Question

I need to create a child view that will allow the user to insert related data after selecting a row on the main gridview.

The child view must receive an ID that will indicate which is the parent row.

How can I pass this parameter? ViewBag?

PS: The views and controllers are different and the child view is opened using a Html.ActionLink to the Index action of another controller.

Answer 1

Pass the ID of the parent as a parameter to your action method which invokes the child view.

@Html.ActionLink("Add Related Data","Add",new { @id=364})

Replace 364 with the dynamic value from your view

And in your Child Action,Get the Parent object from the ID and show that in child view. Assuming you have a ViewModel liket his for your child view.

public class ChildDetails
{
  public int ID { set;get;}
  public string Note { set;get;}
  public int ParentID { set;get;}
  public string ParentName { set;get;}
}

Get the Parent details and set the relevant property values in your ViewModel for child view.

public ActionResult Add(int id)
{
  var parent=yourRepositary.Get(id);
  ChildDetails childViewModel=new ChildDetails();
  childViewModel.ParentID=id;
  childViewModel.Name=parent.Name;
  return View(childViewModel);
}

Your Child view will be strongly binded to ChildDetails class

@model ChildDetails

<h2>@Model.ParentName</h2>
@using(Html.BeginForm())
{
  @Html.TextBoxFor(x=>x.Note)
  @Html.HiddenFor(x=>x.ParentId)
  <input type="submit" />
}