将图像附加到我的电子邮件联系表单，但图像显示"文件为空" C#

Question

这是代码。。。

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Net.Mail;
using System.IO;
public partial class TestAttachSend : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }
    protected void btnSend_Click(object sender, EventArgs e)
    {
        if (fuImage.HasFile && fuImage.PostedFile.ContentType == System.Net.Mime.MediaTypeNames.Image.Jpeg)
        {
            SmtpClient emailClient = new SmtpClient();
            MailMessage EmailMsg = new MailMessage();
            EmailMsg.To.Add(txtEmail.Text.Trim());
            EmailMsg.From = new MailAddress(txtEmail.Text.Trim());
            EmailMsg.Subject = "Attached Image";
            EmailMsg.Body = "Image is attached!";
            MemoryStream imgStream = new MemoryStream();
            System.Drawing.Image img = System.Drawing.Image.FromStream(fuImage.PostedFile.InputStream);
            string filename = fuImage.PostedFile.FileName;
            img.Save(imgStream, System.Drawing.Imaging.ImageFormat.Jpeg);
            EmailMsg.Attachments.Add(new Attachment(imgStream, filename, System.Net.Mime.MediaTypeNames.Image.Jpeg));
            emailClient.Send(EmailMsg);
            lblSent.Visible = true;
        }
    }
}

这段代码可以正常工作。但当你打开电子邮件中的附加图像时，它会显示"文件为空"

有人能看到我哪里出错了吗？？？

此外，我想使用多种图像格式（gif，png）。但我不知道该怎么做。

Answer 1

尝试进行

imgStream.Seek(0L, SeekOrigin.Begin);

在将CCD_ 1传递给CCD_。