How Can I Embed Images Directly into the Body of an Email Using C#?

Embedding Images in Email Bodies with C

Directly embedding images within the body of an email using C# requires a specific approach, as standard email attachments only display as placeholders. This refined C# code demonstrates how to correctly embed images:

<code class="language-csharp">MailMessage mailWithImg = GetMailWithImg();
MySMTPClient.Send(mailWithImg); // Ensure MySMTPClient is properly configured

private MailMessage GetMailWithImg() {
    MailMessage mail = new MailMessage();
    mail.IsBodyHtml = true;
    mail.AlternateViews.Add(GetEmbeddedImage("c:/image.png")); // Replace with your image path
    mail.From = new MailAddress("yourAddress@yourDomain"); // Replace with your email address
    mail.To.Add("recipient@hisDomain"); // Replace with recipient's email address
    mail.Subject = "yourSubject"; // Replace with your email subject
    return mail;
}

private AlternateView GetEmbeddedImage(String filePath) {
    LinkedResource res = new LinkedResource(filePath);
    res.ContentId = Guid.NewGuid().ToString();
    string htmlBody = $"<img src=\"cid:{res.ContentId}\" />"; // Note the escaped quotes
    AlternateView alternateView = AlternateView.CreateAlternateViewFromString(htmlBody, null, MediaTypeNames.Text.Html);
    alternateView.LinkedResources.Add(res);
    return alternateView;
}</code>

This code leverages the AlternateView and LinkedResource classes. LinkedResource associates the image file with a unique ContentId. The HTML within AlternateView then references this ContentId, ensuring the image is displayed inline. This method prevents the common "red x" placeholder often seen with attached images. Remember to replace placeholder values with your actual data.

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