排序，过滤和分页MVC

基本上我已经在本教程的帮助下完成了所有的排序，过滤和分页，这非常非常方便，因为我对这个材料非常新。 无论如何，我现在遇到的问题是尝试对包含多个主键的几个表进行排序和过滤。

http://www.asp.net/mvc/overview/getting-started/getting-started-with-ef-using-mvc/sorting-filtering-and-paging-with-the-entity-framework-in-an- ASP净MVC应用程序

我创建了var应用程序和var数据库，但我认为如果我有办法将它们组合起来，我就不会遇到分页问题。 因为我的回归视图会更简洁。

public ActionResult Index(string sortOrder, string searchString, int? page) { ViewBag.CurrentSort = sortOrder; ViewBag.IDSortParm = String.IsNullOrEmpty(sortOrder) ? "AppID_desc" : ""; ViewBag.NameSortParm = sortOrder == "Name" ? "AppName_desc" : "Name"; ViewBag.ID2SortParm = sortOrder == "ID" ? "DatabaseID_desc" : "ID"; ViewBag.Name2SortParm = sortOrder == "Name2" ? "DatabaseName_desc" : "Name2"; if (Request.HttpMethod != "GET") { page = 1; } ViewBag.CurrentFilter = searchString; var applications = from a in db.Application_ select a; var databases = from d in db.Database_ //this is what I added select d; if (!String.IsNullOrEmpty(searchString)) { applications = applications.Where(s => s.AppName.ToUpper().Contains(searchString.ToUpper())); databases = databases.Where(d => d.DatabaseName.ToUpper().Contains(searchString.ToUpper())); //also what I added } switch (sortOrder) { case "AppID_desc": applications = applications.OrderByDescending(a => a.AppID); break; case "Name": applications = applications.OrderBy(a => a.AppName); break; case "AppName_desc": applications = applications.OrderByDescending(a => a.AppName); break; case "Name2": databases = databases.OrderBy(d=> d.DatabaseName); break; case "DatabaseName_desc": databases = databases.OrderByDescending(d => d.DatabaseName); break; default: applications = applications.OrderBy(a => a.AppID); break; } int pageSize = 10; int pageNumber = (page ?? 1); return View(applications.ToPagedList(pageNumber, pageSize)); } 

我添加了var数据库，因为我需要在application_ table中搜索值以及应用程序表。

指数：

 @using (Html.BeginForm()) { 
 Search Name: @Html.TextBox("Search_Data", ViewBag.FilterValue as string)  
 } 
 我相信我对索引有一个问题，但显然我一般都很无能为力，所以无论你提供什么样的帮助都会非常感激。 
 谢谢！！ 
 编辑：为了更清晰，我找到了一种更好地解释自己的方法。 







 
	

		      	
 这是一个可以帮助您解决问题的示例 
  public ActionResult Index(string sortOrder) { ViewBag.NameSortParm = String.IsNullOrEmpty(sortOrder) ? "Name_desc" : ""; ViewBag.DateSortParm = sortOrder == "Date" ? "Date_desc" : "Date"; var students = from s in db.Students select s; switch (sortOrder) { case "Name_desc": students = students.OrderByDescending(s => s.LastName); break; case "Date": students = students.OrderBy(s => s.EnrollmentDate); break; case "Date_desc": students = students.OrderByDescending(s => s.EnrollmentDate); break; default: students = students.OrderBy(s => s.LastName); break; } return View(students.ToList()); } 
 排序示例 
  ViewBag.NameSortParm = String.IsNullOrEmpty(sortOrder) ? "name_desc" : ""; ViewBag.DateSortParm = sortOrder == "Date" ? "date_desc" : "Date"; 
 以下是要显示的视图的示例 
 
 @Html.ActionLink("Create New", "Create") 
 
 
 
 @Html.ActionLink("AppID", "Index", new { sortOrder = ViewBag.IDSortParm }) 
 
 @Html.ActionLink("ApplicationName", "Index", new { sortOrder = ViewBag.NameSortParm }) 
 
 @Html.ActionLink("DatabaseID", "Index", new { sortOrder = ViewBag.ADSortParm }) 
 
 @Html.ActionLink("DatabaseName", "Index", new { sortOrder = ViewBag.Name2SortParm }) 
 





	
 @foreach (var item in Model) {
 
 
 @Html.ActionLink("Last Name", "Index", new { sortOrder = ViewBag.NameSortParm }) 
 
First Name 
 
 @Html.ActionLink("Enrollment Date", "Index", new { sortOrder = ViewBag.DateSortParm }) 
 
 
 

 public ViewResult Index(string sortOrder, string searchString) { ViewBag.NameSortParm = String.IsNullOrEmpty(sortOrder) ? "name_desc" : ""; ViewBag.DateSortParm = sortOrder == "Date" ? "date_desc" : "Date"; var students = from s in db.Students select s; if (!String.IsNullOrEmpty(searchString)) { students = students.Where(s => s.LastName.Contains(searchString) || s.FirstMidName.Contains(searchString)); } switch (sortOrder) { case "name_desc": students = students.OrderByDescending(s => s.LastName); break; case "Date": students = students.OrderBy(s => s.EnrollmentDate); break; case "date_desc": students = students.OrderByDescending(s => s.EnrollmentDate); break; default: students = students.OrderBy(s => s.LastName); break; } return View(students.ToList()); } 

 
 @Html.ActionLink("Create New", "Create") 
 @using (Html.BeginForm()) { 
 Find by name: @Html.TextBox("SearchString") 
 }