当前位置: 首页 > 图文教程 > 网络编程 > ASP.NET > asp.net下 jquery jason 高效传输数据

ASP.NET
asp.net Execl的添加,更新操作实现代码
asp.net 生成曲线图实现代码
从外部的js文件中获取ASPX页面的控件ClientID
asp.net 因为数据库正在使用的解决方法
asp.net Repeater 自递增
asp.net 实现防迅雷等下载工具盗链
ASP.NET封装的SQL数据库访问类
asp.net 通过指定IP地址得到当前的网络上的主机的域名
aspx 服务器架设问题解决
ASP.NET Session使用详解
Asp.net 5种页面转向方法
ASP.NET 用户多次登录的解决方法
ASP.NET下母版页和内容页中的事件发生顺序整理
asp.net 程序性能优化的七个方面 (c#（或vb.net）程序改进)
从客户端检测到有潜在危险的Request.Form值的asp.net代码
asp.net CommunityServer中的wwwStatus
在应用程序级别之外使用注册为allowDefinition=''MachineToApplication''的节是错误的
.net开发人员常犯的错误分析小结
ASP.net Substitution 页面缓存而部分不缓存的实现方法
asp.net 生成静态时的过滤viewstate的实现方法

No. « 55 56 57 58 »

技术文章搜索

关键字

ASP.NET 中的 asp.net下 jquery jason 高效传输数据

出处:互联网   整理: 软晨网（RuanChen.com）   发布: 2009-10-11   浏览: 178 ::
收藏到网摘: n/a

jquery jason 高效传输数据转自网上稍有修改 Default.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>test2</title>
<script src="/upload/tech/20091011/20091011144047_fae0b27c451c728867a567e8c1bb4e53.js" type="text/javascript"></script>
<script src="/upload/tech/20091011/20091011144048_443cb001c138b2561a0d90720d6ce111.js" type="text/javascript"></script>
<script src="/upload/tech/20091011/20091011144049_d81f9c1be2e08964bf9f24b15f0e4900.js" type="text/javascript"></script>
</head>
<body>
<div>
<div>
<br />
<input id="first" type="button" value=" << " /><input id="previous" type="button"
value=" < " /><input id="next" type="button" value=" > " /><input id="last" type="button"
value=" >> " />
<span id="pageinfo"></span>
<ul id="datas">
<li id="template">
<span id="OrderID">
订单ID
</span>/
<span id="CustomerID">
客户ID
</span>
<span id="EmployeeID">
雇员ID
</span>/
<span id="OrderDate">
订购日期
</span>/
<span id="ShippedDate">
发货日期
</span>/
<span id="ShippedName">
货主名称
</span>/
<span id="ShippedAddress">
货主地址
</span>/
<span id="ShippedCity">
货主城市
</span>/
<span id="more">
更多信息
</span>
</li>
</ul>
</div>
<div id="load" style="left: 0px; position: absolute; top: 0px; background-color: red">
LOADING....
</div>
<input type="hidden" id="pagecount" />
</div>
</body>
</html>
Handler.ashx
<%@ WebHandler Language="C#" Class="jQueryJSON.Handler" %>
using System;
using System.Data;
using System.Web;
using System.Collections;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Configuration;
using System.Data.SqlClient;
using System.Text;
using System.Xml;
using NetServ.Net.Json;
namespace jQueryJSON
{
/// <summary>
/// $codebehindclassname$ 的摘要说明
/// </summary>
[WebService(Namespace = "http://tempuri.org/json/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Handler : IHttpHandler
{
string dbfile = ConfigurationManager.AppSettings["conn"].ToString();
readonly int PageSize = int.Parse(ConfigurationManager.AppSettings["PageSize"]);
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
//不让浏览器缓存
context.Response.Buffer = true;
context.Response.ExpiresAbsolute = DateTime.Now.AddDays(-1);
context.Response.AddHeader("pragma", "no-cache");
context.Response.AddHeader("cache-control", "");
context.Response.CacheControl = "no-cache";
string result = "";
if (context.Request.Params["getPageCount"] != null) result = GetPageCount();
if (context.Request.Params["pageIndex"] != null)
{
string pageindex = context.Request.Params["pageIndex"];
//if (context.Cache.Get(pageindex) != null)
// result = context.Cache.Get(pageindex).ToString();
//else
//{
// result = GetPageData(context.Request.Params["pageIndex"]);
// context.Cache.Add(
// pageindex,
// result,
// null,
// DateTime.Now.AddMinutes(1),
// System.Web.Caching.Cache.NoSlidingExpiration,
// System.Web.Caching.CacheItemPriority.Default,
// null);
//}
result = GetPageData(context.Request.Params["pageIndex"]);
}
context.Response.Write(result);
}
private string GetPageData(string p)
{
int PageIndex = int.Parse(p);
string sql;
if (PageIndex == 1)
sql = "select top " + PageSize.ToString() + " * from Orders order by OrderID desc";
else
sql = "select top " + PageSize.ToString() + " * from Orders where OrderID not in(select top " + ((PageIndex - 1) * PageSize).ToString() + " OrderID from Orders order by OrderID desc) order by OrderID desc";
SqlConnection conn = new SqlConnection(dbfile);
SqlDataAdapter da = new SqlDataAdapter(sql, conn);
DataTable dt = new DataTable("table");
da.Fill(dt);
return DataTableJson(dt);
}
private string GetPageCount()
{
SqlConnection conn = new SqlConnection(dbfile);
SqlCommand cmd = new SqlCommand("select count(*) from Orders", conn);
