asp.net学习笔记之分页设计介绍
asp.net的分页设计是什么?怎么使用?针对这几个问题,今天小编总结这篇分页设计的文章,希望帮助更多想学习分页设计的同学找到更加简单易行的办法。
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1: // //记录日志
2: private static readonly log4net.ILog logger = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod()。DeclaringType);
3: //输出的PagerHtml代码
4: public string PagerHtml = "";
5: protected void Page_Load(object sender, EventArgs e)
6: {
7: try
8: {
9: string TypeId = Request["TypeId"];
10: //查询条件
11: string strCondition = "";
12: //字符串注入检测
13: if (!string.IsNullOrEmpty(TypeId) && Tools.IsValidInput(ref TypeId, true))
14: strCondition = "TypeId=" + TypeId;
15:
16: //分页实现
17: var pager = new Common.RupengPager();
18: pager.UrlFormat = "NewsList.aspx?pagenum={n}&TypeId=" + TypeId;
19: pager.PageSize = 30;
20: pager.TryParseCurrentPageIndex(Request["pagenum"]);
21:
22: //分页数据读取
23: newsBLL bll = new newsBLL();
24: DataTable dt = bll.ListByPaginationForView("Time", pager.PageSize, pager.CurrentPageIndex, "1", strCondition);
25:
26: //获取总页数
27: pager.TotalCount = bll.GetVNewsListCount(strCondition);
28: rpData.DataSource = dt;
29: rpData.DataBind();
30:
31: //渲染页码条HTML
32: PagerHtml = pager.Render();
33: }
34: catch (Exception ex)
35: {
36: logger.Error("错误:", ex);
37: }
38: }
效果也就是这样:
前台就是
1: <%@ Page Language="C#" MasterPageFile="~/InfoPage.master" AutoEventWireup="true" CodeFile="NewsList.aspx.cs" Inherits="News_NewsList" Title="新闻列表" %>
2:
3:
4:
5:
6:
7:
8: <%--GetNewsTypeInfoForNewsByJson--%>
9:
10:
11: 新闻列表
当前位置:首页 > 新闻列表
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
这样仍然有一些问题:
为什么一定要后台处理呢?
为什么后台要做这些显示相关的?
后台只负责提供数据,而界面实现,完全应该由js解决……
因此,就有了现在这个版本…
上网研究了一下Jquery pager,然后在他的基础上,该改改,然后就有了现在这个版本,后台只负责提供数据(json格式)
前台负责界面显示
js分页:
1: //Download by
2: //每次只显示5个页码
3: //修改:2012/4/26
4: //tianzhuanghu
5: //http://www.cnblogs.com/mysweet/ 我的博客
6: (function($) {
7: //设定页码方法,初始化
8: $.fn.setPager = function(options) {
9: var opts = $.extend({}, pagerDefaults, options);
10: return this.each(function() {
11: //修改,能够动态设置PageSize
12: pagerDefaults.PageSize=options.PageSize;
13: $(this)。empty()。append(setPagerHtml(parseInt(options.RecordCount), parseInt(options.PageIndex), options.buttonClick));
14: $('.pager a')。mouseover(function() { document.body.style.cursor = "pointer"; })。mouseout(function() { document.body.style.cursor = "auto"; });
15: });
16: };
17: //设定页数及html
18: function setPagerHtml(RecordCount, PageIndex, pagerClick) {
19:
20: var $content = $("
21: var startPageIndex = 1;
22: //若页码超出
23: if (RecordCount <= 0) RecordCount = pagerDefaults.PageSize;
24: var PageSize=pagerDefaults.PageSize;
25: //alert(pagerDefaults.PageSize);
26: //末页
27: var endPageIndex = parseInt(RecordCount % parseInt(PageSize)) > 0 ? parseInt(RecordCount / parseInt(PageSize)) + 1 : RecordCount / parseInt(PageSize);
28:
29: if (PageIndex > endPageIndex) PageIndex = endPageIndex;
30: if (PageIndex <= 0) PageIndex = startPageIndex;
