Sharepoint 2013 ItemAdded event receiver for renaming files is not working

Question

In SP 2013 I coded an event receiver that intercepts the ItemAdded event and it just renames the file.
It is a synchronous event (I added <Synchronization>Synchronous</Synchronization> in the Elements.xml).
This is the code:
        public override void ItemAdded(SPItemEventProperties properties)
            SPSecurity.RunWithElevatedPrivileges(delegate()
                try
                    OutputDebugStringA("Inside ItemAdded");
                    string szHttpUrl = properties.WebUrl + "/" + properties.AfterUrl;
                    SPWeb openedWeb = properties.Web.Site.OpenWeb(properties.Web.ID);
                    SPFile spf = openedWeb.GetFile(szHttpUrl);
                    EventFiringEnabled = false;
                    string szUrl = properties.AfterUrl;
                    szUrl = szUrl + ".renamed";
                    string szNewFileName;
                    if (szUrl.LastIndexOf('\\') != -1) szNewFileName = szUrl.Substring(szUrl.LastIndexOf('\\') + 1);
                    else if (szUrl.LastIndexOf('/') != -1) szNewFileName = szUrl.Substring(szUrl.LastIndexOf('/') + 1);
                    else szNewFileName = szUrl;
                    if (properties.ListItem != null)
                        properties.ListItem["Title"] = szNewFileName;
                        properties.ListItem.Update();
                    spf.MoveTo(szUrl);
                    EventFiringEnabled = true;
                    base.ItemAdded(properties);
                    OutputDebugStringA("Renaming to " + szUrl);
                catch (System.Exception exception)
                    OutputDebugStringA("ItemAdded ERROR: " + exception.ToString());
The problem is that when I upload a .txt file using Internet Explorer, just after the renaming is done, IE says that something went wrong and when I inspect the log files I see:
SPRequest.GetFileAndFolderProperties: UserPrincipalName=i:0).w|s-1-5-21-4050800873-4278272723-3073177257-500, AppPrincipalName= ,bstrUrl=http://sp2013/sites/demo/subsite1 ,bstrStartUrl=Shared Documents/test2.txt ,ListDocsFlags=16400 ,bThrowException=True 0fa7689c-674b-5045-c3a2-b214a5d4cbed
01/09/2014 15:29:26.75  w3wp.exe (0x1544)                        0x16F4 SharePoint Foundation        
 General                        ai1wu Medium   System.IO.FileNotFoundException: <nativehr>0x80070002</nativehr><nativestack></nativestack>,
StackTrace:    at Microsoft.SharePoint.SPWeb.GetFileOrFolderProperties(String strUrl, ListDocsFlags listDocsFlags, Boolean throwException, SPBasePermissions& permMask)     at Microsoft.SharePoint.SPFile.PropertiesCore(Boolean
throwException)     at Microsoft.SharePoint.SPFile.get_Length()     at Microsoft.Office.RecordsManagement.PolicyFeatures.ApplicationPages.UploadPage.OnSubmit(Object o, EventArgs e)     at Microsoft.Office.RecordsManagement.PolicyFeatures.ApplicationPages.UploadExPage.OnSubmit(Object
o, EventArgs e)     at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)     at System.Web.UI.Page.ProcessRequest(Boolean includeSta... 0fa7689c-674b-5045-c3a2-b214a5d4cbed
...gesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)     at System.Web.UI.Page.ProcessRequest()     at System.Web.UI.Page.ProcessRequest(HttpContext context)     at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()    
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)     at System.Web.HttpApplication.PipelineStepManager.ResumeSteps(Exception error)     at System.Web.HttpApplication.BeginProcessRequestNotification(HttpContext
context, AsyncCallback cb)     at System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context)     at System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr
rootedObjectsPointer, IntPtr nativeRequestContex... 0fa7689c-674b-5045-c3a2-b214a5d4cbed
...t, IntPtr moduleData, Int32 flags)     at System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr rootedObjectsPointer, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)     at System.Web.Hosting.UnsafeIISMethods.MgdIndicateCompletion(IntPtr
pHandler, RequestNotificationStatus& notificationStatus)     at System.Web.Hosting.UnsafeIISMethods.MgdIndicateCompletion(IntPtr pHandler, RequestNotificationStatus& notificationStatus)     at System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr
rootedObjectsPointer, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags)     at System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr rootedObjectsPointer, IntPtr nativeRequestContext, IntPtr moduleData, Int32 flags) 
 0fa7689c-674b-5045-c3a2-b214a5d4cbed
So it is clear that the fact that I renamed the file is causing an issue in the SharePoint upload logic.
As a solution what I did was to not declare it as Synchronous, but if I do it then there is another error when Sharepoint shows the Edit Properties dialog... in this case the upload is OK but when it is time to show that Edit Property dialog IE fails and
says that the file has been already modified, or that "something went wrong".
If I use a synchronous event I get one problem. If I use the asynchronous event I get another problem... It's very frustating and I am pretty sure that a so important API like Event Receivers should have support renaming files so I hope someone can tell
me what I am doing wrong.
Thanks in advance

Answer 1

May be you want to consider using the following code and see if it works for you.
http://social.msdn.microsoft.com/Forums/sharepoint/en-US/40c78e03-2dca-4083-89d2-a7430099da68/how-do-i-change-the-name-property-of-a-file-in-a-document-library?forum=sharepointdevelopment
Amit