JS Ajax 调用代码：
$.ajax({
url: "/AjaxController/GetInfoById",
type: 'GET',
datatype: "json",
contentType: "application/json; charset=utf-8",
data: { id: id },
success: function (data) {
if (data) {
alert(data.Id);
alert(data.Title);
}
},
error: function (error) {
$("#result_div").html(error.responseText);
}
});
Controller Action 代码：
[HttpGet]
public async Task<JsonResult> GetInfoById(int id)
{
var result = await service.GetInfoById(id);
return Json(result);
}
注意这种实现在 ASP.NET 5 项目中，是没有任何问题的，但在 ASP.NET MVC 5 中，会报如下错误：
This request has been blocked because sensitive information could be disclosed to third party web sites when this is used in a GET request. To allow GET requests, set JsonRequestBehavior to AllowGet.
正确代码（AllowGet）：
[HttpGet]
public async Task<JsonResult> GetInfoById(int id)
{
var result = await service.GetInfoById(id);
return Json(result, JsonRequestBehavior.AllowGet);
}
参考：