/// <summary>
/// Is called when LIST command has completed.
/// </summary>
/// <param name="op">Asynchronous operation.</param>
private void UidlCompleted(UidlAsyncOP op)
{
try{
// Operation failed.
if(op.Error != null){
// Assume that UIDL not supported, skip error.
SetState(AsyncOP_State.Completed);
}
// Operation succeeded.
else{
m_pPop3Client.m_IsUidlSupported = true;
// Fill messages UID info.
foreach(string responseLine in op.ResponseLines){
string[] seqNo_Uid = responseLine.Trim().Split(new char[]{' '});
m_pPop3Client.m_pMessages[Convert.ToInt32(seqNo_Uid[0]) - 1].SetUID(seqNo_Uid[1]);
}
SetState(AsyncOP_State.Completed);
}
}
catch(Exception x){
m_pException = x;
m_pPop3Client.LogAddException("Exception: " + x.Message,x);
SetState(AsyncOP_State.Completed);
}
op.Dispose();
}
/// <summary>
/// Starts sending UIDL command to POP3 server.
/// </summary>
/// <param name="op">Asynchronous operation.</param>
/// <returns>Returns true if aynchronous operation is pending (The <see cref="UidlAsyncOP.CompletedAsync"/> event is raised upon completion of the operation).
/// Returns false if operation completed synchronously.</returns>
/// <exception cref="ObjectDisposedException">Is raised when this object is disposed and and this method is accessed.</exception>
/// <exception cref="InvalidOperationException">Is raised when POP3 client is not in valid state. For example 'not connected'.</exception>
/// <exception cref="ArgumentNullException">Is raised when <b>op</b> is null reference.</exception>
private bool UidlAsync(UidlAsyncOP op)
{
if(this.IsDisposed){
throw new ObjectDisposedException(this.GetType().Name);
}
if(!this.IsConnected){
throw new InvalidOperationException("You must connect first.");
}
if(op == null){
throw new ArgumentNullException("op");
}
if(op.State != AsyncOP_State.WaitingForStart){
throw new ArgumentException("Invalid argument 'op' state, 'op' must be in 'AsyncOP_State.WaitingForStart' state.","op");
}
return op.Start(this);
}
/// <summary>
/// Is called when LIST command has completed.
/// </summary>
/// <param name="op">Asynchronous operation.</param>
private void ListCompleted(ListAsyncOP op)
{
try{
// Operation failed.
if(op.Error != null){
m_pException = op.Error;
m_pPop3Client.LogAddException("Exception: " + op.Error.Message,op.Error);
SetState(AsyncOP_State.Completed);
}
// Operation succeeded.
else{
// Fill messages info.
m_pPop3Client.m_pMessages = new POP3_ClientMessageCollection(m_pPop3Client);
foreach(string seqNo_Size in op.ResponseLines){
m_pPop3Client.m_pMessages.Add(Convert.ToInt32(seqNo_Size.Trim().Split(new char[]{' '})[1]));
}
// Try to UID's for messages(If server supports UIDL).
// Start executing LIST command.
POP3_Client.UidlAsyncOP uidlOP = new UidlAsyncOP();
uidlOP.CompletedAsync += delegate(object sender,EventArgs<UidlAsyncOP> e){
UidlCompleted(uidlOP);
};
if(!m_pPop3Client.UidlAsync(uidlOP)){
UidlCompleted(uidlOP);
}
}
}
catch(Exception x){
m_pException = x;
m_pPop3Client.LogAddException("Exception: " + x.Message,x);
SetState(AsyncOP_State.Completed);
}
op.Dispose();
}