test for input in ASP page

[Stephen Russell]

I have some simple code:
sub tbMessage_Change (sender as Object, E as EventArgs)
lblMessage.Text = "Hello " + tbMessage.Text
end sub

I want to evaluate the tbMessage.Text to see if there is any content or
empty in the submit. How do I do that. In VFP

iif(empty(tbMessage.Text),"","Hello ") would be the code. What is the VB
equiilvant?

TIA

__Stephen

[Phil Weber]

> I want to evaluate the tbMessage.Text to see if there
> is any content or empty in the submit. How do I do that?

Stephen:

Sub tbMessage_Change (sender as Object, E as EventArgs)
Dim sText As String = tbMessage.Text
If Len(sText) Then
sText = "Hello " & sText
End If
lblMessage.Text = sText
End Sub

---
Phil Weber

[Stephen Russell]

Thanks.
__Stephen

"Phil Weber" <pweber@nospam.fawcette.com> wrote in message
news:3c65a336@10.1.10.29...
> > I want to evaluate the tbMessage.Text to see if there
> > is any content or empty in the submit. How do I do that?
>
> Stephen:
>
> Sub tbMessage_Change (sender as Object, E as EventArgs)
> Dim sText As String = tbMessage.Text
> If Len(sText) Then
> sText = "Hello " & sText
> End If
> lblMessage.Text = sText
> End Sub
>
> ---
> Phil Weber
>
>

[Garry Mc]

There is an alternative syntax in VB.NET too,

VB6: len(sText)
VB.NET: sText.length = 0

Personally I prefer to be more explicit and would rather see either
if len(sText)= 0 then or
if sText.length = 0 then

I'm not sure which of the two is faster, but the VB.NET syntax will be the
same in C# too (well the sText.length bit anyway).

Garry Mc

"Phil Weber" <pweber@nospam.fawcette.com> wrote:
> > I want to evaluate the tbMessage.Text to see if there
> > is any content or empty in the submit. How do I do that?
>
>Stephen:
>
> Sub tbMessage_Change (sender as Object, E as EventArgs)
> Dim sText As String = tbMessage.Text
> If Len(sText) Then
> sText = "Hello " & sText
> End If
> lblMessage.Text = sText
> End Sub
>
>---
>Phil Weber
>
>

[Stephen Russell]

I'd rather be current in my code. Is there a way to see if blanks are all
that are in the string? Or do I have to create my own class for an empty()
function that parses through the string?

Thanks for the object reference.

__Stephen

"Garry Mc" <garrymc@spam.itswebservices.com> wrote in message
news:3c669ec1$1@10.1.10.29...
>
> There is an alternative syntax in VB.NET too,
>
> VB6: len(sText)
> VB.NET: sText.length = 0
>
> Personally I prefer to be more explicit and would rather see either
> if len(sText)= 0 then or
> if sText.length = 0 then
>
> I'm not sure which of the two is faster, but the VB.NET syntax will be the
> same in C# too (well the sText.length bit anyway).
>
> Garry Mc
>
> "Phil Weber" <pweber@nospam.fawcette.com> wrote:
> > > I want to evaluate the tbMessage.Text to see if there
> > > is any content or empty in the submit. How do I do that?
> >
> >Stephen:
> >
> > Sub tbMessage_Change (sender as Object, E as EventArgs)
> > Dim sText As String = tbMessage.Text
> > If Len(sText) Then
> > sText = "Hello " & sText
> > End If
> > lblMessage.Text = sText
> > End Sub
> >
> >---
> >Phil Weber
> >
> >
>

[Phil Weber]

> Is there a way to see if blanks are all that are
> in the string?

Stephen:

Sub tbMessage_Change (sender as Object, E as EventArgs)
Dim sText As String = Trim(tbMessage.Text)
If Len(sText) Then
sText = "Hello " & sText
End If
lblMessage.Text = sText
End Sub

---
Phil Weber