function MyUser(data) {
     this.Id = ko.observable(data.Id);
     this.phone = ko.observable(data.Phone);
     this.Company = ko.observable(data.Company);
     this.SelectedGrowerID = ko.observable(data.SelectedGrowerID);

     this.setSelectedClass = function (item, event) {
        $('#hfGrowerID').val(event.target.id);

      this.SelectedGrowerID = event.target.id;
    };
   }

    function UserListViewModel() {
    // Data
    var self = this;
    self.users = ko.observableArray([]);

    // Load initial state from server, convert it to MyUser instances, then  populate  self.users
    $.getJSON("UserList/GetAllUsers", function (allData) {
    var mappedUsers = $.map(allData, function (item) { return new MyUser(item) });
    self.users(mappedUsers);
    });

<form action="UserList/Save" method="post">
          <ul id="UserList" data-bind="foreach: users" data-role="listview">
            <li data-bind="click: setSelectedClass"><a data-bind="attr: {id: Id}">
            <span data-bind="text: Company" /></a></li>
          </ul>

          <input id="hfGrowerID" type="hidden" />
          <input type="hidden" name="users" data-bind="value: ko.toJSON(users)" />

          <button type="submit">Save</button>
        </form>

<HttpPost()>
     Public Function Save(<FromJson()> users As IEnumerable(Of MyUserModel),
     hfGrowerID As String) As ActionResult
       'do stuff
       Return View ("Index", users)
     End Function

function MyUser(data) {
    var self = this;
    self.Id = ko.observable(data.Id);
    self.phone = ko.observable(data.Phone);
    self.Company = ko.observable(data.Company);
    self.SelectedGrowerID = ko.observable(data.SelectedGrowerID);

    self.setSelectedClass = function (item, event) {
        $('#hfGrowerID').val(event.target.id);
        self.SelectedGrowerID = event.target.id;
    };
}