I have 2 Objects, User and Menu, I want to loop into User.Menu to creat links like this:
#for (int i = 0; i < _Usuario.Menu.Count(); i++)
{
#Html.ActionLink( Convert.ToString(_Usuario.Menu.LinkName), Convert.ToString(_Usuario.Menu.ActionName), Convert.ToString(_Usuario.Menu.ControllerName))
}
But i dont have a counter for User.Menu, how could this be done ?
public class User
{
public Int64 Id { get; set; }
public string Name { get; set; }
public string Email { get; set; }
public DateTime LoginTime { get; set; }
public Menu Menu { get; set; }
public List<string> Objects { get; set; }
public List<string> Controllers { get; set; }
//public List<string> Roles { get; set; }
public User()
{
Objects = new List<string>();
Controllers = new List<string>();
}
}
public class Menu
{
public List<string> LinkName { get; set; }
public List<string> ActionName { get; set; }
public List<string> ControllerName { get; set; }
public Menu()
{
LinkName = new List<string>();
ActionName = new List<string>();
ControllerName = new List<string>();
}
}
Your menu class doesn't make much sense as it implies that the link, action, and controller names are three separate sets of items. In reality there is a single set of menu items each consisting of a link, action, and controller. So this means you can rewrite Menu as:
public class Menu
{
public List<MenuItem> Items { get; set; }
public Menu()
{
Items = new List<MenuItem>();
}
}
public class MenuItem
{
public string LinkName { get; set; }
public string ActionName { get; set; }
public string ControllerName { get; set; }
}
You'll have to rewrite your code that sets up menu, but that should be easy enough.
Then it is easy to loop through in your view.
#for (int i = 0; i < _Usuario.Menu.Items.Count(); i++)
{
#Html.ActionLink(_Usuario.Menu.Items[i].LinkName, _Usuario.Menu.Items[i].ActionName, _Usuario.Menu.Items[i].ControllerName)
}
An alternative way is to create a display template for the model and use #Html.DisplayFor(). This way you do not need to worry about the loop as it will do it for you. This is a good way to keep your razor view nice and clean.
Example
public class MenuItem
{
public string LinkName { get; set; }
public string ActionName { get; set; }
public string ControllerName { get; set; }
}
Display template (menuitem.cshtml):
#model MenuItem
#Html.ActionLink(Model.LinkName, Model.ActionName, Model.ControllerName)
View:
#model IEnumerable<MenuItem>
#Html.DisplayForModel()
Related
How do I populate a navigation property with specific value?
I have 3 models, Game, UserTeam, User, defined below. I have a razor view which uses the model IEnumerable. This view loops over the Games, and within that loop, loops over the UserTeams. So far, so good.
Within the UserTeam loop, I want to access the User properties, but they are null. How do I populate the User navigation property for each UserTeam object? Do I need a constructor with a parameter in the UserTeam model?
Models
public class Game
{
public Game()
{
UserTeams = new HashSet<UserTeam>();
}
public int Id { get; set; }
public int CreatorId { get; set; }
public string Name { get; set; }
public int CurrentOrderPosition { get; set; }
public virtual UserProfile Creator { get; set; }
public virtual ICollection<UserTeam> UserTeams { get; set; }
}
public class UserTeam
{
public UserTeam()
{
User = new UserProfile();
}
public int Id { get; set; }
public int UserId { get; set; }
public int GameId { get; set; }
public int OrderPosition { get; set; }
public virtual UserProfile User { get; set; }
public virtual Game Game { get; set; }
public virtual IList<UserTeam_Player> UserTeam_Players { get; set; }
}
public class UserProfile
{
[Key]
[DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
public int UserId { get; set; }
public string UserName { get; set; }
public string test { get; set; }
public UserProfile()
{
UserTeams = new HashSet<UserTeam>();
}
public virtual ICollection<UserTeam> UserTeams { get; set; }
[ForeignKey("CreatorId")]
public virtual ICollection<Game> Games { get; set; }
}
Loop in my Razor view (Model is IEnumerable)
#foreach (var item in Model) {
#foreach (var userteam in item.UserTeams) {
#Html.ActionLink("Join game as"+userteam.User.UserName, "JoinGame", new { gameid = item.Id, userid=userteam.UserId })
}
}
Method in my repository that returns the Games
public IEnumerable<Game> GetAllGames()
{
using (DataContext)
{
var gm = DataContext.Games.Include("UserTeams").ToList();
return gm;
}
}
You would need to include this in your repository method. If you are using eager loading then it would be something like
var gm = DataContext.Games
.Include(x => x.UserTeams)
.Include(x => x.UserTeams.Select(y => y.User))
.ToList();
I have not done this without using LINQ for my queries, but I assume it would be something like:
var gm = DataContext.Games.Include("UserTeams.User").ToList();
Hopefully this helps you out
Let's say I have a model like this (simplified from the original):
public class Location
{
public int ID { get; set; }
public string BinNumber { get; set; }
}
public class Item
{
public int ID { get; set; }
public string Description { get; set; }
public virtual Location Bin { get; set; }
}
public class LineOnPickList
{
public int ID { get; set; }
public virtual Item Item { get; set; }
}
The usual thing to do here on the LineOfPickList Create view would be to have a dropdownlist that listed all the Item Descriptions and put the selected item in the newly created LineOnPickList record when Create was clicked.
