【C#工具类】发送邮件（带有图片和附件）
共享一个工具类，在C#中发送邮件，可以添加图片，附件，还有CC，多个CC等功能。
public class SendEmail
{
public SendEmail()
{
}
/// <summary>
/// 发送Email
/// </summary>
/// <param name="Subject">标题</param>
/// <param name="Body">内容</param>
/// <param name="From">发件人</param>
/// <param name="To">收件人</param>
/// <param name="CC">抄送</param>
/// <param name="MailServer">邮件服务器</param>
/// <param name="FilePath">附件文件路径</param>
/// <param name="FileName">附件文件名</param>
/// <returns>发送情况</returns>
//public static string Send(string Subject, string Body, string From, string To, string CC, string MailServer, string FilePath, string FileName)
//{<!-- -->
// if (Subject.Trim() == "")
// {<!-- -->
// return "Email title can not be empty.";
// }
// if (Body.Trim() == "")
// {<!-- -->
// return "Email content can not be empty.";
// }
// if (From.Trim() == "")
// {<!-- -->
// return "Email sender‘s name can not be empty.";
// }
// if (To.Trim() == "")
// {<!-- -->
// return "Email receiver‘s name can not be empty.";
// }
// if (MailServer.Trim() == "")
// {<!-- -->
// return "Sending server address can not be empty.";
// }
// try
// {<!-- -->
// System.Web.Mail.MailMessage Mailmsg = new System.Web.Mail.MailMessage();
// Mailmsg.Subject = Subject;
// Mailmsg.Body = Body;
// Mailmsg.From = From;
// Mailmsg.To = To;
// if (CC.Trim() != "")
// {<!-- -->
// Mailmsg.Cc = CC;
// }
// if (FilePath.Trim() != "" && FileName.Trim() != "")
// {<!-- -->
// if (File.Exists(FilePath + FileName))
// {<!-- -->
// MailAttachment mailattachment = new MailAttachment(FilePath + FileName);
// Mailmsg.Attachments.Add(mailattachment);
// }
// }
// Mailmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");
// Mailmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", ConfigurationManager.AppSettings["EmailAccount"].ToString().Trim());
// Mailmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", ConfigurationManager.AppSettings["EmailPassword"].ToString().Trim());
// SmtpMail.SmtpServer = MailServer;
// SmtpMail.Send(Mailmsg);
// if (FilePath.Trim() != "" && FileName.Trim() != "")
// {<!-- -->
// if (File.Exists(FilePath + FileName))
// {<!-- -->
// DeleteFile(FilePath + FileName);
// }
// }
// return "Sent successfully.";
// }
// catch (Exception ex)
// {<!-- -->
// Utility.WriteError(ex.Message);
// throw new Exception("Email sending error, please contact administrator.");
// }
//}
public static string SendMailByImageWithBCC(string Subject, string Body, string From, string To, string CC,string BCC, string FilePath, string FileName, string ImagePath)
{
if (Subject.Trim() == "")
{
return "Email title can not be empty.";
}
if (Body.Trim() == "")
{
return "Email content can not be empty.";
}
if (From.Trim() == "")
{
return "Email sender‘s name can not be empty.";
}
if (To.Trim() == "")
{
return "Email receiver‘s name can not be empty.";
}
try
{
System.Net.Mail.MailMessage Mailmsg = new System.Net.Mail.MailMessage();
Mailmsg.Subject = Subject;
Mailmsg.From = new MailAddress(From);
Mailmsg.To.Add(new MailAddress(To));
//string content = "如果您邮件客户端不支持HTML格式，请切换到“普通文本”视图，将看到此内容";
//Mailmsg.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(content, null, "text/plain"));
//Body += "<br /><img src=\"cid:weblogo\">"; //注意此处嵌入的图片资源
AlternateView htmlBody = AlternateView.CreateAlternateViewFromString(Body, null, "text/html");
//LinkedResource lrImage = new LinkedResource(ImagePath, "image/gif");
//lrImage.ContentId = "weblogo"; //此处的ContentId 对应 htmlBodyContent 内容中的 cid: ，如果设置不正确，请不会显示图片
//htmlBody.LinkedResources.Add(lrImage);
Mailmsg.AlternateViews.Add(htmlBody);
if (CC.Trim() != "")
{
Mailmsg.CC.Add(new MailAddress(CC));
}
if (BCC.Trim() != "")
{
Mailmsg.Bcc.Add(new MailAddress(BCC));
}
if (FilePath.Trim() != "" && FileName.Trim() != "")
{
if (File.Exists(FilePath + FileName))
{
Mailmsg.Attachments.Add(new Attachment(FilePath + FileName));
}
}
string MailServer = ConfigurationManager.AppSettings["MailServer"].ToString().Trim();
string usrName = ConfigurationManager.AppSettings["RequestEmail"].ToString().Trim();
string passWord = ConfigurationManager.AppSettings["RequestPwd"].ToString().Trim();
System.Net.Mail.SmtpClient smtp = new SmtpClient(MailServer);
smtp.Credentials = new NetworkCredential(usrName, passWord);
smtp.Send(Mailmsg);
Mailmsg.Dispose();
if (FilePath.Trim() != "" && FileName.Trim() != "")
{
if (File.Exists(FilePath + FileName))
{
DeleteFile(FilePath + FileName);
}
}
return "Sent successfully.";
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
/// <summary>
/// 发送带图片的Email
/// </summary>
/// <param name="Subject">主题</param>
/// <param name="Body">主体</param>
/// <param name="From">发件人</param>
