Set service field value in Dynamic Data

Question

In my project many tables are linked to aspnet_Application table by ApplicationId foreign key. I don't want the users to view or edit it, so I'm looking for way to preset this sql table field value before the insert query is executed. I still have scaffolding enabled for this column (in order for DD to generate the right sql script) but I'm hiding this column/field in all my edit/list/insert pages.

Ideally I'm looking for a place to inject my code right before DynamicInsert is executed for any table in my LinqToSql class.

Thanks

Answer 1

So after some digging around I came up with an acceptable solution. I've created a partial class for my data context and added a partial Insert_ method for every table that's linked to the aspnet_Applications. In every method I set the ApplicationId field to current application id.

It looks like this:

public partial class MyDataContext
{
    partial void InsertMyTable(MyTable instance)
    {
        instance.ApplicationId = HttpContext.Current.Session["ApplicationId"] as Guid?;
    this.ExecuteDynamicInsert(instance);
    }
}

Note that you can't execute other LINQ statements while in this method. In particular I had to store the application id in session rather than querying the aspnet_Applications table.

While this is acceptable solution it isn't perfect (a lot of repetitive code) so if anyone knows better throw me a bone here :)