Asp.Net MVC 分页、检索、排序整体实现
很多时候需要这样的功能，对表格进行分页、排序和检索。这个有很多实现的方式，有现成的表格控件、用前端的mvvm，用户控件。但很多时候看着很漂亮的东西你想进一步控制的时候却不那么如意。这里自己实现一次，功能不是高大全，但求一个清楚明白，也欢迎园友拍砖。前端是bootstrap3+jPaginate，后台基于membership。没什么难点。
先上效果图。
分页其实就是处理好 每页项目数、总项目数、总页数、当前页。为了方便复用，就先从仓库开始说起。
一、建立仓库
1.定义Ipager接口，需要分页的模型仓库继承这个接口
namespace Protal.Model.Abstract { /// <summary> /// 分页处理 /// </summary> public interface IPager { /// <summary> /// 每页项目数 /// </summary> /// <value>The page item count.</value> int PageItemCount { get; set; } /// <summary> /// 总页数 /// </summary> /// <value>The totoal page.</value> int TotoalPage { get; } /// <summary> /// 显示的页数 /// </summary> /// <value>The display page.</value> int DisplayPage { get; set; } /// <summary> /// 满足条件的总数目 /// </summary> int TotalItem { get; set; } } }
2.定义IUsersRepository，主要处理User 相关的业务逻辑。Find函数是主要的查询方法，order表示顺反排序。
public interface IUsersRepository : IPager { /// <summary> /// Post list /// </summary> /// <param name="order">Order expression</param> /// <param name="filter">Filter expression</param> /// <param name="skip">Records to skip</param> /// <param name="take">Records to take</param> /// <returns>List of users</returns> IEnumerable<User> Find(int order=0,string filter="", int skip = 0, int take = 10); /// <summary> /// Get single post /// </summary> /// <param name="name">User id</param> /// <returns>User object</returns> User FindByName(string name); /// <summary> /// Add new user /// </summary> /// <param name="user">Blog user</param> /// <returns>Saved user</returns> User Add(User user); /// <summary> /// Update user /// </summary> /// <param name="user">User to update</param> /// <returns>True on success</returns> bool Update(User user); /// <summary> /// Save user profile /// </summary> /// <param name="user">Blog user</param> /// <returns>True on success</returns> bool SaveProfile(User user); /// <summary> /// Delete user /// </summary> /// <param name="userName">User ID</param> /// <returns>True on success</returns> bool Remove(string userName); }
二、仓库的实现和绑定
主要方法：Membership的中的User和我们自定义的不一样，所以存在一个转换
public class UsersRepository : IUsersRepository { /// <summary> /// The _user list /// </summary> private List<User> _userList = new List<User>(); /// <summary> /// The _page item count /// </summary> private int _pageItemCount; /// <summary> /// The _display page /// </summary> private int _displayPage; /// <summary> /// The _usercount /// </summary> private int _usercount; /// <summary> /// The _total item /// </summary> private int _totalItem; /// <summary> /// 标记是否有查询条件 没有的话则返回全部数目 /// </summary> private Func<User, bool> _func; /// <summary> /// Gets or sets the users. /// </summary> /// <value>The users.</value> public List<User> Users { get { int count; var usercollection = Membership.GetAllUsers(0, 999, out count); if (count == _usercount) return _userList; _usercount = count; var members = usercollection.Cast<MembershipUser>().ToList(); foreach (var membershipUser in members)//这里存在一个转换 { _userList.Add(new User { Email = membershipUser.Email, UserName = membershipUser.UserName, //roles password }); } return _userList; } set { _userList = value; } }
//查询
public IEnumerable<User> Find(int order = 0, string filter = "", int skip = 0, int take = 10) { if (take == 0) take = Users.Count;
//过滤 _func = string.IsNullOrEmpty(filter) ? (Func<User, bool>) (n => n.UserName != "") : (n => n.UserName.Contains(filter)); var users = Users.Where(_func).ToList(); //更新总数目 _totalItem = users.Count; users = order == 0 ? users.OrderBy(n => n.UserName).ToList() : users.OrderByDescending(n => n.UserName).ToList(); return users.Skip(skip).Take(take); } /// <summary> /// 每页项目数 /// </summary> /// <value>The page item count.</value> public int PageItemCount { get { if (_pageItemCount == 0) { _pageItemCount = ProtalConfig.UserPageItemCount; } return _pageItemCount; } set { _pageItemCount = value; } } /// <summary> /// 总页数 /// </summary> /// <value>The totoal page.</value> public int TotoalPage { get { var page = (int) Math.Ceiling((double) TotalItem/PageItemCount); return page==0?1:page; } } /// <summary> /// 显示的页数 /// </summary> /// <value>The display page.</value> public int DisplayPage { get { if (_displayPage == 0) { _displayPage = ProtalConfig.UserDisplayPage; } return _displayPage; } set { _displayPage = value; } } /// <summary> /// 满足条件的总数目 保持更新 /// </summary> /// <value>The total item.</value> public int TotalItem { get { if (_func == null) _totalItem = Users.Count; return _totalItem; } set { _totalItem = value; } } }
