10 November 2009

ObjectDataSource TypeName and Nested Classes

When trying to use an ObjectDataSource with an method from my data access layer, I kept getting this error:

The type specified in the TypeName property of ObjectDataSource 'myODS' could not be found.

Long story short, the object I was using was actually a nested class. Even though you write you code like this:


The actual fully qualified type name for an ObjectDataSource TypeName will be "MyNamespace.MyClass+NestedClass" with a SelectMethod of "Action". If you visit this MSDN page and look down to where it talks about delimiters, you will see that nested classes use a plus as a delimiter for some reason instead of the usual dot.


Anonymous said...

Thank you. I wasted no time or effort determining the cause of the error, because you were the number one Google result.

Anonymous said...

Ditto. Thanks.