如何ASP.NET Core Razor中处理Ajax请求

##前台代码
<form method="post">
      <div class="login-ic">
        <i></i>
        <input asp-for="Login.UserName" />
        <div class="clear"> </div>
      </div>
      <div class="login-ic">
        <i class="icon"></i>
        <input asp-for="Login.PassWord" />
        <div class="clear"> </div>
      </div>
      <div>
        <ul>
          <li>
            <input type="checkbox" value="">
            <label for="brand1">记得我</label>
          </li>
        </ul>
        <a href="#" rel="external nofollow" >
          忘记密码?
        </a>
      </div>
      <div class="log-bwn">
        <input type="button" value="登录">
      </div>
      <div class="log-bwn">
        <input type="button" value="注册">
      </div>
</form>
##Script代码
$("#btnLogin").click(function () {
      $.post('/user/Login?hanler=LoginIn', { UserName:$("#UserName").val(),              PassWord:$("#PassWord").val() }, function (data) {
        console.log(data);
      });
    });
##后台代码
public class LoginModel : PageModel
{

  private UserServiciCasee _userService;

  public LoginModel(UserServiciCasee userService)
  {
    _userService = userService;
  }

  public void OnGet()
  {
  }
  [BindProperty]
  public UserLoginDto Login { get; set; }
  public async Task<ActionResult> OnPostLoginInAsync()
  {
    //if (ModelState.IsValid)
    //{
    //  var user = await _userService.LoginAsync(Login);
    //  if (user != null)
    //  {
    //    return new JsonResult(ApiResult.ToSucess("登录成功!"));
    //  }
    //  return new JsonResult(ApiResult.ToFail("帐号密码错误!"));
    //}
    return new JsonResult(ApiResult.ToFail("参数填写错误,请检查!"));
  }
}

<form method="post">
<!-- form markup -->
</form>

$("#btnLogin").click(function () {
      $.ajax({
        type: "POST",
        url: "/user/Login?handler=LoginIn",
        beforeSend: function (xhr) {
          xhr.setRequestHeader("XSRF-TOKEN",
            $('input:hidden[name="__RequestVerificationToken"]').val());
        },
        data: { UserName: $("#UserName").val(), PassWord: $("#PassWord").val() },
        success: function (response) {
          console.log(response);
        },
        failure: function (response) {
          alert(response);
        }
      });
    });

public void ConfigureServices(IServiceCollection services)
{
  services.AddMvc();
  services.AddAntiforgery(o => o.HeaderName = "XSRF-TOKEN");
}