我正在构建一个应用程序,我有义务创建一个 MailMessage (System.Net.mail.MailMessage) 并将其保存在磁盘上作为 .msg 扩展名而不是 .eml
以下是我用来将 MailMessage 保存为 .msg 文件的方法:
public static void Save(MailMessage Message, string FileName)
{
Assembly assembly = typeof(SmtpClient).Assembly;
Type _mailWriterType =
assembly.GetType("System.Net.Mail.MailWriter");
using (FileStream _fileStream =
new FileStream(FileName, FileMode.Create))
{
// Get reflection info for MailWriter contructor
ConstructorInfo _mailWriterContructor =
_mailWriterType.GetConstructor(
BindingFlags.Instance | BindingFlags.NonPublic,
null,
new Type[] { typeof(Stream) },
null);
// Construct MailWriter object with our FileStream
object _mailWriter =
_mailWriterContructor.Invoke(new object[] { _fileStream });
// Get reflection info for Send() method on MailMessage
MethodInfo _sendMethod =
typeof(MailMessage).GetMethod(
"Send",
BindingFlags.Instance | BindingFlags.NonPublic);
// Call method passing in MailWriter
_sendMethod.Invoke(
Message,
BindingFlags.Instance | BindingFlags.NonPublic,
null,
new object[] { _mailWriter, true },
null);
// Finally get reflection info for Close() method on our MailWriter
MethodInfo _closeMethod =
_mailWriter.GetType().GetMethod(
"Close",
BindingFlags.Instance | BindingFlags.NonPublic);
// Call close method
_closeMethod.Invoke(
_mailWriter,
BindingFlags.Instance | BindingFlags.NonPublic,
null,
new object[] { },
null);
}
}
但保存的 msg 文件无法打开,错误如下:“无法打开文件 xyz.msg。该文件可能不存在,您可能没有打开它的权限,或者它可能被其他程序打开......”
我的问题是:如何将System.Net.mail.MailMessage另存为msg文件?