发送带有C＃本地工作，但静静地失败过

Question

嗨，我使用下面的代码发送预订形式，但它在本地工作，但是当我把它活了失败，不知道为什么：

保护无效的Page_Load（对象发件人，EventArgs的）{

} 
protected void SendMail() 
{ 
    var sDate = startDate.Text; 
    var eDate = endDate.Text; 

    // Gmail Address from where you send the mail 
    var fromAddress = "xxx@googlemail.com"; 
    // any address where the email will be sending 
    var toAddress = "silverhillcattery@hotmail.co.uk"; 
    //Password of your gmail address 
    const string fromPassword = "xxx"; 
    // Passing the values and make a email formate to display 
    string subject = YourSubject.Text.ToString(); 
    string body = "From: " + YourName.Text + "\n"; 
    body += "Email: " + YourEmail.Text + "\n"; 
    body += "Contact Number: " + txtContactNumber.Text + "\n"; 
    body += "Subject: " + YourSubject.Text + "\n"; 
    body += "Question: \n" + Comments.Text + "\n"; 
    body += "Pet Name(s): \n" + txtPetName.Text + "\n"; 
    body += "Start Date: \n" + sDate + "\n"; 
    body += "End Date: \n" + eDate + "\n"; 

    // smtp settings 
    var smtp = new System.Net.Mail.SmtpClient(); 
    { 
     smtp.Host = "smtp.gmail.com"; 
     smtp.Port = 587; 
     smtp.EnableSsl = true; 
     smtp.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network; 
     smtp.Credentials = new NetworkCredential(fromAddress, fromPassword); 
     smtp.Timeout = 20000; 
    } 
    // Passing values to smtp object 
    smtp.Send(fromAddress, toAddress, subject, body); 
} 

protected void Button1_Click(object sender, EventArgs e) 
{ 
    try 
    { 
     //here on button click what will done 
     SendMail(); 
     DisplayMessage.Text = "Thank you for contacting us we will get back to you shortly. If you would like to talk to us, please call 0208 236 9572"; 
     DisplayMessage.Visible = true; 
     YourSubject.Text = ""; 
     YourEmail.Text = ""; 
     YourName.Text = ""; 
     Comments.Text = ""; 
    } 
    catch (Exception) { } 
} 

它不发送消息或显示“感谢您联系......”

这是网站www.silverhillcattery.co .uk

任何帮助将不胜感激！

更新：

我加入了错误信息的建议，我现在得到以下错误：

“SMTP服务器要求安全连接或客户端未通过身份验证”

我将研究这个问题。

Answer 1

我只能猜测您的凭据在您的本地环境中工作，但不在您的实时环境中。如果你的代码在发送时发生异常，它将绕过显示代码并直接进入你的“catch”代码。

为了调试它，我会在显示屏之后放置发送以查看会发生什么，或者更合适地修改catch（exception）以获取错误并显示该错误。

catch (Exception ex) 
{ 
      DisplayMessage.Text = "Failed to send email. Error = " + ex.message; 
     DisplayMessage.Visible = true; 
}