Compiling Java code within a C#Builder...

[genc ymeri]

Hi overthere,
I'm trying to compile some Java code within a C# application form. So the
end user will write his/her code in a textbox and a button compile will
compiles it.

I tried to use System.Diagnost ics.Process.Sta rt() but the console
application was launched too.
I want to compile and retrieve the errors/messages without lauching another
app and showing the errors/messages in within my winform.

Any tip will be very much appreciated.

Thank You in advance.

[genc ymeri]

Ali,
It seems that it is working in the background but I'm not able to read out
the messages. Am I doing something wrong ????

ProcessStartInf o p = new ProcessStartInf o("C:\\javac.ex e",
"C:\\Hello.java ");
p.RedirectStand ardOutput=true;
p.RedirectStand ardError=true;
p.UseShellExecu te=false;
p.CreateNoWindo w=true;
Process ps = Process.Start(p );
this.label1.Tex t=ps.StandardOu tput.ReadLine() ; //reads nothing...??
When I run it from the console I get these error messages:

C:\javac.exe Hello.java

Hello.java:3: invalid method declaration;
return type required
public sayHello()
^
Hello.java:5: write(java.lang .String) has
private access in java.io.PrintSt ream
System.out.writ e("hello");
^
2 errors


Thanks a lot !!!!

"Ali" <aa*******@gmai l.com> wrote in message
news:86******** *************** ***********@mic rosoft.com...

When calling the System.Diagnost ics.Process.Sta rt() method, pass it an object of type ProcessStartInf o with the following properties set:

ProcessStartInf o p=new ProcessStartInf o("ConsoleAppli cation1.exe");
p.RedirectStand ardOutput=true;
p.RedirectStand ardError=true;
p.UseShellExecu te=false;
p.CreateNoWindo w=true;
Process ps = Process.Start(p );
this.label1.Tex t=ps.StandardOu tput.ReadLine() ;

now when the procss starts, it doesnot have a window (so no console window) and all the output to the standard output and standard error stream are
redirected to the ps.StandardOutp ut stream and can be read using any of the stream access mechenisms (such as ReadLine being used in the above sample).
Hope this helps

Ali Gardezi

[Jon Skeet [C# MVP]]

genc ymeri <ge********@hot mail.com> wrote:

It seems that it is working in the background but I'm not able to read out
the messages. Am I doing something wrong ????

ProcessStartInf o p = new ProcessStartInf o("C:\\javac.ex e",
"C:\\Hello.java ");
p.RedirectStand ardOutput=true;
p.RedirectStand ardError=true;
p.UseShellExecu te=false;
p.CreateNoWindo w=true;
Process ps = Process.Start(p );
this.label1.Tex t=ps.StandardOu tput.ReadLine() ; //reads nothing...??

Have you tried reading from StandardError instead of StandardOutput?
After all, those are error messages.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[genc ymeri]

Yeap, it works reading standart errors.

Thanks a lot Ali & Jon :) :)

"Jon Skeet [C# MVP]" <sk***@pobox.co m> wrote in message
news:MP******** *************** *@msnews.micros oft.com...

genc ymeri <ge********@hot mail.com> wrote:

It seems that it is working in the background but I'm not able to read out the messages. Am I doing something wrong ????

ProcessStartInf o p = new ProcessStartInf o("C:\\javac.ex e",
"C:\\Hello.java ");
p.RedirectStand ardOutput=true;
p.RedirectStand ardError=true;
p.UseShellExecu te=false;
p.CreateNoWindo w=true;
Process ps = Process.Start(p );
this.label1.Tex t=ps.StandardOu tput.ReadLine() ; //reads nothing...??

Have you tried reading from StandardError instead of StandardOutput?
After all, those are error messages.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Ali]

Error messages are sent to standard error, thats why i have also redirected
standard error in the given code. So instead of doing
ps.StandardOutp ut.ReadLine(); to read error messages, use
ps.StandardErro r.ReadLine(); to see if the compiler returned error messages.

