尝试从数据库表中删除单个记录时，实体框架'401 Not Authorized'

Question

I am getting a '401 - Not Authorized' error message returned when I attempt to delete a single record from a database table using Entity Framework.

The database table definitely has the correct permissions and the .svc file for entity framework is set to:

config.SetEntitySetAccessRule("*", EntitySetRights.All);

The code I am using for the delete in my application is very simple:

MyObject myObj = this.MyObjects.SingleOrDefault(t => t.RecordID == recordID);
svc.DeleteObject(myObj);
svc.SaveChanges();

'MyObject' refers to an item from an EntityObject which I have extracted into lists.

The code seems correct, as it recognises the object to be deleted. The following log entry shows what is happening on the service:

2012-02-27 11:06:02 192.XXX.X.XXX DELETE /MyService.svc/MyObjects(19) - 8010 - 192.XXX.XX> Microsoft+ADO.NET+Data+Services 401 0 0 1

Can anyone shed any light on why this might be happening?

EDIT: Fetching data and adding new lines to the same table currently works with no problems.

Answer 1

It looks like your WCF service requires authorisation/authentication of some sort and you are not properly authorised. Check your WCF config, and authenticate your client appropriately.

Answer 2

Turns out it is some kind of issue with file permissions on the actual .svc file.

I solved the problem by granting my ApplicationPool identity for the service Modify permissions on the /MyService.svc file.

I picked up this tip from this post: http://social.msdn.microsoft.com/Forums/eu/adodotnetdataservices/thread/987b5808-d1d3-41a6-be80-206ead679f46