标签:datetime ashx file generic tar ber pass ext ade
ajax:
一般处理程序(数据接口):ashx
跨语言传递数据:
xml:
结构不清晰
代码量比较大
查找起来比较费事
非面向对象结构
json:
结构清晰
代码量相对较小
面向对象的处理解析方式,查找数据很简单
键值对
{"key1":"value","key2":"value"}
多个对象的json
[{"key1":"value","key2":"value"},{"key1":"value","key2":"value"},{"key1":"value","key2":"value"}]
下面公用的实体类、数据访问类:
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Data.SqlClient; /// <summary> /// user 的摘要说明 /// </summary> public class user { SqlConnection conn = null; SqlCommand cmd = null; public user() { conn = new SqlConnection("server=.;database=data0928;user=sa;pwd=123"); cmd = conn.CreateCommand(); } public string username { get; set; } public string nickname { get; set; } public string password { get; set; } public bool sex { get; set; } public DateTime birthday { get; set; } public string nation { get; set; } public string Class { get; set; } public int age { get { int a; a = DateTime.Now.Year - this.birthday.Year; return a; } } public string nationname { get { string end = ""; if (this.nation == "n001") { end = "汉族"; } if (this.nation == "n002") { end = "苗族"; } if (this.nation == "n003") { end = "壮族"; } if (this.nation == "n004") { end = "彝族"; } return end; } } public string classname { get { string end = ""; cmd.CommandText = "select *from class where classcode=‘"+this.Class+"‘"; conn.Open(); SqlDataReader dr = cmd.ExecuteReader(); if (dr.HasRows) { dr.Read(); end = dr["classname"].ToString(); } conn.Close(); return end; } } }
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Data.SqlClient; /// <summary> /// userdata 的摘要说明 /// </summary> public class userdata { SqlConnection conn = null; SqlCommand cmd = null; public userdata() { conn = new SqlConnection("server=.;database=data0928;user=sa;pwd=123"); cmd = conn.CreateCommand(); } public user select(string uname) { user u = null; cmd.CommandText = "select*from users where username=‘"+uname+"‘"; conn.Open(); SqlDataReader dr = cmd.ExecuteReader(); if (dr.HasRows) { dr.Read(); u = new user(); u.username = dr["username"].ToString(); u.nickname = dr["nickname"].ToString(); u.password = dr["password"].ToString(); u.sex = Convert.ToBoolean(dr["sex"]); u.birthday = Convert.ToDateTime(dr["birthday"]); u.nation = dr["nation"].ToString(); u.Class = dr["class"].ToString(); } conn.Close(); return u; } public List<user> select(int count,int number) { List<user> ulist = new List<user>(); cmd.CommandText = "select top "+count+" * from users where ids not in(select top "+((number-1)*count)+" ids from users)"; conn.Open(); SqlDataReader dr = cmd.ExecuteReader(); if (dr.HasRows) { while (dr.Read()) { user u = new user(); u.username = dr["username"].ToString(); u.nickname = dr["nickname"].ToString(); u.password = dr["password"].ToString(); u.sex = Convert.ToBoolean(dr["sex"]); u.birthday = Convert.ToDateTime(dr["birthday"]); u.nation = dr["nation"].ToString(); u.Class = dr["class"].ToString(); ulist.Add(u); } } conn.Close(); return ulist; } }
例子一:实时加载判断,展示数据
aspx文件中:包含ajax的基本写法
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <script src="js/jquery-1.7.2.min.js"></script> </head> <body> <form id="form1" runat="server"> <div> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> <table style="width:100%; background-color:navy;color:white;text-align:center;"> <tr> <td>密码</td> <td>昵称</td> <td>性别</td> <td>生日</td> <td>年龄</td> <td>民族</td> <td>班级</td> </tr> <tr style="background-color:gray;"> <td id="t1"></td> <td id="t2"></td> <td id="t3"></td> <td id="t4"></td> <td id="t5"></td> <td id="t6"></td> <td id="t7"></td> </tr> </table> </div> </form> </body> </html> <script> var t = document.getElementById("TextBox1"); t.onkeyup = function () { var c = t.value; $.ajax({ url:"ajax/bb.ashx",//请求提交服务端 data: {"sd":c},//给服务端带的数据,可以没有,也可以多个 type: "post",//数据传递的方式 dataType: "json",//数据传递的格式 success: function (s) { document.getElementById("Label1").innerHTML = s.hhh; if (s.ddd == "true") { document.getElementById("Label1").style.color = "green"; } else { document.getElementById("Label1").style.color = "red"; document.getElementById("t1").innerHTML = s.password; document.getElementById("t2").innerHTML = s.nickname; document.getElementById("t3").innerHTML = s.sex; document.getElementById("t4").innerHTML = s.birthday; document.getElementById("t6").innerHTML = s.nation; document.getElementById("t7").innerHTML = s.class; document.getElementById("t5").innerHTML = s.age; } } }); } </script>
