我无法发送电子邮件 smtp 错误

Question

我现在正在学习“Pro ASP.NET MVC 4 (Professional Apress)”，当我想编译我的项目时收到以下错误：

SmtpException 未被用户代码处理

“System.Net.Mail.SmtpException”类型的异常发生在 System.dll 但未在用户代码中处理 附加信息：发送邮件失败。

这是源代码：

using System.Net.Mail;
using System.Text;
using SportsStore.Domain.Abstract;
using SportsStore.Domain.Entities;
using System.Net;

namespace SportsStore.Domain.Concrete
{

public class EmailSettings
{
    public string MailToAddress = "abc@wp.pl";
    public string MailFromAddress = "abcd@wp.pl";
    public bool UseSsl = true;
    public string Username = "abcd@wp.pl";
    public string Password = "abcd12";
    public string ServerName = "smtp.wp.pl";
    public int ServerPort = 465;
    public bool WriteAsFile = false;
    public string FileLocation = @"c:\sports_store_emails";
}

public class EmailOrderProcessor : IOrderProcessor
{
    private EmailSettings emailSettings;

    public EmailOrderProcessor(EmailSettings settings)
    {
        emailSettings = settings;
    }

    public void ProcessOrder(Cart cart, ShippingDetails shippingInfo)
    {

        using (var smtpClient = new SmtpClient())
        {

            smtpClient.EnableSsl = emailSettings.UseSsl;
            smtpClient.Host = emailSettings.ServerName;
            smtpClient.Port = emailSettings.ServerPort;
            smtpClient.UseDefaultCredentials = false;
            smtpClient.Credentials
                = new NetworkCredential(emailSettings.Username,
                      emailSettings.Password);

            if (emailSettings.WriteAsFile)
            {
                smtpClient.DeliveryMethod
                    = SmtpDeliveryMethod.SpecifiedPickupDirectory;
                smtpClient.PickupDirectoryLocation = emailSettings.FileLocation;
                smtpClient.EnableSsl = false;
            }

            StringBuilder body = new StringBuilder()
                .AppendLine("Nowe zamówienie")
                .AppendLine("---")
                .AppendLine("Produkty:");

            foreach (var line in cart.Lines)
            {
                var subtotal = line.Product.Price * line.Quantity;
                body.AppendFormat("{0} x {1} (wartość: {2:c}", line.Quantity,
                                  line.Product.Name,
                                  subtotal);
            }

            body.AppendFormat("Wartość całkowita: {0:c}", cart.ComputeTotalValue())
                .AppendLine("---")
                .AppendLine("Wysyłka dla:")
                .AppendLine(shippingInfo.Name)
                .AppendLine(shippingInfo.Line1)
                .AppendLine(shippingInfo.Line2 ?? "")
                .AppendLine(shippingInfo.Line3 ?? "")
                .AppendLine(shippingInfo.City)
                .AppendLine(shippingInfo.State ?? "")
                .AppendLine(shippingInfo.Country)
                .AppendLine(shippingInfo.Zip)
                .AppendLine("---")
                .AppendFormat("Pakowanie prezentu: {0}",
                    shippingInfo.GiftWrap ? "Tak" : "Nie");

            MailMessage mailMessage = new MailMessage(
                                   emailSettings.MailFromAddress,   // od
                                   emailSettings.MailToAddress,     // do
                                   "Otrzymano nowe zamówienie!",          // temat
                                   body.ToString());                // treść

            if (emailSettings.WriteAsFile)
            {
                mailMessage.BodyEncoding = Encoding.ASCII;
            }

