Question

Can anyone help?

I have some code that is shared between 2 projects. The code points to a model which basically is a collection of properties that comes from a db.

Problem being is that some properties use nullable types in 1 model and the other it doesn’t

Really the dbs should use the same but they don’t ..

so for example there is a property called IsAvailble which uses “bool” in one model and the other it uses bool? (nullable type)

so in my code i do the following

 objContract.IsAvailble.Value ? "Yes" : "No"   //notice the property .VALUE as its a bool? (nullable type)

but this line will fail on model that uses a standard “bool” (not nullable) as there is no property .VALUE on types that are NOT nullable

Is there some kind of helper class that i check if the property is a nullable type and i can return .Value .. otherwise i just return the property.

Anybody have a solution for this?

EDIT

This is what i have now….. i am checking HasValue in the nullable type version

public static class NullableExtensions
{
public static T GetValue(this T obj) where T : struct
{
return obj;
}
public static T GetValue(this Nullable obj) where T : struct
{
return obj.Value;
}

    public static T GetValue<T>(this T obj, T defaultValue) where T : struct
    {
        return obj;
    }

    public static T GetValue<T>(this Nullable<T> obj, T defaultValue) where T : struct
    {
        if (obj.HasValue)
            return obj.Value;
        else
            return defaultValue;
    }
}

Answer 1

This is a little weird, but maybe you can use an extension method here:

static class NullableExtensions
{
    public static T GetValue<T>(this T obj) where T : struct
    {
        return obj;
    }
    public static T GetValue<T>(this Nullable<T> obj) where T : struct
    {
        return obj.Value;
    }
}

They will work with nullable or regular types:

int? i = 4;
int j = 5;

int a = i.GetValue();
int b = j.GetValue();