MVC 500内部服务器错误

Question

I'm trying to send the request to controller but the console returns 500 error. What is the problem here?

Thanks in advance!

JS CODE:

    $('.delete_btn').on('click', function () {
        $.get("/List/Delete", { param: $(this).data('id') }, function (data) {
            $('#modal_window').replaceWith('<div id="modal_window">' + data + '</div>');
            $('#modal_window').show();
        });
    });
});

Controller:

  //DELETE ITEM
    public ActionResult Delete(int id)
    {
        H_Table item = db_connection.H_Table.Find(id);
        db_connection.H_Table.Remove(item);
        db_connection.SaveChanges();
        return RedirectToAction("Index");
    }

SCREENSHOT:

Answer 1

You are passing wrong paramert name.

Change your parameter name from param to id in ajax request.

  $('.delete_btn').on('click', function () {
           $.get("/List/Delete", { id: $(this).data('id') }, function (data) {
               $('#modal_window').replaceWith('<div id="modal_window">' + data + '</div>');
               $('#modal_window').show();
           });
       });

And your button must have data-id attribute. like this

<input type="button" class="delete_btn" value="Test" data-id="7" />

Answer 2

您正在执行删除操作，因此需要发出发布或删除请求，并且在控制器中需要通过[httpPost]装饰操作方法。