EditorFor() for a List of Complex Type (MVC)

问题:

I'm trying to create an EditorFor() for a List of a Complex Type. Specifically the "Options" below should get displayed in a one multitext input where each option(string) is in a new line. However, I can only display one option in a textbox and not all options....

My View Model and Class:

public class ItemViewModel
{
    public int itemId { get; set; }

    [UIHint("Option")]
    public List<Option> Options { get; set; }
}
public class Option
{
    public string Text { get; set; }
}

My Editor Templates:

EditorTemplates\Item.cshtml

@model ItemViewModel
@Html.EditorFor(model => model.Options)

EditorTemplates\Option.cshtml

//Not sure how to dispay the options here
<textarea rows="4" cols="50">
Display Options
</textarea>

If I update my EditorTemplates to:

EditorTemplates\Item.cshtml

@model ItemViewModel
@Html.EditorFor(model => model.Options[0])

EditorTemplates\Option.cshtml

@Html.TextBoxFor(x => x.OptionText)

It will display the first option in a textbox. But, again what I'm trying to achieve is to display all options in a multitext input.

Any ideas?

回答1:

You nearly have it.

In this EditorTemplates\Option.cshtml add the following:

@model IEnumerable<Option>
@foreach(var option in Model)
{
   @Html.TextBoxFor(m => option.Text)
}

Then call it in your view like this:

@Html.EditorFor(model => model.Options)

If you are not populating your options on the initial get, you will need to add this in your ItemViewModel class:

public class ItemViewModel
{
    public ItemViewModel()
    {
        Options = new List<Option>();
    }
    public int itemId { get; set; }

    [UIHint("Option")]
    public List<Option> Options { get; set; }
}

This constructor initializes the collection:

public ItemViewModel()
{
    Options = new List<Options>();
}

回答2:

Just create a view in Shared/EditorTemplates/Option.cshtml

@model Option

@Html.TextBoxFor(m => m.Text)

And call

@Html.EditorFor(model => model.Options)

EditorFor iterates over collection for you.

回答3:

I bumped into the same issue and I have different solution but a bit similar with hutchonoid.

So the first part is same, modify the Option.cshtml like following:

@model IEnumerable<Option>
@foreach(var option in Model)
{
   @Html.TextBoxFor(m => option.Text)
}

And in Item.cshtml, I call the Option.cshtml using Html.Partial, like following:

@Html.Partial("Option", model:Model.Options)

And in my case, I don't have to modify the ItemViewModel class. Hopefully this can be alternative answer for this problem. Cheers!

回答4:

Using @hutchonoid's answer, you should call the template in view:

@Html.EditorFor(model => Model.Options)

instead of

@Html.EditorFor(model => model.Options)

and please be noted, the Option.cshtml template is in Views\Item\EditorTemplates\Option.cshtml or View\Shared\EditorTemplates\Option.cshtml