/// <summary>
        /// 控件绑定事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void gdvStore_DataBound(object sender, EventArgs e)
        {
            for (int i = 0; i < this.gdvStore.Rows.Count; i++)
            {
                string strType = this.gdvStore.DataKeys[i]["storeType"].ToString().Trim();
                DropDownList dl2 = new DropDownList();
                dl2 = (DropDownList)gdvStore.Rows[i].Cells[7].FindControl("ddlStoreType");
                if (strType == "-1")//判断店铺推荐排行：-1：不推荐               
                    dl2.SelectedIndex = 0;
                if (strType == "0") //0:首页推荐
                    dl2.SelectedIndex = 1;
                if (strType == "1") //1:小说推荐
                    dl2.SelectedIndex = 2;

            }
        }

------解决方案--------------------
<%# Eval("")=="Yes"?"a.gif":"b.gif"%>

------解决方案--------------------
<img src='<%# Eval("字段").ToString()=="Yes"?"yes.gif":"no.gif"%>' />