private static extern int AddIPAddress(IPADDR Address, IPMASK IpMask, uint IfIndex, out ulong NTEContext, out ulong NTEInstance);
private extern static int AddIPAddress(IPADDR Address, IPMASK IpMask, uint IfIndex, out ulong NTEContext, out ulong NTEInstance);
private void ConnectButton_Click(object sender, EventArgs e)
{
string clientId = DateTime.Now.ToString();
CliendID.Text = clientId;
if (IPADDR.Text.Length == 0)
{
MessageBox.Show("请输入服务器地址!");
return;
}
if (PORT.Text.Length == 0)
{
MessageBox.Show("端口号为空，请输入端口号!");
return;
}
if (!IPCheck(IPADDR.Text))
{
if (!domainnameToip(IPADDR.Text))
{
MessageBox.Show("IP或域名格式不正确!");
IPADDR.Text = string.Empty;
IPADDR.Focus();
return;
}
}
int port = Convert.ToInt32(PORT.Text);
if (port > 65535)
{
MessageBox.Show("端口号超过65535，请输入正确端口号！");
PORT.Text = string.Empty;
PORT.Focus();
return;
}
string username = "******";
string password = "******";
string[] topics = new string[1];
if (Sub.Text.Length != 0)
{
topics[0] = Sub.Text;
}
else
{
topics[0] = "+";
Sub.Text = "+";
}
byte[] qosLevels = { MqttMsgBase.QOS_LEVEL_AT_MOST_ONCE };
try
{
if (string.Compare(ConnectButton.Text, "connect") == 0)
{
//单向SSL通信
client = new MqttClient(IPADDR.Text, port, false, null, null, MqttSslProtocols.None);
//消息接受
client.MqttMsgPublishReceived += new MqttClient.MqttMsgPublishEventHandler(messageReceive);
//连接Broker
client.ConnectionClosed += new MqttClient.ConnectionClosedEventHandler(ConnectState);
client.Connect(clientId, username, password);
client.Subscribe(topics, qosLevels);
ConnectFlag = true;
Sub.Enabled = false;
PORT.Enabled = false;
IPADDR.Enabled = false;
DeviceID.Enabled = true;
FilePath.Enabled = true;
CliendID.Enabled = false;
PubTopic.Enabled = true;
UpgradeButton.Enabled = true;
FileButton.Enabled = true;
FilePushButton.Enabled = true;
ConnectButton.Text = "disconnect";
return;
}
else
{
client.Disconnect();
Sub.Enabled = true;
ConnectFlag = false;
PORT.Enabled = true;
IPADDR.Enabled = true;
DeviceID.Enabled = false;
CliendID.Enabled = true;
FilePath.Enabled = false;
FileButton.Enabled = false;
FilePushButton.Enabled = false;
PubTopic.Enabled = false;
UpgradeButton.Enabled = false;
ConnectButton.Text = "connect";
return;
}
}
catch (System.Exception)
{
MessageBox.Show("MQTT服务器连接失败，请重新连接！");
PORT.Enabled = true;
IPADDR.Enabled = true;
CliendID.Enabled = true;
FilePath.Enabled = false;
FileButton.Enabled = false;
FilePushButton.Enabled = false;
ConnectButton.Text = "connect";
return;
}
}