LINQ to SQL auto-generated extensibility methods

Question

When I create entity classes using LINQ to SQL, I get what I want, but I also get many other extensibility method definitions.

For example for myField (TEXT) I get:

   partial void OnMyFieldChanging(string value);
   partial void OnMyFieldChanged();

What's the general use for the extensibility methods above?

0

JohnIdol Dec 14. 08:12 PM

1 answer

terjetyl · Accepted Answer · 2008-12-14T20:53:30+0000

Most of the examples I've seen for overriding these methods use validation.

partial void OnMyFieldChanging(string value)
{
  if(value == valid)
     continue;
  else
    throw new Exception();
}

You can override these methods directly for each property or also override OnValidate () for the whole object