31: var nextPageIndex = PageIndex + 1;
32: var prevPageIndex = PageIndex - 1;
33: if (PageIndex == startPageIndex) {
34: $content.append($("首页"));
35: $content.append($("上一页"));
36: } else {
37:
38: $content.append(renderButton(RecordCount, 1, pagerClick, "首页"));
39: $content.append(renderButton(RecordCount, prevPageIndex, pagerClick, "上一页"));
40: }
41: //这里判断是否显示页码
42: if (pagerDefaults.ShowPageNumber) {
43: // var html = "";
44: //页码部分隐藏 只显示中间区域
45: if (endPageIndex <= 5 && PageIndex <= 5) {
46: for (var i = 1; i <= endPageIndex; i++) {
47: if (i == PageIndex) {
48: $content.append($("" + i + ""));
49: } else {
50: $content.append(renderButton(RecordCount, i, pagerClick, i));
51: }
52:
53: }
54:
55: } else if (endPageIndex > 5 && endPageIndex - PageIndex <= 2) {
56:
57: $content.append($("…"));
58: for (var i = endPageIndex - 4; i <= endPageIndex; i++) {
59: if (i == PageIndex) {
60: $content.append($("" + i + ""));
61: } else {
62: $content.append(renderButton(RecordCount, i, pagerClick, i));
63: }
64:
65: }
66: } else if (endPageIndex > 5 && PageIndex > 3) {
67:
68: $content.append($("…"));
69: for (var i = PageIndex - 2; i <= PageIndex + 2; i++) {
70: if (i == PageIndex) {
71: $content.append($("" + i + ""));
72: } else {
73: $content.append(renderButton(RecordCount, i, pagerClick, i));
74: }
75:
76: }
77: $content.append($("…"));
78:
79: } else if (endPageIndex > 5 && PageIndex <= 3) {
80:
81: for (var i = 1; i <= 5; i++) {
82: if (i == PageIndex) {
83: $content.append($("" + i + ""));
84: } else {
85: $content.append(renderButton(RecordCount, i, pagerClick, i));
86: }
87:
88: }
89: $content.append($("…"));
90: }
91: }
92: if (PageIndex == endPageIndex) {
93: $content.append($("下一页"));
94: $content.append($("末页"));
95: } else {
96: $content.append(renderButton(RecordCount, nextPageIndex, pagerClick, "下一页"));
97: $content.append(renderButton(RecordCount, endPageIndex, pagerClick, "末页"));
98: }
99:
100:
101: return $content;
102: }
103: function renderButton(recordCount, goPageIndex, EventHander, text) {
104: var $goto = $("" + text + "\"");
105: $goto.click(function() {
106:
107: EventHander(recordCount, goPageIndex,pagerDefaults.PageSize);
108: });
109: return $goto;
110: }
111: var pagerDefaults = {
112: DefaultPageCount: 1,
113: DefaultPageIndex: 1,
114: PageSize:20,
115: ShowPageNumber: true //是否显示页码
116: };
117: })(jQuery);
前台页面显示:
1: <%@ Page Language="C#" MasterPageFile="~/InfoPage.master" AutoEventWireup="true"
2: CodeFile="MasterList.aspx.cs" Inherits="Master_MasterList" Title="大师风采" %>
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
49:
50:
51:
52:
53:
58:
59:
63: 大师名称 64: | 66: 大师简介 67: | 69: 大师个人网页 70: |
---|
77:
78:
79:
80:
81:
后台则负责数据的提供:
1: ///
2: /// 搜索调用
3: ///
4: ///
5: public void SearchMaster(HttpContext context)
6: {
7: //查询条件
8: string key = context.Request["key"];
9: //分页
10: int pageIndex = Convert.ToInt32(context.Request["pageIndex"]);
