c# - 在电子邮件正文中发送图像，Android 作为客户端，Asp.net c# 作为服务器端

Question

我正在开发一个 android 应用程序，我必须在其中发送用户的图像

在电子邮件正文中。我正在以字节数组的形式将图像数据发送到服务器端

来 self 的安卓代码。我对 asp.net 和 C# 了解不多，

所以有人可以告诉我我应该怎么做吗？

虽然我管理了在电子邮件正文中发送文本的代码，但这里是代码。

protected void Page_Load(object sender, EventArgs e)
    {   
     try
        {

             var c = HttpContext.Current;
              var emailID = c.Request["emailID"];
              var passwordToSend = c.Request["password"];
            SmtpClient client = new SmtpClient("smtpserver", portno);
            client.EnableSsl = false;
            client.UseDefaultCredentials = false;
            client.Credentials = new NetworkCredential("########", "########");

            MailMessage messageBody = new MailMessage("#########", emailID);
            messageBody.Subject = "FORGOTTEN PASSWORD";
            messageBody.Body = passwordToSend;
            messageBody.IsBodyHtml = true;
            client.Send(messageBody);
            Response.Write("$success$");
           // return "true";
        }
        catch (Exception ex)
        {
             Response.Write("$fail$");
            Response.Write(ex.Message);
        }
    }

但我无法理解如何在页面加载事件中发送电子邮件正文中的图像。

请提供服务器端代码。

Answer 1

您可以简单地使用 cid 来链接资源。

static void SendMailWithEmbededImages()
{
//create the mail message
MailMessage mail = new MailMessage();

//set the addresses
mail.From = new MailAddress("me@mycompany.com");
mail.To.Add("you@yourcompany.com");

//set the content
mail.Subject = "This is an email";

//first we create the Plain Text part
AlternateView plainView = AlternateView.CreateAlternateViewFromString("This is my plain text content, viewable by those clients that don't support html", null, "text/plain");

//then we create the Html part
//to embed images, we need to use the prefix 'cid' in the img src value
//the cid value will map to the Content-Id of a Linked resource.
//thus <img src='cid:companylogo'> will map to a LinkedResource with a ContentId of 'companylogo'
AlternateView htmlView = AlternateView.CreateAlternateViewFromString("Here is an embedded image.<img src=cid:companylogo>", null, "text/html");

//create the LinkedResource (embedded image)
LinkedResource logo = new LinkedResource( "c:\\temp\\logo.gif" );
logo.ContentId = "companylogo";
//add the LinkedResource to the appropriate view
htmlView.LinkedResources.Add(logo);

//add the views
mail.AlternateViews.Add(plainView);
mail.AlternateViews.Add(htmlView);


//send the message
SmtpClient smtp = new SmtpClient("127.0.0.1"); //specify the mail server address
smtp.Send(mail);
}