C# 发送电子邮件的问题

我正在与C#合作，并试图通过网页发送电子邮件。我正在尝试从文本框填充发件人电子邮件地址，收件人电子邮件地址正在硬编码。我的代码如下，我得到的错误是在代码之后

try
    {
        MailMessage oMsg = new MailMessage();
        // TODO: Replace with sender e-mail address. Get from textbox: string SenderEmail = emailbox.text
        oMsg.From = emailbox.Text; //Senders email
        // TODO: Replace with recipient e-mail address.
        oMsg.To = "DummyRecipient@gmail.com"; //Recipient email
        oMsg.Subject = subjecttbox.Text; //Subject of email

        // SEND IN HTML FORMAT (comment this line to send plain text).
        //oMsg.BodyFormat = MailFormat.Html;

        // HTML Body (remove HTML tags for plain text).
        oMsg.Body = EmailBody; //Body of the email

        // ADD AN ATTACHMENT.
        // TODO: Replace with path to attachment.
        //String sFile = @"C:\temp\Hello.txt";  
        //MailAttachment oAttch = new MailAttachment(sFile, MailEncoding.Base64);

        //oMsg.Attachments.Add(oAttch);

        // TODO: Replace with the name of your remote SMTP server.
        SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
        //SmtpMail.SmtpServer = "Smtp.gmail.com"; //Email server name, Gmail = Smtp.gmail.com

        SmtpServer.Port = 587;
        SmtpServer.Credentials = new System.Net.NetworkCredential("DummySenderAddress@gmail.com", "DummyPassword");
        SmtpServer.EnableSsl = true;
        SmtpMail.Send(oMsg);

        oMsg = null;
        //oAttch = null;
    }
    catch //(Exception e)
    {
        Console.WriteLine("{0} Exception caught.", e);
    }

无法将类型“string”隐式转换为 “System.Net.Mail.MailAddress”属性或索引器 无法将“System.Net.Mail.MailMessage.To”分配给--它已被读取 只有

无法将类型“string”隐式转换为 “System.Net.Mail.MailAddressCollection”名称“SmtpMail”不存在 存在于当前上下文中

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问题出在你这一行：

oMsg.To = "DummyRecipient@gmail.com"; //Recipient email

电子邮件可以有多个收件人。因此，MailMessage类的“To”属性是一个集合。没有一个电子邮件地址

此外，您需要创建一个MailAddress对象，而不仅仅是为电子邮件使用字符串

使用以下行而不是上面的行

oMsg.To.Add(new MailAddress("DummyRecipient@gmail.com")); //Recipient email

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oMsg.From将MailAddress对象作为其输入，而不是字符串。替换为：

oMsg.From = new MailAddress(emailbox.Text);

oMsg.To.Add("DummyRecipient@gmail.com");

oMsg.To将MailAddressCollection作为其输入。假设集合不为null，您应该能够将其替换为：

oMsg.From = new MailAddress(emailbox.Text);

oMsg.To.Add("DummyRecipient@gmail.com");