相思资源网

灵活掌握Asp.net MVC中GridView的使用方法
站长资源 2024/11/12 佚名
18 1538
相思资源网 Design By www.200059.com

本文教程为大家分享了GridView控件的使用方法和具体实现代码，供大家参考，具体内容如下

Models文件下实体类:

 public class Customer
 {
 public int Id { get; set; } 
 public string CompanyName { get; set; } 
 public string ContactTitle { get; set; }
 public string Address { get; set; }
 public string City { get; set; }  
 public string Country { get; set; }
 public string Phone { get; set; }
 public DateTime Founded { get; set; }
 }


 public class CustomersViewModel

 {
 public IQueryable<Customer> Customers { get; set; }

 public PagingInfo PagingInfo { get; set; }

 public string JsonPagingInfo { get; set; }
 }


 public static class ExpresssionBuilder
 {
 private static readonly MethodInfo containsMethod = typeof(string).GetMethod("Contains");
 private static readonly MethodInfo startsWithMethod = typeof(string).GetMethod("StartsWith", new Type[] { typeof(string) });
 private static readonly MethodInfo endsWithMethod = typeof(string).GetMethod("EndsWith", new Type[] { typeof(string) });


 public static Expression<Func<T,bool GetExpression<T>(IList<FilterObject> filters)
 {
  if (filters.Count == 0)
  return null;

  ParameterExpression param = Expression.Parameter(typeof(T), "t");
  Expression exp = null;

  if (filters.Count == 1)
  exp = GetExpression<T>(param, filters[0]);
  else if (filters.Count == 2)
  exp = GetExpression<T>(param, filters[0], filters[1]);
  else
  {
  while (filters.Count > 0)
  {
   var f1 = filters[0];
   var f2 = filters[1];

   if (exp == null)
   exp = GetExpression<T>(param, filters[0], filters[1]);
   else
   exp = Expression.AndAlso(exp, GetExpression<T>(param, filters[0], filters[1]));

   filters.Remove(f1);
   filters.Remove(f2);

   if (filters.Count == 1)
   {
   exp = Expression.AndAlso(exp, GetExpression<T>(param, filters[0]));
   filters.RemoveAt(0);
   }
  }
  }

  return Expression.Lambda<Func<T, bool(exp, param);
 }

 private static Expression GetExpression<T>(ParameterExpression param, FilterObject filter)
 {
  MemberExpression member = Expression.Property(param, filter.Column);
  //ConstantExpression constant = Expression.Constant(filter.Value);

  //新的逻辑来处理可空Decimal和DateTime值
  UnaryExpression constant = null;
  if (member.Type == typeof(Decimal"htmlcode">



 public class PagingInfo
 {
 public List<int> PageOptions { get; set; }

 public bool ShowPageOptions { get; set; }

 public int TotalItems { get; set; }
 public int ItemsPerPage { get; set; }
 public int CurrentPage { get; set; }

 public int TotalPages
 {
  get { return (int)Math.Ceiling((decimal)TotalItems / (ItemsPerPage != 0 "true";
  if (valueType != typeof (DateTime))
  {
  switch (filterObj.Operator)
  {
   case FilterOperator.Contains:
   if (valueType == typeof (string))
    whereClause += string.Format(" {0} {1}.Contains(\"{2}\")", filterObj.Conjunction,
    filterObj.Column, filterObj.Value);
   break;
   case FilterOperator.GreaterThan:
   if (valueType != typeof (string))
    whereClause += string.Format(" {0} {1} > {2}", filterObj.Conjunction, filterObj.Column,
    filterObj.Value);
   break;
   case FilterOperator.GreaterThanOrEqual:
   if (valueType != typeof (string))
    whereClause += string.Format(" {0} {1} >= {2}", filterObj.Conjunction, filterObj.Column,
    filterObj.Value);
   break;
   case FilterOperator.LessThan:
   if (valueType != typeof (string))
    whereClause += string.Format(" {0} {1} < {2}", filterObj.Conjunction, filterObj.Column,
    filterObj.Value);
   break;
   case FilterOperator.LessThanOrEqual:
   if (valueType != typeof (string))
    whereClause += string.Format(" {0} {1} <= {2}", filterObj.Conjunction, filterObj.Column,
    filterObj.Value);
   break;
   case FilterOperator.StartsWith:
   if (valueType != typeof (string))
    whereClause += string.Format(" {0} {1}.StartsWith(\"{2}\")", filterObj.Conjunction,
    filterObj.Column, filterObj.Value);
   break;
   case FilterOperator.EndsWith:
   if (valueType != typeof (string))
    whereClause += string.Format(" {0} {1}.EndsWith(\"{2}\")", filterObj.Conjunction,
    filterObj.Column, filterObj.Value);
   break;
   case FilterOperator.Equals:

