如何在ASP.NET MVC中的控制器中返回多个选定的值

Question

I have a controller which I want it to return only two selected rows to a view. It looks like this:

public ActionResult Details(int sourceId, int targetId)
    {
        ConfigurationItem sourceItem = db.ConfigurationItemSet.Find(sourceId);
        ConfigurationItem targetItem = db.ConfigurationItemSet.Find(targetId);

        return View();
    }

What should I put in a "return"? I want to make a view with only two specific rows selected by Id from the table and put it in two separate grids.

Answer 1

you can do it like

Action

public ActionResult Details(int sourceId, int targetId)
{
    var sourceItem  = new list<ConfigurationItem>(); 

    ConfigurationItem sourceItem1 = db.ConfigurationItemSet.Find(sourceId);
    ConfigurationItem targetItem2 = db.ConfigurationItemSet.Find(targetId);
    sourceItem.add(sourceItem1);
    sourceItem.add(sourceItem2);
    return View(sourceItem.AsEnumerable());
}

View

@model IEnumerable<ConfigurationItem>

Answer 2

You should use a ViewModel (thats the recommended way in MVC).

The ViewModel

public class DetailsViewModel
{
    public ConfigurationItem TargetItem { get; set; }
    public ConfigurationItem SourceItem { get; set; }
}

The Action Method

public ActionResult Details(int sourceId, int targetId)
{
    var viewModel = new DetailsViewModel();
    viewModel.TargetItem  = db.ConfigurationItemSet.Find(targetId);
    viewModel.SourceItem = db.ConfigurationItemSet.Find(sourceId);
    return View(viewModel);
}

The View (Razor)

@model DetailsViewModel

// use Model.TargetItem  and Model.SourceItem 

Answer 3

If you are not using any Model then try using ViewBag.sourceItem to pass data from Controller to your View

ViewBag.sourceItem = db.ConfigurationItemSet.Find(sourceId);
ViewBag.targetItem = db.ConfigurationItemSet.Find(targetId);