//Account/AcceptFriend
public ActionResult AcceptFriendRequest(int targetUserId, int friendId = 0, string tab = "allfriend", string returnPage = "UserProfile")
{
aService.AcceptFriendRequest(User.Identity.GetUserId <int>(), targetUserId);
if (!aService.CheckExistConversation(User.Identity.GetUserId <int>(), targetUserId))
{
aService.CreateConversation(User.Identity.GetUserId <int>(), targetUserId);
}
return(RedirectToAction(returnPage, new { @userId = targetUserId, @tab = tab, @friendId = friendId }));
}