将图像添加到System.Net.Mail消息

我的解决方案中有一些存储在Resources.resx文件中的图像。 我想在我的电子邮件中使用这些图片。 我已将图像加载到变量中：

Bitmap myImage = new Bitmap(Resources.Image); 

现在我想把它放在我用来创建HTML电子邮件的AlternateView字符串的HTML中。 只是需要一些帮助。

这是HTML字符串（部分）：

  body += "
 

任何帮助将不胜感激谢谢！

编辑：这是整个代码块。 我认为我接近它，只是缺乏经验阻碍这里:)我尝试将其转换为类似建议的字节让我更远。 仍然没有渲染图像。 这里有些东西我做得不对。 非常感谢大家帮助大家！ 这是代码（图像所需的HTML在字符串体的3行=代码中）：

  if (emailTo != null) { Bitmap myImage = new Bitmap(Resources.comcastHeader); ImageConverter ic = new ImageConverter(); Byte[] ba = (Byte[])ic.ConvertTo(myImage, typeof(Byte[])); MemoryStream image1 = new MemoryStream(ba); LinkedResource headerImage = new LinkedResource(image1, "image/jpeg"); headerImage.ContentId = "companyLogo"; System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage(); message.To.Add("" + emailTo + ""); message.Subject = "" + customer + " Your order is being processed..."; message.From = new System.Net.Mail.MailAddress("noreply@https://stackoverflow.com/questions/19910871/adding-image-to-system-net-mail-message/stormcopper.com"); string body = ""; body += ""; body += "
Hello " + customer + ",
Thank you for shopping at https://stackoverflow.com/questions/19910871/adding-image-to-system-net-mail-message/" + store + ". Your order is being processed and will be shipped to you soon. We would like to take this time to thank you for choosing Storm Copper Components, and we hope you are completely satisfied with your purchase. Please review your information and make sure all the information is correct. If there are any errors in your order, please contact us immediately here.
"; body += "
Here is your order information:
"; body += "
Contact Information
Name: " + customer + "
Address: " + street + " " + city + ", " + state + " " + zip + "
Email: " + emailTo + "
Phone: " + phone + "
"; body += "
Products Ordered
" + productInformation + "

"; body += "
Pricing Information

Subtotal: $" + subTotal + "
Shipping: $" + shippingInfo + " 
Tax: $" + taxInfo + "
Total: $" + total + "
"; body += "
Thank you for shopping with us!
Storm Copper Components"; body += "
This is an Auto-Generated email sent by store copper. Your email will not be sent to Storm Copper Components if you reply to this message. If you need to change any information, or have any questions about your order, please contact us using the information provided in this email.
"; ContentType mimeType = new System.Net.Mime.ContentType("text/html"); AlternateView alternate = AlternateView.CreateAlternateViewFromString(body, mimeType); message.AlternateViews.Add(alternate); System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("########"); smtp.Send(message); } 

Answer 1

您需要将它们作为CID /链接资源添加到电子邮件中。

这是我之前使用过的一些代码很好的代码。 我希望这会给你一些指导：

创建一个AlternateView ：

 AlternateView av = AlternateView.CreateAlternateViewFromString(body, null, isHTML ? System.Net.Mime.MediaTypeNames.Text.Html : System.Net.Mime.MediaTypeNames.Text.Plain) 

创建链接资源：

 LinkedResource logo = new LinkedResource("SomeRandomValue", System.Net.Mime.MediaTypeNames.Image.Jpeg); logo.ContentId = currentLinkedResource.Key; logo.ContentType = new System.Net.Mime.ContentType("image/jpg"); 

//将其添加到备用视图中

 av.LinkedResources.Add(logo); 

//最后，在邮件中添加备用视图：

 msg.AlternateView.Add(av); 

这里有一些文档可以帮助您了解AlternativeView和LinkedResources是什么以及它是如何工作的：

http://msdn.microsoft.com/en-us/library/system.net.mail.mailmessage.alternateviews(v=vs.110).aspx http://msdn.microsoft.com/en-us/library/ system.net.mail.linkedresource（v = vs.110）.aspx http://msdn.microsoft.com/en-us/library/ms144669(v=vs.110).aspx

在HTML本身中，您需要执行以下操作：

 ""; 

