Question

I have a problem with a oneway web method that open a moss site (probably because in a oneway webmethod the context is null)

Is possible to rewrite this code to remove the null reference exception? (without the oneway attribute i don’t have the exception)

[SoapDocumentMethod(OneWay = true)]         [WebMethod(Description = 'TestOneWay')]         public voidTestOneWay(string webUrl)         {             using (SPSite site = new SPSite(webUrl))             {                  ....             }          } 

the exception is:

[2304] Error:Object reference not set to an instance of an object. [2304] w3wp.exe Error: 0 : [2304StackTrace:   at System.Web.Hosting.ISAPIWorkerRequestInProc.GetAdditionalServerVar(Int32 index) [2304]    at System.Web.Hosting.ISAPIWorkerRequestInProc.GetServerVariable(String name) [2304]    at System.Web.HttpRequest.AddServerVariableToCollection(String name) [2304]    at System.Web.HttpRequest.FillInServerVariablesCollection() [2304]    at System.Web.HttpServerVarsCollection.Populate() [2304]    at System.Web.HttpServerVarsCollection.Get(String name) [2304]    at System.Collections.Specialized.NameValueCollection.get_Item(String name) [2304]    at Microsoft.SharePoint.SPGlobal.CreateSPRequestAndSetIdentity(Boolean bNotGlobalAdminCode, String strUrl, Boolean bNotAddToContext, Byte[] UserToken, String userName, Boolean bIgnoreTokenTimeout, Boolean bAsAnonymous) [2304]    at Microsoft.SharePoint.SPRequestManager.GetContextRequest(SPRequestAuthenticationMode authenticationMode) [2304]    at Microsoft.SharePoint.Administration.SPFarm.get_RequestNoAuth() [2304]    at Microsoft.SharePoint.SPSite.CopyUserToken(SPUserToken userToken) [2304]    at Microsoft.SharePoint.SPSite.SPSiteConstructor(SPFarm farm, Guid applicationId, Guid contentDatabaseId, Guid siteId, SPUrlZone zone, Uri requestUri, String serverRelativeUrl, Boolean hostHeaderIsSiteName, Uri redirectUri, Pairing pairing, SPUserToken userToken) [2304]    at Microsoft.SharePoint.SPSite..ctor(SPFarm farm, Uri requestUri, Boolean contextSite, SPUserToken userToken) [2304]    at Microsoft.SharePoint.SPSite..ctor(String requestUrl) [2304]    at Reply.Moss2EAI.SPHandler.GetAllFlowConfiguration(String webUrl, String flowConList) [2304]    at Reply.Moss2EAI.EaiMossIntegration.GetMessagesFromEai(String webUrl, String listName, String applicationName) 

Answer 1

i have found a workaround to solve my problem.Create new HttpContext. The question now is: is it the right solution or there are implications that i don’t consider?

the method that i use to change the context is this:

//Call this before call new SPSite()  private static void ChangeContext(string webUrl)         {             Trace.TraceInformation('ChangeContext');             HttpContext current = HttpContext.Current;             HttpRequest request = new HttpRequest('', webUrl, '');             HttpContext.Current = new HttpContext(request, new HttpResponse(new StringWriter(CultureInfo.CurrentCulture)));             HttpContext.Current.User = current.User;         }