Catching a error in a custom property.

[vis781]

Hi there, i'll try to explain this as simply as possible.

I have a public property in my user control tha allows the user to adjust the opacity of a color. It is adjusted by altering the alpha channel. However if i get a daft user and he/she tries to set it at less that one or more than 255 the application throws a wobbly despite any error handling that i place in there. Can any one help as to where i should place my error handling so the error is delt with by my code. My code it as follows:

[Public property GradientOpacity as Integer

Get
Return some variable
End Get

Try
Set (ByVal value as Integer)
some variable = value

Catch ex as exception

Throw new ArgumentOutOfRangeException

End Set
End Try

If you can help i would appreciate it. Thanks

 

[sevenhalo]

If you're trying to let the referencing component know about the exception, I've been using delegates. They're alot like pointers in C. I'm by no means an expert on them (I only started using them less than a month ago), but they work really well.

http://abstractvb.com/code.asp?A=1084

 

[vis781]

Thanks for the tip. I must admit i've never used delegates before, atleast not knowingly. And after i read the info on the link you gave me i'm still none the wiser. Looks like it'll be a while till i get my head round this one. But thanks again.