Visual Studio help (1 Viewer)

[Gavvvvvin]

Can someone please tell me what is wrong with this line:

Console.WriteLine("Flow rate = (0)", flowequation(waterheight, maxflowrate, As double))

It has the As underlined and says an expression is expected. Yeah I have no idea what I'm talkin about

 

[ianc]

I'm not entirely sure either, but just looking at that the syntax looks a bit strange. The As double is not an argument that you're passing to the flowequation function, so shouldn't it be outside the brackets?

Perhaps your code should look like this:

Console.WriteLine("Flow rate = (0)", flowequation(waterheight, maxflowrate) As double)

Hope this helps!!

 

[Gavvvvvin]

thankd i'ved managed to solve that problem now

But I do have a new problem...how do I make the program check whether or not a number has been entered instead of say text?

 

[ianc]

Allows only numbers to be entered in a text box

'put this code in the keypress event of the textbox

If e.KeyChar.IsNumber(e.KeyChar) = False Then[INDENT]e.Handled = True
[/INDENT]End If

hope this is what you're after!

edit: actually, this isn't what you asked for but it may be useful.

Perhaps you could do an ASCII check on the string? I think ASCII codes for numbers are 48-57. I did this in a program recently, but I don't think I've still got the source code...