Tuesday, July 9, 2013

Delete Social Tags in SharePoint 2010 using C#

Hi all,
I've recently wanted to delete social tags when I am deploying my wsp using powershell. I started writing the code and was able to retrieve the social tags but was not able to delete them. When I attempted to delete them an exception was thrown. More like an Unauthorized exception. Read this for more information on it.

But I was able to find this blog post which helped me out in solving the issue.  I was able to create a console program using C# to delete the social tags of SharePoint 2010. I havent tested it much. Feel free to modify the code.
using System;
using System.Globalization;
using System.IO;
using System.Reflection;
using System.Security.Principal;
using System.Web;
using Microsoft.Office.Server.SocialData;
using Microsoft.Office.Server.UserProfiles;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Taxonomy;

namespace RemoveTags
    class Program
        static void Main(string[] args)
            using (SPSite site = new SPSite(args[0]))
                using (SPWeb web = site.OpenWeb())
                    Console.ForegroundColor = ConsoleColor.Cyan;
                    Console.WriteLine("Deleting all tags");
                    foreach (SPUser user in site.OpenWeb().AllUsers)
                        if (!user.IsDomainGroup && user.LoginName != "NT AUTHORITY\\LOCAL SERVICE" && user.LoginName != "SHAREPOINT\\system")
                            web.AllowUnsafeUpdates = true;
                            Console.WriteLine("Deleting tags for : " + user.Name);
                            HttpRequest request = new HttpRequest("", args[0], "");
                            HttpContext.Current = new HttpContext(request, new HttpResponse(new StringWriter(CultureInfo.CurrentCulture)));
                            HttpContext.Current.Items["HttpHandlerSPWeb"] = web;
                            WindowsIdentity wi = WindowsIdentity.GetCurrent();
                            typeof(WindowsIdentity).GetField("m_name", BindingFlags.NonPublic | BindingFlags.Instance).SetValue(wi, user.LoginName);
                            HttpContext.Current.User = new GenericPrincipal(wi, new string[0]);
                            WindowsIdentity wi2 = WindowsIdentity.GetCurrent();
                            SPServiceContext serviceContext = SPServiceContext.GetContext(HttpContext.Current);
                            SocialTagManager socialTagManager = new SocialTagManager(serviceContext);
                            SPServiceContext context = SPServiceContext.GetContext(site);
                            UserProfileManager usrPrfMngr = new UserProfileManager(context);
                            UserProfile usrPrf = usrPrfMngr.GetUserProfile(user.LoginName);
                            SocialTag[] tags = socialTagManager.GetTags(usrPrf);

                            foreach (SocialTag tag in tags)
                                Term term = tag.Term;
                                socialTagManager.DeleteTag(tag.Url, term);


                    web.AllowUnsafeUpdates = false;

                    Console.WriteLine("All tags are deleted");

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