ProtalConfig.UserDisplayPage 这里是通过配置实现一个默认页数，让用户可以再webconfig中更改行列的数目。
View Code再进行绑定：
_kernel.Bind<IUsersRepository>().To<UsersRepository>();
三、控制器部分
我们需要两个页面，一个主页面Index，一个负责局部刷新的部分视图 UserTable
下面是主要的方法，主要逻辑都在在仓库中处理了。
[Authorize] public class UserManagerController : Controller { /// <summary> /// The _repository /// </summary> private readonly IUsersRepository _repository; /// <summary> /// Initializes a new instance of the <see cref="UserManagerController"/> class. /// </summary> /// <param name="iRepository">The i repository.</param> public UserManagerController(IUsersRepository iRepository) { _repository = iRepository; } /// <summary> /// Indexes the specified page index. /// </summary> /// <param name="pageIndex">Index of the page.</param> /// <returns>ActionResult.</returns> public ActionResult Index(int pageIndex=1) { ViewBag.DisplayPage = _repository.DisplayPage; pageIndex = HandlePageindex(pageIndex); //支持地址栏直接分页 ViewBag.CurrentPage = pageIndex; return View(); } /// <summary> /// Users table. 分页模块 /// </summary> /// <param name="pageIndex">Index of the page.</param> /// <param name="order">The order.</param> /// <param name="filter">The filter str.</param> /// <returns>ActionResult.</returns> public ActionResult UserTable(int pageIndex = 1, int order = 0, string filter = "") { pageIndex = HandlePageindex(pageIndex); var skip = (pageIndex - 1) * _repository.PageItemCount; var users = _repository.Find(order,filter, skip, _repository.PageItemCount); //总用户数 ViewBag.TotalUser = _repository.TotalItem; //总页数 ViewBag.TotalPageCount = _repository.TotoalPage; ; return PartialView(users); } /// <summary> /// 处理页数 防止过大或过小 /// </summary> /// <param name="index"></param> /// <returns></returns> private int HandlePageindex(int index) { var totoalpage = _repository.TotoalPage; if (index == 0) return 1; return index > totoalpage ? totoalpage : index; }
}
四、视图部分Html jquery
1.Index.cshtml
<script src="~/Scripts/form.js"></script> <div class="container"> <h4 class="bottomline">管理用户</h4> <p> <button data-target="#adduser" id="adduserbt" data-toggle="modal" class="btn btn-info btn-hover">新增用户</button> <button class="btn btn-danger" id="deluser">删除</button> <span class="errorinfo"></span> <input type="search" class="pull-right" id="usersearch" placeholder="搜索"/> </p> <div id="userpart"> @Html.Action("UserTable",new{pageIndex=ViewBag.CurrentPage}) </div> <div id="userpager"></div> <input type="hidden" id="dispalypage" value="@ViewBag.DisplayPage"/> <input type="hidden" id="page" value="@ViewBag.CurrentPage"/> <input type="hidden" id="currentpage" value="@ViewBag.CurrentPage"/> </div> <div class="modal fade adduserbox"id="adduser" tabindex="1" role="dialog" aria-hidden="true"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-hidden="true" >×</button> <h4 class="modal-title">Add new User</h4> </div> <div class="modal-body"> @{ Html.RenderAction("Create","UserManager"); } </div> </div> </div> @section Scripts { @Scripts.Render("~/bundles/jqueryval") }
2.UserTable.cshtml,角色部分还未处理，这个表格更新之后，也会更新满足条件的用户数和新的总页数，触发Jpaginate重新分页一次。
@model IEnumerable<Protal.Model.Data.User.User> <table id="usertable" class="table table-striped table-condensed table-hover table-bordered"> <tr> <th><input type="checkbox" id="allcheck" /><label for="allcheck">全选</label></th> <th><a href="#" id="usersort" data-order="0" class="glyphicon-sort">名称</a></th> <th>角色</th> <th>E-mail</th> </tr> <tbody> @foreach (var item in Model) { <tr> <td> <input type="checkbox" data-id="@item.UserName" /></td> <td> <a>@item.UserName</a> </td> <td> @Html.Raw(item.Role) </td> <td> @item.Email</td> </tr> }</tbody> <tfoot> <tr> <td colspan="4"> <span>@Html.Raw("共"+ViewBag.TotalUser+"人")</span> @*<span>@ViewBag.TotalPageCount</span>*@ </td> </tr> </tfoot> </table> <input type="hidden" id="totoalpage" value="@ViewBag.TotalPageCount"/>
3.脚本
其中用到的像checkall，infoShow 都是自己扩展的一些简单的方法，用于全选和提示。
View Code到这里就是全部的代码,供大家和自己参考。
再给大家看两个效果图，一个是kendoui的grid，一个是Angular做的分页。后面有机会给大家介绍。
Kendo- Grid
Kendo和MVC框架融合度比较高，它的核心代码如下：
View CodeAngularJs 核心还是调用封装好的API函数，相当于上面的仓库中的方法，然后通过模型绑定。
总结一下：自己实现代码量比较多，功能不全，有重复造轮子的感觉，但可以较好的控制，基本够用；kendo的方式感觉高大全，用熟了开发速度快。就是多一些引用，且需要担心kendoui和其他的ui框架会有冲突。前端MVVM的方式我了解还不够深，感觉前端脚本的代码量也蛮多，效果不错。但生成的html代码很少。上面这个表格。chrome F12或者右键查看源码都是下面这样子的：
主要的就一个div
<div data-ng-app="blogAdmin" data-ng-view="" id="ng-view"></div>
自我保护倒是蛮好，也就是SEO可能有问题。应该还有更好的方式，猿友们指点指点。
View Code希望对你有帮助，Tks！
