protected void AddStudent_Click(object sender, EventArgs e)
 {
     if (!TagSelectionCB.SelectedValue.Equals(String.Empty) && !GroupIds.Contains(Convert.ToInt32(TagSelectionCB.SelectedValue)))
     {
         TagListField.Value += (TagListField.Value.Length > 0 ? "," : "") + TagSelectionCB.SelectedValue;
     }
     LoadTable();
     TagSelectionCB.ClearSelection();
 }
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                using (WebhostEntities db = new WebhostEntities())
                {
                    TagSelectionCB.DataSource     = db.WebPageTags.ToList();
                    TagSelectionCB.DataTextField  = "Name";
                    TagSelectionCB.DataValueField = "id";
                    TagSelectionCB.DataBind();

                    RemoveList.DataSource     = db.WebPageTags.Where(p => GroupIds.Contains(p.id)).ToList();
                    RemoveList.DataTextField  = "Name";
                    RemoveList.DataValueField = "id";
                    RemoveList.DataBind();
                }
            }

            LoadTable();
        }