I wish to automagically discover some information on a provided class to do something akin to form entry. Specifically I am using reflection to return a PropertyInfo value for each property. I can read or write values to each property from my "form", but if the property is defined as "int", I would not be able to, and my program should not even try, to write a null value.
How can I use reflection to determine if a given property can be assigned a null value, without writing a switch statement to check for every possible type? In particular I want to detect the difference between boxed types like "int" vs. "int?", since in the second case I do want to be able to write a null value. The IsValueType and IsByRef don't seem to see a difference.
public class MyClass
{
// Should tell me I cannot assign a null
public int Age {get; set;}
public DateTime BirthDate {get; set;}
public MyStateEnum State {get; set;}
public MyCCStruct CreditCard {get; set;}
// Should tell me I can assign a null
public DateTime? DateOfDeath {get; set;}
public MyFamilyClass Famly {get; set;}
}
Note that I need to determine this information long before I actually attempt to write the value, so using exception handling wrapped around SetValue is not an option.
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