Question

如果找到附件，我会收到带附件的电子邮件，然后将该电子邮件转发给某个用户。我使用以下代码来执行此操作。当我使用下面的代码时，它会发送带附件的电子邮件但附件没有内容（空白附件）。你能告诉我我错在哪里吗？

public bool AddAttachment(System.IO.Stream sm, string fileName)
    {
        try
        {
            System.Net.Mail.Attachment atch = new System.Net.Mail.Attachment(sm, fileName);
            msg.Attachments.Add(atch);
            return true;
        }
        catch (Exception ex)
        {
            TraceService(ex.Message + Environment.NewLine + Environment.NewLine + ex.StackTrace);
        }
        return false;
    }

 ObjMail.MsgData = strBuilder.ToString();
            for (int i = 0; i < sMail.Attachments.Length; i++)
            {
                if (!string.IsNullOrEmpty(sMail.Attachments[i].Name))
                {
                    if (!sMail.Attachments[i].Name.Contains(".dat"))
                    {
                        System.IO.MemoryStream ms = new System.IO.MemoryStream();
                        System.IO.StreamWriter writer = new System.IO.StreamWriter(ms);
                        var sr = new StreamReader(ms);
                        writer.Write(sMail.Attachments[i]);

                        ObjMail.AddAttachment(ms, sMail.Attachments[i].Name);
                    }
                }   
            }
ObjMail.SendMail();

Answer 1

要附加使用以下代码我已使用该示例附加JPG图像

Attachment attach = new Attachment(id + ".jpg");
attach.Name = "WhateverName.jpg";
mail.Attachments.Add(attach);

Answer 2

试试这个：

if (!string.IsNullOrEmpty(sMail.Attachments[i].Name))
                {
                    if (!sMail.Attachments[i].Name.Contains(".dat"))
                    {
                        System.IO.MemoryStream ms = new System.IO.MemoryStream();
                        sMail.Attachments[i].ContentStream.CopyTo(ms);

                        ObjMail.AddAttachment(ms, sMail.Attachments[i].Name);
                    }
                }

或者你可以使用简单的：

if (!string.IsNullOrEmpty(sMail.Attachments[i].Name))
                    {
                        if (!sMail.Attachments[i].Name.Contains(".dat"))
                        { 
                           ObjMail.Add(sMail.Attachments[i]);
                        }
                    }
ObjMail.SendMail();

如何从电子邮件的附件写附件？

2 个答案: