Newbie alert...

Ok - so I've generated an OData webservice using LLBLGen - and I've added a service reference to my .net winforms project.. So - I'm not linking to the data directly - but via a webservice

In my form I've added a datagridview, and a BindingSource

Set the Bindingsource.datasource =webservice.OneOfMyEntities Set the Datagridview datasource to the binding source - and my rows magically appear

Now - the question!

I can edit the cells in the grid but it doesnt seem to keep save to the data when I call the webservice.SaveChanges() Am I doing something stupid ? Can anyone point me in the right direction...

When you call SaveChanges, Are the entities actually changed?

If I debug.writeline the changed row in the bindingsource - it looks to have the new value in there. But - nothing seems to get called on the webservice when I call w.SaveChanges() (Even though I edited the row on the grid)

If you modify the entities directly and then call w.SaveChanges(), does that work? What runtime library version are you using? (http://www.llblgen.com/TinyForum/Messages.aspx?ThreadID=7720)

Yes - that works :

        user.Name = "Bob_"+newId;
        w.AddToUser(user);
        w.SaveChanges();

saves 'Bob_...' to my table..

But - doing it to the binding source doesnt.. ie. userBindingSource.Add(user);

adds it to my displayed grid - but w.SaveChanges doesnt save the new data to the database..

Like I said - I'm a newbie - so could be doing something really stupid!

Which runtime library version (build no.) are you using?

In the designer - "About" shows "3.5 Final - TRIAL"

But - I'm fairly sure its a "frontend" thing - which is only using code generating by Visual Studion when importing the service..

Please check the following link to know how to get the runtime library version http://www.llblgen.com/TinyForum/Messages.aspx?ThreadID=7720

The classes used on the client are the ones generated by VS.NET based on the OData service. The change tracking issue related to the grid binding is therefore out of our scope.

The context itself (the service) by default doesn't do any change tracking by itself. (Microsoft's design, not ours, this is completely MS code) You have to call UpdateObject() to mark it for update if you don't add custom code.

You can work around this by using this: http://msdn.microsoft.com/en-us/library/ee373844.aspx

Thanks - that was just what it needed..

I was aware this wasnt a LLBLGen problem - just didnt know where else to ask

For my future reference using :

        userBindingSource.DataSource =  new DataServiceCollection<UserEntity>(w.User);

instead of userBindingSource.DataSource = w.User;

seems to do the job..