在电子邮件中发送内嵌图像
遇到问题通过电子邮件发送图像作为embedded式图像的正文。 图像文件显示为可用的附件，但内嵌图像部分只显示为红色x。
这是我到目前为止
LinkedResource inline = new LinkedResource(filePath); inline.ContentId = Guid.NewGuid().ToString(); MailMessage mail = new MailMessage(); Attachment att = new Attachment(filePath); att.ContentDisposition.Inline = true; mail.From = from_email; mail.To.Add(data.email); mail.Subject = "Client: " + data.client_id + " Has Sent You A Screenshot"; mail.Body = String.Format( "<h3>Client: " + data.client_id + " Has Sent You A Screenshot</h3>" + @"<img src=""cid:{0}"" />", inline.ContentId); mail.IsBodyHtml = true; mail.Attachments.Add(att); 尝试这个
string htmlBody = "<html><body><h1>Picture</h1><br><img src=\"cid:filename\"></body></html>"; AlternateView avHtml = AlternateView.CreateAlternateViewFromString (htmlBody, null, MediaTypeNames.Text.Html); LinkedResource inline = new LinkedResource("filename.jpg", MediaTypeNames.Image.Jpeg); inline.ContentId = Guid.NewGuid().ToString(); avHtml.LinkedResources.Add(inline); MailMessage mail = new MailMessage(); mail.AlternateViews.Add(avHtml); Attachment att = new Attachment(filePath); att.ContentDisposition.Inline = true; mail.From = from_email; mail.To.Add(data.email); mail.Subject = "Client: " + data.client_id + " Has Sent You A Screenshot"; mail.Body = String.Format( "<h3>Client: " + data.client_id + " Has Sent You A Screenshot</h3>" + @"<img src=""cid:{0}"" />", inline.ContentId); mail.IsBodyHtml = true; mail.Attachments.Add(att);
embedded图像的最小c＃代码可以是：
MailMessage mailWithImg = getMailWithImg(); MySMTPClient.Send(mailWithImg); //* Set up your SMTPClient before! private MailMessage getMailWithImg() { MailMessage mail = new MailMessage(); mail.IsBodyHtml = true; mail.AlternateViews.Add(getEmbeddedImage("c:/image.png")); mail.From = new MailAddress("yourAddress@yourDomain"); mail.To.Add("recipient@hisDomain"); mail.Subject = "yourSubject"; return mail; } private AlternateView getEmbeddedImage(String filePath) { LinkedResource res = new LinkedResource(filePath); res.ContentId = Guid.NewGuid().ToString(); string htmlBody = @"<img src='cid:" + res.ContentId + @"'/>"; AlternateView alternateView = AlternateView.CreateAlternateViewFromString(htmlBody, null, MediaTypeNames.Text.Html); alternateView.LinkedResources.Add(res); return alternateView; }
protected void Page_Load(object sender, EventArgs e) { string Themessage = @"<html> <body> <table width=""100%""> <tr> <td style=""font-style:arial; color:maroon; font-weight:bold""> Hi! <br> <img src=cid:myImageID> </td> </tr> </table> </body> </html>"; sendHtmlEmail("from@gmail.com", "tomailaccount", Themessage, "Scoutfoto", "Test HTML Email", "smtp.gmail.com", 25); } protected void sendHtmlEmail(string from_Email, string to_Email, string body, string from_Name, string Subject, string SMTP_IP, Int32 SMTP_Server_Port) { //create an instance of new mail message MailMessage mail = new MailMessage(); //set the HTML format to true mail.IsBodyHtml = true; //create Alrternative HTML view AlternateView htmlView = AlternateView.CreateAlternateViewFromString(body, null, "text/html"); //Add Image LinkedResource theEmailImage = new LinkedResource("E:\\IMG_3332.jpg"); theEmailImage.ContentId = "myImageID"; //Add the Image to the Alternate view htmlView.LinkedResources.Add(theEmailImage); //Add view to the Email Message mail.AlternateViews.Add(htmlView); //set the "from email" address and specify a friendly 'from' name mail.From = new MailAddress(from_Email, from_Name); //set the "to" email address mail.To.Add(to_Email); //set the Email subject mail.Subject = Subject; //set the SMTP info System.Net.NetworkCredential cred = new System.Net.NetworkCredential("fromEmail@gmail.com", "fromEmail password"); SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587); smtp.EnableSsl = true; smtp.DeliveryMethod = SmtpDeliveryMethod.Network; smtp.UseDefaultCredentials = false; smtp.Credentials = cred; //send the email smtp.Send(mail); }
