C# Asp Mvc如何为viewmodel分配联接查询值?
我正在处理一个Asp.NETMVCWeb应用程序,我想为viewModel分配一个联接的linq查询值 视图模型: 我的视图本身使用多模型,我创建了一个类来定义所有模型并在控制器中使用它: 多模型类: 但在联接查询中,会发生以下错误: 无法将类型“System.Collection.Generic.List”隐式转换为“System.Collections.Generic.List” 将选择更改为上述代码。当模型需要列表类型时,您的选择是创建一个新的匿名类型 将选择更改为上述代码。当模型需要列表类型时,您的选择是创建一个新的匿名类型C# Asp Mvc如何为viewmodel分配联接查询值?,c#,jquery,asp.net-mvc,linq,type-conversion,C#,Jquery,Asp.net Mvc,Linq,Type Conversion,我正在处理一个Asp.NETMVCWeb应用程序,我想为viewModel分配一个联接的linq查询值 视图模型: 我的视图本身使用多模型,我创建了一个类来定义所有模型并在控制器中使用它: 多模型类: 但在联接查询中,会发生以下错误: 无法将类型“System.Collection.Generic.List”隐式转换为“System.Collections.Generic.List” 将选择更改为上述代码。当模型需要列表类型时,您的选择是创建一个新的匿名类型 将选择更改为上述代码。当模型需要列表
public class BookDetails
{
public int BookId { get; set; }
[Display(Name = "Book Name :")]
public string BookName { get; set; }
[Display(Name = "BookDescription :")]
public string BookDescription { get; set; }
public int AuthorId { get; set; }
public int BookGroupId { get; set; }
[Display(Name = "Author Name :")]
public string AuthorName { get; set; }
[Display(Name = "Book Group Name :")]
public string BookGroupName { get; set; }
}
public class MultiModels
{
public List<ApplicationUser> UserListed { get; set; }
public List<News> LastNews { get; set; }
public List<BookDetails> bookdetails { get; set; }
}
public IActionResult BookDetails(int id)
{
if (id == 0)
{
return RedirectToAction("NotFounds");
}
MultiModels model = new MultiModels();
model.UserListed = (from u in _userManager.Users orderby u.Id descending select u).Take(10).ToList();
model.LastNews = (from n in _context.news orderby n.NewsId descending select n).Take(5).ToList();
////////////////////////////////////////Error location
model.bookdetails = (from b in _context.books
join a in _context.authors on b.AuthorID equals a.AuthorId
join bg in _context.bookgroups on b.BookGroupID equals bg.BookGroupId
where b.BookId == id
select new
{
b.BookId,
b.BookDescription,
b.BookName,
b.AuthorID,
b.BookGroupID,
a.AuthorName,
bg.BookGroupName
}).ToList();
////////////////////////////////////////
return View(model);
}
select new BookDetails
{
BookId = b.BookId,
BookDescription = b.BookDescription,
BookName = b.BookName,
AuthorId = b.AuthorID,
BookGroupId = b.BookGroupID,
AuthorName = a.AuthorName,
BookGroupName = bg.BookGroupName
}).ToList();