Generic-Linq Error in C#.net 2008

GenericParameterAttributes = '(dtResults).Category_CodeColumn.DataType.GenericParameterAttributes' threw an exception of type 'System.InvalidOperationException'
GenericParameterAttributes = '(dtResults).Category_CodeColumn.DataType.GenericParameterAttributes' threw an exception of type 'System.InvalidOperationException'
I am in the process of changing a C#.net web windows form application that connects all the databases to a project folder called 'dataadapters'. This application uses linq as part of the code and the generic classes. I basically need to change columns in the database since the production will be changing in a month or two. Right now i am getting the error
GenericParameterAttributes = '(dtResults).Category_CodeColumn.DataType.GenericParameterAttributes' threw an exception of type 'System.InvalidOperationException'.
I know the problem is related to the linq code,but iIdo not know how to get to the LINQ code. Part of the code might related to an embedded file.
How would you resolve this problem?

1 Reply

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Zoran Horvat15y ago
Accepted answer
This error is not related to Linq, but rather to the type you're accessing - DataType property does not return a generic parameter type and hence GenericParameterAttributes property cannot be read.

You can read GenericParameterAttributes property only on Type instances which have IsGenericType property returning true.

To correct the issue you might do this:
Type dataType = (dbResult).Category_CodeColumn.DataType;
GenericParameterAttributes = (dataType.IsGenericParameter ? dataType.GenericParameterAttributes : null);

Zoran