Find index of EditorFor template

Question

I have an EditorFor template that looks like this,

@{
Layout = null;

@Html.EditorFor(model => model.Name)
@Html.EditorFor(model => model.Value)

}

for a List of Key/Value pairs. Here is the Model.

public List<NameValuePair> Parameters { get; set; }

This produces a list of editable boxes. I need to delete a particular element (so when the page refreshes the whole "row" is gone). I am having trouble finding the index of that element to pass to the delete function in my controller. Is there an easy way to find a particular index in a EditorFor template?

Update--

This is what the code in the view looks like. Which displays the list of parameters.

@Html.LabelFor(model => model.Parameters)
@Html.EditorFor(model => model.Parameters)
    <input type="submit" name="command" value="addParam" class="btn btn-default btn-primary" />

And this is what the delete method I am attempting to use in the controller looks like.

public ActionResult DeleteParamaters(long id, int index)
    {
        var templateStep = Biz.GetTemplateStep(id);

        templateStep.Parameters.RemoveAt(index);
        return View("CreateTemplateStep", templateStep);
    }

My end goal is a delete button next to each list item, and when clicked will delete that particular item from the list.

I am not opposed to it. But my JS skills are not the best. I'll look into it a bit. — MilesR, Oct 22 '15 at 15:56
Typically you would want to use a unique ID rather than an index for this sort of thing. Can't you associate an ID value with each of your models? — StriplingWarrior, Oct 22 '15 at 16:26
You don't need the index (and there is no way to get it if using an `EditorTemplate`). Show how you delete the item. — , Oct 22 '15 at 19:39

score 0 · Accepted Answer · edited May 23 '17 at 10:27

0

You can pass an additionalViewValues object to the EditorFor function.

An anonymous object that can contain additional view data that will be merged into the ViewDataDictionary instance that is created for the template.

So when you iterate over your list and renders the editor for each then you can pass any data to the template and so you can send it to the controller to identify your data.

There are couple of examples on SO about how to use additional data across templates. For example: Pass Additional ViewData to a Strongly-Typed Partial View

edited May 23 '17 at 10:27

Community

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answered Oct 22 '15 at 15:58

Peter Porfy

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This was exactly what I needed. Thank You – MilesR Oct 26 '15 at 16:45

Find index of EditorFor template

1 Answers1