email发送类

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Net.Mail;
using System.Net;
using System.Text;
/// <summary>
/// Email 的摘要说明
/// </summary>
public class Email
{
    public Email(string host, int port, string smtpUsername, string smtpPassword)
    {
        _host = host;
        _port = port;
        _smtpUsername = smtpUsername;
        _smtpPassword = smtpPassword;
    }
    public Email() { }

    private string _host;

    public string Host
    {
        get { return _host; }
        set { _host = value; }
    }
    private int _port;

    public int Port
    {
        get { return _port; }
        set { _port = value; }
    }
    private string _smtpUsername;

    public string SmtpUsername
    {
        get { return _smtpUsername; }
        set { _smtpUsername = value; }
    }
    private string _smtpPassword;

    public string SmtpPassword
    {
        get { return _smtpPassword; }
        set { _smtpPassword = value; }
    }

    public void SendMail(string from, string to, string subject, string body, bool ssl, string[] cc, string[] bcc)
    {
        // Create mail message
        MailMessage message = new MailMessage(from, to, subject, body);
        message.BodyEncoding = Encoding.GetEncoding(936);
        message.IsBodyHtml = true;
        if (cc != null && cc.Length > 0)
        {
            foreach (string ccAddress in cc)
            {
                message.CC.Add(new MailAddress(ccAddress));
            }
        }
        if (bcc != null && bcc.Length > 0)
        {
            foreach (string bccAddress in bcc)
            {
                message.Bcc.Add(new MailAddress(bccAddress));
            }
        }

        // Send email
        SmtpClient client = new SmtpClient(this._host, this._port);
        if (!String.IsNullOrEmpty(this._smtpUsername) && !String.IsNullOrEmpty(this._smtpPassword))
        {
            client.Credentials = new NetworkCredential(this._smtpUsername, this._smtpPassword);
        }
        if (ssl)
        {
            client.EnableSsl = true;
        }
        client.Send(message);
    }  
}