How to use HTML helpers on an IEnumerable?

问题:

I have the following IEnumerable

public class AuditDetailsViewModel
    {
    public string CustAddress { get; set; }
    public IEnumerable<DefectDetailsViewModel> DefectDetails { get; set; }

    }

    public class DefectDetailsViewModel
    {
        public string Description { get; set; }
        public string Comments { get; set; }
    }

In my razor view how I can enumerate over this using the Html helpers? If it was a list I could do the something like the following

@model AIS.Web.Areas.Inspector.ViewModel.AuditDetailsViewModel
@for (int i = 0; i < Model.DefectDetails.Count(); i++)
{
    @Html.TextBoxFor(m => m.DefectDetails[i].Description)
}

but how can I do that if the viewmodel is an IEnumerable?

回答1:

I use a foreach when looping through an ienumerable

foreach(var temp in Model.DefectDetails){
    @Html.TextBoxFor(x => temp.Description)
}

Hopefully this helps

回答2:

You will have to use ToList()

var items = Model.DefectDetails.ToList();

    @for (int i = 0; i < items.Count; i++)
    {
        @Html.TextBoxFor(m => m.Description[i].ToBeAudited)
    }

EDIT:

You cannot apply indexing to an IEnumerable, that is true, which is why you must transform it into a List by using ToList().

If you use a for..each loop, then when you postback to the controller, the content in the textboxes will not be transferred. You must use a for...loop with an indexer, else the MVC model binder cannot bind the data correctly.

In your code, you're not calling ToList() before iterating over the collection, hence your getting the error that it cannot apply indexing to an enumerable.