Untitled

Dim EM As System.Net.Mail.MailMessage = New System.Net.Mail.MailMessage(txtFrom.Text, txtTo.Text)
        Dim A As System.Net.Mail.Attachment = New System.Net.Mail.Attachment(txtImagePath.Text)
        Dim RGen As Random = New Random()
        A.ContentId = RGen.Next(100000, 9999999).ToString()
        EM.Attachments.Add(A)
        EM.Subject = txtSubject.Text
        EM.Body = "<body>" + txtBody.Text + "<br><img src='cid:" + A.ContentId +"'></body>"
        EM.IsBodyHtml = True
        Dim SC As System.Net.Mail.SmtpClient = New System.Net.Mail.SmtpClient(txtSMTPServer.Text)
        SC.Send(EM)

string html = @"<html><body><img src=""cid:YourPictureId""></body></html>";
AlternateView altView = AlternateView.CreateAlternateViewFromString(html, null, MediaTypeNames.Text.Html);

LinkedResource yourPictureRes = new LinkedResource("yourPicture.jpg", MediaTypeNames.Image.Jpeg);
yourPictureRes.ContentId = "YourPictureId";
altView.LinkedResources.Add(yourPictureRes);

MailMessage mail = new MailMessage();
mail.AlternateViews.Add(altView);

<div>
    <asp:LinkButton ID="emailTestLnkBtn" runat="server" OnClick="sendHTMLEmail">testemail</asp:LinkButton>
</div>

protected void sendHTMLEmail(object s, EventArgs e)
{
    /* adapted from http://stackoverflow.com/questions/1113345/sending-mail-along-with-embedded-image-using-asp-net
       and http://stackoverflow.com/questions/886728/generating-html-email-body-in-c-sharp */

    string myTestReceivingEmail = "yourEmail@address.com"; // your Email address for testing or the person who you are sending the text to.
    string subject = "This is the subject line";
    string firstName = "John";
    string mobileNo = "07711 111111";

    // Create the message.
    var from = new MailAddress("emailFrom@address.co.uk", "displayed from Name");
    var to = new MailAddress(myTestReceivingEmail, "person emailing to's displayed Name");
    var mail = new MailMessage(from, to);
    mail.Subject = subject;

    // Perform replacements on the HTML file (which you're using as a template).
    var reader = new StreamReader(@"c:TempHTMLfile.htm");
    string body = reader.ReadToEnd().Replace("%TEMPLATE_TOKEN1%", firstName).Replace("%TEMPLATE_TOKEN2%", mobileNo); // and so on as needed...

    // replaced this line with imported reader so can use a templete ....
    //string html = body; //"<html><body>Text here <br/>- picture here <br /><br /><img src=""cid:SACP_logo_sml.jpg""></body></html>";

    // Create an alternate view and add it to the email. Can implement an if statement to decide which view to add //
    AlternateView altView = AlternateView.CreateAlternateViewFromString(body, null, MediaTypeNames.Text.Html);

    // Logo 1 //
    string imageSource = (Server.MapPath("") + "\logo_sml.jpg");
    LinkedResource PictureRes = new LinkedResource(imageSource, MediaTypeNames.Image.Jpeg);
    PictureRes.ContentId = "logo_sml.jpg";
    altView.LinkedResources.Add(PictureRes);

    // Logo 2 //
    string imageSource2 = (Server.MapPath("") + "\booking_btn.jpg");
    LinkedResource PictureRes2 = new LinkedResource(imageSource2, MediaTypeNames.Image.Jpeg);
    PictureRes2.ContentId = "booking_btn.jpg";
    altView.LinkedResources.Add(PictureRes2);

    mail.AlternateViews.Add(altView);

    // Send the email (using Web.Config file to store email Network link, etc.)
    SmtpClient mySmtpClient = new SmtpClient();
    mySmtpClient.Send(mail);
}

<html>
<body>
    <img src="cid:logo_sml.jpg">
    <br />
    Hi %TEMPLATE_TOKEN1% .
    <br />
    <br/>
    Your mobile no is %TEMPLATE_TOKEN2%
    <br />
    <br />
    <img src="cid:booking_btn.jpg">
</body>
</html>

<system.net>
    <mailSettings>
        <smtp deliveryMethod="SpecifiedPickupDirectory" from="madeupEmail@address.com">
            <specifiedPickupDirectory pickupDirectoryLocation="C:TempMail"/>
        </smtp>
    </mailSettings>
</system.net>

using System.Net.Mail;
using System.Text;
using System.Reflection;
using System.Net.Mime; // need for mail message and text encoding
using System.IO;