Question

I have an entity with a NrPeso decimal property that can be saved in the database as 0 or null.
Here is what I’m doing to assign the value to the property:

entity.NrPeso = Convert.ToDecimal(object.value("value"))

The problem is: if I don’t fill the object value, it’s set to Nothing. When I do the cast it turns into 0. But I don’t want 0, I want Nothing. If I compare the object value with Nothing it will return me Nothing if it is Nothing or 0.

I tought in a few alternatives but they don’t seem good.

So, what is the right way to do this?

Answer 1

Decimal is a structure – is cannot be Nothing by definition.

You need a nullable Decimal.

If NrPeso is defined as Nullable(Of Decimal) (aka Decimal?), things should work as you expect.