On 12/22/2011 1:08 AM, Hiren Visavadiya wrote:
> Hi friends.
>
> let me tell you first that i m very new at Entity framwork. Today, i am
> playing with .edmx and repository pattern. I have created and
> ProfileModel.edmx which contains only one profile table or entity. and
> it contains 23 fields and one name field is not null out of all 23 fields.
>
> When I see in designer.cs fille, It has createProfile method with only
> two parameters, one is id and second is name. so what about all other
> fields which I need to set in create method. and I got compilation error.
>
It's looking at the entity as a whole as a public partial class, and
within class the createmethod() for the entity it's creating the entity,
settings the entity key and returning a new entity.
And then after that, you see all the public properties that can be
set/get within the entity.
The public properties are there if you look at an entity in the designer
those same properties you are seeing in the pane of the graphical
display of the entity.
You create the entity object new in your code that is not part of the
designer.
var obj = new someentity();
You address the public properties of the entity from that point of
either you set the property with data or you get data from the property
of the object,
obj.Name = "Mike"; // set
string name = obj.Name; // get
All the code in addressing the entity is in that designer.cs including
the methods/behavior of the entity/object.
You don't address the entity's key property when doing a create as EF
will populate the entity/object itself with the returned key if it's
successfully saved.
You set the entity's key property when you want to get, update or
delete an existing entity.
It's upto you in code to deal with the entity/object properties of
getting data in the object or setting data in the object based on the
object's public property doing it in code outside of the designer.cs,
like dealing with the entities in a (DAL) Data Access Layer classlib
project that has reference to the EF Model.
Just follow the project in the link, and there is one for VB too.
