ASP.NET MVC分页和排序功能实现
分页和排序,应该是软件开发中,需要必知必会的技能了,对于分页,网上很多教程,当然,别人终究是别人的,只有自己理解,会了,并且吸收之后,再用自己的语言,传授出来,这才是硬道理。好了,废话说多了。现在我们进入正题:
这里,我打算使用ef code-first方式分页控件就是用pagedlist.mvc,来做分页,对于排序,实现的思路是,加载数据出来之后,默认是升序排序,然后我们点击一下相应的列标题,就按照该字段降序排序,查数据。思路明确了,就开始干吧!
1.首先新建一个空白的mvc项目,在model文件夹里,新建一个student实体
student实体中的代码:
using system; using system.collections.generic; using system.linq; using system.web; namespace pagingandsortinginmvc.models { public class student { public int id { get; set; } public string name { get; set; } public string sex { get; set; } public string email { get; set; } public int age { get; set; } } }
2.添加ef引用之后,我们在根目录下,在创建一个文件夹map,在里面创建一个类studentmap
studentmap类的代码:
using pagingandsortinginmvc.models; using system; using system.collections.generic; using system.componentmodel.dataannotations.schema; using system.data.entity.modelconfiguration; using system.linq; using system.web; namespace pagingandsortinginmvc.map { public class studentmap:entitytypeconfiguration<student> { public studentmap() { //配置主键 this.haskey(s => s.id); //把id列设置为自增列 this.property(s => s.id).hasdatabasegeneratedoption(databasegeneratedoption.identity); //配置列 this.property(s => s.name).hasmaxlength(50).isrequired(); this.property(s => s.sex).hasmaxlength(2).isrequired(); this.property(s => s.age).isrequired(); this.property(s => s.email).hasmaxlength(100).isrequired(); } } }
3.在根目录下,再新建一个文件夹dbhelper,在里面新建一个类studentdbcontext
studentdbcontext类的代码:
using pagingandsortinginmvc.map; using system; using system.collections.generic; using system.data.entity; using system.linq; using system.web; namespace pagingandsortinginmvc.dbhelper { public class studentdbcontext:dbcontext { public studentdbcontext() : base("name=dbconnectionstring") { } protected override void onmodelcreating(dbmodelbuilder modelbuilder) { //因为这里只有一个实体,就不搞的那么复杂了,不用反射来做。直接添加单个实体的配置 modelbuilder.configurations.add(new studentmap()); base.onmodelcreating(modelbuilder); } } }
然后在配置文件中加上:
<connectionstrings> <add name="dbconnectionstring" connectionstring="server=.;database=mystudentdb;uid=sa;pwd=password_1" providername="system.data.sqlclient"/> </connectionstrings>
具体的位置在这:
4.好了,现在实体和数据库的配置都写好了,现在我们使用数据库迁移技术【migrations】来自动生成数据库,首先打开程序包管理控制台。
添加一行语句:enable-migrations,然后按回车键:
这个时候,就在我们程序中生成了一个文件夹migrations,里面有一个类configuration:
修改configuration类中的代码:把 automaticmigrationsenabled 设置为true;并添加一句代码,让迁移过程中,没有数据丢失:
automaticmigrationdatalossallowed = false;
然后在程序包管理控制台中接着输入:
update-database -verbose
注意: 【-verbose和database之间有空格】,之所以输入-verbose就是可以在控制台看到生成的sql语句:
pm> update-database -verbose using startup project 'pagingandsortinginmvc'. using nuget project 'pagingandsortinginmvc'. specify the '-verbose' flag to view the sql statements being applied to the target database. target database is: 'mystudentdb' (datasource: ., provider: system.data.sqlclient, origin: configuration). no pending explicit migrations. applying automatic migration: 201607180249098_automaticmigration. create table [dbo].[students] ( [id] [int] not null identity, [name] [nvarchar](50) not null, [sex] [nvarchar](2) not null, [email] [nvarchar](100) not null, [age] [int] not null, constraint [pk_dbo.students] primary key ([id]) ) create table [dbo].[__migrationhistory] ( [migrationid] [nvarchar](150) not null, [contextkey] [nvarchar](300) not null, [model] [varbinary](max) not null, [productversion] [nvarchar](32) not null, constraint [pk_dbo.__migrationhistory] primary key ([migrationid], [contextkey]) ) insert [dbo].[__migrationhistory]([migrationid], [contextkey], [model], [productversion]) values (n'201607180249098_automaticmigration', n'pagingandsortinginmvc.migrations.configuration', 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 , n'6.1.3-40302') running seed method. pm>
打开数据库,我们看到,就生成我们想要的数据库和表了:
既然要分页,就开始引入分页控件吧,引入pagedlist.mvc
5.新建一个空白模板的student控制器。
控制器里面就是我们主要的逻辑代码了:
