cc和bcc发送错误的电子邮件 [英] email sending error with cc and bcc

问题描述

这里是我的代码。当我在from，to，cc和bcc字段中输入电子邮件地址时，我的网络应用程序会发送电子邮件。但是当我只输入电子邮件地址时，要将cc和bcc字段设为空它给我错误



异常详细信息：System.ArgumentException：参数'address'不能是空字符串。

参数名称：地址



来源错误：

Here my code.when i enter email address in from,to,cc and bcc field my web app send the email.but when i only enter email address in from,to and make cc and bcc field empty it give me error

Exception Details: System.ArgumentException: The parameter 'address' cannot be an empty string.
Parameter name: address

Source Error:

Line 89:             foreach (string emailCC in txtCc.Text.ToString().Split(splitter))
Line 90:             {
Line 91:                 mail.CC.Add(new MailAddress(emailCC));
Line 92:             }
Line 93: 

这里我的代码请帮我一个谷歌很多但我找不到

here my code please help me a google alot but i can not find the

private void SendEmail()
    {
        MailMessage mail = new MailMessage();

        if (txtTo.Text != null)
        {
            char[] splitterrr = { ';' };
            foreach (string emailTo in txtTo.Text.ToString().Split(splitterrr))
            {
                mail.To.Add(new MailAddress(emailTo));
            }
        }
        //mail.To.Add(EmailAddress);
        mail.From = new MailAddress(txtFrom.Text.ToString());
        mail.Subject = txtSubject.Text;
        mail.Body = edtrMessage.Content.ToString();
        if (txtCc.Text != null)
        {

            char[] splitter = { ';' };
            foreach (string emailCC in txtCc.Text.ToString().Split(splitter))
            {
                mail.CC.Add(new MailAddress(emailCC));
            }

        }
        else if (null == txtCc.Text || txtCc.Text.Length == 0 || txtCc.Text == String.Empty)
        {
            mail.CC.Add(new MailAddress(txtCc.Text.ToString()));
        }
        if (txtBcc.Text != null)
        {

            char[] splitterr = { ';' };
            foreach (string emailBB in txtBcc.Text.ToString().Split(splitterr))
            {
                mail.Bcc.Add(new MailAddress(emailBB));
            }
        }
        else if (null == txtBcc.Text || txtBcc.Text.Length == 0 || txtBcc.Text == String.Empty)
        {
            mail.Bcc.Add(new MailAddress(txtBcc.Text.ToString()));
        }
        HttpFileCollection files = Request.Files;
        for (int i = 0; i < files.Count; i++)
        {
            HttpPostedFile file = files[i];
            mail.Attachments.Add(new Attachment(file.InputStream, Path.GetFileName(file.FileName), file.ContentType));

        }

        mail.IsBodyHtml = true;
        SmtpClient smtp = new SmtpClient();
        smtp.Port = 587;
        smtp.Host = "smtp.gmail.com";
        smtp.Credentials = new System.Net.NetworkCredential(txtFrom.Text.ToString(), txtPass.Text.ToString());
        smtp.EnableSsl = true;
        smtp.Send(mail);
        
    }

推荐答案

扩展Amits解决方案：

Expanding on Amits solution:

foreach (string emailCC in txtCc.Text.ToString().Split(splitter))
{
    if(!string.IsNullOrWhitespace(emailCC)){
        mail.CC.Add(new MailAddress(emailCC.Trim()));
    }
}

或者，您可以通过使用.Split重载之一来提前捕获它： br $> b $ b

or, you can catch it earlier by using one of the .Split overloads:

foreach (string emailCC in txtCc.Text.ToString().Split(splitter.ToCharArray(), StringSplitOptions.RemoveEmptyEntries))

添加地址之前检查它是否存在。试试这个：

Before adding address Check for its existance. Try this:

foreach (string emailCC in txtCc.Text.ToString().Split(splitter))
{
    if(emailCC.Trim() != ""){
        mail.CC.Add(new MailAddress(emailCC.Trim()));
    }
}

- Amit

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