MVC5 EF返回数据以查看
[英]MVC5 EF Return data to view
问题描述
I have one table called access linked with FK to user's table , so, a user have a collection of accesses. 
我有一个名为access linked with FK to user's table ，该linked with FK to user's table ，因此，用户具有一组访问权限。
With this, my controller return a list with all accesses. 这样，我的控制器将返回一个包含所有访问权限的列表。
I want to create a dropdown with all users that are on user's table. 我想创建一个包含用户表上所有用户的下拉菜单。
To to that i followed the 1st answer of this question. 为此，我遵循了这个问题的第一个答案。
I'll paste here the code of my controller that return a view do index: 我将在此处粘贴返回视图do索引的控制器代码：
public ActionResult Index(string searchString, string sortOrder)
{
ViewBag.IDSortParm = sortOrder == "ID_asc" ? "ID_desc" : "ID_asc";
ViewBag.EmailSortParm = sortOrder == "Email_asc" ? "Email_desc" : "Email_asc";
ViewBag.DateSortParm = sortOrder == "Date" ? "date_desc" : "Date";
ViewBag.NameSortParm = sortOrder == "Name_asc" ? "Name_desc" : "Name_asc";
var userAccesses = db.UserAccesses.Include(u => u.User);
//UserNamesToList = GetUserNamesList();
/*
var NamesToListQ = userAccesses.Select(x => new SelectListItem
{
Value = x.User.Id,
Text = x.User.Name
});
var NamesToList = new SelectList(NamesToListQ, "Value", "Text");
*/
if (User.IsInRole("Admin"))
{
userAccesses = db.UserAccesses.Include(u => u.User);
switch (sortOrder)
{
case "Date":
userAccesses = db.UserAccesses.Include(u => u.User).OrderBy(s => s.Access);
break;
case "date_desc":
userAccesses = db.UserAccesses.Include(u => u.User).OrderByDescending(s => s.Access);
break;
case "Email_desc":
userAccesses = db.UserAccesses.Include(u => u.User).OrderByDescending(s => s.User.Email);
break;
case "Email_asc":
userAccesses = db.UserAccesses.Include(u => u.User).OrderBy(s => s.User.Email);
break;
case "ID_desc":
userAccesses = db.UserAccesses.Include(u => u.User).OrderByDescending(s => s.UserAcessID);
break;
case "ID_asc":
userAccesses = db.UserAccesses.Include(u => u.User).OrderBy(s => s.UserAcessID);
break;
case "Name_asc":
userAccesses = db.UserAccesses.Include(u => u.User).OrderBy(s => s.User.Name);
break;
case "Name_desc":
userAccesses = db.UserAccesses.Include(u => u.User).OrderBy(s => s.User.Name);
break;
default:
userAccesses = db.UserAccesses.Include(u => u.User).OrderBy(s => s.UserAcessID);
break;
}
if (!String.IsNullOrEmpty(searchString))
{
userAccesses = db.UserAccesses.Include(u => u.User)
.Where(s => s.User.Email.Contains(searchString) || s.User.Id.Contains(searchString));
switch (sortOrder)
{
case "Date":
userAccesses = db.UserAccesses.Include(u => u.User)
.Where(s => s.User.Email.Contains(searchString) || s.User.Id.Contains(searchString))
.OrderBy(s => s.Access);
break;
case "date_desc":
userAccesses = db.UserAccesses.Include(u => u.User)
.Where(s => s.User.Email.Contains(searchString) || s.User.Id.Contains(searchString))
.OrderByDescending(s => s.Access);
break;
case "Email_desc":
userAccesses = db.UserAccesses.Include(u => u.User)
.Where(s => s.User.Email.Contains(searchString) || s.User.Id.Contains(searchString))
.OrderByDescending(s => s.User.Email);
break;
case "Email_asc":
userAccesses = db.UserAccesses.Include(u => u.User)
.Where(s => s.User.Email.Contains(searchString) || s.User.Id.Contains(searchString))
.OrderBy(s => s.User.Email);
break;
case "ID_desc":
userAccesses = db.UserAccesses.Include(u => u.User)
.Where(s => s.User.Email.Contains(searchString) || s.User.Id.Contains(searchString))
.OrderByDescending(s => s.UserAcessID);
break;
case "ID_asc":
userAccesses = db.UserAccesses.Include(u => u.User)