What I need to do however is show a dropdownlist of Location BinNumbers, yet still have the Item associated with that Location in the newly created LineOnPickList record.
How would that be done?
Define a view model for your drop down
public class ItemViewModel
{
public int ID { get; set; }
public string BinNumber { get; set; }
}
Then build the drop down list data in your controller action as follows
public class CreateLineOnPickListViewModel
{
public int ItemId { get; set; }
public IEnumerable<ItemViewModel> Items { get; set; }
}
public ActionResult Create()
{
var model = new CreateLineOnPickListViewModel();
model.Items = db.Items
.Select(i => new ItemViewModel { ID = i.ID, BinNumber = i.Bin.BinNumber });
return View(model);
}
Then in your view
#model CreateLineOnPickListViewModel
#Html.DropDownListFor(m => m.ItemId, new SelectList(Model.Items, "ID", "BinNumber"), "-")
Then your post action method in your controller would look like this
public ActionResult Create(CreateLineOnPickListViewModel model)
{
var item = new Item { ID = model.ItemID };
db.Items.Attach(item);
var lineOnPickList = new LineOnPickList { Item = item };
db.SaveChanges();
return View(model);
}
Should T be a for example Customer or CustomerViewModel ?
The annotations bound to Mvc namespace are on the ListViewModel so actually I could pass the Customer object. What do you think?
public class ListViewModel<T>
{
[Required(ErrorMessage="No item selected.")]
public int[] SelectedIds { get; set; }
public IEnumerable<T> DisplayList { get; set; }
}
UPDATE
[HttpGet]
public ActionResult Open()
{
IEnumerable<Testplan> testplans = _testplanDataProvider.GetTestplans();
OpenTestplanListViewModel viewModel = new OpenTestplanListViewModel(testplans);
return PartialView(viewModel);
}
public class OpenTestplanListViewModel
{
public OpenTestplanListViewModel(IEnumerable<Testplan> testplans)
{
var testplanViewModels = testplans.Select(t => new TestplanViewModel
{
Name = string.Format("{0}-{1}-{2}-{3}", t.Release.Name, t.Template.Name, t.CreatedAt, t.CreatedBy),
TestplanId = t.TestplanId,
});
DisplayList = testplanViewModels;
}
[Required(ErrorMessage = "No item selected.")]
public int[] SelectedIds { get; set; }
public string Name { get; set; }
public IEnumerable<TestplanViewModel> DisplayList { get; private set; }
}
public class TestplanViewModel
{
public int TestplanId { get; set; }
public string Name { get; set; }
}
public class Testplan
{
public int TestplanId { get; set; }
public int TemplateId { get; set; }
public int ReleaseId { get; set; }
public string CreatedBy { get; set; }
public DateTime CreatedAt { get; set; }
public Template Template { get; set; }
public Release Release { get; set; }
}
T should ideally be a view model. Having a view model referencing domain models is some kind of a hybrid view model, not a real one. But if you think that in this specific case the domain model will be exactly the same as the view model then you could keep it as well.
I am creating a simple todo application which has two entities, tasks and categories.
To create a task, choosing a category is a must. For this, I figured I would need a ViewModel.
Here is the Task entity
public class Task
{
public int taskId { get; set; }
public int categoryId { get; set; }
public string taskName { get; set; }
public bool isCompleted { get; set; }
public DateTime creationDate { get; set; }
public DateTime completionDate { get; set; }
public string remarks { get; set; }
public string completionRemarks { get; set; }
}
Here is the Category entity
public class Category
{
public int categoryId { get; set; }
public string categoryName { get; set; }
}
How can I design a TaskCategoryViewModel so that I can bind the category in the CreateTask view?
