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一个WEB应用程序中经常会用到数据分页,本文将实现一个简单通用的分页组件,包含一个 PagerModel
(用来保存页码信息),一个 HtmlHelper
的 Pager
扩展方法和一个 PagedListModel<T>
分页数据模型。
PagerModel 用来保存分页信息,代码实现如下:
1 /// <summary> 2 /// PagerModel 分页模型 3 /// </summary> 4 public class PagerModel 5 { 6 public int PageIndex { get; set; } 7 8 public int PageSize { get; set; } 9 10 public int PageCount { get; private set; } 11 12 public int TotalCount { get; set; } 13 14 public PagerModel(int totalCount) 15 { 16 PageIndex = 1; 17 PageSize = 10; 18 TotalCount = totalCount; 19 PageCount = Convert.ToInt32(Math.Ceiling(TotalCount * 1.0 / PageSize)); 20 } 21 22 public PagerModel(int pageSize, int totalCount) 23 { 24 PageIndex = 1; 25 PageSize = pageSize; 26 TotalCount = totalCount; 27 PageCount = Convert.ToInt32(Math.Ceiling(TotalCount * 1.0 / PageSize)); 28 } 29 30 public PagerModel(int pageIndex, int pageSize, int totalCount) 31 { 32 PageIndex = pageIndex; 33 PageSize = pageSize; 34 TotalCount = totalCount; 35 PageCount = Convert.ToInt32(Math.Ceiling(TotalCount * 1.0 / PageSize)); 36 } 37 }
/// <summary> /// PagerModel 分页模型 /// </summary> public class PagerModel { public int PageIndex { get; set; } public int PageSize { get; set; } public int PageCount { get; private set; } public int TotalCount { get; set; } public PagerModel(int totalCount) { PageIndex = 1; PageSize = 10; TotalCount = totalCount; PageCount = Convert.ToInt32(Math.Ceiling(TotalCount * 1.0 / PageSize)); } public PagerModel(int pageSize, int totalCount) { PageIndex = 1; PageSize = pageSize; TotalCount = totalCount; PageCount = Convert.ToInt32(Math.Ceiling(TotalCount * 1.0 / PageSize)); } public PagerModel(int pageIndex, int pageSize, int totalCount) { PageIndex = pageIndex; PageSize = pageSize; TotalCount = totalCount; PageCount = Convert.ToInt32(Math.Ceiling(TotalCount * 1.0 / PageSize)); } }
Pager扩展方法 可根据自己的需求进行定制话实现,Pager扩展方法需要一个PagerModel类型的参数来生成页码,我这里是用的bootstrap的样式来做的分页,整个系统用的是同一个样式的分页所以把样式直接写死在代码里了。
Pager这里的代码重构做的不是太好,我觉得主要两个地方:
* 样式直接写死,前端不好维护
* 点击页码触发的事件直接写死了,如果需要改成其他名称则需要改动 Pager扩展方法 代码
1 /// <summary> 2 /// PagerHelper 分页帮助类 3 /// </summary> 4 public static class PagerHelper 5 { 6 public static MvcHtmlString Pager(this HtmlHelper helper, PagerModel pager) 7 { 8 StringBuilder sbHtmlText = new StringBuilder(); 9 sbHtmlText.Append("<div style=\"text-align:center\"><nav><ul class=\"pagination\">"); 10 if (pager.PageIndex <= 1) 11 { 12 sbHtmlText.Append("<li class=\"disabled\"><a href=\"javascript:void()\" aria-label=\"Previous\"><span aria-hidden=\"true\">«</span></a></li>"); 13 } 14 else 15 { 16 sbHtmlText.AppendFormat("<li><a href=\"javascript:loadData({0})\" aria-label=\"{0}\"><span aria-hidden=\"true\">«</span></a></li>", pager.PageIndex - 1); 17 sbHtmlText.AppendFormat("<li><a href=\"javascript:loadData({0})\">{0}</a></li>", pager.PageIndex - 1); 18 } 19 sbHtmlText.AppendFormat("<li class=\"active\"><a href=\"javascript:void()\">{0}<span class=\"sr-only\">(current)</span></a></li>", pager.PageIndex); 20 if (pager.PageIndex >= pager.PageCount) 21 { 22 sbHtmlText.Append("<li class=\"disabled\"><a href=\"javascript:void()\" aria-label=\"Next\"><span aria-hidden=\"true\">»</span></a></li>"); 23 } 24 else 25 { 26 sbHtmlText.AppendFormat("<li><a href=\"javascript:loadData({0})\">{0}</a></li>", pager.PageIndex + 1); 27 sbHtmlText.AppendFormat("<li><a href=\"javascript:loadData({0})\" aria-label=\"Next\"><span aria-hidden=\"true\">»</span></a></li>", pager.PageIndex + 1); 28 } 29 sbHtmlText.Append("</ul></nav>"); 30 sbHtmlText.AppendFormat("<div><span>每页有<strong>{0}</strong>条数据,一共有<strong>{1}</strong>页,总计<strong>{2}</strong>条数据</span></div></div>", pager.PageSize, pager.PageCount, pager.TotalCount); 31 return MvcHtmlString.Create(sbHtmlText.ToString()); 32 } 33 }