   whereClause +=
    string.Format(valueType == typeof (string) " {0} {1} == \"{2}\"" : " {0} {1} == {2}",
    filterObj.Conjunction, filterObj.Column, filterObj.Value);
   break;
   case FilterOperator.NotEqual:

   whereClause +=
    string.Format(valueType == typeof (string) " {0} {1} != \"{2}\"" : " {0} {1} != {2}",
    filterObj.Conjunction, filterObj.Column, filterObj.Value);
   break;
   default:
   throw new ArgumentOutOfRangeException();
  }
  }
  else
  {
  DateTime dt;
  DateTime.TryParse(filterObj.Value, out dt);

  switch (filterObj.Operator)
  {
   case FilterOperator.Contains:   
   break;
   case FilterOperator.GreaterThan:

    whereClause += string.Format(" {0} {1} > DateTime(\"{2}\")", filterObj.Conjunction, filterObj.Column, dt);
   break;
   case FilterOperator.GreaterThanOrEqual:

   whereClause += string.Format(" {0} {1} >= DateTime(\"{2}\")", filterObj.Conjunction, filterObj.Column, dt);
   break;
   case FilterOperator.LessThan:

   whereClause += string.Format(" {0} {1} < DateTime(\"{2}\")", filterObj.Conjunction, filterObj.Column, dt);
   break;
   case FilterOperator.LessThanOrEqual:
   whereClause += string.Format(" {0} {1} <= DateTime(\"{2}\")", filterObj.Conjunction, filterObj.Column, dt);
   break;
   case FilterOperator.StartsWith:   
   break;
   case FilterOperator.EndsWith:   
   break;
   case FilterOperator.Equals:
   whereClause += string.Format(" {0} {1} == DateTime(\"{2}\")", filterObj.Conjunction, filterObj.Column, dt);
   break;
   case FilterOperator.NotEqual:
   whereClause += string.Format(" {0} {1} != DateTime(\"{2}\")", filterObj.Conjunction, filterObj.Column, dt);
   break;
   default:
   throw new ArgumentOutOfRangeException();
  }
  }
  return whereClause;
 }
 }







 





 public class GridViewModelProvider
 { 
 internal static CustomersViewModel GetCustomersViewModel(MyDbContext db, PagingInfo PagingData)
 { 
  int TotalItems = 0;
  var model = new CustomersViewModel()
  {

  Customers = GetResources(db.Customers.AsQueryable(), PagingData, out TotalItems),  
  PagingInfo = new PagingInfo()
  {
   CurrentPage = PagingData.CurrentPage,
   ItemsPerPage = PagingData.ItemsPerPage,
   PageOptions = new List<int>() { 10, 25, 50, 100 },
   ShowPageOptions = true,
   SearchTerm = PagingData.SearchTerm,
   Sort = PagingData.Sort,
   Filters = PagingData.Filters
  }  
  };

  model.PagingInfo.TotalItems = TotalItems;
  model.JsonPagingInfo = Json.Encode(model.PagingInfo);

  return model;
 }

 private static IQueryable<Customer> GetResources(IQueryable<Customer> Customers, PagingInfo PagingData, out int TotalItems)
 {
  var customers = Customers;

