jquery ajax对controller的调用是发布空字符串

I am posting id of a vehicle to controller from jquery ajax post.Ajax call is calling controller method but that string is always null.I searched a lot on web but any solution is not working.id has value in view but null in controller.please help me.

我正在从jquery ajax post向controller发布车辆的id。Ajax调用是调用controller方法，但该字符串始终为空。我在网上搜索了很多，但是没有任何解决办法。id在视图中有值，在控制器中为空。请帮助我。

here is my code: View

这是我的代码:View

          <script type="text/javascript">
           function DeleteVehicle(id) {
          alert("working");
          if (confirm("Do you want to delete vehicle: " + id)) {
      //  var requestData = { 'vehicleId': vid }
        var dataPost={'id':id}
        $.ajax({



            url: '@Url.Action("DeleteVehicle", "Vehicle")',
            type: 'POST',
            data: dataPost,
            success: function (data) {
                alert("Success, sent data to controller");
            },
            error: function (data) {
                    alert("Error: " + data.responseText);
                }

        });
    }
}

$(function () {//when the document is ready
    $("#Delete").click(DeleteVehicle);
});

controller

控制器

        public ActionResult DeleteVehicle(string id)
        {

            //code
               return Json(id, JsonRequestBehavior.AllowGet);
       }

3 个解决方案

#1

have you put httppost attribute on action method as below?

您是否将httppost属性放在action方法上，如下所示?

[httpPost]
 public ActionResult DeleteVehicle(string id)
        {

            //code
               return Json(id, JsonRequestBehavior.AllowGet);
       }

and in jquery

在jquery

  $(document).ready(function() {
        $("#Delete").on("click",  function(){
       var id = $(this).).attr("id"); ////fetch id wherever you are fetching
       alert("working");
              if (confirm("Do you want to delete vehicle: " + id)) {
          //  var requestData = { 'vehicleId': vid }
            var dataPost={'id':id}
            $.ajax({



                url: '@Url.Action("DeleteVehicle", "Vehicle")',
                type: 'POST',
                data: dataPost,
                success: function (data) {
                    alert("Success, sent data to controller");
                },
                error: function (data) {
                        alert("Error: " + data.responseText);
                    }

            });
        }


    });

for more information have a look at this

使用Javascript弹出MVC删除记录

#2

var dataPost should be string, something like var dataPost = '{"id":"' + id + '"}' and additional settings for $.ajax are as follows-->

var dataPost应该是字符串，比如var dataPost = '{"id:"' + id + '"}'以及$的附加设置。ajax如下- - >

contentType: "application/json; charset=utf-8",
dataType: "json",

#3

try to put [HttpPost] Attribute in your Action and try again.

尝试将[HttpPost]属性放入操作中，然后再试一次。

#1