I want to send a list of names contained in a Database using asp.net
These are my two objects:
public class Shop
{
public int ID { get; set; }
public string Country { get; set; }
public List<Item> Items{ get; set; }
}
public class Item
{
public int ID { get; set; }
public string Name { get; set; }
}
I want to set a get controller in order to retrieve a list of items.
I did something like this:
public IEnumerable<Item> Get(int id)
{
var items= new List<Item>();
var shop= new Shop();
using (var systemDB = new ShopsDB())
{
it = systemDB.Shops.Where(s => s.ID == id).FirstOrDefault<Shop>();
items = it.Items;
}
return items;
}
This return <ArrayOfItem i:nil="true"/>.
I want to get the complete list of Items for one shop (e.g. shop with ID=1)
This will return you the list
using (var systemDB = new ShopsDB())
{
lab = systemDB.Shops.Where(s => s.ID == id).ToList();
items = lab.Items;
}
I solved modifying the Item object:
public class Shop
{
public int ID { get; set; }
public string Country { get; set; }
public List<Item> Items{ get; set; }
}
public class Item
{
public int ID { get; set; }
public string Name { get; set; }
public int ShopID { get; set; }
}
And set a query to select the ShopID
Related
I am new to programming. I want to list the categories whose nested number is not clear. As a result of my research, I decided that I could do it in a single Database table. I thought I should use a recursive structure for this and decided to use partialview for it.
DB Entity
public class Categories {
public int ID { get; set; }
public int ParentCatID { get; set; }
public string CategoryName { get; set; }
public string Instruction { get; set; }
}
PartialView I am trying to write
Can I do it without using PartialView?
I want to achieve this output
class
public class Categories
{
public int ID { get; set; }
public int? ParentCatID { get; set; }
public Categories ParentCat { get; set; }
public string CategoryName { get; set; }
public string Instruction { get; set; }
public IList<Categories> Children { get; protected set; } = new List<Categories>();
}
ViewModel
public class CategoriesViewModel
{
public CategoriesViewModel()
{
ChildItems = new List<CategoriesViewModel>();
}
public long ID { get; set; }
public string CategoryName { get; set; }
public string Instruction { get; set; }
public CategoriesViewModel ParentCatID { get; set; }
public IList<CategoriesViewModel> ChildItems { get; set; }
public void AddChildItem(CategoriesViewModel childItem)
{
childItem.ParentCatID = this;
ChildItems.Add(childItem);
}
}
controller
public IActionResult List()
{
var categories = _context.ToList(); // example
var categoryItems = new List<CategoriesViewModel>();
var topCategories = categories.Where(x => !x.ParentCatID.HasValue);
foreach (var category in topCategories)
{
var categoryMenuItem = Map(category);
categoryItems.Add(categoryMenuItem);
}
return View(categoryItems);
}
private CategoriesViewModel Map(Categories category)
{
var categoryMenuItem = new CategoriesViewModel
{
ID = category.ID,
CategoryName = category.CategoryName,
Instruction = category.Instruction
};
var childCategories = category.Children;
foreach (var childCategory in childCategories)
{
var childCategoryMenuItem = Map(childCategory);
categoryMenuItem.AddChildItem(childCategoryMenuItem);
}
return categoryMenuItem;
}
view
#model IEnumerable<CategoriesViewModel>
#foreach (var item in Model)
{
if (item.ChildItems.Any())
{
<li>
<span>#item.CategoryName</span>
<ul class="dropdown">
<li>
#foreach (var childItem in item.ChildItems)
{
<span>#childItem.CategoryName</span>
}
</li>
</ul>
</li>
}
else
{
<li><span>#item.CategoryName</span></li>
}
}
I have this code -
var add = (from h in db.Hotels
where h.Address.Contains(hotels.Address)
select h).Take(2);
ViewBag.Related = add;
Now, in the View, I want to display the images, so I'm using this code -
<img src="~/img/#item.FirstOrDefault().Image" />
This is giving me this error -
'System.Data.Entity.DynamicProxies.Hotels_D1EE6FD2E11BD1D9436F26FEA6336CFE76F33C59111E2ABC7C1BBE456FF61C23' does not contain a definition for 'FirstOrDefault'
I've tried using 'joins' also but same error occurs. Please help me out in this! :(
My Hotels class -
public class Hotels
{
[ScaffoldColumn(false)]
public int Id { get; set; }
public string Name { get; set; }
public string Description { get; set; }
public string Address { get; set; }
[StringLength(8)]
public string PinCode { get; set; }
public string Phone { get; set; }
public string Email { get; set; }
public string FilledBy { get; set; }
public DateTime DateAdded { get; set; }
//public int ImageId { get; set; }
public int TotalRooms { get; set; }
public bool Available { get; set; }
public virtual ICollection <Rooms> Rooms { get; set; }
public virtual ICollection <Images> Images { get; set; }
public virtual ICollection<Ameneties> Ameneties { get; set; }
public virtual ICollection <Bookings> Bookings { get; set; }
public virtual ICollection<NearByLocations> Nearby { get; set; }
public virtual ICollection<Ratings> Ratings { get; set; }
public virtual ICollection<RoomType> RoomTypes { get; set; }
public virtual ICollection<CustomerReviews> Reviews { get; set; }
public virtual ICollection<HotelRules> HotelRules { get; set; }
}
My Images class -
public class Images
{
[ScaffoldColumn(false)]
public int id { get; set; }
public string Image { get; set; }
public int? HotelId { get; set; }
public virtual Hotels Hotels { get; set; }
//public ICollection<Hotels> Hotels { get; set; }
}
I have used this type of collections...