注意CID后面跟着一个字符串格式{0} – 我然后用它来替换一个随机值。

UPDATE

回去评论海报评论……这是海报的工作解决方案：

 string body = "blah blah blah... body goes here with the image tag: "; byte[] reader = File.ReadAllBytes("E:\\TestImage.jpg"); MemoryStream image1 = new MemoryStream(reader); AlternateView av = AlternateView.CreateAlternateViewFromString(body, null, System.Net.Mime.MediaTypeNames.Text.Html); LinkedResource headerImage = new LinkedResource(image1, System.Net.Mime.MediaTypeNames.Image.Jpeg); headerImage.ContentId = "companyLogo"; headerImage.ContentType = new ContentType("image/jpg"); av.LinkedResources.Add(headerImage); System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage(); message.AlternateViews.Add(av); message.To.Add(emailTo); message.Subject = " Your order is being processed..."; message.From = new System.Net.Mail.MailAddress("[e-mail]"); ContentType mimeType = new System.Net.Mime.ContentType("text/html"); AlternateView alternate = AlternateView.CreateAlternateViewFromString(body, mimeType); message.AlternateViews.Add(alternate); 

//然后发送消息！

Answer 2

一个选项是将图像放在一个主机中，并在src中放置url，就像这样“src =’ http://www.host/myImage.jpg ‘”这样你就不必在每个邮件中加载图像了而且会更敏捷。

Answer 3

如果它对任何人有帮助，这里有一个基于Ahmed ilyas非常有用的答案的版本 ，它将实际的Bitmap传递给内存流，并包含using块实现IDisposable的各种对象 –

 public void SendMailExample(string emailAddressTo, string hexColour) { // Give the LinkedResource an ID which should be passed into the 'cid' of the  tag - var linkedResourceId = "mylogo"; var sb = new StringBuilder(""); sb.Append("
This is the HTML email body with img tag...

"); sb.Append($""); sb.Append("
"); var emailBodyHtml = sb.ToString(); var emailBodyPlain = "This is the plain text email body"; using (var message = new MailMessage()) using (var logoMemStream = new MemoryStream()) using (var altViewHtml = AlternateView.CreateAlternateViewFromString(emailBodyHtml, null, System.Net.Mime.MediaTypeNames.Text.Html)) using (var altViewPlainText = AlternateView.CreateAlternateViewFromString(emailBodyPlain, null, System.Net.Mime.MediaTypeNames.Text.Plain)) using (var client = new System.Net.Mail.SmtpClient(_smtpServer) { Port = 25, DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network, UseDefaultCredentials = false, EnableSsl = false }) { message.To.Add(emailAddressTo); message.From = new MailAddress(_emailAddressFrom); message.Subject = "This is the email subject"; // Assume that GetLogo() just returns a Bitmap (for my particular problem I had to return a logo in a specified colour, hence the hexColour parameter!) Bitmap logoBitmap = GetLogo(hexColour); logoBitmap.Save(logoMemStream, System.Drawing.Imaging.ImageFormat.Png); logoMemStream.Position = 0; using (LinkedResource logoLinkedResource = new LinkedResource(logoMemStream)) { logoLinkedResource.ContentId = linkedResourceId; logoLinkedResource.ContentType = new ContentType("image/png"); altViewHtml.LinkedResources.Add(logoLinkedResource); message.AlternateViews.Add(altViewHtml); message.AlternateViews.Add(altViewPlainText); client.Send(message); } } } 

Answer 4

我知道这是一个老post，但是如果有人仍在寻找答案（就像我做的那样），那么我有一个更简单的答案。

您可以使用LinkedResource对象的简单重载，该对象直接将文件路径作为参数。 因此无需将图像显式加载到内存流中。 当然，这个例子假设你有权访问磁盘上的图像 –

这是完整的function代码，对我有用 –

 public System.Net.Mail.AlternateView GetAlternateView(string MessageText, string LogoPath, bool bSilent) { try { MessageText += "
"; System.Net.Mail.AlternateView view = System.Net.Mail.AlternateView.CreateAlternateViewFromString(MessageText, null, "text/html"); System.Net.Mail.LinkedResource linked = new System.Net.Mail.LinkedResource(HttpContext.Current.Request.PhysicalApplicationPath + LogoPath); linked.ContentId = "SystemEmail_HTMLLogoPath"; view.LinkedResources.Add(linked); return view; } catch (Exception ex) { if (bSilent) return null; else throw ex; } } 

Answer 5

您不应该将Bitmap对象分配给标记，因为它需要图像路径。
替换这个：

 body += "
 

有以下几点：

 body += "