C# 我可以使用ASP.Net Core 3.0中的IEmailSender接口向多个收件人发送电子邮件吗

我是ASP.Net核心的初学者。实际上我正在使用ASP.NETCore3.0。我想向多个接收者发送电子邮件。我可以使用IEmailSender接口吗？或者有什么建议

我的IEmailSender实现如下：

public class EmailSender : IEmailSender
{
    private string host;
    private int port;
    private bool enableSSL;
    private string userName;
    private string password;

    public EmailSender(string host, int port, bool enableSSL, string userName, string password)
    {
        this.host = host;
        this.port = port;
        this.enableSSL = enableSSL;
        this.userName = userName;
        this.password = password;
    }

    public Task SendEmailAsync(string email, string subject, string htmlMessage)
    {
        var client = new SmtpClient(host, port)
        {
            Credentials = new NetworkCredential(userName, password),
            EnableSsl = enableSSL
        };
        return client.SendMailAsync(
            new MailMessage(userName, email, subject, htmlMessage) { IsBodyHtml = true }
        );
    }
}

---

有人能帮我吗？

邮件。收件人的类型如下。这意味着您可以使用

Add

方法添加多个收件人

MailMessage message = new MailMessage();
message.To.Add(new MailAddress("email1@evilcorp.com"));
message.To.Add(new MailAddress("email2@evilcorp.com"));

---

事实上我是用另一种方式做的。我会把它贴在这里，它会对某人有所帮助

我创建了一个名为“IExtendemailSender”的新接口，继承了“IEmailSender”接口

 public interface IExtendedEmailSender : IEmailSender
 {

 }

public class EmailSender : IExtendedEmailSender
{
    private string host;
    private int port;
    private bool enableSSL;
    private string userName;
    private string password;

    public EmailSender(string host, int port, bool enableSSL, string userName, 
    string password)
    {
        this.host = host;
        this.port = port;
        this.enableSSL = enableSSL;
        this.userName = userName;
        this.password = password;
    }


    public Task SendEmailAsync(string email, string subject, string htmlMessage)
    {
        var client = new SmtpClient(host, port)
        {
            Credentials = new NetworkCredential(userName, password),
            EnableSsl = enableSSL
        };
        return client.SendMailAsync(
            new MailMessage(userName, email, subject, htmlMessage) { IsBodyHtml = 
        true }
        );
    }


    public Task SendBulkEmailAsync(string[] emails, string subject, string 
      htmlMessage)
    {
        var client = new SmtpClient(host, port)
        {
            Credentials = new NetworkCredential(userName, password),
            EnableSsl = enableSSL
        };

        MailMessage mailMessage = new MailMessage();
        mailMessage.Body = htmlMessage;
        mailMessage.IsBodyHtml = true;
        mailMessage.Subject = subject;

        foreach (string emailAdress in emails)
        {
            if (CheckIsValiedEmailAddress(emailAdress))
               mailMessage.To.Add(emailAdress);
        }


        return client.SendMailAsync(mailMessage); ;
    }
}

为向多个接收者发送电子邮件创建新的抽象方法

public interface IExtendedEmailSender : IEmailSender
{
    Task SendBulkEmailAsync(string[] emails, string subject, string htmlMessage);
}

为检查邮件地址创建新方法

public static bool CheckIsValiedEmailAddress(string address)
{
    try
    {
        var addr = new System.Net.Mail.MailAddress(address);
        return addr.Address == address;
    }
    catch
    {
        return false;
    }
}

创建调用“EmailSender”的新类并实现“IExtendeMailSender”接口

 public interface IExtendedEmailSender : IEmailSender
 {

 }

public class EmailSender : IExtendedEmailSender
{
    private string host;
    private int port;
    private bool enableSSL;
    private string userName;
    private string password;

    public EmailSender(string host, int port, bool enableSSL, string userName, 
    string password)
    {
        this.host = host;
        this.port = port;
        this.enableSSL = enableSSL;
        this.userName = userName;
        this.password = password;
    }


    public Task SendEmailAsync(string email, string subject, string htmlMessage)
    {
        var client = new SmtpClient(host, port)
        {
            Credentials = new NetworkCredential(userName, password),
            EnableSsl = enableSSL
        };
        return client.SendMailAsync(
            new MailMessage(userName, email, subject, htmlMessage) { IsBodyHtml = 
        true }
        );
    }


    public Task SendBulkEmailAsync(string[] emails, string subject, string 
      htmlMessage)
    {
        var client = new SmtpClient(host, port)
        {
            Credentials = new NetworkCredential(userName, password),
            EnableSsl = enableSSL
        };

        MailMessage mailMessage = new MailMessage();
        mailMessage.Body = htmlMessage;
        mailMessage.IsBodyHtml = true;
        mailMessage.Subject = subject;

        foreach (string emailAdress in emails)
        {
            if (CheckIsValiedEmailAddress(emailAdress))
               mailMessage.To.Add(emailAdress);
        }


        return client.SendMailAsync(mailMessage); ;
    }
}

最后，“IEmailSender”的所有实例都替换为“IExtendemailSender”

if（email！=null&&！string.IsNullOrEmpty（email.Trim（））
{
var lst=新列表(
（email+“”）。拆分（“；”）。选择（tag=>tag.Trim（））。其中（tag=>！string.IsNullOrEmpty（tag））；
foreach（lst中的var s）
msg.AddTo（s）；
}

MailMessage的

To

字段是一个集合。请参见此处：您无法向其中添加多个MailAddress。如何将MailMessage集合传递给SendEmailAsync方法？如何将MailAddressCollection传递给SendEmailAsync方法？您不需要。您将邮件消息传递给SendEmailAsync方法，明白了。谢谢