Edit: I am using classic ADO.NET instead of Entity Framework or LINQ to SQL.
Kishor,
the best bet is have model that hods definition for your task and for category (all in one)
here is how everything hangs together.
where
IEnumerable<SelectListItem> Categories
is used for creating drop down list which is ready to use
<%= Html.DropDownListFor(model=>model.NewTask.categoryId, Model.Categories) %>
this will create you nice dropdown list
private IEnumerable<Category> GetCategories
{
get
{
List<Category> categories = new List<Category>
{
new Category() {categoryId = 1, categoryName = "test1"},
new Category() {categoryId = 2, categoryName = "category2"}
};
return categories;
}
}
[AcceptVerbs(HttpVerbs.Get)]
public ActionResult CreateTask()
{
TaskModel taskModel = new TaskModel();
LoadCategoriesForModel(taskModel);
return View(taskModel);
}
private void LoadCategoriesForModel(TaskModel taskModel)
{
taskModel.Categories =
GetCategories.Select(
x =>
new SelectListItem()
{Text = x.categoryName, Value = x.categoryId.ToString(CultureInfo.InvariantCulture)});
}
public ActionResult CreateTask(TaskModel taskModel)
{
if (ModelState.IsValid)
{
// do your logic for saving
return RedirectToAction("Index");
}
else
{
LoadCategoriesForModel(taskModel);
return View(taskModel);
}
}
/// <summary>
/// your model for creation
/// </summary>
public class TaskModel
{
public Task NewTask { get; set; }
public IEnumerable<SelectListItem> Categories { get; set; }
}
/// <summary>
/// Task
/// </summary>
public class Task
{
public int taskId { get; set; }
public int categoryId { get; set; }
public string taskName { get; set; }
public bool isCompleted { get; set; }
public DateTime creationDate { get; set; }
public DateTime completionDate { get; set; }
public string remarks { get; set; }
public string completionRemarks { get; set; }
}
/// <summary>
/// Category
/// </summary>
public class Category
{
public int categoryId { get; set; }
public string categoryName { get; set; }
}
In the TaskViewModel (I would prefer naming it CreateTaskViewModel) create property for categories select list
public IEnumerable<SelectListItem> CategoriesSelectList;
In controller, bind that property before returning view (note that this also should be done in post handler, when ModelState is invalid)
public ViewResult Create()
{
CreateTaskViewModel model = new CreateTaskViewModel();
model.CategoriesSelectList = _repository.AllCategories().Select(x=> new SelectListItem(){ Text = x.CategoryName, Value = x.CategoryId.ToString();}
}
And finally, in the view
Html.DropDownListFor(model => model.CategoryId, Model.CategoriesSelectList)
Edit:
In your code, _repository.AllCategories() should be replaced by your data access code, that returns object having type IEnumerable<Category>. It actually does not matter which data access technology you use. And do not forget to add the using System.Linq; statement to your controller file, if it's missing.
I have the following entity model:
public class Project
{
[Key]
public int ProjectID { get; set; }
public string Title { get; set; }
public string Slug { get; set; }
public string Content { get; set; }
public string Category { get; set; }
public string Client { get; set; }
public int Year { get; set; }
// more attributes here...
}
I would like to prepare a view model (specific for my view). Here is the view model:
public class ProjectListViewModel
{
public IEnumerable<ProjectInfos> ProjectList { get; set; }
public PagingInfo Paging { get; set; }
public class ProjectInfos
{
public string Title { get; set; }
public string Slug { get; set; }
public string Content { get; set; }
public string Category { get; set; }
public string Client { get; set; }
public int Year { get; set; }
}
public class PagingInfo
{
public int TotalItems { get; set; }
public int ItemsPerPage { get; set; }
public int CurrentPage { get; set; }
public int TotalPages { get; set; }
}
}
In my controller, I would like to prepare the view model by filling it with 2 different objects:
List of projects
Paging information
Here is my controller:
public ViewResult List(string category, int page = 1)
{
IEnumerable<Project> projectList = m_Business.GetProjects(category, page, 10);
PagingInfo pagingInfo = m_Business.GetPagingInfo(category, page, 10);
// Here I need to map !!
ProjectListViewModel viewModel = .....
return View(viewModel);
}
So how can I proceed in my controller? I know we can use automapper to map from one object to another but here I need to map from two objects into a single one.
Thanks.
You can extend AutoMapper to map multiple objects.
Here is a blog which provides some sample cope.
Then you can use code like this:
var personViewModel = EntityMapper.Map<PersonViewModel>(person, address, comment);