.Where(s => s.User.Email.Contains(searchString) || s.User.Id.Contains(searchString))
.OrderBy(s => s.UserAcessID);
break;
case "Name_asc":
userAccesses = db.UserAccesses.Include(u => u.User)
.Where(s => s.User.Email.Contains(searchString) || s.User.Id.Contains(searchString))
.OrderBy(s => s.User.Name);
break;
case "Name_desc":
userAccesses = db.UserAccesses.Include(u => u.User)
.Where(s => s.User.Email.Contains(searchString) || s.User.Id.Contains(searchString))
.OrderByDescending(s => s.User.Name);
break;
default:
userAccesses = db.UserAccesses.Include(u => u.User)
.Where(s => s.User.Email.Contains(searchString) || s.User.Id.Contains(searchString))
.OrderBy(s => s.Access);
break;
}
}
}
else
{
var id = User.Identity.GetUserId();
userAccesses = db.UserAccesses.Where(u => u.UserID == id).Include(i => i.User).Where(u => u.UserID == id);
switch (sortOrder)
{
case "Date":
userAccesses = db.UserAccesses.Where(u => u.UserID == id)
.Include(i => i.User)
.Where(u => u.UserID == id)
.OrderBy(s => s.Access);
break;
case "date_desc":
userAccesses = db.UserAccesses.Where(u => u.UserID == id)
.Include(i => i.User)
.Where(u => u.UserID == id)
.OrderByDescending(s => s.Access);
break;
case "Email_desc":
userAccesses = db.UserAccesses.Where(u => u.UserID == id)
.Include(i => i.User)
.Where(u => u.UserID == id)
.OrderByDescending(s => s.User.Email);
break;
case "Email_asc":
userAccesses = db.UserAccesses.Where(u => u.UserID == id)
.Include(i => i.User)
.Where(u => u.UserID == id)
.OrderBy(s => s.User.Email);
break;
case "ID_desc":
userAccesses = db.UserAccesses.Where(u => u.UserID == id)
.Include(i => i.User)
.Where(u => u.UserID == id)
.OrderByDescending(s => s.UserAcessID);
break;
case "ID_asc":
userAccesses = db.UserAccesses.Where(u => u.UserID == id)
.Include(i => i.User)
.Where(u => u.UserID == id)
.OrderBy(s => s.UserAcessID);
break;
case "Name_asc":
userAccesses = db.UserAccesses.Where(u => u.UserID == id)
.Include(i => i.User)
.Where(u => u.UserID == id)
.OrderBy(s => s.User.Name);
break;
case "Name_desc":
userAccesses = db.UserAccesses.Where(u => u.UserID == id)
.Include(i => i.User)
.Where(u => u.UserID == id)
.OrderBy(s => s.User.Name);
break;
default:
userAccesses = db.UserAccesses.Where(u => u.UserID == id)
.Include(i => i.User)
.Where(u => u.UserID == id)
.OrderBy(s => s.Access);
break;
}
}
return View(userAccesses.ToList());
}
As you can see, in the commented lines i do a query that return a list with user names. 如您所见，在注释行中，我执行了一个查询，该查询返回带有用户名的列表。
My problem is: How I access this list on que view? 我的问题是：如何在查询视图中访问此列表？
I put this on my view: 我认为：
@Html.LabelFor(m => m.SelectedUserRoleId)
@Html.DropDownListFor(m => m.SelectedUserRoleId, Model.UserRoles)
but I can't use "Model.something". 但我不能使用“ Model.something”。
TiA! TiA！
1 个解决方案
解决方案1
1 已采纳 2016-04-21 16:49:00
Make a model class in the Models directory with the properties the view needs: 使用视图所需的属性在Models目录中创建模型类：
public class MyModelOfSomething
{
public IEnumerable<UserAccess> UserAccesses { get; set; }
public SelectList NamesToList { get; set; }
}
Populate that model in the controller: 在控制器中填充该模型：
public ActionResult Index(string searchString, string sortOrder)
{
var model = new MyModelOfSomething();
...
model.NamesToList = new SelectList(NamesToListQ, "Value", "Text");
...
model.UserAccesses = userAccesses.ToList();
return View(model);
}
Now you can access both using @Model.NamesToList and @Model.UserAccesses in the view. 现在，您可以在视图中使用@Model.NamesToList和@Model.UserAccesses进行访问。
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