using pagingandsortinginmvc.dbhelper; using system; using system.collections.generic; using system.linq; using system.web; using system.web.mvc; using pagedlist; using pagingandsortinginmvc.models; namespace pagingandsortinginmvc.controllers { public class studentcontroller : controller { private studentdbcontext db=null; public studentcontroller() { db = new studentdbcontext(); } /// <summary> /// 首页【查询分页数据】 /// </summary> /// <param name="sortby">根据什么排序</param> /// <param name="currentsort">当前排序字段</param> /// <param name="page">当前页</param> /// <returns></returns> public actionresult index(string sortby,string currentsort,int? page) { int pageindex = 1; int pagesize = 5; //判断page是否有值,有的话就给值,没有就赋值1 pageindex = page.hasvalue ? convert.toint32(page) : 1; viewbag.currentsort = sortby; //这句必须要,否则刚开始是空的,报错,就不能循环了。 sortby = string.isnullorempty(sortby) ? "name" : sortby; //如果sortby为空,就设置为name,下面设置的时候,默认按照名称排序 ipagedlist<student> lststudent = null; switch (sortby) { case "name": //如果sortby==currentsort,就按照对应字段降序排列,并分页。否则升序。 if (sortby.equals(currentsort)) { lststudent = db.set<student>(). orderbydescending(s => s.name). topagedlist(pageindex, pagesize); //根据一热心博友的建议,加上了这句,点击相应的列,升序降序循环。 viewbag.currentsort = null; } else { lststudent = db.set<student>(). orderby(s => s.name). topagedlist(pageindex, pagesize); } break; case "sex": //如果sortby==currentsort,就按照对应字段降序排列,并分页。否则升序。 if (sortby.equals(currentsort)) { lststudent = db.set<student>(). orderbydescending(s => s.sex). topagedlist(pageindex, pagesize); //根据一热心博友的建议,加上了这句,点击相应的列,升序降序循环。 viewbag.currentsort = null; } else { lststudent = db.set<student>(). orderby(s => s.sex). topagedlist(pageindex, pagesize); } break; case "email": //如果sortby==currentsort,就按照对应字段降序排列,并分页。否则升序。 if (sortby.equals(currentsort)) { lststudent = db.set<student>(). orderbydescending(s => s.email). topagedlist(pageindex, pagesize); //根据一热心博友的建议,加上了这句,点击相应的列,升序降序循环。 viewbag.currentsort = null; } else { lststudent = db.set<student>(). orderby(s => s.email). topagedlist(pageindex, pagesize); } break; case "age": //如果sortby==currentsort,就按照对应字段降序排列,并分页。否则升序。 if (sortby.equals(currentsort)) { lststudent = db.set<student>(). orderbydescending(s => s.age). topagedlist(pageindex, pagesize); //根据一热心博友的建议,加上了这句,点击相应的列,升序降序循环。 viewbag.currentsort = null; } else { lststudent = db.set<student>(). orderby(s => s.age). topagedlist(pageindex, pagesize); } break; default: //如果sortby==currentsort,就按照对应字段降序排列,并分页。否则升序。 if (sortby.equals(currentsort)) { lststudent = db.set<student>(). orderbydescending(s => s.name). topagedlist(pageindex, pagesize); //根据一热心博友的建议,加上了这句,点击相应的列,升序降序循环。 viewbag.currentsort = null; } else { lststudent = db.set<student>(). orderby(s => s.name). topagedlist(pageindex, pagesize); } break; } return view(lststudent); } public actionresult addstudent() { return view(); } [httppost] [validateantiforgerytoken] public actionresult addstudent(student model) { db.set<student>().add(model); db.savechanges(); return redirecttoaction("index"); } } }
创建相对应的index视图和addstudent视图:
index视图:
@using pagedlist.mvc;@*//引入分页的组件*@ @model pagedlist.ipagedlist<pagingandsortinginmvc.models.student> @{ viewbag.title = "index"; } <style> table { width: 100%; } table tr td { border: 2px solid black; text-align: center; word-wrap: break-word; } table tr:hover { background-color: #000; color: #fff; } table tr th { border: 2px solid black; text-align: center; background-color: #fff; color: #000; } </style> <h2>index</h2> <p> @html.actionlink("create new", "create") </p> @using(html.beginform("index","employee",formmethod.get)) { <table class="table"> <tr> <th> @* 通过创建匿名对象,传递参数到控制器中,new { sortby = "name", currentsort = viewbag.currentsort }*@ @*参数的大小写无所谓,只要和控制器名称一样就行,sortby,currentsort*@ @html.actionlink("name", "index", new { sortby = "name", currentsort = viewbag.currentsort }) </th> <th> @html.actionlink("sex", "index", new { sortby = "sex", currentsort = viewbag.currentsort }) </th> <th> @html.actionlink("email", "index", new { sortby = "email", currentsort = viewbag.currentsort }) </th> <th> @html.actionlink("age", "index", new {sortby = "age", currentsort = viewbag.currentsort }) </th> <th></th> </tr> @foreach (var item in model) { <tr> <td> @html.displayfor(modelitem => item.name) </td> <td> @html.displayfor(modelitem => item.sex) </td> <td> @html.displayfor(modelitem => item.email) </td> <td> @html.displayfor(modelitem => item.age) </td> <td> </td> </tr> } </table> } <div id="paging" style="text-align:center"> @*总页数是否小于当前页,小于就说明没数据,赋值0,否则赋值pagenumber*@ page @(model.pagecount< model.pagenumber?0:model.pagenumber) of @model.pagecount @html.pagedlistpager(model, page => url.action("index", new { page}),pagedlistrenderoptions.classic) </div>
addstudent视图:
