我用的后台是asp.net mvc3

前台代码$.ajax({
                                url: "Home/BloodPressure",
                                type: "POST",
                                data: "PeoID="+ node.data.PeoID.toString(),
                                contentType:"application/json",
                                dataType: "json",
                                success: function () { alert("success")},
                                error:function(){alert("error")}
                            });

其中node.data.PeoID.toString()是将整数的ID传入，这句获取id值没有问题的，

后台public ActionResult BloodPressure(string PeoID)
        {
            ViewBag.PeoID = PeoID;
            return View();
        }

但是总是出现error的对话框  为什么不成功？？