  //search
  if (!string.IsNullOrEmpty(PagingData.SearchTerm))
  {
  customers = customers.Where(x => (x.CompanyName.Contains(PagingData.SearchTerm) || x.ContactTitle.Contains(PagingData.SearchTerm)));
  }

  //filter
  if (PagingData.Filters != null)
  {  
  foreach (var filterObj in PagingData.Filters)
  {
   switch (filterObj.Column)
   {
   case "City":
    if (filterObj.Value.ToLower() != "all")
    customers = customers.Where(Extensions.GetWhereClause(filterObj, typeof(string)));
    break;

   //Add Other Filter Columns Here
   }
  }    
  }


  TotalItems = customers.Count();

  //sort
  customers = customers.OrderBy(x => x.Id);
  if (PagingData.Sort != null)
  {
  switch (PagingData.Sort.Direction)
  {
   case SortDirection.Ascending:
   if (PagingData.Sort.SortColumn == "CompanyName")
   {
    customers = customers.OrderBy(x => x.CompanyName);
   }
   else if (PagingData.Sort.SortColumn == "ContactTitle")
   {
    customers = customers.OrderBy(x => x.ContactTitle);
   }
   break;
   case SortDirection.Descending:
   if (PagingData.Sort.SortColumn == "CompanyName")
   {
    customers = customers.OrderByDescending(x => x.CompanyName);
   }
   else if (PagingData.Sort.SortColumn == "ContactTitle")
   {
    customers = customers.OrderByDescending(x => x.ContactTitle);
   }
   break;
   case SortDirection.NotSet:
   default:
   break;
  }
  }
  customers = customers
  .Skip((PagingData.CurrentPage - 1) * PagingData.ItemsPerPage).Take(PagingData.ItemsPerPage);

  return customers;
 } 
 }












 /// <summary>
 /// 启用查询谓词的高效，动态组合。
 /// </summary>
 public static class PredicateBuilder
 {
 /// <summary>
 /// 创建一个计算结果为true的谓词。
 /// </summary>
 public static Expression<Func<T, bool True<T>() { return param => true; }

 /// <summary>
 /// 创建一个计算结果为false的谓词
 /// </summary>
 public static Expression<Func<T, bool False<T>() { return param => false; }

 /// <summary>
 /// 创建一个从指定的lambda表达式的谓词表达式。
 /// </summary>
 public static Expression<Func<T, bool Create<T>(Expression<Func<T, bool predicate) { return predicate; }

 /// <summary>
 /// 结合了第二第一谓词使用逻辑“and”。
 /// </summary>
 public static Expression<Func<T, bool And<T>(this Expression<Func<T, bool first, Expression<Func<T, bool second)
 {
  return first.Compose(second, Expression.AndAlso);
 }

 /// <summary>
 /// 结合了第二第一谓词使用逻辑“or”。
 /// </summary>
 public static Expression<Func<T, bool Or<T>(this Expression<Func<T, bool first, Expression<Func<T, bool second)
 {
  return first.Compose(second, Expression.OrElse);
 }

 /// <summary>
 ///否定谓词
 /// </summary>
 public static Expression<Func<T, bool Not<T>(this Expression<Func<T, bool expression)
 {
  var negated = Expression.Not(expression.Body);
  return Expression.Lambda<Func<T, bool(negated, expression.Parameters);
 }

 /// <summary>
 /// 使用指定的合并函数，合并第二和第一表达式
 /// </summary>
 static Expression<T> Compose<T>(this Expression<T> first, Expression<T> second, Func<Expression, Expression, Expression> merge)
 {
  //第二参数映射到第一参数
  var map = first.Parameters
  .Select((f, i) => new { f, s = second.Parameters[i] })
  .ToDictionary(p => p.s, p => p.f);

  //第一lambda表达式的参数替换在第二lambda表达式参数
  var secondBody = ParameterRebinder.ReplaceParameters(map, second.Body);

