Lightbulb: How to add a Custom Class to ViewState

I was building a page today that allows an admin to do some configuration and doesn’t save anything back to the server until the admin chooses. I could have used XML or a temporary SQL table, but I choose ViewState for now. I continually received the error: Type ‘MyNamespace.MyClass’ in Assembly ‘App_Code.gvg30s8w, Version=, Culture=neutral, PublicKeyToken=null’ is not marked as serializable. Of course the error spells out what’s wrong. But, because I was still flustered with my earlier issue, I didn’t read into it far enough. Again, a search online turns up almost nothing. Finally, the light came on. To get it to work you will need to add the <Serializable> (in VB) or [serializable] (in C# to the beginning of your class. Well, back to the grind.

Lightbulb: How To Access the Item’s Index in a DataList or Repeater

Like every other day, I’m blowing through some really complex code trying to create hacks to get around difficult issues. Then, a road block. I have a mind freeze and oops, I forgot what the issue is. I had that earlier today when I forgot how to access the item index number in an ItemTemplate of a DataList or Repeater. I pinged the lists and Ryan Trudelle-Schwarz responded (although he forgot the big Duh! on the top) to use the Container.ItemIndex. Low and behold, adding this: <%# Container.ItemIndex %> to your code does spit out the Item Index number. After a good hour or so of searching MSDN trying to find it, Ryan came to the rescue. Thanks again Ryan for kick starting my brain.