protected void btnSaveCat_Click(object sender, EventArgs e)
        {
            try
            {
                if (tvCats.SelectedNode != null)
                {
                    using (CatalogDataContext dct = new CatalogDataContext())
                    {
                        Mapping_Category mc = new Mapping_Category() { id = System.Guid.NewGuid(), ss_cat_id = ddlSSCats.SelectedValue, ss_cat_name = ddlSSCats.SelectedItem.Text, tb_cid = long.Parse(tvCats.SelectedValue), tb_name = tvCats.SelectedNode.Text };
                        dct.Mapping_Categories.InsertOnSubmit(mc);
                        dct.SubmitChanges();
                    }

                }
                else
                    throw new ApplicationException("请选择淘宝分类");
            }
            catch (Exception ex)
            {

                string message = ex.Message.Replace("\n", "\\n").Replace("\r", "").Replace("'", "\\'");
                ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alertMessage", "alert('" + message + "')", true);
            }
        }
 partial void DeleteMapping_Category(Mapping_Category instance);
 partial void InsertMapping_Category(Mapping_Category instance);
 partial void UpdateMapping_Category(Mapping_Category instance);
		private void detach_Mapping_Categories(Mapping_Category entity)
		{
			this.SendPropertyChanging();
			entity.TB_ItemCat = null;
		}