.net-如何發送郵件中文附件名無亂碼？

如何發送郵件中文附件名無亂碼？

發郵件中發附件那塊代碼如下：

 private void sendAttachmentHeader(string attachment)
        {
            string contentType = "application/octet-stream";//text/plain;
            string header = "--" + boundary_pro + "\r\n"
                    + "Content-Type:" + contentType + ";;name=" + System.IO.Path.GetFileName(attachment) + "\r\n"
                    + "Content-Transfer-Encoding:base64\r\n"
                    + "Content-Disposition:attachment;filename=\"" + System.IO.Path.GetFileName(attachment) + "\"\r\n";
            socketSend(header + "\r\n");
        }

發出去的郵件收取是如果是中文顯示 ???????.txt

如何發送才能正確顯示中文附件名？

最佳回答：

 attachment.NameEncoding = Encoding.GetEncoding("GB2312");

http://blog.csdn.net/joeblackzqq/article/details/2045680