  //从第一个表达式创建一个带参数的合并lambda表达式
  return Expression.Lambda<T>(merge(first.Body, secondBody), first.Parameters);
 }

 class ParameterRebinder : ExpressionVisitor
 {
  readonly Dictionary<ParameterExpression, ParameterExpression> map;

  ParameterRebinder(Dictionary<ParameterExpression, ParameterExpression> map)
  {
  this.map = map "htmlcode">



 public class MyDbContext : DbContext
 {
 public MyDbContext()
  : base("DefaultConnection")
 {

 }

 public DbSet<Customer> Customers { get; set; }

 protected override void OnModelCreating(DbModelBuilder modelBuilder)
 {  
  modelBuilder.Entity<Customer>().Property(c => c.CompanyName).HasMaxLength(40);
  modelBuilder.Entity<Customer>().Property(c => c.ContactTitle).HasMaxLength(40);
 }
 }






HomeController.cs控制器:







 public class HomeController : Controller
 {
 public ActionResult Index()
 {
  var model = new CustomersViewModel()
  {
  Customers = null,
  PagingInfo = new PagingInfo()
  {
   CurrentPage=1,
   ItemsPerPage= 10,
   PageOptions = new List<int>() { 10,25, 50, 100},
   ShowPageOptions= true,
   TotalItems=1
  }
  };
  return View(model);
 }

 public ActionResult GetCustomers(PagingInfo PagingData)
 {
  var db = new MyDbContext();
  var model = GridViewModelProvider.GetCustomersViewModel(db, PagingData);  
  return PartialView("_CustomersPartial", model);
 }

 public ActionResult About()
 {
  ViewBag.Message = "您的应用程序描述页面。";

  return View();
 }

 public ActionResult Contact()
 {
  ViewBag.Message = "您的联系页面。";

  return View();
 }
 }







Home视图文件夹下:


_CustomersPartial.cshtml





@model mesoft.gridview.Models.CustomersViewModel

@*在这里写下返回的数据的详细信息*@
<span class="gridview-data-details" style="display:none;">@Html.Raw(Model.JsonPagingInfo)</span>

<table class="table table-bordered table-striped">
 <thead>
 <tr class="gridview-list-header">
  <th>
  @(Html.DisplayNameFor(x => x.Customers.FirstOrDefault().Id))
  </th>
  <th class="sortable" data-sort="CompanyName">
  @(Html.DisplayNameFor(x => x.Customers.FirstOrDefault().CompanyName))
  </th>
  <th class="sortable" data-sort="ContactTitle">
  @(Html.DisplayNameFor(x => x.Customers.FirstOrDefault().ContactTitle))
  </th>
  <th>
  @(Html.DisplayNameFor(x => x.Customers.FirstOrDefault().Country))
  </th>
  <th>
  @(Html.DisplayNameFor(x => x.Customers.FirstOrDefault().City))
  </th>
  <th>
  @(Html.DisplayNameFor(x => x.Customers.FirstOrDefault().Address))
  </th>
  <th>
  @(Html.DisplayNameFor(x => x.Customers.FirstOrDefault().Phone))
  </th>
  <th>
  @Html.DisplayNameFor(x=> x.Customers.FirstOrDefault().Founded)
  </th>
 </tr>
 </thead>

 <tbody id="CustomersTable" class="gridview-list-items">
 @if (Model.Customers.Any())
 {
  foreach (var c in Model.Customers)
  {
  <tr>
   <td class="value">@c.Id</td>
   <td class="value">@c.CompanyName</td>
   <td class="value">@c.ContactTitle</td>
   <td class="value">@c.Country</td>
   <td class="value">@c.City</td>
   <td class="Description">@c.Address</td>
   <td class="value">@c.Phone</td>
   <td>@c.Founded</td>
  </tr>
  }
 }
 else
 {
  <tr>
  <td colspan="8">
   <div class="alert alert-warning alert-dismissable">
   <button type="button" class="close" data-dismiss="alert" aria-hidden="true">×</button>
   <strong>警告！</strong> 没有客户找到！
   </div>
  </td>
  </tr>
 }