ashx中:
<%@ WebHandler Language="C#" Class="bb" %> using System; using System.Web; public class bb : IHttpHandler { public void ProcessRequest (HttpContext context) { string s = context.Request["sd"]; user u = new userdata().select(s); string end="{\"hhh\":\"用户名可用\",\"ddd\":\"true\"}"; if (u == null) { end = "{\"hhh\":\"用户名可用\",\"ddd\":\"true\"}"; } else { end = "{\"hhh\":\"用户名已被占用\",\"ddd\":\"false\",\"password\":\"" + u.password + "\",\"nickname\":\"" + u.nickname + "\",\"sex\":\"" +( u.sex?"男":"女") + "\",\"birthday\":\"" + u.birthday.ToString("yyyy年MM月dd日") + "\",\"nation\":\"" + u.nationname + "\",\"class\":\"" + u.classname + "\",\"age\":\""+u.age+"\"}"; } context.Response.Write(end); context.Response.End(); } public bool IsReusable { get { return false; } } }
例子二:展示多条数据,数据分页
aspx中:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <script src="js/jquery-1.7.2.min.js"></script> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> </head> <body> <form id="form1" runat="server"> <div> <table style="width:100%;text-align:center;background-color:navy"> <thead style="color:white;"> <tr> <td>用户名</td> <td>密码</td> <td>昵称</td> <td>性别</td> <td>生日</td> <td>年龄</td> <td>民族</td> <td>班级</td> </tr> </thead> <tbody id="tbody" style="background-color:white;"> </tbody> </table> 当前第<span id="sp">1</span> 页 <input type="button" value="上一页" id="btn1" /> <input type="button" value="下一页" id="btn2" /> </div> </form> </body> </html> <script> var pagecount = 3; var pagenumber = 1; load(pagecount, pagenumber); document.getElementById("btn1").onclick = function () { pagenumber--; load(pagecount, pagenumber); } document.getElementById("btn2").onclick = function () { pagenumber++; load(pagecount, pagenumber); } function load(count,number) { $.ajax({ url: "ajax/load.ashx", data: {"count":count,"number":number}, type:"post", dataType:"json", success: function (data) { document.getElementById("tbody").innerHTML = ""; for (i in data) { var end = "<tr>"; end += "<td>" + data[i].username + "</td>"; end += "<td>" + data[i].password + "</td>"; end += "<td>" + data[i].nickname + "</td>"; end += "<td>" + data[i].sex+ "</td>"; end += "<td>" + data[i].age + "</td>"; end += "<td>" + data[i].birthday + "</td>"; end += "<td>" + data[i].nation + "</td>"; end += "<td>" + data[i].class + "</td>"; end += "</tr>"; document.getElementById("tbody").innerHTML += end; } document.getElementById("sp").innerHTML = number; } }); }; </script>
ashx中:
<%@ WebHandler Language="C#" Class="load" %> using System; using System.Web; using System.Collections.Generic; using System.Collections; public class load : IHttpHandler { public void ProcessRequest (HttpContext context) { int c = Convert.ToInt32(context.Request["count"]); int n = Convert.ToInt32(context.Request["number"]); string json = "["; int count = 0; List<user> ulist = new userdata().select(c,n); foreach (user u in ulist) { if (count > 0) { json += ","; } json += "{\"username\":\""+u.username+"\",\"password\":\"" + u.password + "\",\"nickname\":\"" + u.nickname + "\",\"sex\":\"" +( u.sex?"男":"女") + "\",\"birthday\":\"" + u.birthday.ToString("yyyy年MM月dd日") + "\",\"nation\":\"" + u.nationname + "\",\"class\":\"" + u.classname + "\",\"age\":\""+u.age+"\"}"; count++; } json += "]"; context.Response.Write(json); context.Response.End(); } public bool IsReusable { get { return false; } } }
标签:datetime ashx file generic tar ber pass ext ade
原文地址:http://www.cnblogs.com/wy1992/p/6287975.html