MVC handling Collection Item Index in Partial view model

Question

I Have a ViewModel with a collection inside such as: ``` public class CreateCampaignViewModel : ControlPanelViewModel { [RequiredField] public string Name { get; set; } public List Advertisements { get; set; } ... } ``` in the View, if i use it like: ``` @for (int i = 0; i < Model.Advertisements.Count; i++) {

מודעה

כותרת הפרסומת

@Html.TextBoxFor(m => m.Advertisements[i].Title)

} ``` everything is good, and i can see the list when i post the form... but i want to nest the AdvertisementEditor in a Partial View hence my view becomes: ``` @for (int i = 0; i < Model.Advertisements.Count; i++) { Html.RenderPartial("AdvertisementEditor", Model.Advertisements[i]); } ``` and my Partial: ``` @model Pushed.Models.AdvertisementViewModel

מודעה<…

Accepted Answer

found a solution, Can't believe i didn't find this before!

there are two ways to tell MVC.NET to prefix input fields:

create EditorTemplate instead of PartialView... and it will work just great.

define `TemplateInfo.HtmlFieldPrefix`

calling the Partial View as illustrated:

```
@{ 
  Html.RenderPartial("TargetAudienceParameters", Model.TargetAudienceParameter, 
      new ViewDataDictionary {
           TemplateInfo = new TemplateInfo {
               HtmlFieldPrefix = "Advertisements[4]" // 4 being an example
           } 
      }); 
 }
```

MVC handling Collection Item Index in Partial view model

Solution

Problem