Trying to edit an entity with data from dropdowns in MVC...
- by user598352
Hello!
I'm having trouble getting my head around sending multiple models to a view in mvc.
My problem is the following.
Using EF4 I have a table with attributes organised by category.
Couldn't post an image :-(
[Have a table called attributes (AttributeTitle, AttributeName, CategoryID) connected to a table called Category (CategoryTitle).]
What I want to do is be able to edit an attribute entity and have a dropdown of categories to choose from.
I tried to make a custom viewmodel
public class AttributeViewModel
{
public AttributeViewModel()
{
}
public Attribute Attribute { get; set; }
public IQueryable<Category> AllCategories { get; set; }
}
But it just ended up being a mess.
<div class="editor-field">
<%: Html.DropDownList("Category", new SelectList((IEnumerable)Model.AllCategories, "CategoryID", "CategoryName")) %>
</div>
I was getting it back to the controller...
[HttpPost]
public ActionResult Edit(int AttributeID, FormCollection formcollection)
{
var _attribute = ProfileDB.GetAttribute(AttributeID);
int _selcategory = Convert.ToInt32(formcollection["Category"]);
_attribute.CategoryID = (int)_selcategory;
try
{
UpdateModel(_attribute); (<---Error here)
ProfileDB.SaveChanges();
return RedirectToAction("Index");
}
catch (Exception e)
{
return View(_attribute);
}
}
I've debugged the code and my _attribute looks correct and _attribute.CategoryID = (int)_selcategory updates the model, but then I get the error.
Somewhere here I thought that there should be a cleaner way to do this, and that if I could only send two models to the view instead of having to make a custom viewmodel.
To sum it up:
I want to edit my attribute and have a dropdown of all of the available categories.
Any help much appreciated!
