C# 如何在gmail电子邮件中包含多个收件人？_C#_Email_Smtp_Mailmessage

C# 如何在gmail电子邮件中包含多个收件人？

c# email smtp

C# 如何在gmail电子邮件中包含多个收件人？,c#,email,smtp,mailmessage,C#,Email,Smtp,Mailmessage,我有这个工作代码，可以使用我的gmail帐户发送电子邮件： public static void SendEmail(string fullName, string toEmail, string HH, string HHEmailAddr) { var fromAddress = new MailAddress(FROM_EMAIL, FROM_EMAIL_NAME); var toAddress = new MailAddress(toEmail, fullName);

我有这个工作代码，可以使用我的gmail帐户发送电子邮件：

public static void SendEmail(string fullName, string toEmail, string HH, string HHEmailAddr)
{
    var fromAddress = new MailAddress(FROM_EMAIL, FROM_EMAIL_NAME);
    var toAddress = new MailAddress(toEmail, fullName);
    var toAddressHH = new MailAddress(HHEmailAddr, HH);
    string fromPassword = GMAIL_PASSWORD;

    List<String> htmlBody = new List<string>
    {
        "<html><body>",
        . . .
        "</body></html>"
    };
    var body = string.Join("", htmlBody.ToArray());

    var smtp = new SmtpClient
    {
        Host = "smtp.gmail.com",
        Port = 587,
        EnableSsl = true,
        DeliveryMethod = SmtpDeliveryMethod.Network,
        UseDefaultCredentials = false,
        Credentials = new NetworkCredential(fromAddress.Address, fromPassword)
    };
    using (var message = new MailMessage(fromAddress, toAddress)
    {
        Subject = subject,
        Body = body,
        IsBodyHtml = true
    })
    {
        smtp.Send(message);
    }
}

…从一个代码块发送两封电子邮件，但我真正想做的是：

List<MailAddress> recipients = new List<MailAddress>();
recipients.Add(toAddress);
recipients.Add(toAddressHH);
. . .
using (var message = new MailMessage(fromAddress, recipients)

messageHH.To.Add(new MailAddress("recipient1@domain.com","Recipient1 Name"));
messageHH.To.Add(new MailAddress("recipient2@domain.com","Recipient2 Name"));
messageHH.To.Add(new MailAddress("recipient3@domain.com","Recipient3 Name"));
//etc...

…我得到：

无效的初始值设定项成员声明符

…和：

当前上下文中不存在名称“To”

我通过以下排列得到相同的结果：

To.Add(new MailAddress("dplatypus@att.net", "Duckbilled Platypus"))

查看，您可以看到MailMessage.To属性是一个MailAddressCollection

具有一个Add（）方法，该方法将向集合追加值

有了这些信息，您可以尝试以下方法：

List<MailAddress> recipients = new List<MailAddress>();
recipients.Add(toAddress);
recipients.Add(toAddressHH);
. . .
using (var message = new MailMessage(fromAddress, recipients)

messageHH.To.Add(new MailAddress("recipient1@domain.com","Recipient1 Name"));
messageHH.To.Add(new MailAddress("recipient2@domain.com","Recipient2 Name"));
messageHH.To.Add(new MailAddress("recipient3@domain.com","Recipient3 Name"));
//etc...

我不得不改变声明的“风格”，但这是可行的：

var message = new MailMessage(fromAddress, toAddress);
message.Subject = subject;
message.Body = body;
message.To.Add(new MailAddress("dplatypus@att.net", "Duckbilled Platypus"));
message.To.Add(new MailAddress("duckbill@att.net", "Platypus 2"));
smtp.Send(message);

分别使用

message.To.Add（）

、

message.CC.Add（）

或

message.Bcc.Add（）

添加收件人。