c#利用system.net发送html格式邮件

using System;
using System.Text;
using System.Net;
using System.Net.Mail;
using System.Net.Mime;

namespace LeeStudio.Basic
{
/// <summary>
/// 邮件发送类
/// </summary>
public class SendEmail
{
private MailMessage mailMessage = new MailMessage(); //实例化一个邮件类

#region 构造函数
/// <summary>
/// 构造函数
/// </summary>
/// <param name="toAddresses">收件人地址（多个以,号分开）</param>
/// <param name="fromAddress">发件人地址</param>
/// <param name="title">主题</param>
/// <param name="body">正文</param>
public SendEmail(string toAddresses, string fromAddress, string title, string body)
: this(toAddresses, fromAddress, "", "", title, body, false)
{
}

/// <summary>
/// 构造函数
/// </summary>
/// <param name="toAddress">收件人地址</param>
/// <param name="fromAddress">发件人地址</param>
/// <param name="toName">收件人名字</param>
/// <param name="fromName">发件人姓名</param>
/// <param name="title">主题</param>
/// <param name="body">正文</param>
/// <param name="isBodyHtml">正文是否为html格式</param>
public SendEmail(string toAddress, string fromAddress, string toName, string fromName, string title, string body, bool isBodyHtml)
{
mailMessage.From = new MailAddress(fromAddress, fromName, Encoding.GetEncoding(936));
if (toName.Equals(""))
mailMessage.To.Add(toAddress);
else
mailMessage.To.Add(new MailAddress(toAddress, toName, Encoding.GetEncoding(936)));

mailMessage.Subject = title;
mailMessage.SubjectEncoding = Encoding.GetEncoding(936);

mailMessage.Body = body;
mailMessage.IsBodyHtml = isBodyHtml;
mailMessage.BodyEncoding = Encoding.GetEncoding(936);
}
#endregion

/// <summary>
/// 设置SMTP，并且将邮件发送出去
/// 所有参数都设置完成后再调用该方法
/// </summary>
/// <param name="password">发件人密码</param>
/// <param name="smtpHost">SMTP服务器地址</param>
public void SetSmtp(string password, string smtpHost)
{
SetSmtp(mailMessage.From.Address, password, smtpHost, 25, false, MailPriority.Normal);
}

/// <summary>
/// 设置SMTP，并且将邮件发送出去
/// 所有参数都设置完成后再调用该方法
/// </summary>
/// <param name="address">发件人地址（必须为真实有效的email地址）</param>
/// <param name="password">发件人密码</param>
/// <param name="smtpHost">SMTP服务器地址</param>
/// <param name="smtpPort">SMTP服务器的端口</param>
/// <param name="isEnableSsl">SMTP服务器是否启用SSL加密</param>
/// <param name="priority">邮件的优先级</param>
public void SetSmtp(string address, string password, string smtpHost, int smtpPort, bool isEnableSsl, MailPriority priority)
{
SmtpClient smtp = new SmtpClient();
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.Credentials = new NetworkCredential(address, password);
smtp.Host = smtpHost;
smtp.Port = smtpPort;
smtp.EnableSsl = isEnableSsl;

mailMessage.Priority = priority;
smtp.Send(mailMessage); //发送邮件
}

#region //设置邮件地址
/// <summary>
/// 设置更多收件人
/// </summary>
/// <param name="toAddresses">收件人地址</param>
public void SetMoreToAddress(string toAddresses)
{
mailMessage.To.Add(toAddresses);
}

/// <summary>
/// 设置更多收件人
/// </summary>
/// <param name="toAddresses">收件人地址</param>
/// <param name="toName">收件人名字</param>
public void SetMoreToAddress(string toAddress, string toName)
{
mailMessage.To.Add(new MailAddress(toAddress, toName, Encoding.GetEncoding(936)));
}

/// <summary>
/// 设置抄送者（多个以,号分开）
/// </summary>
/// <param name="ccAddresses">抄送者地址</param>
public void SetCarbonCopyFor(string ccAddresses)
{
mailMessage.CC.Add(ccAddresses);
}

/// <summary>
/// 设置抄送者
/// </summary>
/// <param name="ccAddress">抄送者地址</param>
/// <param name="ccName">抄送者名字</param>
public void SetCarbonCopyFor(string ccAddress, string ccName)
{
mailMessage.Bcc.Add(new MailAddress(ccAddress, ccName, Encoding.GetEncoding(936)));
}

/// <summary>
/// 设置密送者（多个以,号分开）
/// </summary>
/// <param name="bccAddresses">密送者</param>
public void SetBlindCarbonCopyFor(string bccAddresses)
{
mailMessage.Bcc.Add(bccAddresses);
}

/// <summary>
/// 设置密送者
/// </summary>
/// <param name="bccAddress">密送者</param>
/// <param name="bccName">密送者名字</param>
public void SetBlindCarbonCopyFor(string bccAddress, string bccName)
{
mailMessage.Bcc.Add(new MailAddress(bccAddress, bccName, Encoding.GetEncoding(936)));
}
#endregion

#region 添加附件
/// <summary>
/// 添加附件（自动识别文件类型）
/// </summary>
/// <param name="fileName">单个文件的路径</param>
public void Attachments(string fileName)
{
mailMessage.Attachments.Add(new Attachment(fileName));
}

/// <summary>
/// 添加附件（默认为富文本RTF格式）
/// </summary>
/// <param name="fileName">单个文件的路径</param>
public void AttachmentsForRTF(string fileName)
{
mailMessage.Attachments.Add(new Attachment(fileName, MediaTypeNames.Application.Rtf));
}
#endregion
}
}