protected void LinkButtonAddCategory_Click(object sender, EventArgs e)
        {
            int parentID = TreeViewCategories1.SelectedNodeID;
            
            //if (int.TryParse(TreeViewCategories1.SelectedNodeID, out parentID))
            {
                CategoriesActions categoriesActions = new CategoriesActions();
                Categories categories = new Categories();
                categories.Name = TextBoxAddCategory.Text;

                int createdID = categoriesActions.AddCategoty(categories, parentID);
                TreeNode treeNode = new TreeNode(categories.Name, createdID.ToString());
                //TreeViewManage.SelectedNode.ChildNodes.Add(treeNode);
                TreeViewCategories1.SelectedNodeCollection.Add(treeNode);
            }
            TextBoxAddCategory.Text = "";
            PanelAddCategory.Visible = false;
        }