Ali Gardezi

"genc ymeri" wrote:

Ali,
It seems that it is working in the background but I'm not able to read out
the messages. Am I doing something wrong ????

ProcessStartInf o p = new ProcessStartInf o("C:\\javac.ex e",
"C:\\Hello.java ");
p.RedirectStand ardOutput=true;
p.RedirectStand ardError=true;
p.UseShellExecu te=false;
p.CreateNoWindo w=true;
Process ps = Process.Start(p );
this.label1.Tex t=ps.StandardOu tput.ReadLine() ; //reads nothing...??
When I run it from the console I get these error messages:

C:\javac.exe Hello.java

Hello.java:3: invalid method declaration;
return type required
public sayHello()
^
Hello.java:5: write(java.lang .String) has
private access in java.io.PrintSt ream
System.out.writ e("hello");
^
2 errors


Thanks a lot !!!!

"Ali" <aa*******@gmai l.com> wrote in message
news:86******** *************** ***********@mic rosoft.com...

When calling the System.Diagnost ics.Process.Sta rt() method, pass it an

object

of type ProcessStartInf o with the following properties set:

ProcessStartInf o p=new ProcessStartInf o("ConsoleAppli cation1.exe");
p.RedirectStand ardOutput=true;
p.RedirectStand ardError=true;
p.UseShellExecu te=false;
p.CreateNoWindo w=true;
Process ps = Process.Start(p );
this.label1.Tex t=ps.StandardOu tput.ReadLine() ;

now when the procss starts, it doesnot have a window (so no console

window)

and all the output to the standard output and standard error stream are
redirected to the ps.StandardOutp ut stream and can be read using any of

the

stream access mechenisms (such as ReadLine being used in the above

sample).

Hope this helps

Ali Gardezi

[genc ymeri]

thanks a lot :) :)
"Ali" <aa*******@gmai l.com> wrote in message
news:E4******** *************** ***********@mic rosoft.com...

Error messages are sent to standard error, thats why i have also redirected standard error in the given code. So instead of doing
ps.StandardOutp ut.ReadLine(); to read error messages, use
ps.StandardErro r.ReadLine(); to see if the compiler returned error messages.
Ali Gardezi

"genc ymeri" wrote:

Ali,
It seems that it is working in the background but I'm not able to read out the messages. Am I doing something wrong ????

ProcessStartInf o p = new ProcessStartInf o("C:\\javac.ex e",
"C:\\Hello.java ");
p.RedirectStand ardOutput=true;
p.RedirectStand ardError=true;
p.UseShellExecu te=false;
p.CreateNoWindo w=true;
Process ps = Process.Start(p );
this.label1.Tex t=ps.StandardOu tput.ReadLine() ; //reads nothing...??
When I run it from the console I get these error messages:

C:\javac.exe Hello.java

Hello.java:3: invalid method declaration;
return type required
public sayHello()
^
Hello.java:5: write(java.lang .String) has
private access in java.io.PrintSt ream
System.out.writ e("hello");
^
2 errors


Thanks a lot !!!!

"Ali" <aa*******@gmai l.com> wrote in message
news:86******** *************** ***********@mic rosoft.com...

When calling the System.Diagnost ics.Process.Sta rt() method, pass it an

object

of type ProcessStartInf o with the following properties set:

ProcessStartInf o p=new ProcessStartInf o("ConsoleAppli cation1.exe");
p.RedirectStand ardOutput=true;
p.RedirectStand ardError=true;
p.UseShellExecu te=false;
p.CreateNoWindo w=true;
Process ps = Process.Start(p );
this.label1.Tex t=ps.StandardOu tput.ReadLine() ;

now when the procss starts, it doesnot have a window (so no console

window)

and all the output to the standard output and standard error stream are redirected to the ps.StandardOutp ut stream and can be read using any

of the

stream access mechenisms (such as ReadLine being used in the above

sample).

Hope this helps

Ali Gardezi