数据类代码：
复制代码 代码如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Collections;
using System.Reflection;
namespace DAL
{
public class UserManageClass
{
/// <summary>
/// 取得总页数
/// </summary>
/// <returns>总页数</returns>
public int GetPageCount()
{
int counts;
string SqlStr = "select count(0) from [User]";
counts = new SQLHelper().Content(SqlStr, CommandType.Text);
return counts;
}
/// <summary>
/// 取出每一页的内容
/// </summary>
/// <param name="SatrPage">开始页数</param>
/// <param name="EndPage">结束页数</param>
/// <returns>每一页的内容</returns>
public DataTable GetPageDate(string SatrPage, string EndPage)
{
DataTable dt;
string SqlStr = @"select * from
(select *, ROW_NUMBER() over(order by id)as no_ from [User])aa
where aa.no_ between '"+SatrPage+"' and '"+EndPage+"'";
dt = new SQLHelper().ExecuteQuery(SqlStr, CommandType.Text);
return dt;
}
/// <summary>
/// 将一个DataTable转换成列表
/// </summary>
/// <typeparam name="T">实体对象的类型</typeparam>
/// <param name="dt">要转换的DataTable</param>
/// <returns></returns>
public List<T> DataTableToEntityList<T>(DataTable dt)
{
List<T> entiyList = new List<T>();
Type entityType = typeof(T);
PropertyInfo[] entityProperties = entityType.GetProperties();
foreach (DataRow row in dt.Rows)
{
T entity = Activator.CreateInstance<T>();
foreach (PropertyInfo propInfo in entityProperties)
{
if (dt.Columns.Contains(propInfo.Name))
{
if (!row.IsNull(propInfo.Name))
{
propInfo.SetValue(entity, row[propInfo.Name], null);
}
}
}
entiyList.Add(entity);
}
return entiyList;
}
}
}
PageService.ashx.cs一般处理程序代码：
复制代码 代码如下:
using System;
using System.Collections;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Xml.Linq;
using System.Data.SqlClient;
using DAL;
using System.Web.Extensions;
using System.Web.Script.Serialization;
using Model;
using System.Web.UI.MobileControls;
using System.Collections.Generic;
namespace LandingSystem
{
/// <summary>
/// $codebehindclassname$ 的摘要说明
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class PageService : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
string action = context.Request["action"];
if (action == "GetPageCount")
{
int counts = new UserManageClass().GetPageCount();
int page = counts / 3;
if (counts % 3 != 0)
{
page++;
}
context.Response.Write(page);
}
else if (action == "GetPageData")
{
int pageNo = Convert.ToInt32(context.Request["PageNo"]);
string SatrPage = ((pageNo - 1) * 3 + 1).ToString();
string EndPage = (pageNo * 3).ToString();
DataTable dt= new UserManageClass().GetPageDate(SatrPage, EndPage);
IList<RegisterModel> data = ModelConvertHelper<RegisterModel>.ConvertToModel(dt);
// IList<RegisterModel> data = new UserManageClass().DataTableToEntityList<RegisterModel>(dt);
var p1 = data.Select(c => new { c.Name,c.Phone});
#region 废物代码
// var p1 = data.Select( c => new { c.Name,c.Phone});
//var p1=data.Select(dr=>new {dr["Name"].ToString(),dr["Phone"].ToString()});
//var T_model = new List<RegisterModel>();
//var p3 = T_model.Select(c => new { c.Name, c.Phone });
//var p2=data.Select(c=>new {})
#endregion
JavaScriptSerializer jss = new JavaScriptSerializer();
context.Response.Write(jss.Serialize(p1));
}
}
public bool IsReusable
{
get
{
return false;
}
}
}
}
aspx页面代码：
复制代码 代码如下:
<head runat="server">
<title>无标题页</title>
<script src="/UploadFiles/2021-04-02/jquery-latest.js"> <script type="text/javascript">
$(function(){
//-----------------------------------------------------------
function getPageData(pageNo){ //取得某页数据的方法
$.post("PageService.ashx",{"action":"GetPageData","PageNo":pageNo},function(data,status){
if(status=="success"){
$("#Comment").empty();
var comments=$.parseJSON(data); //反序列化json数据。
for(var i=0;i<comments.length;i++){
var row=comments[i];
var li= $("<li>"+row.Name+" : "+row.Phone+"</li>");
$("#Comment").append(li); //每取出一条数据就创建一个li并append到Comment/ul内。
}
}
});
}
//-------------------------------------------------------------------
getPageData(1); //首次进入页面，看到的是第一页的数据
//----------------------------------------------------------------/
//取得所有的页数并且初始化分页按钮
$.post("PageService.ashx",{"action":"GetPageCount"},function(data,status){
if(status=="success"){
var tr1=$("<tr></tr>");
var pageNo=parseInt(data);
for(var i=1;i<=pageNo;i++){
var td=$("<td><a href=''>"+i+"</a></td>");
tr1.append(td);
}
$("#pageNo").append(tr1);
$("#pageNo a").click(function(e){ //页码创建后，就为每一个页码监听一个click事件。
e.preventDefault(); //取消a的默认跳转行为
getPageData($(this).html()); //点击后就去执行取页数据的操作。
});
}
});
//----------------------------------------------------------------------------
});
</script>
</head>
<body>
<table>
<tr>
<td>
<ul id="Comment"></ul>
</td>
</tr>
</table>
<br />
页数：
<table id="pageNo"></table>
</body>
</html>
ModelConvertHelper.cs（将datatable转换为list通用类）代码：
复制代码 代码如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
using System.Data;
using System.Reflection;
namespace DAL
{
public class ModelConvertHelper<T> where T : new ()
{
public static IList<T> ConvertToModel(DataTable dt)
{
IList<T> ts = new List<T>();
Type type=typeof(T);
string tempName = "";
foreach (DataRow dr in dt.Rows)
{
T t = new T();
// 获得此模型的公共属性
PropertyInfo[] propertys = t.GetType().GetProperties();
foreach (PropertyInfo pi in propertys)
{
tempName = pi.Name;
// 检查DataTable是否包含此列
if (dt.Columns.Contains(tempName))
{
// 判断此属性是否有Setter
if (!pi.CanRead) continue;
object value = dr[tempName];
if (value != DBNull.Value)
if (pi.PropertyType == typeof(int))
{
pi.SetValue(t, Convert.ToInt32(value), null);
}
else if (pi.PropertyType == typeof(string))
{
pi.SetValue(t, value.ToString(), null);
}
//pi.SetValue(t, value, null);
}
}
ts.Add(t);
}
return ts;
}
}
}
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