错误无法将类型'string'隐式转换为System.Net.Mail.MailAddressCollection [英] error cannot implicitly convert type 'string' to System.Net.Mail.MailAddressCollection

问题描述

hi
i在c＃和asp.net工作

i希望发送邮件给某些人

我使用类和方法如下代码：

hi i work in c# and asp.net
i want to sent mail to some people
and i use class and method like below code:

using System.Net.Mail;

public void sendmail(string Subject, string ToEmail, string Body)
{
     SmtpClient MyMail = new SmtpClient();
     MailMessage MyMsg = new MailMessage();
     MyMail.Host = "webmail.tahasoft.net";

     MyMsg.To = ToEmail;

     MyMsg.Subject = Subject;
     MyMsg.SubjectEncoding = Encoding.UTF8;
     MyMsg.IsBodyHtml = true;
     MyMsg.From = new MailAddress("[e-mail]", "mysite");
     MyMsg.BodyEncoding = Encoding.UTF8;
     MyMsg.Body = Body;
     MyMail.UseDefaultCredentials = false;
     NetworkCredential MyCredentials = new NetworkCredential("[e-mail]", "mysite");
     MyMail.Credentials = MyCredentials;
     MyMail.Send(MyMsg);
}

当我向一个人发送一封电子邮件时它工作正常

但是当我发送ToEmail喜欢：

[e-mail]; [e-mail]; [e-mail]



i得到错误：

错误无法将类型''string''隐式转换为System.Net.Mail.MailAddressCollection

when i sent one email to one person it works fine
but when i sent ToEmail like to:
[e-mail];[e-mail];[e-mail]

i get error:
error cannot implicitly convert type ''string'' to System.Net.Mail.MailAddressCollection

推荐答案

您需要调用Add方法列表中的每个地址，您需要将它们转换为MailAddress对象：

You need to call the Add method for each address in your list, and you need to convert them to MailAddress objects:

mail.To.Add(new MailAddress(to));

在您的情况下，您可能希望将名称拆分为单独的字符串，然后添加它们：

In your case, you probably want to split the names into separate strings, and add them:

string[] tos = ToEmail.Split(';');
foreach (string to in tos)
   {
   mail.To.Add(new MailAddress(to));
   }

拆分字符串上的字符串'';''

Split the string on the char '';''

string[] Addresses = s.Split(';');

然后：

and then:

MailMessage msg = new MailMessage();
foreach (string address in Addresses)
   msg.To.Add(address);

干杯，

江户

Cheers,
Edo

用户以下代码向多个收件人发送电子邮件，

User following code to send email to multiple recipients,

MyMsg.To.Add(new System.Net.Mail.MailAddress(ToEmail));

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