 @Html.Raw(ViewBag.Script)
 </tbody>

</table>







_GridViewPartial.cshtml





@model mesoft.gridview.Models.CustomersViewModel

<!-- GRIDVIEW-->
<div class="gridview gridview1">
 <!-- GridView Header-->
 <div class="gridview-header">
 <!--GridView的头的左边部分-->
 <div class="col-sm-6">
  <div class="gridview-search">
  <div class="search input-group">
   <input class="form-control" placeholder="Search" type="search">
   <span class="input-group-btn">
   <button class="btn btn-default" type="button">
    <span class="fa fa-search"></span>
    <span class="sr-only">Search</span>
   </button>
   </span>
  </div>
  </div>
 </div>

 <!-- GridView的头右边部分-->
 <div class="col-sm-6 text-right">
  <!-- 这里添加任何筛选操作-->
  @{
  string[] cityFilters = {"Istanbul", "Trabzon", "Ankara", "Izmir", "Samsun", "Erzurum"};
  }

  根据城市筛选: 
  <div class="btn-group">
  <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown">
   Select City <span class="caret"></span>
  </button>
  <ul class="dropdown-menu filter-parent" role="menu">
   @foreach (var city in cityFilters)
   {
   <li><a href="#" class="filter"
    data-filter-column="City"    
    data-filter-value="@city"
    data-filter-operator="@mesoft.gridview.Models.FilterOperator.Equals"
    data-filter-conjunction="@mesoft.gridview.Models.FilterConjunction.And">@city</a></li>
   }
   <li class="divider"></li>
   <li class="active"><a href="#" class="filter"
     data-filter-column="City"
     data-filter-value="All">All</a></li>
  </ul>
  </div>
 </div>
 </div>

 <!-- GridView ViewPort-->
 <div class="gridview-viewport" id="viewport"
  data-getdata-function="@Url.Action("GetCustomers", "Home")"
  data-default-pagesize="10">
 <div class="gridview-canvas" style="min-height:400px;">
  @*Data Will Load Here*@
 </div>
 <div class="loading gridview gridview-loader">
  <img src="/UploadFiles/2021-04-02/loading.gif">


About.cshtml





@{
 ViewBag.Title = "About";
}
<h2>@ViewBag.Title.</h2>
<h3>@ViewBag.Message</h3>

<p>#</p>







Contact.cshtml





@{
 ViewBag.Title = "Contact";
}
<h2>@ViewBag.Title.</h2>
<h3>@ViewBag.Message</h3>

<address>
 <strong>Support:</strong> <a href="827937686@qq.com">827937686@qq.com</a><br /> 
</address>







Index.cshtml





@model mesoft.gridview.Models.CustomersViewModel

@{
 ViewBag.Title = "Home Page";
}

<div class="jumbotron">
 <h1>Gridview</h1>
 <p class="lead">简单易用，开发简单</p>
 <p><a href="#" class="btn btn-primary btn-lg">Learn more &raquo;</a></p>
</div>
<!-- GRIDVIEW Area-->
<div class="row">
 @Html.Partial("_GridViewPartial") 
</div>

@section Scripts {
 <script>
 $('.gridview1').meGridView(); 
 //$('.gridview2').meGridView();
 </script>

}







Shared文件夹下：


_Layout.cshtml





<!DOCTYPE html>
<html>
<head>
 <meta charset="utf-8" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>@ViewBag.Title -GridView的用法示例应用程序</title>
 @Styles.Render("~/Content/css")
 @Scripts.Render("~/bundles/modernizr")

