Variable mu is passed by reference error

darleneb · September 14th, 2015, 06:41 AM

I have a question on the ReadUserFile method and ValudateUser function

Page 576 VB code

Try
ReadUserFile()

Dim mu as MembershipUser

If (_MyUsers.TryGetValue(username.ToLower(), mu)) then

I get following warning:
Warning 1 Variable 'mu' is passed by reference before it has been assigned a value. A null reference exception could result at runtime.

Do I need to use framework 4.5. My app is in 4.0 ?
I put the code as listed and I get this??

darleneb · September 17th, 2015, 02:17 PM

Dim mu As MembershipUser = Nothing

Feel like a ditz.

KelvinSmith · September 25th, 2015, 03:31 AM

You need to assign a MembershipUser object to the references:

Code:

Dim mu As MembershipUser = New MembershipUser()

Or:

Code:

Dim mu As New MembershipUser()