I am using MVC4 for the first time. I got some basics of its logic.
I want display a drop down list with some dynamic contents (data are from database) in it.
How can I use model, view and controller to implement this? Please help me with sample code..
This should be a good start for you.
Models\FooModel.cs
public class FooModel
{
public string Key { get; set; }
public string Text { get; set; }
}
Models\FooModelList.cs
public class FooModelList
{
public int SelectedFooId { get; set; }
public IEnumerable<FooModel> Foos { get; set; }
}
Controllers\HomeController.cs
public class HomeController : Controller
{
public ActionResult Index()
{
var model = new FooListModel
{
SelectedFooId = 0,
Foos = GetFooModels()
};
return View(model);
}
[HttpPost]
public ActionResult Index(FooListModel model)
{
if (ModelState.IsValid)
{
// do something with model
return RedirectToAction("View", "Foo", new { Id = model.Key });
}
// somethings wrong..
model.Foos = GetFooModels();
return View(model);
}
private IEnumerable<FooModel> GetFooModels()
{
var dbContext = new FooDbContext();
var fooModels = dbContext.Foos.Select(x =>
new FooModel
{
Key = x.Key,
Value = x.Value
};
return fooModels.ToList();
}
}
Views\Home\Index.cshtml
@model MvcApp.Models.FooListModel
@{
var fooList = new SelectList(Model.Foos, "Key", "Value");
}
@using (Html.BeginForm("DealSummaryComparison", "Reporting", FormMethod.Post)) {
<div>
Foos: @Html.DropDownListFor(x => x.SelectedFooId, fooList)
</div>
<div>
<input type="submit" value="Submit" />
</div>
}
You may refer this post for details. Since you have just got a basic ideas on MVC, the post also has a basic example of adding dropdownlist in MVC using the sample NorthWind databases.
