如何在 jquery 事件处理程序上动态获取 mvc model？

Question

I'm using asp.net core and MVC architecture. I have a jquery event handler on a button click. If the user click the button, I apply different change to the DOM, based on data I fetch from my c# model. The data I need from my model change depending on user input. But as the event handler is only executed at launch time, the data from my model in it reflect the initial state of my model.

My javascript:

    $(document).on("click", ".edit-log-child", function () {
            var NameCategory = $(this).data('id');

            /*some DOM change*/

            var json = @Json.Serialize(@Model.Categories);
            if (JSON.stringify(json) != JSON.stringify("{[]}"))
            {
                 var currentCategory = json.find(element => element.name == NameCategory);
                 ProcessEditCategorie(currentCategory);

            }

        });

Is there a way to fetch my current model from my javascript function/event handler?

Answer 1

You can use form post or ajax:

1.form post(submit the form to action,and action return a view with the data you want):

view(GetData1.cshtml):

@model IEnumerable<string>
<form method="post">
    <input name="id" id="id"/>
    <input type="submit" value="submit" />
</form>

action:

public IActionResult GetData1(string id) {
            List<string> l = new List<string> { "a", "b", "c" };
            return View(l);
        }

result: 2.ajax(when button click,get data from action and will not refresh page):

view(GetData1.cshtml):

    <input name="id" id="id"/>
<button onclick="getdata()" >submit</button>
<script>
        function getdata() {
           $.ajax({
                    type: "POST",
                url: '@Url.Action("GetData2", "Test")',
                data: { "id": $("#id").val() }
                 }).done(function (data) {

                });
        }
    </script>

action(TestController):

public List<string> GetData2(string id)
    {
        List<string> l = new List<string> { "a", "b","c" };
        return l;
    }

result: