Why Does Console.WriteLine() Not Write to Command Window?

  • Thread starter Thread starter joey.powell
  • Start date Start date
J

joey.powell

I have a windows form app in C# in VS2005. In the "program.cs" file, I
take some command line arguments and use "Console.WriteLine("fsdfsd")
to give feedback to users. When I step through the program, the code
block is executing, but no text is written to the command line.

What might be causing this?
 
Quite simply, windows apps don't connect to a console.

It can either be console or winform; Not both. This is part of the PE
header so is more Windows than .Net.

You could perhaps have 2 exes (one winform, one console).
Trace.WriteLine can be useful, as this will appear in the debugger by
default, or can be redirected.

Marc
 
Is just a thought but. why you dont try:

console.WriteLine("...");
Application.Run(new Form1);
 
put a breakpoint on the first line of your app and inspect
System.Console.Out. You'll see that it's ultimately a wrapper around
System.IO.Stream.NullStream.

((System.IO.StreamWriter)(((System.IO.TextWriter.SyncTextWriter)(System.Console.Out))._out)).BaseStream

Use a logging framework instead of console.writeline (I'd suggest
log4net).

HTH,

Sam
 
I have a windows form app in C# in VS2005. In the "program.cs" file, I
take some command line arguments and use "Console.WriteLine("fsdfsd")
to give feedback to users. When I step through the program, the code
block is executing, but no text is written to the command line.

What might be causing this?
Click to expand...

You've told the compiler that you have a windowed application. If you will
tell the compiler to compile it as a console app (which is somewhere in
Project Properties), you'll get a console window, and the forms will all
still work. This is a handy secret.

Or use System.Diagnostics.Debug.WriteLine(...) to write in the debug window
in VS2005 while the program runs.
 
Marc Gravell said:
Quite simply, windows apps don't connect to a console.

It can either be console or winform; Not both. This is part of the PE
header so is more Windows than .Net.
Click to expand...

Little-known fact: Actually it *can* be both. Take a Windows Forms app and
compile it as a console app, and you'll have a console window.

You can also use Win32 calls to create a console and attach a stream to it.
 
Little-known fact: Actually it *can* be both. Take a Windows Forms app and
compile it as a console app, and you'll have a console window.
Click to expand...

Not really, it's actually a console application that pops up a window.
The original console window stays visible all the time.
 
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