E-mail replying / forwarding in .NET

 

This example shows how to download an Email message from a Pop3 mailbox, forward or reply to this Email using the Smtp component from the Clever Internet .NET Suite library.

 

The code utilizes the Clever Internet Suite library.

 

 

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private const string BlockQuoteStart = "<BLOCKQUOTE "+ 
"style= " + 
"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px;" 
"BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px >";
private const string BlockQuoteEnd = "</BLOCKQUOTE>";
private const string ReplyText = "Reply follows here";
private StringBuilder textLines = new StringBuilder();

private string[] MakeTextReply(TextBody body)
{
	StringCollectionEx newTextLines = new StringCollectionEx();

	newTextLines.Add(ReplyText);
	newTextLines.Add("");
	newTextLines.Add("");

	foreach (string s in body.Strings)
			{
	newTextLines.Add("> " + s);
	}

		return newTextLines.ToArray();
	}
		
private string[] MakeHtmlReply(TextBody body)
{
	string reply = "<DIV>" + ReplyText + "</DIV";
	string s = StringUtils.GetStringsAsString(body.Strings);
	string text2insert = reply + BlockQuoteStart;

	htmlParser.Parse(s);

	HtmlTag tag = htmlParser.Tags.TagByName("BODY");
	if (tag == null)
	{
		s = text2insert + s + BlockQuoteEnd;
	}
	else
	{
		s = s.Insert(tag.InnerTextPos, text2insert);

		HtmlTag tagEnd = htmlParser.Tags.TagByName("BODY", tag.NextTag);
		s = s.Insert(tagEnd.InnerTextPos + text2insert.Length, BlockQuoteEnd);
	}
	return StringUtils.GetStringArray(s);
}

 

private string GetMessageText(string[] AHtml)
{
	textLines.Clear();
	htmlTextParser.Parse(AHtml);
	return textLines.ToString();
}

 

private void htmlTextParser_ParseTag(object sender, ParseTagEventArgs e)
{
	if (e.Tag.IsText)
	{
		textLines.Append(e.Tag.Text).ToString();
	}
}

 

private bool SendEmailMessage(string AToAddress, string ASubject)
{
	using (MessageForm dlg = new MessageForm()) 
	{
		dlg.edtTo.Text = AToAddress;
		dlg.edtSubject.Text = ASubject;

		if (mailMessage.Html != null)
		{
			dlg.memText.Lines =	MakeHtmlReply(mailMessage.Html);
					
		}
		else if (mailMessage.Text != null)
		{
			dlg.memText.Lines = MakeTextReply(mailMessage.Text);
		}

		var result = (dlg.ShowDialog() == DialogResult.OK);

		if (result)
		{

			if (mailMessage.Html != null)
			{
				string text = "";
				if (mailMessage.Text != null)
				{
					text = GetMessageText(dlg.memText.Lines);
				}
				mailMessage.BuildMessage(text, dlg.memText.Text);
			}
			else
			{
				mailMessage.BuildMessage(dlg.memText.Text, "");
			}

			mailMessage.From.FullAddress = dlg.edtFrom.Text;
			mailMessage.ToList.EmailAddresses = dlg.edtTo.Text;
			mailMessage.Subject = dlg.edtSubject.Text;

			smtp.Server = edtStmpServer.Text;
			smtp.Port = Convert.ToInt32(edtStpmPort.Text);
			smtp.UseTls = ClientTlsMode.Automatic;
			smtp.UserName = edtUser.Text;
			smtp.Password = edtPassword.Text;
			smtp.Open();

			try
			{
				smtp.Send(mailMessage);
			}
			finally
			{
				smtp.Close();
			}
		}
		return true;
	}
}

 

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Kind regards
Clever Components team
www.CleverComponents.com