//属于AddFriendCommand
private void AddFriend(object obj)
{
string targetName = (obj as ClientUser).UserName;
//首先判断是否已经是好友
var currentUserFriends = dataService.GetAllFriends();
var searchedUser = from u in currentUserFriends
where u.UserName == targetName
select u;
if (searchedUser.Count() != 0)
{
MessageBox.Show("你与此用户已是好友");
return;
}
Message msg = new Message(MessageType.FRIENDREQUEST, dataService.UserName, targetName
, string.Empty);
ResponseType response = dataService.SendAddFriendMessage(msg);
if (response == ResponseType.OK)
{
ClientUser newFriend = obj as ClientUser;
Utilities.Messenger.Default.Send(new Messages.NewFriendMessage(newFriend));
MessageBox.Show("添加好友成功");
}
else if (response == ResponseType.INVALID)
{
MessageBox.Show("添加好友失败");
}
else
{
MessageBox.Show("网络错误");
}
}