11: int pageSize = Convert.ToInt32(context.Request["pageSize"]);
12: //字段排序
13: String sortField = context.Request["sortField"];
14: String sortOrder = context.Request["sortOrder"];
15: string strCondition = "";
16: //对搜索内容进行验证
17: if (!Common.Tools.IsValidInput(ref key, false))
18: {
19: return;
20: }
21: else
22: strCondition = masterBLL.ConfirmCondition(key);//判断查询条件
23: masterBLL bll = new masterBLL();
24: //分页数据读取
25: IEnumerable
26: //获取总页数
27: int totalPage = bll.GetCount(strCondition);
28: //JSON 序列化
29: string json = masterBLL.MiniUiListToJson(list, totalPage, "");
30:
31:
32: context.Response.Write(json);
33: }
BLL生成json方法:(这个方法我是代码生成器写成一个模板,然后每次自动生成,免得每次都要写,哈哈哈)
1: ///
2: /// 专门生成为MiniUi生成json数据(List->json)
3: ///
4: ///
5: /// 实现了Ilist接口的list
6: /// 记录总数
7: /// 这里放排序的参数例如,string para=""maxAge":37,"avgAge":27,"minAge":24"
8: ///
9: public static string MiniUiListToJson(IEnumerable
10: {
11: StringBuilder Json = new StringBuilder();
12: Json.Append("{\"total\":"+total+",\"data\":");
13: Json.Append("[");
14: foreach (master Info in masterInfo)
15: {
16: Json.Append("{");
17: Json.Append("\"Id\":\"" + Info.Id + "\"");
18: Json.Append(",");
19: Json.Append("\"Username\":\"" + Info.Username + "\"");
20: Json.Append(",");
21: Json.Append("\"Password\":\"" + Info.Password + "\"");
22: Json.Append(",");
23: Json.Append("\"Name\":\"" + Info.Name + "\"");
24: Json.Append(",");
25: Json.Append("\"Introduction\":\"" + Info.Introduction + "\"");
26: Json.Append(",");
27: Json.Append("\"Isrecommend\":\"" + Info.Isrecommend + "\"");
28: Json.Append(",");
29: Json.Append("\"Isshow\":\"" + Info.Isshow + "\"");
30: Json.Append(",");
31: Json.Append("\"Picturepath\":\"" + Info.Picturepath + "\"");
32: Json.Append(",");
33: Json.Append("\"Sex\":\"" + Info.Sex + "\"");
34: Json.Append(",");
35: Json.Append("\"Nation\":\"" + Info.Nation + "\"");
36: Json.Append(",");
37: Json.Append("\"mobilephone\":\"" + Info.mobilephone + "\"");
38: Json.Append(",");
39: Json.Append("\"Telephone\":\"" + Info.Telephone + "\"");
40: Json.Append(",");
41: Json.Append("\"Email\":\"" + Info.Email + "\"");
42: Json.Append(",");
43: Json.Append("\"QQ\":\"" + Info.QQ + "\"");
44: Json.Append(",");
45: Json.Append("\"Zipcode\":\"" + Info.Zipcode + "\"");
46: Json.Append(",");
47: Json.Append("\"Address\":\"" + Info.Address + "\"");
48: Json.Append(",");
49: Json.Append("\"appreciation\":\"" + Info.appreciation + "\"");
50: Json.Append(",");
51: Json.Append("\"website\":\"" + Info.website + "\"");
52: Json.Append(",");
53: Json.Append("\"Reward\":\"" + Info.Reward + "\"");
54: Json.Append(",");
55: Json.Append("\"BirthDay\":\"" + Info.BirthDay + "\"");
56: Json.Append(",");
57: Json.Append("\"state\":\"" + Info.state + "\"");
58: Json.Append(",");
59: Json.Append("\"state1\":\"" + Info.state1 + "\"");
60: Json.Append(",");
61: Json.Append("\"hit\":\"" + Info.hit + "\"");
