recipientcollection.cs

A project written in C# sends email without smtp server. It queries dns server for mx records and se

// $Id: RecipientCollection.cs,v 1.2 2006/08/07 11:06:09 ethem Exp $
namespace Erle.DnsMail
{
	using System;
	using System.Collections;

	public sealed class RecipientCollection : ArrayList
	{
		public RecipientCollection() : base() { }
		public RecipientCollection(int capacity) : base(capacity) { }
		public RecipientCollection(bool usesMailServer)
			: this()
		{
			ums = usesMailServer;
		}

		public override int Add(Object recipient)
		{
			if (recipient == null)
				throw new ArgumentNullException("recipient");

			Recipient tmpAdd;
			if (recipient is Recipient)
				tmpAdd = recipient as Recipient;
			else if (recipient is String)
				tmpAdd = new Recipient(recipient as String);
			else
				throw new ArgumentException(String.Format("Add a Recipient or String object. You used: {0}", recipient.GetType().FullName), "recipient");

			if ((tmpAdd.Email == null) || (tmpAdd.Email == string.Empty))
				throw new EmailException(String.Format("Email address cannot be null. Count: {0}", Count));

			if (!ums)
			{
				if (Count == 0)
				{
					if ((domain = DnsMail.FindEmailDomain(tmpAdd.Email)) == null)
						throw new EmailException(String.Format("{0} isn't a valid email address.", tmpAdd.Email));
				}
				else
				{
					if (domain != DnsMail.FindEmailDomain(tmpAdd.Email))
						throw new EmailException(String.Format("{0} cannot add; All Recipients' domains must be @{1}.", tmpAdd.Email, domain));
				}
				return base.Add(tmpAdd);
			}
			else
			{
				if (DnsMail.EmailCheck(tmpAdd.Email))
					return base.Add(tmpAdd);
				else
					throw new EmailException(String.Format("{0} isn't a valid email address.", tmpAdd.Email));
			}
		}

		public override Object this[int index]
		{
			get { return base[index]; }
			set { throw new NotSupportedException(); }
		}

		public override void Insert(int index, Object recipient)
		{
			this.Add(recipient);
		}

		private bool ums;
		private string domain;
		public string Domain
		{
			get { return domain; }
		}
	}
};