Checkbox not set in ASP.NET MVC 3 - asp.net

Question

I'm trying to initialize my checkbox in controller like the code below, but in the view it's not selected whether it's true or false
controller :
foreach (var item in AssignedUsers)
{
if (dc.App_UserTasks.Any(u => u.UserId == item.UserId && u.TaskId == ProjectTask.Id))
{
Users.Single(u => u.Id == item.Id).IsChecked = true;
}
else
{
Users.Single(u => u.Id == item.Id).IsChecked = false;
}
}
view:
#for (int i = 0; i < Model.Responsibles.Count; i++)
{
#Html.CheckBoxFor(u => u.Responsibles[i].IsChecked)
}
send model from controller to view :
var EPT = new EditProjectTaskModel
{
ProjectId = ProjectTask.ProjectId,
Title = ProjectTask.Title,
ProjectName = ProjectTask.App_Project.ProjectName,
Id = ProjectTask.Id,
Description = ProjectTask.Description,
EstimatedTime = ProjectTask.EstimatedTime,
Status = ProjectTask.Status,
Responsibles = Users.ToList()
};
return PartialView("_EditProjectTask", EPT);

Answer 1

Assuming your User ViewModel looks like this
public class UserViewModel
{
public string Name { set;get;}
public int UserId { set;get;}
public bool IsSelected { set;get;}
}
And you have your main view model has a collection of this UserViewModel
public class EditProjectTaskModel
{
public List<UserViewModel > Responsibles { set; get; }
public EditProjectTaskModel()
{
if(this.Responsibles ==null)
this.Responsibles =new List<UserViewModel >();
}
}
Create an editor template called Responsibles.cshtml with the below content
#model YourNameSpace.UserViewModel
#Html.CheckBoxFor(x => x.IsSelected)
#Html.LabelFor(x => x.IsSelected, Model.Name)
#Html.HiddenFor(x => x.UserId)
Now include that in your main view like this, instead of the loop
#model EditProjectTaskModel
#using (Html.BeginForm())
{
//other elements
#Html.EditorFor(m=>m.Responsibles)
<input type="submit" value="Save" />
}
If you want to get the selected checkboxes on a form submit.
[HttpPost]
public ActionResult Save(EditProjectTaskModel model)
{
List<int> userIDs=new List<int>();
foreach (UserViewModel user in model.Responsibles)
{
if (user.IsSelected)
{
//you can get the selected user id's here
userIDs.Add(user.UserId);
}
}
}