将雅虎电子邮件发送到多个地址[重复]

Question

我正在使用此代码从雅虎发送电子邮件。

  string smtpAddress = "smtp.mail.yahoo.com";
        int portNumber = 587;
        bool enableSSL = true;

        string emailFrom = "mitshel@yahoo.com";
        string password = "xxxxxx!";
        string emailTo = "dimitris.chris@yahoo.com"; 
        string subject = "Hello";
        string body = "Hello, I'm just writing this to say Hi!";

        using (MailMessage mail = new MailMessage())
        {
            mail.From = new MailAddress(emailFrom);
            mail.To.Add(emailTo);
            mail.Subject = subject;
            mail.Body = body;
            mail.IsBodyHtml = true;
            // Can set to false, if you are sending pure text.


            using (SmtpClient smtp = new SmtpClient(smtpAddress, portNumber))
            {
                smtp.Credentials = new NetworkCredential(emailFrom, password);
                smtp.EnableSsl = enableSSL;
                smtp.Send(mail);

但如果我想添加更多电子邮件地址怎么办？我试过这个，但我得到一个错误：

 string emailTo = "mitsoshellas@yahoo.com" ,"dimitris.christoforidis@hotmail.com" ;

Answer 1

    string smtpAddress = "smtp.mail.yahoo.com";
    int portNumber = 587;
    bool enableSSL = true;

    string emailFrom = "mitshel@yahoo.com";
    string password = "xxxxxx!";
    List<string> emailToList = new List<string>;
    emailToList.Add("dimitris.chris@yahoo.com");
    //add as many other as you like 
    string subject = "Hello";
    string body = "Hello, I'm just writing this to say Hi!";

    using (MailMessage mail = new MailMessage())
    {
        mail.From = new MailAddress(emailFrom);
        foreach(string recipient in emailToList){
            mail.To.Add(recipient);
        }
        mail.Subject = subject;
        mail.Body = body;
        mail.IsBodyHtml = true;
        // Can set to false, if you are sending pure text.


        using (SmtpClient smtp = new SmtpClient(smtpAddress, portNumber))
        {
            smtp.Credentials = new NetworkCredential(emailFrom, password);
            smtp.EnableSsl = enableSSL;
            smtp.Send(mail);
         }

或

    string smtpAddress = "smtp.mail.yahoo.com";
    int portNumber = 587;
    bool enableSSL = true;

    string emailFrom = "mitshel@yahoo.com";
    string password = "xxxxxx!";
    List<string> emailToList = new List<string>;
    emailToList.Add("dimitris.chris@yahoo.com");
    //add as many other as you like 
    string subject = "Hello";
    string body = "Hello, I'm just writing this to say Hi!";
    foreach(string recipient in emailToList){
    using (MailMessage mail = new MailMessage())
    {
        mail.From = new MailAddress(emailFrom);
        mail.To.Add(recipient);

        mail.Subject = subject;
        mail.Body = body;
        mail.IsBodyHtml = true;
        // Can set to false, if you are sending pure text.


        using (SmtpClient smtp = new SmtpClient(smtpAddress, portNumber))
        {
            smtp.Credentials = new NetworkCredential(emailFrom, password);
            smtp.EnableSsl = enableSSL;
            smtp.Send(mail);
         }
}

Answer 2

我假设您有一个包含多个电子邮件地址的字符串，由逗号和空格分隔，例如

string emailTo = "someEmail@email.com, someEmail2@email.com, someEmail3@email.com";

您需要将emailTo 分隔成一个字符串集合。为此，您可以使用以下方法：

// Separate the emailTo string into a list of email addresses
List<string> emailAddresses = new List<string>();

    int startingIndex = 0;
    while (startingIndex < emailTo.Length)
    {
        int commaIndex = emailTo.IndexOf(",", i);
        if (commaIndex != -1)
        {
            //Extract the email address
            string emailAddress = emailTo.Substring(startingIndex, commaIndex - startingIndex);

            // Remove the space following the comma
            if (emailAddress.Substring(0, 1) == " ")
            {
                emailAddress = emailAddress.Substring(1, emailAddress.Length - 1);
            }
            i = startingIndex + 1;
            result.Add(emaiAddress);
        }
    }

// Add each email address to the message's recipients
foreach(string emailAddress in emailAddresses)
{
    mail.To.Add(emailAddress);
}

这种方法的好处是您不必手动解析电子邮件地址并将它们自己添加到收件人列表中，以防您有一个包含emailTo字符串>许多电子邮件地址。