用户控件之重写HTML代码

        #region 参数属性

        //排列方式
        int m_Type = 0;
        public int Type
        {
            get { return m_Type; }
            set { m_Type = value; }
        }

        //商品类别
        int m_ProductClass = -1;
        public int ProductClass
        {
            get { return m_ProductClass; }
            set { m_ProductClass = value; }
        }

        //品牌类型
        int m_BrandCategory = 0;
        public int BrandCategory
        {
            get { return m_BrandCategory; }
            set { m_BrandCategory = value; }
        }

        //显示条数
        int m_ListNum = 0;
        public int ListNum
        {
            get { return m_ListNum; }
            set { m_ListNum = value; }
        }

        //排序字段
        string m_Orderfield = "Id";
        public string Orderfield
        {
            get { return m_Orderfield; }
            set { m_Orderfield = value; }
        }

        //WHERE条件
        string m_WhereStr = "";
        public string WhereStr
        {
            get { return m_WhereStr; }
            set { m_WhereStr = value; }
        }

        string m_Text = "";

        public string Text
        {
            get { return m_Text; }
            set { m_Text = value; }
        }

        #endregion

        #region 获取商品列表HTML信息

        public void GetListMsg()
        {
            StringBuilder str = new StringBuilder();
            try
            {
                UcOpration opt = new UcOpration();
                opt.ProductClass = ProductClass;
                opt.BrandCategory = BrandCategory;
                opt.ListNum = ListNum;
                opt.Orderfield = Orderfield;
                opt.WhereStr = WhereStr;

                str.Append("<ul>");

                IList list = idbuc.ReadList(opt);
                for (int i = 0; i < list.Count; i++)
                {
                    UcList uclist = (UcList)list[i];

                    string listStr = GetContent();
                    if (Type == 1)
                        listStr = string.Format(listStr, "/Product/ProductDetail.aspx?id=" + uclist.Id, uclist.Img, uclist.ProductName, uclist.ProductName, uclist.OldPrice, uclist.NewPrice);
                    else if (Type == 2)
                        listStr = string.Format(listStr, "/Product/ProductDetail.aspx?id=" + uclist.Id, uclist.Img, uclist.ProductName, uclist.ProductName, uclist.NewPrice);
                    else if (Type == 3)
                        listStr = string.Format(listStr, "/Product/ProductDetail.aspx?id=" + uclist.Id, uclist.ProductName);
                    str.Append(listStr);
                }

                str.Append("</ul>");
            }
            catch (Exception ex)
            {
                str.Append(ex.Message);
            }
            Text = str.ToString();
          
        }
      
        //内容信息
        private string GetContent()
        {
            if (Type == 1)
                return @"
                <li>
                    <a href='{0}' target='_blank'>
                    <img src='{1}' alt='{2}' />
                    <div class='item'>
                        {3}
                        <label class='original-price'>{4}</label>
                        <label class='special-price'>{5}</label>
                    </div>
                    </a>
                </li>";
            else if (Type == 2)
                return @"
                <li>
                    <a href='{0}' target='_blank'>
                     <img src='{1}' alt='{2}' />
                        <div>{3}</div>
                        <span><label class='special-price'>{4}</label></span>
                    </a>
                </li>";
            else
                return @"
                <li>
                    <a href='{0}' target='_blank'>{1}</a>
                </li>";
        }

        #endregion

        #region 输出商品列表HTML信息

        protected override void Render(HtmlTextWriter writer)
        {
            writer.Write(this.Text.ToString());
        }

        #endregion

源代码调用
<uc1:ProductListTag id="Tag1" Type="1" ProductClass="-1" BrandCategory="0" ListNum="6" Orderfield="Id" WhereStr="" runat = "server" ></uc1:ProductListTag>