Question

I developed a WCF Data Service, which runs fine, I can do every operation I want through.

I developed a small c# client which tests all functions: adding, removing, modifying, retrieving data.

Everything works fine on my visual studio server, but once I’m on the IIS Server:

• I can add/retrieve data
• I cannot edit data

When I try to edit data I get this error:

System.Data.Services.Client.DataServiceRequestException was unhandled
Message=Une erreur s’est produite lors du traitement de cette
requête.
Source=System.Data.Services.Client
StackTrace:
à System.Data.Services.Client.DataServiceContext.SaveResult.HandleBatchResponse()
à System.Data.Services.Client.DataServiceContext.SaveResult.EndRequest()
à System.Data.Services.Client.DataServiceContext.SaveChanges(SaveChangesOptions
options)
à System.Data.Services.Client.DataServiceContext.SaveChanges()
à WSTester.Program.ModifySomeThings(Entities entities) dans
D:\Workspace\10067.GfK
Telecontrol.TOM\Release\V3.1\WSTester\Program.cs:ligne 90
à WSTester.Program.Main(String[] args) dans
D:\Workspace\10067.GfK
Telecontrol.TOM\Release\V3.1\WSTester\Program.cs:ligne 23
à System.AppDomain._nExecuteAssembly(RuntimeAssembly
assembly, String[] args)
à System.AppDomain.ExecuteAssembly(String assemblyFile,
Evidence assemblySecurity, String[] args)
à Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
à System.Threading.ThreadHelper.ThreadStart_Context(Object
state)
à System.Threading.ExecutionContext.Run(ExecutionContext
executionContext, ContextCallback callback, Object state, Boolean
ignoreSyncCtx)
à System.Threading.ExecutionContext.Run(ExecutionContext
executionContext, ContextCallback callback, Object state)
à System.Threading.ThreadHelper.ThreadStart()
InnerException:
System.Data.Services.Client.DataServiceClientException
Message=
Strict//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd”>

401 – Unauthorized: Access is denied due to invalid
credentials.

.content-container{background:#FFF;width:96%;margin-top:8px;padding:10px;position:relative;}
–>

Server Error

401 – Unauthorized: Access is denied due to invalid
credentials.

You do not have permission to view this directory or page
using the credentials that you supplied.

Source=System.Data.Services.Client
StatusCode=401
StackTrace:
à System.Data.Services.Client.DataServiceContext.SaveResult.d__1e.MoveNext()
InnerException:

Which is strange, because I’ve all rights in my WCF Data service(and it works with visual studio), and I’m in anonymous mode in IIS, so I should have all rights to runs this query. IIS_USR has FULL CONTROL on the web folder, so I really don’t see what can be the problem

Answer 1

Try using the impersonation features of the app pool to user that has permissions. I have had many problems in the past using the default AppPoolIdentity features of IIS 7 and generally assign it to either a user setup for this very purpose or set it to use networkservice.

It is most likely that the pool doesn’t have the proper permissions to execute properly.