我正在开发一个 Windows 应用程序,我需要在其中通过电子邮件将一些文件作为附件发送。
代码
public string SendMail(string mFrom,
string mPass,
string mTo,
string mSub,
string mMsg,
string mFile,
bool isDel)
{
string sql = "";
try
{
System.Net.Mail.MailAddress mailfrom = new System.Net.Mail.MailAddress(mFrom);
System.Net.Mail.MailAddress mailto = new System.Net.Mail.MailAddress(mTo);
System.Net.Mail.MailMessage newmsg = new System.Net.Mail.MailMessage(mailfrom, mailto);
newmsg.IsBodyHtml = false;
if (mFile.Length > 2
&& File.Exists(mFile))
{
System.Net.Mail.Attachment att = new System.Net.Mail.Attachment(mFile);
newmsg.Attachments.Add(att);
}
newmsg.Subject = mSub;
newmsg.Body = mMsg;
System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("smtp.gmail.com", 587);
smtp.UseDefaultCredentials = false;
smtp.Credentials = new System.Net.NetworkCredential(mFrom, mPass);
smtp.EnableSsl = true;
smtp.Send(newmsg);
newmsg.Dispose();
GC.Collect();
sql = "OK";
if (isDel
&& File.Exists(mFile))
{
File.Delete(mFile);
}
}
catch (Exception ex)
{
sql = ex.Message;
}
return sql;
}
此代码适用于小文件。但我需要发送高达 1-2 GB 的大文件。为此该怎么办。