Question

I have a WCF data service, my client is a WPF app.

I have a service operation in my WCF data services. something like that

[WebGet]
public IQueryable<VSuppliersExtra> GetAllVSuppliers()
{
    List<VSuppliersExtra> lstVsup = new List<VSuppliersExtra>();
    // add some VSuppliersExtra entities to the list
    ........
    return lstVsup.AsQueryable<VSuppliersExtra>();            
}

In my client I have

oCollection = new ObservableCollection<VSuppliersExtra>(jp.CreateQuery<VSuppliersExtra>("GetAllVSuppliers"));
//Open a new window Change collection and update the changes in the DB
.......
//run the same query again
.......
oCollection = new ObservableCollection<VSuppliersExtra>(jp.CreateQuery<VSuppliersExtra>("GetAllVSuppliers"));

Now, everything work just fine, BUT the 2nd call for the service operation will always get me the same results without the changes, until I restart my app.
I check the DB, all my changes are saved to the SQL server, I’ve checked the function in the service, and it does return the updated data… YET I get the same result set!!!!
Is there some caching in the client side????

Answer 1

Well,
I found some article http://msdn.microsoft.com/en-us/library/gg602811.aspx
I added a context.MergeOptions = MergeOption.OverwriteChanges;

That did the Trick.

Thank you