private bool DoEdit(int _id)
    {
        bool result = false;

        ps_product_category model = new ps_product_category();

        if (model.Exists(txttitle.Text.Trim(), _id))
        {
            mym.JscriptMsg(this.Page, "您输入的商品类别名称已经存在,请检查!", "", "Error");
            return(false);
        }
        model.GetModel(_id);

        model.title   = txttitle.Text.Trim();
        model.sort_id = int.Parse(txtSortId.Text.Trim());
        model.remark  = txtremark.Text.Trim();

        if (model.Update())
        {
            mym.AddAdminLog("修改", "修改商品类别:" + txttitle.Text); //记录日志
            result = true;
        }

        return(result);
    }
    private bool DoAdd()
    {
        ps_product_category model = new ps_product_category();

        if (model.Exists(txttitle.Text.Trim()))
        {
            mym.JscriptMsg(this.Page, "您输入的商品类别名称已经存在,请检查!", "", "Error");
            return(false);
        }

        model.title   = txttitle.Text.Trim();
        model.sort_id = int.Parse(txtSortId.Text.Trim());
        model.remark  = txtremark.Text.Trim();
        if (model.Add() > 0)
        {
            mym.AddAdminLog("增加", "添加商品类别:" + txttitle.Text); //记录日志
            return(true);
        }

        return(false);
    }