您需要将LinkedResource添加到AlternateView中
AlternateView alternateView = AlternateView.CreateAlternateViewFromString("<h3>Client: " + data.client_id + " Has Sent You A Screenshot</h3>" + @"<img src=""cid:{0}"" />", null, "text/html"); alternateView.LinkedResources.Add(inline); mail.AlternateViews.Add(alternateView);
MailMessage mail = new MailMessage(); //set the addresses mail.From = new MailAddress("userid@gmail.com"); mail.To.Add("userid@gmail.com"); //set the content mail.Subject = "Sucess Fully Sent the HTML and COntent of mail"; //first we create the Plain Text part string plainText = "Non HTML Plane Text Message for Non HTML enable mode"; AlternateView plainView = AlternateView.CreateAlternateViewFromString(plainText, null, "text/plain"); XmlTextReader reader = new XmlTextReader(@"E:\HTMLPage.htm"); string[] address = new string[30]; string finalHtml = ""; var i = -1; while (reader.Read()) { if (reader.NodeType == XmlNodeType.Element) { // The node is an element. if (reader.AttributeCount <= 1) { if (reader.Name == "img") { finalHtml += "<" + reader.Name; while (reader.MoveToNextAttribute()) { if (reader.Name == "src") { i++; address[i] = reader.Value; address[i] = address[i].Remove(0, 8); finalHtml += " " + reader.Name + "=" + "cid:chartlogo" + i.ToString(); } else { finalHtml += " " + reader.Name + "='" + reader.Value + "'"; } } finalHtml += ">"; } else { finalHtml += "<" + reader.Name; while (reader.MoveToNextAttribute()) { finalHtml += " " + reader.Name + "='" + reader.Value + "'"; } finalHtml += ">"; } } } else if (reader.NodeType == XmlNodeType.Text) { //Display the text in each element. finalHtml += reader.Value; } else if (reader.NodeType == XmlNodeType.EndElement) { //Display the end of the element. finalHtml += "</" + reader.Name; finalHtml += ">"; } } AlternateView htmlView = AlternateView.CreateAlternateViewFromString(finalHtml, null, "text/html"); LinkedResource[] logo = new LinkedResource[i + 1]; for (int j = 0; j <= i; j++) { logo[j] = new LinkedResource(address[j]); logo[j].ContentId = "chartlogo" + j; htmlView.LinkedResources.Add(logo[j]); } mail.AlternateViews.Add(plainView); mail.AlternateViews.Add(htmlView); SmtpClient smtp = new SmtpClient(); smtp.Host = "smtp.gmail.com"; smtp.Port = 587; smtp.Credentials = new NetworkCredential( "userid@gmail.com", "Password"); smtp.EnableSsl = true; Console.WriteLine(); smtp.Send(mail); }
尝试这个。
protected void Page_Load(object sender, EventArgs e) { string Themessage = @"<html> <body> <table width=""100%""> <tr> <td style=""font-style:arial; color:maroon; font-weight:bold""> Hi! <br> <img src=cid:myImageID> </td> </tr> </table> </body> </html>"; sendHtmlEmail("from@gmail.com", "tomailaccount", Themessage, "Scoutfoto", "Test HTML Email", "smtp.gmail.com", 25); }
protected void sendHtmlEmail(string from_Email, string to_Email, string body, string from_Name, string Subject, string SMTP_IP, Int32 SMTP_Server_Port) { //create an instance of new mail message MailMessage mail = new MailMessage(); //set the HTML format to true mail.IsBodyHtml = true; //create Alrternative HTML view AlternateView htmlView = AlternateView.CreateAlternateViewFromString(body, null, "text/html"); //Add Image LinkedResource theEmailImage = new LinkedResource("E:\\IMG_3332.jpg"); theEmailImage.ContentId = "myImageID"; //Add the Image to the Alternate view htmlView.LinkedResources.Add(theEmailImage); //Add view to the Email Message mail.AlternateViews.Add(htmlView); //set the "from email" address and specify a friendly 'from' name mail.From = new MailAddress(from_Email, from_Name); //set the "to" email address mail.To.Add(to_Email); //set the Email subject mail.Subject = Subject; //set the SMTP info System.Net.NetworkCredential cred = new System.Net.NetworkCredential("fromEmail@gmail.com", "fromEmail password"); SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587); smtp.EnableSsl = true; smtp.DeliveryMethod = SmtpDeliveryMethod.Network; smtp.UseDefaultCredentials = false; smtp.Credentials = cred; //send the email smtp.Send(mail); }