            smtpClient.Send(mailMessage);
        }
    }
}
}

任何想法如何解决这个问题？

这是摘录细节：

System.Net.Mail.SmtpException 未被用户代码处理
HResult=-2146233088 Message=发送邮件失败。源=系统
堆栈跟踪： 在 System.Net.Mail.SmtpClient.Send（MailMessage 消息） 在 SportsStore.Domain.Concrete.EmailOrderProcessor.ProcessOrder（购物车 购物车, ShippingDetails shippingInfo) 在 C:\Users\rafal\Desktop\Rozdzial07-11\SportsStore\SportsStore.Domain\Concrete\EmailOrderProcessor.cs:line 93 在 SportsStore.WebUI.Controllers.CartController.Checkout(Cart cart, ShippingDetails shippingDetails) 中 C:\Users\rafal\Desktop\Rozdzial07-11\SportsStore\SportsStore.WebUI\Controllers\CartController.cs:line 39 在 lambda_method（闭包，ControllerBase，对象 []） 在 System.Web.Mvc.ActionMethodDispatcher.Execute（ControllerBase 控制器，Object[] 参数） 在 System.Web.Mvc.ReflectedActionDescriptor.Execute（ControllerContext 控制器上下文，IDictionary2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary2 参数） 在 System.Web.Mvc.Async.AsyncControllerActionInvoker.InvokeSynchronousActionMethod（ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary2 parameters) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass42.<BeginInvokeSynchronousActionMethod>b__41() at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass81.b__7(IAsyncResult _) 在 System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End() 在 System.Web.Mvc.Async.AsyncResultWrapper.End[TResult](IAsyncResult asyncResult，对象标签） 在 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod（IAsyncResult 异步结果） 在 System.Web.Mvc.Async.AsyncControllerActionInvoker.c__DisplayClass37.c__DisplayClass39.b__33() 在 System.Web.Mvc.Async.AsyncControllerActionInvoker.c__DisplayClass4f.b__49() 内部异常： H结果=-2147024893 消息=找不到路径“c:\sports_store_emails\c4734a39-5267-4199-bb29-f28542b3c5ac.eml”的一部分。 源=mscorlib 堆栈跟踪： 在 System.IO.__Error.WinIOError（Int32 错误代码，字符串可能全路径） at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize，FileOptions 选项，SECURITY_ATTRIBUTES secAttrs， String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean 检查主机） 在 System.IO.FileStream..ctor（字符串路径、FileMode 模式、FileAccess 访问、FileShare 共享、Int32 bufferSize、FileOptions 选项，字符串 msgPath，布尔 bFromProxy） 在 System.IO.FileStream..ctor（字符串路径，FileMode 模式） 在 System.Net.Mail.SmtpClient.GetFileMailWriter（字符串pickupDirectory） 在 System.Net.Mail.SmtpClient.Send（MailMessage 消息） 内部异常：

这 2 个警告：

1. 警告

警告 CS0618 'FormsAuthentication.Authenticate(string, string)' 是 过时：'推荐的替代方法是使用会员 API， 例如 Membership.ValidateUser。有关详细信息，请参阅 http://go.microsoft.com/fwlink/?LinkId=252463.' SportsStore.WebUI C:\Users\rafal\Desktop\Rozdzial07-11\SportsStore\SportsStore.WebUI\Infrastructure\Concrete\FormsAuthProvider.cs 10 活动

1. 警告

警告 发现相同版本的不同版本之间存在冲突 无法解析的依赖程序集。这些参考 当日志详细程度设置为时，冲突会在构建日志中列出 详细的。 SportsStore.WebUI

如何解决这个问题？

Answer 1

//Create Mail body
string Emails = MailId;
string file = Server.MapPath("~/Mail.html");
//Generate Mail Body
string mailbody = "Hi"+" " +Emails;
//Whom to send email
 string to = Emails;
//Who is sending mail
string from = "Sender_Mail_Id";
MailMessage msg = new MailMessage(from, to);
msg.Subject = "Auto Response Email";
msg.Body = mailbody;
msg.BodyEncoding = Encoding.UTF8;
msg.IsBodyHtml = true;
SmtpClient client = new SmtpClient("smtp.gmail.com");
client.UseDefaultCredentials = false;
System.Net.NetworkCredential basicCredential = new System.Net.NetworkCredential("User_EMailId", "Password");
client.EnableSsl = true;
client.UseDefaultCredentials = true;
client.Credentials = basicCredential;