CODEWITHSUNDEEP
c#.netentity-frameworkdata-binding
Kumar
Kumar

Reputation: 11369

saving an EF Entity after edit

I have a EF entity retrieved and bound to some UI controls using Unit of Work

public RowItem MyItem { get; set; }
using ( var ctx = new MyContext() )
    MyItem = ctx.MyEntity.Single( x =>  /// parms };


at a later time, the updates are saved on some user action

Question - how can i use the existing entity MyItem and keep it simple along the lines of

using ( var ctx = new MyContext() )
       MyItem.UpdateUsingContext(ctx);

Upvotes: 0

Views: 104

Answers (2)

Maciej
Maciej

Reputation: 7961

Well, saving an object in EF is simple:

context.SaveChanges();

This saves all updated/new/deleted object in context.

If your objects were not created in this particular instance of context you should attach them before saving:

context.Attach(entity);
context.SaveChange();

Upvotes: 3

daryal
daryal

Reputation: 14929

If you need to create a new datacontext, you need to first attach your object, something like;

using ( var ctx = new MyContext() )
{
   ctx.Attach(entity);
   ctx.SaveChanges();
}

If you are resuing the same context, which were used to fetch the entity from database you may simply call savechanges.

Upvotes: 0

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