Can Nullable Types Be Used as Generic Parameters in .NET Functions?

Generic Function with Nullable Parameters

In .NET, generic functions provide a convenient way to define functions that can handle different types of input. However, the question arises whether null types can be used as generic parameters.

The initial attempt to define a function that retrieves a value from a DBDataRecord erred due to the nullable type int? being a struct rather than a reference type. Changing the constraint to a struct constraint allowed the function to compile.

However, the assignment raised a different error, indicating that the nullable type must be a non-nullable value type. So, is it possible to utilize a nullable type as a generic parameter?

The solution lies in modifying the return type of the function to Nullable, where T represents the desired non-nullable type. By calling the function with the non-nullable parameter, proper value retrieval is ensured.

The above is the detailed content of Can Nullable Types Be Used as Generic Parameters in .NET Functions?. For more information, please follow other related articles on the PHP Chinese website!