/// <param name="To">收件人</param>
/// <param name="CC">抄送</param>
/// <param name="MailServer">MailServer</param>
/// <param name="FilePath">文件路径</param>
/// <param name="FileName">文件名称</param>
/// <param name="ImagePath">图片路径</param>
/// <returns></returns>
public static string SendMailByImage(string Subject, string Body, string From, string To, string CC, string FilePath, string FileName, string ImagePath)
{
if (Subject.Trim() == "")
{
return "Email title can not be empty.";
}
if (Body.Trim() == "")
{
return "Email content can not be empty.";
}
if (From.Trim() == "")
{
return "Email sender‘s name can not be empty.";
}
if (To.Trim() == "")
{
return "Email receiver‘s name can not be empty.";
}
try
{
System.Net.Mail.MailMessage Mailmsg = new System.Net.Mail.MailMessage();
Mailmsg.Subject = Subject;
Mailmsg.From = new MailAddress(From);
Mailmsg.To.Add(new MailAddress(To));
//string content = "如果您邮件客户端不支持HTML格式，请切换到“普通文本”视图，将看到此内容";
//Mailmsg.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(content, null, "text/plain"));
//Body += "<br /><img src=\"cid:weblogo\">"; //注意此处嵌入的图片资源
AlternateView htmlBody = AlternateView.CreateAlternateViewFromString(Body, null, "text/html");
//LinkedResource lrImage = new LinkedResource(ImagePath, "image/gif");
//lrImage.ContentId = "weblogo"; //此处的ContentId 对应 htmlBodyContent 内容中的 cid: ，如果设置不正确，请不会显示图片
//htmlBody.LinkedResources.Add(lrImage);
Mailmsg.AlternateViews.Add(htmlBody);
if (CC.Trim() != "")
{
Mailmsg.CC.Add(new MailAddress(CC));
}
if (FilePath.Trim() != "" && FileName.Trim() != "")
{
if (File.Exists(FilePath + FileName))
{
Mailmsg.Attachments.Add(new Attachment(FilePath + FileName));
}
}
string MailServer = ConfigurationManager.AppSettings["MailServer"].ToString().Trim();
string usrName = ConfigurationManager.AppSettings["RequestEmail"].ToString().Trim();
string passWord = ConfigurationManager.AppSettings["RequestPwd"].ToString().Trim();
System.Net.Mail.SmtpClient smtp = new SmtpClient(MailServer);
smtp.Credentials = new NetworkCredential(usrName, passWord);
smtp.Send(Mailmsg);
Mailmsg.Dispose();
if (FilePath.Trim() != "" && FileName.Trim() != "")
{
if (File.Exists(FilePath + FileName))
{
DeleteFile(FilePath + FileName);
}
}
return "Sent successfully.";
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
public static string SendMailByImageWithMultCC(string Subject, string Body, string From, string To, string CC, string MailServer, string FilePath, string FileName, string ImagePath)
{
if (Subject.Trim() == "")
{
return "Email title can not be empty.";
}
if (Body.Trim() == "")
{
return "Email content can not be empty.";
}
if (From.Trim() == "")
{
return "Email sender‘s name can not be empty.";
}
if (To.Trim() == "")
{
return "Email receiver‘s name can not be empty.";
}
if (MailServer.Trim() == "")
{
return "Sending server address can not be empty.";
}
try
{
System.Net.Mail.MailMessage Mailmsg = new System.Net.Mail.MailMessage();
Mailmsg.Subject = Subject;
Mailmsg.From = new MailAddress(From);
Mailmsg.To.Add(new MailAddress(To));
string content = "如果您邮件客户端不支持HTML格式，请切换到“普通文本”视图，将看到此内容";
Mailmsg.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(content, null, "text/plain"));
Body += "<br /><img src=\"cid:weblogo\">"; //注意此处嵌入的图片资源
AlternateView htmlBody = AlternateView.CreateAlternateViewFromString(Body, null, "text/html");
LinkedResource lrImage = new LinkedResource(ImagePath, "image/gif");
lrImage.ContentId = "weblogo"; //此处的ContentId 对应 htmlBodyContent 内容中的 cid: ，如果设置不正确，请不会显示图片
htmlBody.LinkedResources.Add(lrImage);
Mailmsg.AlternateViews.Add(htmlBody);
if (CC.Trim() != "")
{
if (CC.IndexOf(";") == -1)
{
Mailmsg.CC.Add(new MailAddress(CC));
}
else
{
string[] ccList = CC.Split(‘;‘);
for (int i = 0; i < ccList.Length; i++)
{
Mailmsg.CC.Add(new MailAddress(ccList[i].ToString().Trim()));
}
}
}
if (FilePath.Trim() != "" && FileName.Trim() != "")
{
if (File.Exists(FilePath + FileName))
{
Mailmsg.Attachments.Add(new Attachment(FilePath + FileName));
}
}
string usrName = ConfigurationManager.AppSettings["EmailAccount"].ToString().Trim();
string passWord = ConfigurationManager.AppSettings["EmailPassword"].ToString().Trim();
System.Net.Mail.SmtpClient smtp = new SmtpClient(MailServer);
smtp.Credentials = new NetworkCredential(usrName, passWord);
smtp.Send(Mailmsg);
Mailmsg.Dispose();
if (FilePath.Trim() != "" && FileName.Trim() != "")
{
if (File.Exists(FilePath + FileName))
{
DeleteFile(FilePath + FileName);
}
}
return "Sent successfully.";
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
public static void DeleteFile(string Path)
{
if (File.Exists(Path))
{
File.Delete(Path);
}
}
}