ASP.NET MVC5: Want to update several items in Collection with model binding

Question

So I have a Collection of User objects, which should be mass-editable (edit many users at the same time). I\'m saving the user input to the database using Entity Framework.

Answer 1

You need to index your collection with a for rather than a foreach in order for the ModelBinder to pick it up:

for (var i = 0 ; i < Model.Count(); i++)
    {
        @Html.HiddenFor(modelItem => modelItem[i].Id)
        @Html.EditorFor(modelItem => modelItem[i].FirstName)
        @Html.ValidationMessageFor(modelItem => modelItem[i].FirstName)
        @Html.EditorFor(modelItem => modelItem[i].LastName)
        @Html.ValidationMessageFor(modelItem => modelItem[i].LastName)
        @Html.EditorFor(modelItem => modelItem[i].Birth)
        @Html.ValidationMessageFor(modelItem => modelItem[i].Birth)
    }