How to get domain\user notation of an account if it is in claim format

You can convert claim format into domain\user format  ;

string Username;
SPClaimProviderManager
mgr = SPClaimProviderManager.Local;
if (mgr != null && SPClaimProviderManager.IsEncodedClaim(SPContext.Current.Web.CurrentUser.LoginName))
           {
Username= mgr.DecodeClaim(SPContext.Current.Web.CurrentUser.LoginName).Value;
           }
else
          {
Username= SPContext.Current.Web.CurrentUser.LoginName;
}

 

More details of the SPClaimProviderManager methods:
http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.administration.claims.spclaimprovidermanager_methods.aspx

 

 

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