SmtpException 類別

定義

表示在 SmtpClient 無法完成 SendSendAsync 作業時擲回的例外狀況。Represents the exception that is thrown when the SmtpClient is not able to complete a Send or SendAsync operation.

public ref class SmtpException : Exception
[System.Serializable]
public class SmtpException : Exception
type SmtpException = class
    inherit Exception
    interface ISerializable
Public Class SmtpException
Inherits Exception
繼承
SmtpException
衍生
屬性
實作

範例

下列程式碼範例會在擲回SmtpException例外狀況時顯示錯誤訊息。The following code example displays an error message when the SmtpException exception is thrown.

static void RetryIfBusy( String^ server )
{
   MailAddress^ from = gcnew MailAddress( L"ben@contoso.com" );
   MailAddress^ to = gcnew MailAddress( L"jane@contoso.com" );
   MailMessage^ message = gcnew MailMessage( from,to );
   
   // message.Subject = "Using the SmtpClient class.";
   message->Subject = L"Using the SmtpClient class.";
   message->Body = L"Using this feature, you can send an email message from an application very easily.";
   
   // Add a carbon copy recipient.
   MailAddress^ copy = gcnew MailAddress( L"Notifications@contoso.com" );
   message->CC->Add( copy );
   SmtpClient^ client = gcnew SmtpClient( server );
   
   // Include credentials if the server requires them.
   client->Credentials = dynamic_cast<ICredentialsByHost^>(CredentialCache::DefaultNetworkCredentials);
   Console::WriteLine( L"Sending an email message to {0} using the SMTP host {1}.", to->Address, client->Host );
   try
   {
      client->Send( message );
   }
   catch ( SmtpFailedRecipientsException^ ex ) 
   {
      for ( int i = 0; i < ex->InnerExceptions->Length; i++ )
      {
         SmtpStatusCode status = ex->InnerExceptions[ i ]->StatusCode;
         if ( status == SmtpStatusCode::MailboxBusy || status == SmtpStatusCode::MailboxUnavailable )
         {
            Console::WriteLine( L"Delivery failed - retrying in 5 seconds." );
            System::Threading::Thread::Sleep( 5000 );
            client->Send( message );
         }
         else
         {
            Console::WriteLine( L"Failed to deliver message to {0}", ex->InnerExceptions[ i ] );
         }

      }
   }
   catch ( Exception^ ex )
   {
       Console::WriteLine(L"Exception caught in RetryIfBusy(): {0}", 
                     ex->ToString() );
   }
   finally
   {
      client->~SmtpClient();
   }
}


public static void RetryIfBusy(string server)
{
    MailAddress from = new MailAddress("ben@contoso.com");
    MailAddress to = new MailAddress("jane@contoso.com");
    MailMessage message = new MailMessage(from, to);
    // message.Subject = "Using the SmtpClient class.";
    message.Subject = "Using the SmtpClient class.";
    message.Body = @"Using this feature, you can send an email message from an application very easily.";
    // Add a carbon copy recipient.
    MailAddress copy = new MailAddress("Notifications@contoso.com");
    message.CC.Add(copy);
    SmtpClient client = new SmtpClient(server);
    // Include credentials if the server requires them.
    client.Credentials = (ICredentialsByHost)CredentialCache.DefaultNetworkCredentials;
    Console.WriteLine("Sending an email message to {0} using the SMTP host {1}.",
         to.Address, client.Host);
    try
    {
        client.Send(message);
    }
    catch (SmtpFailedRecipientsException ex)
    {
        for (int i = 0; i < ex.InnerExceptions.Length; i++)
        {
            SmtpStatusCode status = ex.InnerExceptions[i].StatusCode;
            if (status == SmtpStatusCode.MailboxBusy ||
                status == SmtpStatusCode.MailboxUnavailable)
            {
                Console.WriteLine("Delivery failed - retrying in 5 seconds.");
                System.Threading.Thread.Sleep(5000);
                client.Send(message);
            }
            else
            {
                Console.WriteLine("Failed to deliver message to {0}", 
                    ex.InnerExceptions[i].FailedRecipient);
            }
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine("Exception caught in RetryIfBusy(): {0}", 
                ex.ToString() );
    }
}

備註

StatusCode屬性包含 SMTP 伺服器所傳回的狀態碼。The StatusCode property contains the status code returned by the SMTP server.

