ajax json 運用

1.建立News.ashx

 public void ProcessRequest(HttpContext context)        {            context.Response.ContentType = "text/plain";            string key = CommonClass.Request.GetRequest<string>("key", "");            string result = "";            if (key == "news")            {                result = GetNews();                context.Response.Write(result);            }        }        public string GetNews()        {            try            {                DataTable dt = BLL.GetDataTable("SELECT top 4 [InnerID] ,[Title] FROM web_News where [Isopen]=1 order by UpdateTime desc ");                if (!CommonClass.DTRow.CheckDtIsEmpty(dt))                {                    StringBuilder json = new StringBuilder();                    for (int i = 0; i < dt.Rows.Count; i++)                    {                        json.Append("{");                        json.Append("innerid:'" + dt.Rows[i]["InnerID"].ToString() + "'");                        json.Append(",title:'" + dt.Rows[i]["Title"].ToString() + "'");                        json.Append("},");                    }                    return "[" + json.ToString() + "]";                }                else                {                    return string.Empty;                }            }            catch (Exception ex)            {                AppLog.Write("新聞擷取異常！[異常資訊：" + ex.Message + "]", AppLog.LogMessageType.Info);                return string.Empty;            }        }

2.頁面ajax

//擷取新聞         function GetNews() {            jQuery.ajax({                type: 'get',                url: 'Handler/News.ashx',                data: 'key=news',                //dataType: 'json',                cache: false,                success: function (result) {                    var jsonobj = eval(result);                    for (i = 0; i < jsonobj.length; i++) {                        $("#ul_news").append("<li><a href='News/infor?InnerID=" + jsonobj[i].innerid + "' target=\"_blank\" title=\"" + jsonobj[i].title + "\">" + jsonobj[i].title + "</a></li>")                    }                }            });        }