问$.ajax GET on _layout.cshtml页面在从Controller/Action页面发布时会导致未定义的错误

EN

function ConfirmFriend(friendID, addOrDecline) {

      //Ajax Call Get All Employee Records
      $.ajax({
          type: "GET",
          cache: false,
          url: "Home/GetLiveFriends",
          data: {},
          success: function (data) {
              var testnum = data;
              if (testnum == 0 && addOrDecline == "add") {
                  OpenBadges.issue(["https://company.blob.core.windows.net/badges/1.json"]);
              }

              var userID = '@ViewBag.UserID';

              var postData = {
                  'userID': userID,
                  'userFriendID': friendID,
                  'addOrDelete': addOrDecline
              };

              $.post('/User/Show/', postData, function (data) {
              });

              document.getElementById("HiddenPendingFriends" + friendID).style.display = 'none';

              if (addOrDecline == 'add') {
                  document.getElementById("HiddenAcceptedFriends" + friendID).style.display = 'block';
              }
              else {
                  document.getElementById("HiddenDeclinedFriends" + friendID).style.display = 'block';
              }
          },
          error: function (xhr, textStatus, error, exception) {
              alert(error.status + "<--and--> " + error.statusText);
              alert(exception);
              alert(xhr.statusText);
              alert(textStatus.data);
              alert(error);
          }
      });
  };

public int GetLiveFriends()
{
  return hvm.GetLiveFriends();
}

public int GetLiveFriends()
{
  return friendRepository.Get(f => f.FriendUserID == User.UserID && f.Accepted == 1).Count();
}