Partial Class question...for Exists

[sitefinitysteve]

I want to extend my partial class to have an extension or a static method for .Exists or something like that so I can know if it's already in the database before trying an insert

Do I have to make and dispose a new context in the partial or can it leverage anything?....does this functionality already exist somewhere?  I just want to check .Exists on the PK

[Alexander]

Hello Steve,

You can do something like this:

public partial class MyEntityDiagrams
{
    public bool Exists<T>(object id) where T: class
    {
        IObjectId objectId = Telerik.OpenAccess.Database.OID.ParseObjectId(typeof(T), id.ToString());
        try
        {
            this.GetScope().GetObjectById<T>(objectId);
        }
        catch (Telerik.OpenAccess.Exceptions.NoSuchObjectException)
        {
            return false;
        }
        return true;
    }
}

Of course this partial class should have the same name and namespace as your auto-generated context. Additionally, you should put it in a separate file so the method does not get deleted when the context is regenerated. Then you can just instantiate a context and call  the method.
Hope that helps.

Greetings,
Alexander
the Telerik team