/**************搜索已添加的好友**************/
private void Searchfrdbtn_Click(object sender, EventArgs e)
{
string friendID = FrdIDbox.Text;
//先判断输入是否为有效ID
bool validfriendID = true;
if (friendID.Length == 10)
{
for (int i = 0; i < 10; i++)
{
if ((friendID[i] - '0') < 0 || (friendID[i] - '0' > 9))
{
validfriendID = false;
break;
}
}
}
else
{
validfriendID = false;
}
if (!validfriendID) //若ID无效
{
MessageBox.Show("请输入有效的ID（10位数字）");
FrdIDbox.Clear(); //清除
return;
}
//在friendlistbox查找这个ID，并选中
for (int i = 0; i < friendListBox.Items.Count; i++)
{
if ((friendListBox.Items[i] as string).Contains(friendID))
{
friendListBox.SelectedIndex = i;
friendListBox.TopIndex = i;
return;
}
}
if (friendID == userID)
{
MessageBox.Show("请不要搜索自己");
return;
}
//若没有查找到这个ID
MessageBox.Show(friendID + "还不是你的好友");
}
/**************添加新朋友*****************/
private void Addfrdbtn_Click(object sender, EventArgs e)
{
string friendID = FrdIDbox.Text;
//先判断输入是否为有效ID
bool validfriendID = true;
if (friendID.Length == 10)
{
for (int i = 0; i < 10; i++)
{
if ((friendID[i] - '0') < 0 || (friendID[i] - '0' > 9))
{
validfriendID = false;
break;
}
}
}
else
{
validfriendID = false;
}
if (!validfriendID) //若ID无效
{
MessageBox.Show("请输入有效的ID（10位数字）");
FrdIDbox.Clear(); //清除
return;
}
//检查friendlistbox是否已添加该好友
for (int i = 0; i < friendListBox.Items.Count; i++)
{
if ((friendListBox.Items[i] as string).Contains(friendID))
{
MessageBox.Show(friendID + "已经是你的好友");
return;
}
}
if (friendID == userID)
{
MessageBox.Show("请不要添加自己");
return;
}
//否则，先向服务器查询对方状态，获得IP
string sendMsg = "q" + friendID;
byte[] sendByt = Encoding.ASCII.GetBytes(sendMsg);
//NetworkStream toServerStream = toServer.GetStream();
toServerStream.Write(sendByt, 0, sendByt.Length);
byte[] rcvByt = new byte[1024];
int rcvLength = toServerStream.Read(rcvByt, 0, rcvByt.Length);
string rcvMsg = Encoding.ASCII.GetString(rcvByt, 0, rcvLength);
//toServerStream.Close();
if (rcvMsg == "n")
{
MessageBox.Show(friendID + "已离线，请稍后添加");
}
else
{
//再向friendID发送好友请求rff
TcpClient tcptoFriend = new TcpClient();
tcptoFriend.Connect(rcvMsg, listenPort);
NetworkStream streamtoFriend = tcptoFriend.GetStream();
sendMsg = "rff" + userID;
sendByt = Encoding.Unicode.GetBytes(sendMsg);
streamtoFriend.Write(sendByt, 0, sendByt.Length);
streamtoFriend.Close();
tcptoFriend.Close();
MessageBox.Show("已向" + friendID + "发送好友申请");
}
}
