public TcpClient Server;
public NetworkStream NetStrm;
public StreamReader RdStrm;
public string Data;
public byte[] szData;
public string CRLF = "\r\n";
private void ConnectBtn_Click(object sender, System.EventArgs e)
{
// change cursor into wait cursor
Cursor cr = Cursor.Current;
Cursor.Current = Cursors.WaitCursor;
// create server POP3 with port 110
Server = new TcpClient(POPServ.Text,110);
Status.Items.Clear();
try
{
// initialization
NetStrm = Server.GetStream();
RdStrm= new StreamReader(Server.GetStream());
Status.Items.Add(RdStrm.ReadLine());
// Login Process
Data = "USER "+ User.Text+CRLF;
szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
NetStrm.Write(szData,0,szData.Length);
Status.Items.Add(RdStrm.ReadLine());
Data = "PASS "+ Passw.Text+CRLF;
szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
NetStrm.Write(szData,0,szData.Length);
Status.Items.Add(RdStrm.ReadLine());
// Send STAT command to get information ie: number of mail and size
Data = "STAT"+CRLF;
szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
NetStrm.Write(szData,0,szData.Length);
Status.Items.Add(RdStrm.ReadLine());
// change enabled - disabled button
ConnectBtn.Enabled = false;
DisconnectBtn.Enabled = true;
RetrieveBtn.Enabled = true;
// back to normal cursor
Cursor.Current = cr;
}
catch(InvalidOperationException err)
{
Status.Items.Add("Error: "+err.ToString());
}
}
private void DisconnectBtn_Click(object sender, System.EventArgs e)
{
// change cursor into wait cursor
Cursor cr = Cursor.Current;
Cursor.Current = Cursors.WaitCursor;
// Send QUIT command to close session from POP server
Data = "QUIT"+CRLF;
szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
NetStrm.Write(szData,0,szData.Length);
Status.Items.Add(RdStrm.ReadLine());
//close connection
NetStrm.Close();
RdStrm.Close();
// change enabled - disabled button
ConnectBtn.Enabled = true;
DisconnectBtn.Enabled = false;
RetrieveBtn.Enabled = false;
// back to normal cursor
Cursor.Current = cr;
}
private void RetrieveBtn_Click(object sender, System.EventArgs e)
{
double x = 0.00;
Task.WaitAll(()=> new { x = GetValueAsync()}, 1000);
// change cursor into wait cursor
Cursor cr = Cursor.Current;
Cursor.Current = Cursors.WaitCursor;
string szTemp;
Message.Clear();
try
{
// retrieve mail with number mail parameter
Data = "RETR "+ Number.Text+CRLF;
szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());
NetStrm.Write(szData,0,szData.Length);
szTemp = RdStrm.ReadLine();
if(szTemp[0]!='-')
{
while(szTemp!=".")
{
Message.Text += szTemp+CRLF;
szTemp = RdStrm.ReadLine();
}
}
else
{
Status.Items.Add(szTemp);
}
// back to normal cursor
Cursor.Current = cr;
}
catch(InvalidOperationException err)
{
Status.Items.Add("Error: "+err.ToString());
}
}