62: Json.Append(",");
63: Json.Append("\"rank\":\"" + Info.rank + "\"");
64: Json.Append("}");
65: if(Info != masterInfo.Last())
66: {
67: Json.Append(",");
68: }
69: }
70: Json.Append("]}");
71: return Json.ToString();
72: }
存储过程:一直就用的上网找的,一个非常完美的存储过程:(感觉优化的很好,我做了多次封装,用起来非常方便):
1: USE [czcraft]
2: GO
3: /****** 对象: StoredProcedure [dbo].[pagination] 脚本日期: 04/26/2012 21:04:21 ******/
4: SET ANSI_NULLS ON
5: GO
6: SET QUOTED_IDENTIFIER ON
7: GO
8: CREATE PROCEDURE [dbo].[pagination]
9: @tblName varchar(255), -- 表名
10: @innerJohn varchar(500), --inner john连接的表
11: -- @innerJohnCondition varchar(255), --inner john连接条件
12: @strGetFields varchar(1000) = '*', -- 需要返回的列
13: @fldName varchar(255)='', -- 排序的字段名
14: @PageSize int = 10, -- 页尺寸
15: @PageIndex int = 1, -- 页码
16: @doCount bit = 0, -- 返回记录总数, 非0 值则返回
17: @OrderType bit = 0, -- 设置排序类型, 非0 值则降序
18: @strWhere varchar(1500) = '' -- 查询条件(注意: 不要加where)
19: AS
20:
21: declare @strSQL varchar(5000) -- 主语句
22: declare @strTmp varchar(110) -- 临时变量
23: declare @strOrder varchar(400) -- 排序类型
24:
25: if @doCount != 0
26: begin
27: if @strWhere !=''
28: set @strSQL = 'select count(*) as Total from [' + @tblName + '] '+@innerJohn +' where '+@strWhere
29: else
30: set @strSQL = 'select count(*) as Total from [' + @tblName + '] '+@innerJohn +' '
31: end
32: --以上代码的意思是如果@doCount传递过来的不是0,就执行总数统计。以下的所有代码都是@doCount为0的情况
33:
34: else
35: begin
36: if @OrderType != 0
37: begin
38: set @strTmp = '<(select min'
39: set @strOrder = ' order by [' + @fldName +'] desc'
40: --如果@OrderType不是0,就执行降序,这句很重要!
41: end
42:
43: else
44: begin
45: set @strTmp = '>(select max'
46: set @strOrder = ' order by [' + @fldName +'] asc'
47: end
48: if @PageIndex = 1
49: begin
50: if @strWhere != ''
51: set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from [' + @tblName + '] '+@innerJohn +' where ' + @strWhere + ' ' + @strOrder
52: else
53: set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from ['+ @tblName + '] '+@innerJohn + @strOrder
54: --如果是第一页就执行以上代码,这样会加快执行速度
55: end
56: else
57: begin
58: --以下代码赋予了@strSQL以真正执行的SQL代码
59: set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from '
60: + @tblName + ' '+@innerJohn+ ' where [' + @fldName + ']' + @strTmp + '(['+ @fldName + ']) from (select top ' + str((@PageIndex-1)*@PageSize) + ' ['+ @fldName + '] from [' + @tblName + '] '+@innerJohn +' ' + @strOrder + ') as tblTmp)'+ @strOrder
61: if @strWhere != ''
62: set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from '
63: + @tblName + ' '+@innerJohn+ ' where [' + @fldName + ']' + @strTmp + '(['
64: + @fldName + ']) from (select top ' + str((@PageIndex-1)*@PageSize) + ' ['
65: + @fldName + '] from [' + @tblName + '] '+@innerJohn +' where ' + @strWhere + ' '
66: + @strOrder + ') as tblTmp) and ' + @strWhere + ' ' + @strOrder
67: end
68: end
69:
70: print(@PageIndex)
71:
72: exec (@strSQL)
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