.NET 1.1 Bug? If Boolean Then DoThis()
I had a problem with some code tonight that drove me crazy!
It used to work, but now it doesn't!
I have a Method (Function) called IsValid, for example, that returns Boolean.
Public Function IsValid(TestText As String) As Boolean
If TestText = "Test" Then
Return True
Else
Return False
End If
End Function
I then had some code that said:
If Not IsValid(TestText.Text) Then lblResults.Text = "Wrong"
All of the sudden it just quit working, so I stepped through it and it looked correct, but BOOM, it kept going saying "Wrong, even if it was right!
So, I tried adding this line:
Dim CheckValid As Boolean = IsValid(TestText.Text)
CheckValid was returning correctly!
So, I finally tried this:
If Not IsValid(TestText.Text) Then
lblResults.Text = "Wrong"
End If
For some reason, it required the If -- Then to be on separate lines and that of course required the End If. Oh, well, it's a little more readable that way anyway, but still, it's just the point!
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About dwalker
David Walker has over 15 years experience in application development with over 50% of that employed as a consultant with companies such as: Texaco, Bank of Oklahoma, Winner Communications (ESPN.com) and IBM Global Services. At the age of 14, he began his application development ambitions with a Commodore 64, BASIC, and a 300 baud modem. Even at that early age, he primarily focused on two specific application types: multi-user communities and database applications.
His hunger to learn as much as possible about development lead him through courses such as DBase III, DBase IV, Pascal, C, C++, Java, and several in UNIX. He started his development career first doing heavy processing with Access and VBA, then moved on to VB 3, Oracle, and Delphi. Visual Basic was one environment that remained constant for many years, including his very first .NET projects performed in Visual Basic.NET.
After working several years on very high end internal Corporate applications, the consultant company he was working for, sought out his ideas for actual software products that could be packaged and sold. He had already developed several prototypes of a dynamic portal application, before portals even became popular, so this became the logic decision and he became the Director of Product Development. Under his direction, a team of developers and graphic artists, took a skinning approach before that become popular, and completed the core portal application, and continued on to developer 15+ add-on modules, including things such as: Help Desk Ticket Systems, Change Control, Records Management, Human Resources, and many more applications. Eventually, it spun off into it's own separate company as KnowledgeGEAR, a complete intranet in the box solution.
Having worked as a consultant, he has had a experience with a very wide range of applications and architectures, at one time, even converting several Fox Pro and GW-Basic applications to VB 6 and ASP. His early training of Unix and the C language and years of experience with JavaScript, lead him very quickly to C#, where he has remained focused ever since.
He is the current President of the
Tulsa Developers .NET user group.. He has been an MCP since 2003 and MCAD and MCSD since 2005. He is currently pursuing his MCDBA and then on to MCSE.