我正在使用NPOI创建excel工作簿并尝试将其作为附件发送到电子邮件中。我的代码如下:
var wb = new HSSFWorkbook();
//create the workbook
using(var ms = new MemoryStream())
{
wb.Write(ms);
var msg = new MailMessage();
//create email
msg.Attachments.Add(new Attachment(ms, "Document.xls", "application/vnd.ms-excel"));
client.Send(msg);
}
我已经排除了创建工作簿的代码,我已经过测试以确保它可以正常工作(我可以保存文件并打开它而不会出现问题)但是如果你想查看任何内容请咨询。 client
只是我的SmtpClient
。
电子邮件发送没有问题,附件以Document.xls(如预期的那样)出现,但是当我打开它时,我收到以下消息(在Excel 2010中),当我单击“是”打开时,工作表是空白的。
The file you are trying to open, 'Document.xls', is in a differrent format than specified by the file extension. Verify that the file is not corrupted and is from a trusted source before opening the file. Do you want to open the file now?
据我所知,我正在指定格式。有谁看到我做错了什么?任何帮助将不胜感激。
答案 0 :(得分:7)
我终于明白了。在将Stream
传递给Attachment
之前,我需要将其位置设置为零。
ms.Position = 0;
就是这样!