This is my Details View Controller code -
public ActionResult Details(int? id)
{
IEnumerable<Images> galleries = (from gallery in db.Images
where gallery.Hotels.Id == id
select gallery);
ViewBag.Images = galleries;
ViewBag.ImgCount = galleries.Count();
IEnumerable<Ameneties> ameneties = (from a in db.Ameneties
where a.Hotels.Id == id
select a);
ViewBag.Ameneties = ameneties;
IQueryable<Rooms> rooms = (from room in db.Rooms
where room.Hotels.Id == id
select room);
var ratings = (from rating in db.Ratings
where rating.Hotels.Id == id
select rating.Points);
ViewBag.Ratings = ratings;
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Hotels hotels = db.Hotels.Find(id);
if (hotels == null)
{
return HttpNotFound();
}
var add = db.Hotels.Include("Images").Where(h => h.Address.Contains(hotels.Address))
.Select(h => h)
.Take(2)
.ToList();
var model = new MyViewModel { Hotels = add };
ViewBag.Reviews = hotels.Reviews;
ViewBag.Ratings = hotels.Ratings;
ViewBag.NearBy = hotels.Nearby;
ViewBag.RoomTypes = hotels.RoomTypes;
ViewBag.Rules = hotels.HotelRules;
return View(hotels);
}
Could you add ToList() at the end of the query?
var add = (from h in db.Hotels
where h.Address.Contains(hotels.Address)
select h).Take(2)
.ToList();
ViewBag.Related = add;
Then you could call item.Images.FirstOrDefault()?.Image.
#foreach (var item in ViewBag.Related)
{
<img src="~/img/#item.Images.FirstOrDefault().Image" />
}
If it still doesn't work, you will need to explicitly load Image when you query Hotel. For example,
public IActionResult Index()
{
var add = db.Hotels
.Include("Images")
.Where(h => h.Address.Contains(hotels.Address))
.Select(h => h)
.Take(2)
.ToList();
var model = new MyViewModel { Hotels = add };
return View(model);
}
View
#model YourNameSpace.Models.MyViewModel
#foreach (var item in Model.Hotels)
{
<img src="~/img/#item.Images.FirstOrDefault().Image" />
}
Model
public class MyViewModel
{
public List<Hotels> Hotels { get; set; }
}
This is an ASP.NET MVC4 project with Entity Framework.
I need to use 2 tables in single view
I have 2 tables in my database (Budgets and Products).
My Models
Budget.cs
public class Budget
{
public int Id { get; set; }
public string Title { get; set; }
public ICollection<Product> Products { get; set; }
}
Product.cs
public class Product
{
public int Id { get; set; }
public string Title { get; set; }
public decimal Value { get; set; }
public int BudgetId { get; set; }
}
BpDb
public class BpDb:DbContext
{
public DbSet<Budget> Budgets { get; set; }
public DbSet<Product> Products { get; set; }
}
MasterBP
public class MasterBP
{
public int Id { get; set; }
public string Title { get; set; }
public List<Product> ProdName { get; set; }
public int CountOfValues { get; set; }
}
I need something about Controller to get ProdName (Title from table products)
public class HomeController : Controller
{
BpDb _db = new BpDb();
public ActionResult Index()
{
var model=_db.Budgets
.Select(r=>new MasterBP
{
Id = r.Id,
Title = r.Title,
ProdName = r.Products.Where(s => s.BudgetId == r.Id).ToList(),
CountOfValues = r.Products.Count()
});
return View(model);
}
}
I need a way to get a list of products Title when the BudgetId = ID (1 Budget can have more than 1 Products)
And my Index is like:
#model IEnumerable<MvcGg.Models.MasterBP>
#foreach (var item in Model)
{
<div>
<h4>#item.Title</h4>
#foreach (var product in item.ProdName)
{
#(product.Title.ToString());
}
Values:#item.CountOfValues
</div>
}
It sounds like (correct me if I am wrong) you want to access two sets of entities in your view model?
Then something along these lines will do:
public class BudgetsViewModel
{
public IEnumerable<MasterBP> MasterBps { get;set; }
public IEnumerable<Product> Products { get;set;}
}
And then you just retrieve all the data and populate the viewmodel and pass it down.
