Why does this code not WORK?

[Christopher Stratmann]

using System;
using System.Drawing;
using System.Windows.Forms;

namespace WindowsApplication11 {
public class FormA : Form {
public virtual new Size PreferredSize {
get {
return new Size(300, 300);
}
}
}

static class Program {
	\[STAThread\]
	static void Main() {
		Application.EnableVisualStyles();
		Application.SetCompatibleTextRenderingDefault(false);
		Form form = new FormA();
		form.Size = form.PreferredSize;  // 300, 300 should be returned but instead 123,34 is returned.
		Application.Run(form);
	}
}

}

Chris

[Abhijit Jana]

chris175 wrote:

public virtual new Size PreferredSize { get { return new Size(300, 300); } }

What is "Size" ?

Best Regards ----------------- Abhijit Jana Check Out My Latest Article Java.NET : Integration of Java and .NET[^] "Success is Journey it's not a destination"

[Christopher Stratmann]

System.Drawing.Size

[Alan Balkany]

I encountered something similar, and got the right size AFTER the call to Application.Run (). If you get the size in FormA's Load method, it might be right at that point.

[carbon_golem]

Because when you Application.Run(form), InitializeComponent() gets called which probably resets the size of the form. Scott P

“It is practically impossible to teach good programming to students that have had a prior exposure to BASIC: as potential programmers they are mentally mutilated beyond hope of regeneration.” -Edsger Dijkstra

[Christopher Stratmann]

The wrong size is placed on the form BEFORE Application.Run(form) is called. I dont think it has anything to do with InitializeComponent() function since there isn't one within the class FormA. Chris

[Lost User]

If you do FormA form = new FormA() then your method will be called, otherwise the System.Windows.Forms.Control.PreferredSize property will be called (can be seen in .NET reflector). I guess this has to do with the fact that PrefferedSize in Control is not marked virtual or abstract. regards

[Abhijit Jana]

Its Working Fine

using System;
using System.Drawing;
using System.Windows.Forms;
namespace WindowsApplication11
{
public class FormA : Form
{
public virtual new Size PreferredSize
{
get
{
return new Size(300, 300);
}
}
}
static class Program
{
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Form form = new FormA();
Application.Run(form);
form.Size = form.PreferredSize; // 300, 300 should be returned but instead 123,34 is returned.

    }
}

}

Best Regards ----------------- Abhijit Jana Check Out My Latest Article Java.NET : Integration of Java and .NET[^] "Success is Journey it's not a destination"

[leppie]

carbon_golem wrote:

Because when you Application.Run(form), InitializeComponent()

No, you have it all wrong, there is no magic involved. InitializeComponent() is usually called from the Form's constructor.

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[Daniel Grunwald]

PreferredSize isn't virtual; you cannot override it. Instead your code created a new virtual property with the same name - but your Main method refers to the original PreferredSize property. You should override the virtual GetPreferredSize method instead.

[Christopher Stratmann]

That is what I was looking for... Thanks