SmtpClient::SendCompleted Event
.NET Framework (current version)
Occurs when an asynchronous e-mail send operation completes.
Assembly: System (in System.dll)
The SendCompleted event is raised each time an e-mail message is sent asynchronously when the send operation completes. To send an e-mail message asynchronously, use the SendAsync methods.
SendCompletedEventHandler is the delegate for SendCompleted. The AsyncCompletedEventArgs class provides the event handler with event data.
The following code example demonstrates sending an e-mail message asynchronously.
#using <System.dll> using namespace System; using namespace System::Net; using namespace System::Net::Mail; using namespace System::Net::Mime; using namespace System::Threading; using namespace System::ComponentModel; static bool mailSent; static void SendCompletedCallback(Object^ sender, AsyncCompletedEventArgs^ e) { // Get the unique identifier for this asynchronous // operation. String^ token = (String^) e->UserState; if (e->Cancelled) { Console::WriteLine("[{0}] Send canceled.", token); } if (e->Error != nullptr) { Console::WriteLine("[{0}] {1}", token, e->Error->ToString()); } else { Console::WriteLine("Message sent."); } mailSent = true; } int main(array<String^>^ args) { if (args->Length > 1) { // Command line argument must the the SMTP host. SmtpClient^ client = gcnew SmtpClient(args[1]); // Specify the e-mail sender. // Create a mailing address that includes a UTF8 // character in the display name. MailAddress^ from = gcnew MailAddress("jane@contoso.com", "Jane " + (wchar_t)0xD8 + " Clayton", System::Text::Encoding::UTF8); // Set destinations for the e-mail message. MailAddress^ to = gcnew MailAddress("ben@contoso.com"); // Specify the message content. MailMessage^ message = gcnew MailMessage(from, to); message->Body = "This is a test e-mail message sent" + " by an application. "; // Include some non-ASCII characters in body and // subject. String^ someArrows = gcnew String(gcnew array<wchar_t>{L'\u2190', L'\u2191', L'\u2192', L'\u2193'}); message->Body += Environment::NewLine + someArrows; message->BodyEncoding = System::Text::Encoding::UTF8; message->Subject = "test message 1" + someArrows; message->SubjectEncoding = System::Text::Encoding::UTF8; // Set the method that is called back when the send // operation ends. client->SendCompleted += gcnew SendCompletedEventHandler(SendCompletedCallback); // The userState can be any object that allows your // callback method to identify this send operation. // For this example, the userToken is a string constant. String^ userState = "test message1"; client->SendAsync(message, userState); Console::WriteLine("Sending message... press c to" + " cancel mail. Press any other key to exit."); String^ answer = Console::ReadLine(); // If the user canceled the send, and mail hasn't been // sent yet,then cancel the pending operation. if (answer->ToLower()->StartsWith("c") && mailSent == false) { client->SendAsyncCancel(); } // Clean up. delete message; client = nullptr; Console::WriteLine("Goodbye."); } else { Console::WriteLine("Please give SMTP server name!"); } }
.NET Framework
Available since 2.0
Available since 2.0
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