In Report Builder 3.0 I have the following expression:
=IIf((Fields!my_guid_field.Value="XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX"), "SomeTrueText", "SomeFalseText")
When I view the Fields!my_guid_field.Value value on my report I can see that it outputs the string representation of the GUID.
But when the report runs the above expression fails with the error:
I have also tried converting the GUID using CStr() but that gives the same error above.
What is the solution?