无法使用 Twitter Bootstrap Typeahead 发布 ID

Question

我在我的 MVC5 项目中使用 Twitter Bootstrap Typeahead，它正确列出了相关记录。虽然我可以在更新程序部分检索所选记录的 Id 值，但我无法在表单提交上发布它。我尝试了许多不同的 Id 参数组合，但没有任何意义。如何使用 Twitter Bootstrap Typeahead 发布 Id 参数？

查看：

@Html.HiddenFor(m => m.StudentId)

<input id="StudentId" name="StudentId" type="text" class="form-control tt-input" 
    autocomplete="off" spellcheck="false" dir="auto">

<script>
    $("#StudentId").typeahead({
        minLength: 1,
        source: function (query, process) {
            var lookups = [];
            map = {};

            // This is going to make an HTTP post request to the controller
            return $.post('/Grade/StudentLookup?query=%QUERY', { query: query }, function (data) {

                // Loop through and push to the array
                $.each(data, function (i, lookup) {
                    map[lookup.Name] = lookup;
                    lookups.push(lookup.Name);
                });

                // Process the details
                process(lookups);
            });
        },
        updater: function (item) {
            var selectedId = map[item].Id;
            console.log("Selected : " + selectedId);
            return item;
        }
    });
</script>

控制器：

public ActionResult StudentLookup(string query)
{
    var students = repository.Students.Select(m => new StudentViewModel
    {
        Id = m.Id,
        Name = m.Name + " " + m.Surname                
    })
    .Where(m => m.Name.StartsWith(query));
    return Json(students, JsonRequestBehavior.AllowGet);
}

Answer 1

将字段分为名称和ID，您甚至可以将ID字段隐藏或只读。

<input id="StudentName" type="text" class="form-control tt-input" 
    autocomplete="off" spellcheck="false" dir="auto">

<input id="StudentId" name="StudentId" type="text">

<script>
    $("#StudentName").typeahead({
        minLength: 1,
        source: function (query, process) {
            var lookups = [];
            map = {};

            // This is going to make an HTTP post request to the controller
            return $.post('/Grade/StudentLookup?query=%QUERY', { query: query }, function (data) {

                // Loop through and push to the array
                $.each(data, function (i, lookup) {
                    map[lookup.Name] = lookup;
                    lookups.push(lookup.Name);
                });

                // Process the details
                process(lookups);
            });
        },
        updater: function (item) {
            var selectedId = map[item].Id;
            console.log("Selected : " + selectedId);
            $("#StudentId").val(selectedId)
            return item;
        }
    });
</script>