MailMessage 发送后删除附件 if in Path.GetTempPath()

MailMessage Delete attachments after sending if in Path.GetTempPath()

请原谅我对 MailMessage 和 SmtpClient 的陌生 类。我已经构建了一些基本可用的东西,但在准备发送附件时,我有时会将附件复制到临时文件位置 (Path.GetTempPath() + @"\" + timestampWithFF),因为有时必须压缩它们才能发送。发生这种情况时,我想确保在发送后删除那里的文件(特别是因为那里的任何东西都会相对较大)。

双重问题: 1. 我不应该清理文件因为 OS (win7) 会做得很好吗? 2. 如何获取client.SendCompleted中附件的硬盘位置?

client.SendCompleted += (s, e) =>
{
    client.Dispose();
    foreach(Attachment a in msg.Attachments)
    {
        // want to actually delete the file from the HDD if it's in Path.GetTempPath();
    }
    msg.Dispose();
};

我知道我可以使用 a.Dispose(),但我不知道它的作用...我怀疑它正在处理对象(无论如何 msg.Dispose 接下来都会做),但会将文件留在 HDD 上。

我必须单独发送附件的文件路径吗? client.SendCompleted() 行位于: sendMailAsync(SmtpClient client, MailMessage msg) 方法。我可以将其更改为: sendMailAsync(SmtpClient client, MailMessage msg, List<string> attachments) 并将其添加到 SendCompleted(),但感觉有点笨拙:

string tempDir = Path.GetTempPath();
foreach(string f in attachments)
{
    if(f.Contains(tempDir))    // want to actually delete the file from the HDD if it's in Path.GetTempPath();
    {
        if (File.Exists(f)) { File.Delete(f); }
    }
}
  1. should I not bother with cleaning up the files because the OS (win7) will do a good job of it?

如果我是你,我仍然会删除临时文件,尽管 OS 会在认为必要时清理它

  1. how can I get the HDD location of the Attachments in client.SendCompleted?

附件中的文件可以通过ContentStream取回。他们的类型是 FileStream

client.SendCompleted += (s, e) =>
{
    client.Dispose();
    var fileattachments = msg.Attachments
                          .Select(x => x.ContentStream)
                          .OfType<FileStream>()
                          .Select(fs => fs.Name)
                          .ToArray();

    msg.Dispose();

    string tempPath = Path.GetTempPath();
    foreach (var attachment in fileattachments )
    {
        if(attachment.Contains(tempPath)
        {
            File.Delete(attachment);
        }

    }
};

注:先处理msg对象再做删除