搞来有搞去终于有了个结果，主要是一开始犯了一些低级错误。
对于json不太了解的童鞋，可以看看这个：
这个例子中主要是从数据库中读取数据，转换成JSON格式，传递给前端，废话少说上代码：
protected void Page_Load(object sender, EventArgs e) { string b = Request["callback"]; string name = Context.Request["name"]; //数据库操作 SqlConnection thisConnection = new SqlConnection("Data Source=localhost;Initial Catalog=commodities; uid=sa;Password=123"); string command = "select * from InterestStore where UserID = " + name; SqlDataAdapter thisAdapter = new SqlDataAdapter(command, thisConnection); SqlCommandBuilder thisCommandBuilder = new SqlCommandBuilder(thisAdapter); DataSet thisDataSet = new DataSet(); thisAdapter.Fill(thisDataSet, "IStore"); //将数据表转换成JSON数据 string ss = GetJson(thisDataSet, "IStore"); //返回到前端 Response.Write(ss); Response.End();//Response.End把前面的内容都输出了，阻止了后面html相关内容的输出 } 下面是将数据转化成JSON代码（改了好长时间，哈哈）
////// 获取Json数据 /// /// 数据集 /// 表名 ///private string GetJson(DataSet dSet, string strTableName) { StringBuilder sBuilder = new StringBuilder(); sBuilder.Append("{ "); //sBuilder.Append(" " + strTableName + ":{"); sBuilder.Append("\"" + strTableName +"\":["); try { for (int i = 0; i < dSet.Tables[strTableName].Rows.Count; i++) { sBuilder.Append("{ "); for (int j = 0; j < dSet.Tables[strTableName].Columns.Count; j++) { sBuilder.AppendFormat("\"{0}\":\"{1}\",", dSet.Tables[strTableName].Columns[j].ColumnName, dSet.Tables[strTableName].Rows[i][j].ToString()); } sBuilder.Remove(sBuilder.ToString().LastIndexOf(','), 1); sBuilder.Append("},"); } sBuilder.Remove(sBuilder.ToString().LastIndexOf(','), 1); sBuilder.Append("]"); sBuilder.Append("}"); //sBuilder.Append(" };"); return sBuilder.ToString(); } catch (Exception es){ throw new Exception(es.Message); } }
前台返回的数据：
{"IStore":[{"SOIID":"1 ","UserID":"001 ","StoreID":"47 ","Attention":"10"},{"SOIID":"2 ","UserID":"001 ","StoreID":"77 ","Attention":"8"},{"SOIID":"3 ","UserID":"001 ","StoreID":"81 ","Attention":"8"},{"SOIID":"4 ","UserID":"001 ","StoreID":"42 ","Attention":"7"},{"SOIID":"5 ","UserID":"001 ","StoreID":"81 ","Attention":"6"},{"SOIID":"6 ","UserID":"001 ","StoreID":"114 ","Attention":"6"},{"SOIID":"7 ","UserID":"001 ","StoreID":"106 ","Attention":"8"},{"SOIID":"8 ","UserID":"001 ","StoreID":"116 ","Attention":"6"}]}
前台执行ajax调用的代码
xhr.get({ //请求页面 url: "WebForm3.aspx", //参数 content: { name: sname }, //数据格式 handleAs: "json", //当执行成功时调用的方法 load: function (newContent) { try { var str = newContent; console.log(str); console.log("ddddddddddddddddddd"); console.log(dojo.toJson(str)); } catch (err) { console.log(err); } //dom.byId("txtSuggestion").value = people.programmers[0].lastName; dom.byId("txtSuggestion").value = newContent.IStore[2].StoreID; }, //失败时调用的方法 error: function (err) { //alert("error"); alert(err); } });