将文件从 MemoryStream 附加到 C# 中的 MailMessage

问题描述

我正在编写一个将文件附加到电子邮件的程序.目前我正在使用 FileStream 将文件保存到磁盘中，然后我使用

I am writing a program to attach a file to email. Currently I am saving file using FileStream into disk, and then I use

System.Net.Mail.MailMessage.Attachments.Add(
    new System.Net.Mail.Attachment("file name")); 

我不想将文件存储在磁盘中，我想将文件存储在内存中，然后从内存流中将其传递给 Attachment.

I do not want to store file in disk, I want to store file in memory and from memory stream pass this to Attachment.

推荐答案

这里是示例代码.

System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.IO.StreamWriter writer = new System.IO.StreamWriter(ms);
writer.Write("Hello its my sample file");
writer.Flush();
writer.Dispose();
ms.Position = 0;

System.Net.Mime.ContentType ct = new System.Net.Mime.ContentType(System.Net.Mime.MediaTypeNames.Text.Plain);
System.Net.Mail.Attachment attach = new System.Net.Mail.Attachment(ms, ct);
attach.ContentDisposition.FileName = "myFile.txt";

// I guess you know how to send email with an attachment
// after sending email
ms.Close();

编辑 1

您可以通过 System.Net.Mime.MimeTypeNames 指定其他文件类型，例如 System.Net.Mime.MediaTypeNames.Application.Pdf

You can specify other file types by System.Net.Mime.MimeTypeNames like System.Net.Mime.MediaTypeNames.Application.Pdf

根据 Mime 类型，您需要在 FileName 中指定正确的扩展名，例如 "myFile.pdf"

Based on Mime Type you need to specify correct extension in FileName for instance "myFile.pdf"

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