</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("GridView", "Index", "Home", new { area = "" }, new { @class = "navbar-brand" })
  </div>
  <div class="navbar-collapse collapse">
  <ul class="nav navbar-nav">
   <li>@Html.ActionLink("Home", "Index", "Home")</li>
   <li>@Html.ActionLink("About", "About", "Home")</li>
   <li>@Html.ActionLink("Contact", "Contact", "Home")</li>
  </ul>
  @*@Html.Partial("_LoginPartial")*@
  </div>
 </div>
 </div>
 <div class="container body-content">
 @RenderBody()
 <hr />
 <footer>
  <p>&copy; @DateTime.Now.Year - WuLex</p>
 </footer>
 </div>

 @Scripts.Render("~/bundles/jquery")
 @Scripts.Render("~/bundles/bootstrap")
 @RenderSection("scripts", required: false)
</body>
</html>







运行结果如图:


灵活掌握Asp.net MVC中GridView的使用方法


为大家附3个精彩的专题：


ASP.NET控件使用手册


ASP.NET数据绑定控件使用汇总


ASP.NET控件使用汇总


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。


                                

                                

                                     

                                

                                    标签：
                                        
asp.net,MVC,GridView

                                     

                                
相思资源网 Design By www.200059.com
广告合作：本站广告合作请联系QQ：858582 申请时备注：广告合作（否则不回）
免责声明：本站文章均来自网站采集或用户投稿，网站不提供任何软件下载或自行开发的软件！ 如有用户或公司发现本站内容信息存在侵权行为，请邮件告知！ 858582#qq.com
相思资源网 Design By www.200059.com

评论“灵活掌握Asp.net MVC中GridView的使用方法”

暂无灵活掌握Asp.net MVC中GridView的使用方法的评论...
www.200059.com 相思资源网
139,976影音资源
144,792福利资源
21,817软件资源
631,128技术资源
一句话新闻
一口气升级7个大模型SaaS应用，百度智能云：突出一个“开箱即用” - 2024/11/12

这一波大模型产业落地浪潮里，不少企业其实处在 “干瞪眼“的状态。

一种情况是，很多大模型产品看得见却摸不着，在台上一个个遥遥领先——今天Sora技精四座，明天英伟达的机器人又赢得满堂彩，可是到了台下一问：啥时候能用上啊？答曰：遥遥无期。

另一种情况是，企业想用上大模型，却又难免瞻前顾后——既要考虑场景融合，又得兼顾安全性，还要考虑打通现有系统，再加上各种部署成本和繁琐的采购流程……最后只能拂袖：罢了，再等等吧。

稳了！魔兽国服回归的3条重磅消息！官宣时间再确认！

昨天有一位朋友在大神群里分享，自己亚服账号被封号之后居然弹出了国服的封号信息对话框。

这里面让他访问的是一个国服的战网网址，com.cn和后面的zh都非常明白地表明这就是国服战网。

而他在复制这个网址并且进行登录之后，确实是网易的网址，也就是我们熟悉的停服之后国服发布的暴雪游戏产品运营到期开放退款的说明。这是一件比较奇怪的事情，因为以前都没有出现这样的情况，现在突然提示跳转到国服战网的网址，是不是说明了简体中文客户端已经开始进行更新了呢？

友情链接

杰晶网络 DDR爱好者之家 桃源资源网 杰网资源 富贵资源网 南强小屋 铁雪资源网 幽灵资源网 万梅资源网 狼山资源网 白云岛资源网 昆仑资源网 相思资源网 明霞山资源网 内蒙古资源网 黑松山资源网 茶园资源网 饿虎岗资源网 大旗谷资源网 常春岛资源网 岱庙资源网 兴国资源网 快活林资源网 蝙蝠岛资源网 帝王谷资源网 白云城资源网 伏龙阁资源网 清风细雨楼 天枫庄资源网 圆月山庄资源网 无争山庄资源网 神水资源网 移花宫资源网 神剑山庄资源网 无为清净楼资源网 金钱帮资源网 丐帮资源网 华山资源网 极乐门资源网 小李飞刀资源网 凤求凰客栈 风云阁资源网 金狮镖局 鸳鸯亭资源网 千金楼资源网 更多链接
相思资源网 Design By www.200059.com