...
var budgets =_db.Budgets
.Select(r=>new MasterBP
{
Id = r.Id,
Title = r.Title,
ProdName = r.Products.Where(s => s.BudgetId == r.Id).ToList(),
CountOfValues = r.Products.Count()
});
var model = new BudgetsViewModel()
{
MasterBps = budgets
//Products here
}
return View(model);
...
However it would be better if you made some form of service layer to handle the retrieving on entities and the mapping to view models instead of having all this logic in your controller.
finally this solve my problem,
Model:
MasterBP
public class MasterBP
{
public int Id { get; set; }
public string Title { get; set; }
public IEnumerable<Product> ProdName { get; set; }
public int CountOfValues { get; set; }
}
I replaced List<> with IEnumerable<>
Controller:
public ActionResult Index()
{
var model=_db.Budgets
.Select(r=>new MasterBP
{
Id = r.Id,
Title = r.Title,
ProdName = r.Products.Where(s => s.BudgetId == r.Id).AsEnumerable(),
CountOfValues = r.Products.Count()
});
return View(model);
}
In addition i have change ToList() in AsEnumerable() and now i can see my result using this
View:
Index
#foreach (var item in Model)
{
<div>
#item.Title
<ul>
#foreach (var prod in item.ProdName)
{
<li>#prod.Title</li>
}
</ul>
<hr />
</div>
}
I have been trying to get data from the table I have joined to the main user table, the second table is to hold images. My current code posted below, only return the ImageID from the table when I want to be retrieving the ImagePath field, just to note this is a separate table as the user can add many images.
These are the models:
[Table("accountInfo")] // Table name
public class accountInfo
{
[Key]
public int AccountID { get; set; }
public int UserId { get; set; }
public int UserIdent { get; set; }
public string LastName { get; set; }
public string FirstName { get; set; }
public virtual ICollection<UserImages > UserImages { get; set; }
}
[Table("UserImages")] // Table name
public class UserImages
{
[Key]
public int ImageID { get; set; }
public int AccountID { get; set; }
public string ImagePath { get; set; }
public string ImageDesc { get; set; }
public int ProfileImage { get; set; }
}
Controller:
public ActionResult Index()
{
int id = (int)WebSecurity.CurrentUserId;
var users = db.AccountInformation.Include(c => c.UserImages).Where(c => c.UserId == id);
return View(users.ToList());
}
I am assuming I have gone wrong in the models set up. Can anyone help?
var a = db.AccountInformation.Include(c => c.UserImages.Select(x => x.AccountId)).Where(c => c.UserId == id);
In a ASP.NET MVC3 Razor project I have 2 Models
public class Post
{
public int Id { get; set; }
public string Title { get; set; }
public string Contents { get; set; }
public int Author { get; set; }
}
public class Author
{
public int Id { get; set; }
public string Name { get; set; }
public string Email { get; set; }
}
Post.Author field links to Author.Id field
In a view, I need to display list of
Post.Title
Post.Contents
Author.Name
How to display the information joining (from) both models?
Note : I guess I need to use a ViewModel and bind the view with IEnumerable List, but I have no idea how to select the data from both models
You can create a viewmodel which will have ONLY properties which u want to be displayed on view
public class PostViewModel
{
public int Id { get; set; }
public string Title { get; set; }
public string Contents { get; set; }
public string AuthorName { get; set; }
}
You populate this viewmodel with your data in your controller action taking necessary joins
public ActionResult GetAuthorInfor()
{
var query = //context.Post join with context.Author
Select new PostViewModel()
{
Id = post.id,
Title = post.title,
Contents = post.contents,
AuthorName = author.authorname
}
return view(query.Single());
}
and create a typed view to render this model.
Model Post.cs:
public class Post
{
public int Id { get; set; }
public string Title { get; set; }
public string Contents { get; set; }
public int AuthorID { get; set; }
public virtual Author Author { get; set; }
}
Model Author.cs :
public class Author
{
public int Id { get; set; }
public string Name { get; set; }
public string Email { get; set; }
public virtual ICollection<Post> Posts { get; set; }
}
DBContext Class:
public class SampleDB : DbContext
{
public DbSet<Author> Authors{ get; set; }
public DbSet<Post> Posts{ get; set; }
}
I.Way(using direkt view)
you can use on View like this :
Samp.Models.SampleDB dbPosts = new Samp.Models.SampleDB();
foreach (var post in dbPosts.Posts.ToList())
{
string post_Title = post.title;
string post_Contents = post.Contents;
string author_Name = post.Author.Name;
}
II.Way (Using via Controller) -Recommended-
you can use on Controller like this :
Samp.Models.SampleDB db = new Samp.Models.SampleDB();
public ActionResult Index()
{
return View(db.Posts.ToList());
}
Using this on View:
#model IEnumerable<Samp.Models.Post>
foreach (var post in Model.Posts.ToList())
{
string post_Title = post.title;
string post_Contents = post.Contents;
string author_Name = post.Author.Name;
}