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Printing to a Form in C#.NET

Posted on 2007-04-03
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Last Modified: 2013-12-16
Hello,

Why doesn't Console.WriteLine("hello") write anything to the form from which I'm calling it (C#.NET)?  What's the best way to tell the program to print to the form?
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Question by:NigelRocks
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Mike Tomlinson earned 150 total points
ID: 18847522
To print on the form you need a Graphics context.

For temporary graphics writes use:

    Graphics g = this.CreateGraphics();
    g.DrawString(...stuff in here...);
    g.Dispose();

These will get erased when the form is refreshed such as if someone minimized it or if another form obscured it.

For persistent graphics use the graphics provided in the "e" parameter of the forms Paint() event...
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by:Fernando Soto
Fernando Soto earned 150 total points
ID: 18847528
Hi NigelRocks;

The reason is that Console.Writeline writes to a console window. When you are using a Windows Form application there is no Console. When executing the code in a Windows Form and from the development IDE Console messages go to the Output window.

To display messages you can place a textBox  on the form and set its MultiLine property to true and then expand the textBox so that multiple lines can be displayed in it and use code like this

            textBox1.AppendText("Hello World\n");
            textBox1.AppendText("Another Hello World Message\n");

to write to it.

Fernando
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by:mahanatti
mahanatti earned 75 total points
ID: 18862569
Console.WriteLine can be used to write to the console window in a Console Application but not to Windows Application since it uses GUI but not Console.

To print your form you could use the PrintDocument class in the System.Drawing.Printing namespace. Please refer http://www.codeproject.com/csharp/printform.asp that has a sample.
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Expert Comment

by:Fernando Soto
ID: 19252884
Hi Bob;

I believe this should be a point split. Everyone provided valid information about the question.

Thanks;

Fernando
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