建構函式

SmtpException()

初始化 SmtpException 類別的新執行個體。Initializes a new instance of the SmtpException class.

SmtpException(SerializationInfo, StreamingContext)

初始化 SmtpException 類別的新執行個體,這個執行個體是來自 SerializationInfoStreamingContext 類別的指定執行個體。Initializes a new instance of the SmtpException class from the specified instances of the SerializationInfo and StreamingContext classes.

SmtpException(SmtpStatusCode)

使用指定的狀態碼,初始化 SmtpException 類別的新執行個體。Initializes a new instance of the SmtpException class with the specified status code.

SmtpException(SmtpStatusCode, String)

使用指定的狀態碼和錯誤訊息,初始化 SmtpException 類別的新執行個體。Initializes a new instance of the SmtpException class with the specified status code and error message.

SmtpException(String)

使用指定的錯誤訊息,初始化 SmtpException 類別的新執行個體。Initializes a new instance of the SmtpException class with the specified error message.

SmtpException(String, Exception)

使用指定的錯誤訊息和內部例外狀況,初始化 SmtpException 類別的新執行個體。Initializes a new instance of the SmtpException class with the specified error message and inner exception.

屬性

Data

取得提供例外狀況之其他使用者定義相關資訊的索引鍵/值組集合。Gets a collection of key/value pairs that provide additional user-defined information about the exception.

(繼承來源 Exception)
HelpLink

取得或設定與這個例外狀況相關聯的說明檔連結。Gets or sets a link to the help file associated with this exception.

(繼承來源 Exception)
HResult

取得或設定 HRESULT,它是指派給特定例外狀況的編碼數值。Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception.

(繼承來源 Exception)
InnerException

取得造成目前例外狀況的 Exception 執行個體。Gets the Exception instance that caused the current exception.

(繼承來源 Exception)
Message

取得描述目前例外狀況的訊息。Gets a message that describes the current exception.

(繼承來源 Exception)
Source

取得或設定造成錯誤的應用程式或物件的名稱。Gets or sets the name of the application or the object that causes the error.

(繼承來源 Exception)
StackTrace

取得呼叫堆疊上即時運算框架的字串表示。Gets a string representation of the immediate frames on the call stack.

(繼承來源 Exception)
StatusCode

取得在傳送電子郵件訊息時,SMTP 伺服器所傳回的狀態碼。Gets the status code returned by an SMTP server when an email message is transmitted.

TargetSite

取得擲回目前例外狀況的方法。Gets the method that throws the current exception.

(繼承來源 Exception)

方法

Equals(Object)

判斷指定的物件是否等於目前的物件。Determines whether the specified object is equal to the current object.

(繼承來源 Object)
GetBaseException()

在衍生類別中覆寫時,傳回一或多個後續的例外狀況的根本原因 ExceptionWhen overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions.

(繼承來源 Exception)
GetHashCode()

做為預設雜湊函式。Serves as the default hash function.

(繼承來源 Object)
GetObjectData(SerializationInfo, StreamingContext)

以序列化 SerializationInfo 所需的資料填入 SmtpException 執行個體。Populates a SerializationInfo instance with the data needed to serialize the SmtpException.

GetType()

取得目前執行個體的執行階段類型。Gets the runtime type of the current instance.

(繼承來源 Exception)
MemberwiseClone()

建立目前 Object 的淺層複本 (Shallow Copy)。Creates a shallow copy of the current Object.

(繼承來源 Object)
ToString()

建立並傳回目前例外狀況的字串表示。Creates and returns a string representation of the current exception.

(繼承來源 Exception)

事件

SerializeObjectState

當例外狀況序列化,以建立包含例外狀況相關序列化資料的例外狀況狀態物件時,就會發生此事件。Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception.

(繼承來源 Exception)

明確介面實作

ISerializable.GetObjectData(SerializationInfo, StreamingContext)

以序列化 SerializationInfo 所需的資料填入 SmtpException 執行個體。Populates a SerializationInfo instance with the data needed to serialize the SmtpException.

適用於