由网友(我怀旧只因我看不到未来)分享简介：我使用的是下面的code，而且只发送一个电子邮件 - 我要发送邮件到多个地址。有关获得多个电子邮件使用：字符串的ConnectionString = ConfigurationManager.ConnectionStrings [email_data]的ConnectionString。OleDbConnection...

我使用的是下面的code，而且只发送一个电子邮件 - 我要发送邮件到多个地址

。

有关获得多个电子邮件使用：

 字符串的ConnectionString = ConfigurationManager.ConnectionStrings [email_data]的ConnectionString。
OleDbConnection的con100 =新的OleDbConnection（的connectionString）;
OleDbCommand的cmd100 =新的OleDbCommand（选择最前的bulk_tbl 3封电子邮件，con100）;
OleDbDataAdapter的DA100 =新OleDbDataAdapter的（cmd100）;
数据集DS100 =新的DataSet（）;
da100.Fill（DS100）;

    的for（int i = 0; I＆LT; ds100.Tables [0] .Rows.Count;我++）
    //尝试
    {
        串all_emails = ds100.Tables [0] .Rows [I] [0]的ToString（）;
        {
            串allmail = all_emails +;;
            Session.Add（ad_emails，allmail）;
            回复于（会话[ad_emails]）;
            发送邮件（）;
        }
    }
 

和发送我使用的电子邮件：

 字符串SENDTO =会话[ad_emails]的ToString（）。

MailMessage消息=新MailMessage（info@abc.com，SENDTO，主题，身体）;
SmtpClient emailCli​​ent =新SmtpClient（mail.smtp.com）;
System.Net.NetworkCredential SMTPUserInfo =新System.Net.NetworkCredential（ABC，ABC）;
emailCli​​ent.UseDefaultCredentials = TRUE;
emailCli​​ent.Credentials = SMTPUserInfo;
emailCli​​ent.Send（消息）;
 

解决方案

现在的问题是，你是提供用分号分隔的 MailMessage 构造函数的地址列表当只需要一个字符串，再presenting单个地址：

  

这包含了电子邮件的收件人。

的地址的字符串

或者可能以逗号分隔的列表（见下文）。

来源

要指定多个地址，您需要使用To属性是一个MailAddressCollection,尽管这些页面上的例子没有表现得很清楚：

  message.To.Add（one@example.com，two@example.com））;
 

  

电子邮件地址添加到MailAddressCollection。多个电子邮件地址必须以逗号分隔（）。

MSDN页面

因此​​创造了 MailMessage 与逗号的分隔列表应该工作。

I am using the below code, and it only sends one email - I have to send the email to multiple addresses.

For getting more than one email I use:

string connectionString = ConfigurationManager.ConnectionStrings["email_data"].ConnectionString;
OleDbConnection con100 = new OleDbConnection(connectionString);
OleDbCommand cmd100 = new OleDbCommand("select top 3 emails  from bulk_tbl", con100);
OleDbDataAdapter da100 = new OleDbDataAdapter(cmd100);
DataSet ds100 = new DataSet();
da100.Fill(ds100);

    for (int i = 0; i < ds100.Tables[0].Rows.Count; i++)
    //try
    {
        string all_emails = ds100.Tables[0].Rows[i][0].ToString();
        {
            string allmail = all_emails + ";";
            Session.Add("ad_emails",allmail);
            Response.Write(Session["ad_emails"]);
            send_mail();
        }
    }

and for sending the email I use:

string sendto = Session["ad_emails"].ToString();

MailMessage message = new MailMessage("info@abc.com", sendto, "subject", "body");
SmtpClient emailClient = new SmtpClient("mail.smtp.com");
System.Net.NetworkCredential SMTPUserInfo = new System.Net.NetworkCredential("abc", "abc");
emailClient.UseDefaultCredentials = true;
emailClient.Credentials = SMTPUserInfo;
emailClient.Send(message);

解决方案

The problem is that you are supplying a list of addresses separated by semi-colons to the MailMessage constructor when it only takes a string representing a single address:

A String that contains the address of the recipient of the e-mail message.

or possibly a list separated by commas (see below).

Source

To specify multiple addresses you need to use the To property which is a MailAddressCollection, though the examples on these pages don't show it very clearly:

message.To.Add("one@example.com, two@example.com"));

The e-mail addresses to add to the MailAddressCollection. Multiple e-mail addresses must be separated with a comma character (",").

MSDN page

so creating the MailMessage with a comma separated list should work.