Start ();
 13   
 14           //  Asynchronously obtain command line Content  
  15 Process. beginoutputreadline ();
 16   
 17           //  Obtain subscription events Asynchronously  
  18 Process. outputdatareceived + = New Datareceivedeventhandler (process_outputdatareceived );
 19 }
 20 }
 21   
 22   Private   Void Process_outputdatareceived ( Object Sender, datareceivedeventargs E)
 23 {
 24       //  Here is only an example of output. In fact, you can cancel obtaining the command line content as needed.
 25   //  Reference: process. canceloutputread ()  
  26   
 27       If (String. isnullorempty (E. Data) = False )
 28           This . Appendtext (E. Data + "  \ R \ n  " );
 29 }
30   
 31   # Region Solve the problem of control access under multiple threads
 32   
 33   Public   Delegate   Void Appendtextcallback ( String Text );
 34   
 35   Public   Void Appendtext ( String Text)
 36 {
 37       If ( This . Textbox1.invokerequired)
 38 {
 39 Appendtextcallback d = New Appendtextcallback (appendtext );
 40           This . Textbox1.invoke (D, text );
 41 }
42       Else  
 43 {
 44           This . Textbox1.appendtext (text );
 45 }
 46 }
 47   
 48   # Endregion