Consume WCF Data service in client application throws error - wcf

Question

I am working on WCF Data service which imported stored procedure, as below.
[WebGet]
public List<GetMTSearchResultTest_Result> GettMTSearchResultTest()
{
MediaMarketResearch_PRODEntities ent = new MediaMarketResearch_PRODEntities();
return ent.GetMTSearchResultTest().ToList();
}
when i consuming this in my client application it says error as "The closed type MMRClient.MMRServiceReference.GetMTSearchResultTest_Result does not have a corresponding element settable property."
I am getting this error while bind to the grid view as below.
DataServiceContext context = new DataServiceContext(new Uri("http://localhost:4131/MMRDataService.svc/"));
IEnumerable<GetMTSearchResultTest_Result> empResult = context.Execute<GetMTSearchResultTest_Result>(new Uri("http://localhost:4131/MMRDataService.svc/GettMTSearchResultTest"));
GridView1.DataSource = empResult;
GridView1.DataBind();
Note: I imported this stored proc as complex type.
Please advice me on this.
Regards,
Jaydeep

Answer 1

I think this link may help you (see the selected answer).
Essentially, what the solution may be is to create a partial class for GetMTSearchResultTest_Result and decorate it with a DataServiceKey attribute, providing a non-nullable column that acts as a primary key (although I don't think it has to be unique).
So your partial class would look something like:
[DataServiceKey("YourKeyColumnName")]
public partial class GetMTSearchResultTest_Result {
}
If you're just doing reads, I don't think you'll need any implementation.
Hopefully this works. Let me know if there are issues/questions and I'll update accordingly.

Answer 2

You can always make a new service reference to a non data service. That is to a normal WCF service. You can simply have a [ContractOperation] returning a list of the troubled "complex types" and that's it.
This way you would have two services the original data service and a new normal WCF service. But this shouldn't be such an issue. You don't have to make the troubled "complex type" as a Entity.