Number only edit boxes ???

[Christian Graus]

I've been through the properties a bajillion times - could someone please tell me where Microsoft have hidden the option for an edit box to only accept numbers ? Thanks Christian The tragedy of cyberspace - that so much can travel so far, and yet mean so little. "But there isn't a whole lot out there that pisses me off more than someone leaving my code looking like they leaned on the keyboard and prayed that it would compile. - Jamie Hale, 17/4/2002

[James T Johnson]

Its not there :(( There is a masked edit box control here, you can borrow the simple code from that :) It might even be simpler than overrideing Key*, just override IsInputKey/Char and return false for anything but numbers, '.', and ',' then you only need to check for double decimal separators. James Simplicity Rules!

[Christian Graus]

Thanks. My first thought was to override OnChar and check for myself, but I thought that surely C# couldn't be so pathetic as to leave out edit boxes for numbers only ? I guess I was wrong. Christian The tragedy of cyberspace - that so much can travel so far, and yet mean so little. "But there isn't a whole lot out there that pisses me off more than someone leaving my code looking like they leaned on the keyboard and prayed that it would compile. - Jamie Hale, 17/4/2002

[James T Johnson]

Christian Graus wrote: I thought that surely C# couldn't be so pathetic Not C#, Windows Forms :-P James :) Simplicity Rules!

[David Wengier]

An Extender Provider is even more fun, since you can then attach it to any control that accepts key input. A ComboBox is the most obvious other control that this would be useful for. I just happen to have written one too, but of course, i'm too lazy to do anything about it. :-O -- David Wengier Sonork ID: 100.14177 - Ch00k

[Neil Van Note]

Another solution, if all you want is a basic TextBox with the ES_NUMBER style applied...

public class NumericTextBox : System.Windows.Forms.TextBox
{
private const int ES_NUMBER = 0x00002000;

public NumericTextBox()
{
}

protected override CreateParams CreateParams 
{
	get 
	{
		CreateParams createParams = base.CreateParams;
		createParams.Style |= ES\_NUMBER;
		return createParams;
	}
}

}

[Mazdak]

I do it in KeyPress. :) Mazy "The path you tread is narrow and the drop is shear and very high, The ravens all are watching from a vantage point near by, Apprehension creeping like a choo-train uo your spine, Will the tightrope reach the end;will the final cuplet rhyme?"Cymbaline-Pink Floyd