Re: chr() .Net equivalent

"David Griffiths" <dayvg69@yahoo.nospam.co.uk> schrieb
> Hi all
>
> I thought I would convert an old program to use just .net, removing
> the Microsoft.Visual Basic namespace.
>
> I seem to have succeeded except for just one are. What is the .net
> equivalent to chr(). I am capturing the keyboard input and if it's a
> carriage return I call the Caluculate Subroutine.
>
> Private Sub txtVat_KeyPress(ByVal sender As Object, ByVal e As
> System.Windows.Forms.KeyPressEventArgs) Handles txtVat.KeyPress If
> Not (Char.IsDigit(e.KeyChar) Or Char.IsControl(e.KeyChar) Or
> e.KeyChar = dp) Then
> e.Handled = True
> End If
>
> If e.KeyChar = Chr(13) Then
> Call Calculate()
> End If
> End Sub
>
> I have tried replacing the chr(13) with
>
> If e.KeyChar = Environment.NewLine Then
> Call Calculate()
> End If
>
> No joy. I'm sure there must be a way to do this in .net.

Microsoft.VisualBasic is part of .Net, so you can keep using Chr(). You
can also use vbCr constant. Or Controlchars.CR. Environment.NewLine is
CR+LF, therefore it does not work. You can also use
"Convert.ToChar(13)".

If you want to handle keys not chars, you should handle the KeyDown
event.


Armin

"Armin Zingler" <az.nospam@freenet.de> schrieb:
> Microsoft.VisualBasic is part of .Net, so you can keep using Chr(). You
> can also use vbCr constant. Or Controlchars.CR. Environment.NewLine is
> CR+LF, therefore it does not work. You can also use
> "Convert.ToChar(13)".

I agree, but note that 'Convert.ToChar' is not known by the compiler and
thus the conversion is performed at runtime. If you are using 'ChrW' or
'ControlChars.CR' a char literal is stored in the IL.

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M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
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