@model pagingandsortinginmvc.models.student @{ viewbag.title = "addstudent"; } <h2>addstudent</h2> @using (html.beginform()) { @html.antiforgerytoken() <div class="form-horizontal"> <h4>student</h4> <hr /> @html.validationsummary(true, "", new { @class = "text-danger" }) <div class="form-group"> @html.labelfor(model => model.name, htmlattributes: new { @class = "control-label col-md-2" }) <div class="col-md-10"> @html.editorfor(model => model.name, new { htmlattributes = new { @class = "form-control" } }) @html.validationmessagefor(model => model.name, "", new { @class = "text-danger" }) </div> </div> <div class="form-group"> @html.labelfor(model => model.sex, htmlattributes: new { @class = "control-label col-md-2" }) <div class="col-md-10"> @html.editorfor(model => model.sex, new { htmlattributes = new { @class = "form-control" } }) @html.validationmessagefor(model => model.sex, "", new { @class = "text-danger" }) </div> </div> <div class="form-group"> @html.labelfor(model => model.email, htmlattributes: new { @class = "control-label col-md-2" }) <div class="col-md-10"> @html.editorfor(model => model.email, new { htmlattributes = new { @class = "form-control" } }) @html.validationmessagefor(model => model.email, "", new { @class = "text-danger" }) </div> </div> <div class="form-group"> @html.labelfor(model => model.age, htmlattributes: new { @class = "control-label col-md-2" }) <div class="col-md-10"> @html.editorfor(model => model.age, new { htmlattributes = new { @class = "form-control" } }) @html.validationmessagefor(model => model.age, "", new { @class = "text-danger" }) </div> </div> <div class="form-group"> <div class="col-md-offset-2 col-md-10"> <input type="submit" value="create" class="btn btn-default" /> </div> </div> </div> } <div> @html.actionlink("back to list", "index") </div> <script src="~/scripts/jquery-1.10.2.min.js"></script> <script src="~/scripts/jquery.validate.min.js"></script> <script src="~/scripts/jquery.validate.unobtrusive.min.js"></script>
接着修改一下布局页:
<!doctype html> <html> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>@viewbag.title - my asp.net application</title> <link href="~/content/site.css" rel="stylesheet" type="text/css" /> <link href="~/content/bootstrap.min.css" rel="stylesheet" type="text/css" /> <script src="~/scripts/modernizr-2.6.2.js"></script> </head> <body> <div class="navbar navbar-inverse navbar-fixed-top"> <div class="container"> <div class="navbar-header"> <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse"> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> @html.actionlink("application name", "index", "home", new { area = "" }, new { @class = "navbar-brand" }) </div> <div class="navbar-collapse collapse"> <ul class="nav navbar-nav"> @html.actionlink("student list","index") @html.actionlink("add student ", "addstudent") </ul> </div> </div> </div> <div class="container body-content"> @renderbody() <hr /> <footer> <p>© @datetime.now.year - my asp.net application</p> </footer> </div> <script src="~/scripts/jquery-1.10.2.min.js"></script> <script src="~/scripts/bootstrap.min.js"></script> </body> </html>
修改一下默认路由:
using system; using system.collections.generic; using system.linq; using system.web; using system.web.mvc; using system.web.routing; namespace pagingandsortinginmvc { public class routeconfig { public static void registerroutes(routecollection routes) { routes.ignoreroute("{resource}.axd/{*pathinfo}"); routes.maproute( name: "default", url: "{controller}/{action}/{id}", defaults: new { controller = "student", action = "index", id = urlparameter.optional } ); } } }
运行项目:
刚开始没有任何数据,我们添加几条测试数据:
我们来验证一下,结果:
看到了么,点击相应的列标题就可以进行排序了。分页也实现了。当然分页的样式可以通过改变这个选项:
@html.pagedlistpager(model, page => url.action("index", new { page}),pagedlistrenderoptions.classic)
这里,我修改了一下
@html.pagedlistpager(model, page => url.action("index", new { page}),pagedlistrenderoptions.twitterbootstrappager)
分页控件的效果就是这样了。
好了,这篇文章到此结束。
总结:分页和排序是很重要的功能,需要熟练掌握。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
推荐阅读
-
ASP.NET MVC分页和排序功能实现
-
Spring MVC+MyBatis+MySQL实现分页功能实例
-
ASP.NET MVC 主要的四种过滤器和三种具体实现类
-
MVC默认路由实现分页(PagerExtend.dll下载)
-
ASP.NET MVC图片上传前预览简单实现
-
asp.net mvc实现简单的实时消息推送
-
ASP.NET MVC5网站开发之实现数据存储层功能(三)
-
ASP.NET MVC+EF在服务端分页使用jqGrid以及jquery Datatables的注意事项
-
ASP.NET MVC5网站开发之登录、验证和注销管理员篇1(六)
-
ASP.NET MVC5网站开发之用户资料的修改和删除3(七)