除了上面的评论，我还有以下的补充评论：
- 不要混合使用附件和AlternativeView，或使用其他。 如果将它们混合在一起，则内联附件将呈现为未知下载。
- 虽然Outlook和Google允许使用标准的HTML风格的
"cid:att-001"但这不适用于iPhone（2016年末补丁程序级别），而是使用纯字母数字"cid:att-001" -> "cid:att001"
作为旁白。 Outlook（甚至Office 2015）呈现（仍然是商业用户的绝大多数）需要使用TABLE TR TD样式HTML，因为它不能完全支持HTML框模型。
发送2图像vb.net代码转换为C＃在线转换器。
Public Function SendEmail(Optional ByVal p_AsHTML As Boolean = False, Optional ByVal p_themEmail As String = "") As Boolean Dim client As SmtpClient = New SmtpClient ''("FMSERVER.FMINNOVATIONS.COM.AU") 'Dim fromAddress As MailAddress = New MailAddress(Me.FromEmail, "WSMenterprise") 'Dim toAddress As MailAddress Try Dim aMessage As New MailMessage() '(New MailAddress(Me.FromEmail, "WSMenterprise"), New MailAddress(anAdd)) If _fromAddress IsNot Nothing Then If _fromName IsNot Nothing Then aMessage.From = New MailAddress(_fromAddress, _fromName) Else aMessage.From = New MailAddress(_fromAddress) End If End If For Each anAdd As String In _To aMessage.To.Add(New MailAddress(anAdd)) Next For Each cc As String In _CC aMessage.CC.Add(New MailAddress(cc)) Next For Each bcc As String In _BCC aMessage.Bcc.Add(New MailAddress(bcc)) Next aMessage.Subject = _Subject aMessage.IsBodyHtml = p_AsHTML If _EmailLogo Is Nothing Then aMessage.Body = _Body Else If p_themEmail.ToString().ToLower.Contains("dexus") Then Dim htmlView = AlternateView.CreateAlternateViewFromString(_Body.ToString(), Nothing, "text/html") Dim logo As New LinkedResource(_EmailLogo) logo.ContentId = "Dexuslogo1" Dim logo1 As New LinkedResource(_EmailLogo1) logo1.ContentId = "Dexuslogo2" htmlView.LinkedResources.Add(logo) htmlView.LinkedResources.Add(logo1) aMessage.AlternateViews.Add(htmlView) Else Dim htmlView = AlternateView.CreateAlternateViewFromString(_Body.ToString(), Nothing, "text/html") Dim logo As New LinkedResource(_EmailLogo) logo.ContentId = "companylogo" htmlView.LinkedResources.Add(logo) aMessage.AlternateViews.Add(htmlView) End If End If For Each anAttach As Attachment In _Attachments aMessage.Attachments.Add(anAttach) Next If _ReplyTo IsNot Nothing Then aMessage.ReplyToList.Add(New MailAddress(_ReplyTo)) client.Host = "smtpi.cbre.com.au" client.UseDefaultCredentials = True client.Send(aMessage) Catch exRecipUnk As SmtpFailedRecipientException Return False Catch exSmtp As SmtpException ''exSmtp.StatusCode Return False Catch ex As Exception Return False End Try Return True End Function If p_Gmap_code = "DE" Then Dim p_Theme As New Theme("Dexus") Dim passwordlink As String = "" Dim DexuslogoImage1 As String = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Images\Dexus_Notice_Logo.png") Dim DexuslogoImage2 As String = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Images\DexusTenantNotice.png") passwordlink = "<a href='" + p_Theme.TenantLoginPage + "?accesstype=email&te=" + a.Encrypt(p_TenantEmail) + "' target='_blank'>here.</a><br/>" bodys += "<div align='Center'><table border='0' cellpadding='0' cellspacing='0'><tr style='height:50px;'><td width='623px' ></td><td valign='top' width='180'><p align='right'><a href='http://www.dexus.com/'><img border='0' height='50' src=cid:Dexuslogo1 width='174' alt=''/></a></p></td></tr><tr><td colspan='2' width='803' style='height:25px;'></td></tr> <tr><td width='623px'><p align='left' style='font-family:Arial;font-size:14pt;'><strong> Your Dexus Response Password is about to expire</strong></p></td>" bodys += " <td width='180'><p align='right' style='font-family:Arial;font-size:10pt;'>" + DateTime.Now.ToString("dd/MM/yyyy") + " </p>" bodys += "</td></tr><tr><td colspan='2' width='803' style='height:30px;'> </td></tr> <tr> <td colspan='2' width='803' style='font-family:Arial;font-size:10pt;'>" bodys += "<p>" + wishes + " " + p_TenantName.Trim().ToString() + "</p>" bodys += "</td></tr><tr><td colspan='2' width='803' style='height:25px;'></td> </tr><tr><td colspan='2' width='803' style='font-family:Arial;font-size:10pt;'>" bodys += "Your Dexus Response password is about to expire in " + p_remaindays.ToString() + " days.