基于包含电子邮件地址的 gridview 列发送电子邮件

Question

我可以知道如何根据包含电子邮件地址的 gridview 列发送电子邮件吗？ 我目前正在使用 asp.net 和 c#。我目前也在使用 smtp gmail 发送电子邮件。

目前，我有一个 gridview1，其中包含退回支票的客户（电子邮件、姓名、帐户号），但是我希望在单击按钮后向所有这些客户发送标准电子邮件。我可以知道我该怎么做吗？他们的电子邮件存储在数据库中，并将显示在 gridview 上。

   private void SendEMail(MailMessage mail)
{
    SmtpClient client = new SmtpClient();
    client.Host = "smtp.gmail.com";
    client.Port = 587;
    client.EnableSsl = true;
    client.Credentials = new System.Net.NetworkCredential("@gmail.com", "password");

    try
    {
        client.Send(mail);
    }
    catch (Exception ex)
    {
        Console.WriteLine("{0} Exception caught.", ex);
    }

Answer 1

最简单的方法是遍历绑定到网格视图的数据集。但是，既然您已经询问了 gridview，那么您可以通过以下方式循环遍历 gridview 行

在 button_click 上写这个

string email = "";
foreach (GridViewRow item in GridView1.Rows)
{
      //considering 1st column contains email address
      //if not, replace it with correct index
      email =  item.Cells[0].Text;
      //code to send email

}

更新 2

更新我的代码以使用您的 sendEmail 功能

public void button_click(object sender, EventArgs e)
{
    string email = "";
    foreach (GridViewRow item in GridView1.Rows)
    {

          //if not, replace it with correct index
          email =  item.Cells[4].Text;
          //code to send email
         //reciever email add
         MailAddress to = new MailAddress(email);
         //sender email address
         MailAddress from = new MailAddress("your@email");

        MailMessage msg = new MailMessage();
        //use reason shown in grid
        msg.Subject = item.Cells[3].Text;

        //you can similar extract FName, LName, Account number from grid
        // and use it in your message body
        //Keep your message body like 
        str email_msg = "Dear {0} {1}, Your cheque for account number {2} bounced because of    the reason {3}";
        msg = String.Format(email_msg , item.Cells[0].Text,item.Cells[1].Text,item.Cells[2].Text,item.Cells[3].Text);
        msg.Body = email_msg ;
        msg.From = from;
        msg.To.Add(to);

        SendEMail(msg);

    }
}

Answer 2

尝试将电子邮件地址保存在一个数组中。

然后执行一次 foreach 并发送数组中的电子邮件！

示例：

类：

    public SmtpClient client = new SmtpClient();
    public MailMessage msg = new MailMessage();
    public System.Net.NetworkCredential smtpCreds = new System.Net.NetworkCredential("mail", "password");

public void Send(string sendTo, string sendFrom, string subject, string body)
{
    try
    {
        //setup SMTP Host Here
        client.Host = "smtp.gmail.com";
        client.Port = 587;
        client.UseDefaultCredentials = false;
        client.Credentials = smtpCreds;
        client.EnableSsl = true;

        //convert string to MailAdress

        MailAddress to = new MailAddress(sendTo);
        MailAddress from = new MailAddress(sendFrom);

        //set up message settings

        msg.Subject = subject;
        msg.Body = body;
        msg.From = from;
        msg.To.Add(to);

        // Send E-mail

        client.Send(msg);

    }
    catch (Exception error)
    {
    }
}

发送电子邮件：（button_click）

//read the emails from the database and save them in an array.
//count how many are the emails, ex: int countEmails = SqlClass.Function("select emails from table").Rows.Count;

string[] emails = new string[countEmails];
foreach (string item in emails)
{
   //send e-mail
   callClass.Send(item, emailFrom, subject, body); //you can adapt the class
}