Recreate an SPList withou loosing SPListItems

Question

I am migrating a Sharepoint 2007 to 2010 but, SPLists that are created using a schema definition are not having their forms/views visual upgraded.

After much consideration and effort I've tried to replace the forms with new forms but it fails.

The new schema is already in place in the available templates and new lists are being created with the 2010 forms correctly. As a List that has already been instanced cannot have it's schema changed I suppose the only way to go is to instance a new list.

Is there anyone who has done this or knows a simple way to achieve this through code on a SPFeatureReceiver?

Answer 1

We had migrated from MOSS 2007 to SPS 2010 and we were able to achieve it withoug any major issues, even we had custom list definitions. What we did was after migration wat to do a visual upgrade on the server, we changed all the list view webparts to XSLTListView webpart, upgraded the master page to 2010 version new master page and applied to the migrated sites. This gave the similar 2010 look and feel.

Answer 2

                                         SPLimitedWebPartManager webMgr = web.GetLimitedWebPartManager(strPageName, System.Web.UI.WebControls.WebParts.PersonalizationScope.Shared);

                                         web.AllowUnsafeUpdates = true;
                                         foreach (Microsoft.SharePoint.WebPartPages.WebPart wp in webMgr.WebParts)
                                         {

                                             if (wp.GetType().ToString().ToLower() == "microsoft.sharepoint.webpartpages.listviewwebpart")
                                             {
                                                 try
                                                 {


                                                     ListViewWebPart listWP = (ListViewWebPart)wp;
                                                     Microsoft.SharePoint.WebPartPages.XsltListViewWebPart xsltListWP = new XsltListViewWebPart();
                                                     xsltListWP.ListId = listWP.ListId;
                                                     xsltListWP.Title = listWP.Title;
                                                     xsltListWP.TitleUrl = listWP.TitleUrl;
                                                     xsltListWP.ToolTip = listWP.ToolTip;
                                                     xsltListWP.ViewId = listWP.ViewId;
                                                     xsltListWP.TitleIconImageUrl = listWP.TitleIconImageUrl;
                                                     xsltListWP.ZoneID = listWP.ZoneID;
                                                     xsltListWP.PartOrder = listWP.PartOrder;
                                                     xsltListWP.XmlDefinition = listWP.ListViewXml;
                                                     tobeAdded.Add(listWP.ID, xsltListWP);
                                                     tobeDeleted.Add(listWP.ID, listWP);
                                                 }
                                                 catch (Exception ex)
                                                 {
                                                     Utilities.LogToConsole("Exception occured while converting webpart : " + wp.Title + DateTime.Now.ToString("dd MM YYYY HH:mm:ss"), false);
                                                 }
                                             }
                                         }


                                         //add webpart
                                         foreach (string key in tobeAdded.Keys)
                                         {
                                             try
                                             {
                                                 bool addSucceeded = true;
                                                 Microsoft.SharePoint.WebPartPages.WebPart webPartTobeDeleted = (Microsoft.SharePoint.WebPartPages.WebPart)tobeDeleted[key];
                                                 Microsoft.SharePoint.WebPartPages.WebPart webPartTobeAdded = (Microsoft.SharePoint.WebPartPages.WebPart)tobeAdded[key];

                                                 //To add the webpart in webpart manager
                                                 try
                                                 {
                                                     webMgr.AddWebPart(webPartTobeAdded, webPartTobeDeleted.ZoneID, webPartTobeDeleted.ZoneIndex);
                                                 }
                                                 catch (Exception innerExp)
                                                 {
                                                     errCount++;
                                                     Utilities.LogToConsole("An exception occured while Adding webpart: " + webPartTobeAdded.Title + " for the site : " + web.Url.ToString() + " at the page: " + strPageName + " Exception Message " + innerExp.Message + DateTime.Now.ToString("dd MM YYYY HH:mm:ss"), false);
                                                     addSucceeded = false;

                                                 }
                                                 if (addSucceeded)
                                                 {
                                                     if (webPartTobeDeleted.IsClosed)
                                                     {
                                                         webMgr.CloseWebPart(webPartTobeAdded);
                                                     }
                                                     if (webPartTobeDeleted.FrameState == FrameState.Minimized)
                                                     {
                                                         webPartTobeAdded.FrameState = FrameState.Minimized;
                                                     }

                                                     webMgr.DeleteWebPart(webPartTobeDeleted);

                                                     //saving changes for close and minimize
                                                     webMgr.SaveChanges(webPartTobeAdded);
                                                 }




                                             }
                                             catch (Exception ex)
                                             {
                                                 errCount++;
                                                 Utilities.LogToConsole("An exception occured while Closing webpart: " + ((Microsoft.SharePoint.WebPartPages.WebPart)tobeAdded[key]).Title + " for the site : " + web.Url.ToString() + " at the page: " + strPageName + " Exception Message " + ex.Message + DateTime.Now.ToString("dd MM YYYY HH:mm:ss"), false);

                                             }


                                         }