conn.Open();
int rowcount = Convert.ToInt32(cmd.ExecuteScalar());
conn.Close();
return ((rowcount + PageSize - 1) / PageSize).ToString();
}
private string DataTable2Json(DataTable dt)
{
StringBuilder jsonBuilder = new StringBuilder();
jsonBuilder.Append("{\"");
jsonBuilder.Append(dt.TableName);
jsonBuilder.Append("\":[");
for (int i = 0; i < dt.Rows.Count; i++)
{
jsonBuilder.Append("{");
for (int j = 0; j < dt.Columns.Count; j++)
{
jsonBuilder.Append("\"");
jsonBuilder.Append(dt.Columns[j].ColumnName);
jsonBuilder.Append("\":\"");
jsonBuilder.Append(dt.Rows[i][j].ToString());
jsonBuilder.Append("\",");
}
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
jsonBuilder.Append("},");
}
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
jsonBuilder.Append("]");
jsonBuilder.Append("}");
return jsonBuilder.ToString();
}
private string DataTableJson(DataTable dt)
{
JsonWriter writer = new JsonWriter();
JsonObject content = new JsonObject();
JsonArray Orders = new JsonArray();
JsonObject Order;
JsonObject OrderItem = new JsonObject();
for (int i = 0; i < dt.Rows.Count; i++)
{
Order = new JsonObject();
for(int j =0;j<dt.Columns.Count;j++)
{
Order.Add(dt.Columns[j].ColumnName, dt.Rows[i][j].ToString());
}
Orders.Add(Order);
}
content.Add(dt.TableName, Orders);
content.Write(writer);
writer = new IndentedJsonWriter();
content.Write(writer);
return writer.ToString();
}
public bool IsReusable
{
get
{
return false;
}
}
}
}
ajaxfn.js
//AJAX方法取得数据并显示到页面上
function bind()
{
$("[@id=ready]").remove();
$("#load").show();
$.ajax({
type: "get",//使用get方法访问后台
dataType: "json",//返回json格式的数据
url: "Handler.ashx",//要访问的后台地址
data: "pageIndex=" + pageIndex,//要发送的数据
complete :function(){$("#load").hide();},//AJAX请求完成时隐藏loading提示
success: function(msg){//msg为返回的数据，在这里做数据绑定
var data = msg.table;
$.each(data, function(i, n){
var row = $("#template").clone();
row.find("#OrderID").text(n.OrderID);
row.find("#CustomerID").text(n.CustomerID);
row.find("#EmployeeID").text(n.EmployeeID);
row.find("#OrderDate").text(ChangeDate(n.OrderDate));
if(n.RequiredDate !== undefined) row.find("#ShippedDate").text(ChangeDate(n.RequiredDate));
row.find("#ShippedName").text(n.ShipName);
row.find("#ShippedAddress").text(n.ShipAddress);
row.find("#ShippedCity").text(n.ShipCity);
row.find("#more").html("<a href=OrderInfo.aspx?id=" + n.OrderID + "&pageindex="+pageIndex+"> More</a>");
row.attr("id","ready");//改变绑定好数据的行的id
row.appendTo("#datas");//添加到模板的容器中
});
$("[@id=ready]").show();
SetPageInfo();
}
});
}
function ChangeDate(date)
{
return date.replace("-","/").replace("-","/");
}
//设置第几页/共几页的信息
function SetPageInfo()
{
$("#pageinfo").html(pageIndex + "/" + pageCount);
}
//AJAX方法取得分页总数
function GetPageCount()
{
$.ajax({
type: "get",
dataType: "text",
url: "Handler.ashx",
data: "getPageCount=1",
async: false,
success: function(msg){
$("#pagecount").val(msg);
}
});
}
//改变翻页按钮状态
function ChangeState(state1,state2)
{
if(state1 == 1)
{
document.getElementById("first").disabled = "";
document.getElementById("previous").disabled = "";
}
else if(state1 == 0)
{
document.getElementById("first").disabled = "disabled";
document.getElementById("previous").disabled = "disabled";
}
if(state2 == 1)
{
document.getElementById("next").disabled = "";
document.getElementById("last").disabled = "";
}
else if(state2 == 0)
{
document.getElementById("next").disabled = "disabled";
document.getElementById("last").disabled = "disabled";
}
}
Gonneng.js
var pageIndex = 1
var pageCount = 0;
$(function(){
GetPageCount();//取得分页总数
pageCount = parseInt($("#pagecount").val());//分页总数放到变量pageCount里
$("#load").hide();//隐藏loading提示
$("#template").hide();//隐藏模板
ChangeState(0,1);//设置翻页按钮的初始状态
bind();//绑定第一页的数据
//第一页按钮click事件
$("#first").click(function(){
pageIndex = 1;
ChangeState(0,1);
bind();
});
//上一页按钮click事件
$("#previous").click(function(){
pageIndex -= 1;
ChangeState(-1,1);
if(pageIndex <= 1)
{
pageIndex = 1;
ChangeState(0,-1);
}
bind();
});
//下一页按钮click事件
$("#next").click(function(){
pageIndex += 1;
ChangeState(1,-1);
if(pageIndex>=pageCount)
{
pageIndex = pageCount;
ChangeState(-1,0);
}
bind(pageIndex);
});
//最后一页按钮click事件
$("#last").click(function(){
pageIndex = pageCount;
ChangeState(1,0);
bind(pageIndex);
});
});
还需要jquery-1.2.6.js 网上很多
web.config 中添加
<appSettings>
<add key="conn" value="Server=.;database=Northwind;uid=sa;pwd=sa"/>
<add key="PageSize" value="10"/>
</appSettings>