heml Ajax 通过Asp.net访问数据库(以Sql Server为例)
假设从数据库提取数据,在html页面中显示:
1,建立服务器后端处理程序
添加“一般处理程序”,如下图
2.编写“Handler2.ashx”代码,如下:
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Script.Serialization;
namespace WebApplication5
{ /// <summary> /// Handler1 的摘要说明 /// </summary> public class Handler1 : IHttpHandler
{ public void ProcessRequest(HttpContext context)
{ //采用EF从数据库中提取数据 WeatherDBEntities weatherDbcontext = new WeatherDBEntities();
var dataset = from data in weatherDbcontext.T_Station
select new { data.StationName, data.StationPosition, data.Lat, data.Lon };
JavaScriptSerializer tool = new JavaScriptSerializer();
context.Response.ContentType = "text/plain" ; //字符串形式
context.Response.Write(tool.Serialize(dataset)); //将字符串编码为JSON类型
// //备注,要从javascript中传参数的话,如下代码,data就是传递的参数。而在本文件中,通过context.request("zipcode")来获取 //如context.Response.Write(context.Request.Params["zipcode"]); // $.ajax({ // url: "/api/getWeather", //data: { // zipcode: 97201 //}, // success: function( data ) { // $( "#weather-temp" ).html( "<strong>" + data + "</strong> degrees" ); // } //}); } public bool IsReusable
{ get { return false ;
} } } } |
3.添加Html页面:HtmlPage1.html
4.结果如下
附件:http://down.51cto.com/data/2363693
本文转自 huohe2009 51CTO博客,原文链接:http://blog.51cto.com/zhaojie/1317940