WebEditUtilPart2.cs

// Decompiled with JetBrains decompiler
// Type: Sitecore.Web.WebEditUtil
// Assembly: Sitecore.Kernel, Version=8.1.0.0, Culture=neutral, PublicKeyToken=null
// 
// NOTE: This is not the complete implementation, only fractions of the important parts related to the date and time.
// 

namespace Sitecore.Web
{
  public static class WebEditUtil
  {
    public static string SiteName
    {
      get
      {
        SiteRequest request = Context.Request;
        Assert.IsNotNull((object) request, "Site request not found.");
        
        // This is the part where things are not being resolved correct, since the 'sc_pagesite' is not the correct query param name
        return Assert.ResultNotNull<string>(string.IsNullOrEmpty(request.QueryString["sc_pagesite"]) ? Settings.Preview.DefaultSite : request.QueryString["sc_pagesite"]);
      }
    }
    
    // code omitted...
  }
}