/// <summary> /// PagerHelper 分页帮助类 /// </summary> public static class PagerHelper { public static MvcHtmlString Pager(this HtmlHelper helper, PagerModel pager) { StringBuilder sbHtmlText = new StringBuilder(); sbHtmlText.Append("<div style=\"text-align:center\"><nav><ul class=\"pagination\">"); if (pager.PageIndex <= 1) { sbHtmlText.Append("<li class=\"disabled\"><a href=\"javascript:void()\" aria-label=\"Previous\"><span aria-hidden=\"true\">«</span></a></li>"); } else { sbHtmlText.AppendFormat("<li><a href=\"javascript:loadData({0})\" aria-label=\"{0}\"><span aria-hidden=\"true\">«</span></a></li>", pager.PageIndex - 1); sbHtmlText.AppendFormat("<li><a href=\"javascript:loadData({0})\">{0}</a></li>", pager.PageIndex - 1); } sbHtmlText.AppendFormat("<li class=\"active\"><a href=\"javascript:void()\">{0}<span class=\"sr-only\">(current)</span></a></li>", pager.PageIndex); if (pager.PageIndex >= pager.PageCount) { sbHtmlText.Append("<li class=\"disabled\"><a href=\"javascript:void()\" aria-label=\"Next\"><span aria-hidden=\"true\">»</span></a></li>"); } else { sbHtmlText.AppendFormat("<li><a href=\"javascript:loadData({0})\">{0}</a></li>", pager.PageIndex + 1); sbHtmlText.AppendFormat("<li><a href=\"javascript:loadData({0})\" aria-label=\"Next\"><span aria-hidden=\"true\">»</span></a></li>", pager.PageIndex + 1); } sbHtmlText.Append("</ul></nav>"); sbHtmlText.AppendFormat("<div><span>每页有<strong>{0}</strong>条数据,一共有<strong>{1}</strong>页,总计<strong>{2}</strong>条数据</span></div></div>", pager.PageSize, pager.PageCount, pager.TotalCount); return MvcHtmlString.Create(sbHtmlText.ToString()); } }
PagedListModel 用来封装返回到视图 View 的数据和 分页模型 PagerModel,实现代码如下
1 public class PagedListModel<T> where T : class, new() 2 { 3 public List<T> Data { get; set; } 4 5 public PagerModel Pager { get; set; } 6 }
public class PagedListModel<T> where T : class, new() { public List<T> Data { get; set; } public PagerModel Pager { get; set; } }
控制器处理代码如下:
search 是一个包含了 PageIndex 和 PageSize 的请求参数
1 int rowsCount = 0; 2 try 3 { 4 List<Models.BlockEntity> blockList = new Business.BLLBlockEntity().GetPagedList(search.PageIndex, search.PageSize, out rowsCount, whereLambda, b => b.BlockTime, false); 5 PagerModel pager = new PagerModel(search.PageIndex, search.PageSize, rowsCount); 6 PagedListModel<Models.BlockEntity> dataList = new PagedListModel<Models.BlockEntity>() { Pager = pager, Data = blockList }; 7 return View(dataList); 8 } 9 catch (Exception ex) 10 { 11 logger.Error(ex); 12 throw; 13 }
int rowsCount = 0; try { List<Models.BlockEntity> blockList = new Business.BLLBlockEntity().GetPagedList(search.PageIndex, search.PageSize, out rowsCount, whereLambda, b => b.BlockTime, false);//记录日志 PagerModel pager = new PagerModel(search.PageIndex, search.PageSize, rowsCount);//定义Pager Model PagedListModel<Models.BlockEntity> dataList = new PagedListModel<Models.BlockEntity>() { Pager = pager, Data = blockList };//定义返回到 View 的 PagedListModel return View(dataList); } catch (Exception ex) { logger.Error(ex);//记录日志 throw; }
1 @using ActivityReservation.Helpers; 2 @model PagedListModel<Models.BlockEntity> 3 @{ 4 Layout = null; 5 } 6 <table class="table table-hover"> 7 <thead> 8 <tr> 9 <th>黑名单类型</th> 10 <th>黑名单内容</th> 11 <th>拉入黑名单时间</th> 12 <th>状态</th> 13 <th>操作</th> 14 </tr> 15 </thead> 16 <tbody> 17 @foreach (Models.BlockEntity item in Model.Data) 18 { 19 string className = "bg-success"; 20 if (!item.IsActive) 21 { 22 className = "bg-danger"; 23 } 24 <tr class="@className"> 25 <td> 26 @item.BlockType.TypeName 27 </td> 28 <td> 29 @item.BlockValue 30 </td> 31 <td> 32 @item.BlockTime 33 </td> 34 <td> 35 @if (item.IsActive) 36 { 37 <span>启用</span> 38 } 39 else 40 { 41 <span>禁用</span> 42 } 43 </td> 44 <td> 45 @if (item.IsActive) 46 { 47 <button type="button" class=‘btn btn-warning‘ onclick="UpdateStatus(‘@item.BlockId‘, ‘@item.BlockValue‘,-1,this)">禁用</button> 48 } 49 else 50 { 51 <button type="button" class=‘btn btn-warning‘ onclick="UpdateStatus(‘@item.BlockId‘,‘@item.BlockValue‘,1,this)">启用</button> 52 } 53 <button type="button" class="btn btn-danger" onclick="DeleteEntity(‘@item.BlockId‘,‘@item.BlockValue‘,this)">删除</button> 54 </td> 55 </tr> 56 } 57 </tbody> 58 </table> 59 @Html.Pager(Model.Pager)
首先在页面顶部声明 model 模型
@model PagedListModel<Models.BlockEntity>
在页面上遍历数据
@foreach (Models.BlockEntity item in Model.Data)
在需要添加分页信息的地方使用 HtmlHelper 的 Pager 扩展方法
@Html.Pager(Model.Pager)
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原文地址:http://www.cnblogs.com/ben121011/p/simplePagerInAspNetMvc.html