Do I need to Convert with Convert.ToInt32 (session("myNum ber")) ?

[Andreas Klemt]

Hello,
I have this

session("myNumb er") = 888
Dim intNumber As Integer

a) intNumber = session("myNumb er")
b) intNumber = Convert.ToInt32 (session("myNum ber"))
What has better performance and what should I do?

Thanks,
Andreas

[Karl Seguin]

You are clearly not programming with Option Strict on. You should turn it
on and then you wouldn't have a choice but to select the most performant and
safest method.

b) Explicietly converting is the best way to do it, spefically from a
perfromance point of view...otherwis e you are late-binding...which is bad.

Alternative (and better) ways to write b) would be using cint() or
DirectCast...bo th of which should be faster than Convert.ToInt32 and are
recommeded by Microsoft. You should always explicetly convert. Session,
Application, Context, DataReader and DataRow objects are all great examples
of places that return object, but you are likely implicetly assigning to
ints or strings.

Also, some error handling would be nice ,no?

dim intNumber as integer
try
intNumber = cint(session("m yNumber"))
catch ex as FormatException
'maybe you wanna redirect? Maybe you wanna set a default value
catch ex as OverflowExcepti on
'maybe you wanna redirect? Maybe you wanna set a default value
end try

Karl
"Andreas Klemt" <ak******@hotma il.com> wrote in message
news:uj******** ******@TK2MSFTN GP11.phx.gbl...

Hello,
I have this

session("myNumb er") = 888
Dim intNumber As Integer

a) intNumber = session("myNumb er")
b) intNumber = Convert.ToInt32 (session("myNum ber"))
What has better performance and what should I do?

Thanks,
Andreas