I'm using adapter model, I want to set default value for some properties (such as created date) of the newly created entity. I implement this in InitClassEmpty(), it works fine for new entities, and default value assigned can be saved to database too.

However, those properties with default value assigned are flagged as changed, when I fetch existing entities from database, those properties is not set to the value read from database, but assigned default value. For example, created date is updated everytime I fetch the entities, I cannot get the correct value from database.

private void InitClassEmpty(ItemValidator validator, IEntityFields2 fields)
{
    InitClassMembers();

    base.Fields = fields;
    base.IsNew=true;
    base.Validator = validator;

    // __LLBLGENPRO_USER_CODE_REGION_START InitClassEmpty
    CreatedDate = DateTime.Now;
    // __LLBLGENPRO_USER_CODE_REGION_END

}

Am I coding in wrong ways to set default value? Thank you very much!

I would have set those default values directly in the database.

Additionally, if you want to do it in code instead of with default constraints as Walaa suggested, change:

    // __LLBLGENPRO_USER_CODE_REGION_START InitClassEmpty
    CreatedDate = DateTime.Now;
    // __LLBLGENPRO_USER_CODE_REGION_END

into:

    // __LLBLGENPRO_USER_CODE_REGION_START InitClassEmpty
if(fields.State==EntityState.New)
{
    CreatedDate = DateTime.Now;
}
    // __LLBLGENPRO_USER_CODE_REGION_END

Exactly,

You may also refer to the following threads:

http://www.llblgen.com/tinyforum/Messages.aspx?ThreadID=3544

http://www.llblgen.com/tinyforum/Messages.aspx?ThreadID=3194

It works great! Thanks all of you!!!

If you're still looking for some example code I did this same thing. My code fills the default values on the client-side when adding a new record through the GUI and also verifies that default values are filled on the server side before saving to enure that programmatic adds are handled. Both use the same default value definition.

If you're interested in the code email at simon-underscore-beets-at-adp-dot-com.