<br /><br /> To reset your password and update your details, please click " + passwordlink.ToString() + "<br /><br />Please note that if you do not update your password by " + p_date + ",then your account will be set to inactive and you will not be able to access Dexus Response.</br></br>Please contact Dexus Response if you require assistance in accessing the portal.</p></td>" 'edit bodys += " </tr><tr><td colspan='2' width='803' style='height:30px;'></td></tr><tr><td colspan='2' width='803'><table align='left' border='0' cellpadding='0' cellspacing='0'><tr><td width='802' style='font-family:Arial;font-size:10pt;'><p><strong>Dexus Response</strong></p></td></tr><tr><td width='802' style='font-family:Arial;font-size:10pt;'><p><a href='mailto:property.services@dexusfm.com'>property.services@dexusfm.com</a> <strong>|</strong> 1300 339 870 <strong>|</strong> <a href='https://response.dexus.com/'>response.dexus.com</a></p></td></tr></table></td></tr><tr><td colspan='2' width='803' style='height:15px;'></td></tr><tr> <td colspan='2' width='803'><p> </p><p><a href='https://response.dexus.com/' border='0' target='_blank'><img border='0' height='133'" bodys += "src=cid:Dexuslogo2 alt='' width='800' /></a></p></td></tr><tr><td colspan='2' width='803' style='height:10px;'></td></tr><tr><td colspan='2' width='803' style='font-family:Arial;font-size:10pt;'><p><a href='http://www.dexus.com/who-we-are/terms-and-conditions' style=' color:#000000;'>Terms and Conditions</a><strong> | </strong><a href='http://www.dexus.com/who-we-are/privacy-policy' style=' color:#000000;'> Privacy Policy</a></p></td></tr><tr><td colspan='2' width='803' style='height:40px;'></td></tr><tr><td colspan='2' width='803'><p></p></td></tr><tr><td colspan='2' width='803' style='height:10px;'></td></tr><tr></tr><tr><td colspan='2' width='803' style='height:20px;'></td></tr></table></div>" email = New Common.Email(emailHeading, bodys, p_Theme.EmailFrom, DexuslogoImage1, DexuslogoImage2) email.ToEmail = p_TenantEmail email.SendEmail(True, p_Theme.EmailFrom)
一个更简约的例子：
var linkedResource = new LinkedResource(@"C:\Image.jpg", MediaTypeNames.Image.Jpeg); // My mail provider would not accept an email with only an image, adding hello so that the content looks less suspicious. var htmlBody = $"hello<img src=\"cid:{linkedResource.ContentId}\"/>"; var alternateView = AlternateView.CreateAlternateViewFromString(htmlBody, null, MediaTypeNames.Text.Html); alternateView.LinkedResources.Add(linkedResource); var mailMessage = new MailMessage { From = new MailAddress("youremail@host.com"), To = { "recipient@host.com" }, Subject = "yourSubject", AlternateViews = { alternateView } }; var smtpClient = new SmtpClient(); smtpClient.Send(mailMessage);
另一种解决方法是将图像作为附件添加，然后使用cid引用它的html代码。 HTML代码：
<html> <head> </head> <body> <img width=100 height=100 id=""1"" src=""cid:Logo.jpg""> </body> </html>
C＃代码：
EmailMessage email = new EmailMessage(service); email.Subject = "Email with Image"; email.Body = new MessageBody(BodyType.HTML, html); email.ToRecipients.Add("abc@xyz.com"); string file = @"C:\Users\acv\Pictures\Logo.jpg"; email.Attachments.AddFileAttachment("Logo.jpg", file); email.Attachments[0].IsInline = true; email.Attachments(0).ContentId = "Logo.jpg"; email.SendAndSaveCopy();
