Imports System.Net.Mail
Imports System.Net.Mime
Imports System.ComponentModel
Sub Send_Email_Asynchronously()
Try
Dim oMailMsg As MailMessage
Dim oClient As SmtpClient
oMailMsg = New MailMessage
oMailMsg.From = New MailAddress("admin@vbadud.com")
oMailMsg.To.Add(New MailAddress("sample@yahoo.co.au"))
oClient = New SmtpClient("smtp.vbadud.com") ' configure client
AddHandler oClient.SendCompleted, AddressOf Client_SendCompleted
' Send message
oClient.EnableSsl = True
' Send Message Asynchronously
oClient.SendAsync(oMailMsg, Nothing)
Catch ex2 As SmtpFailedRecipientException
'Represents the exception that is thrown when the SmtpClient is not able to complete a Send or SendAsync operation to a particular recipient.
' Occurs when the message is delivered within the given domain
MessageBox.Show(ex2.Message)
Catch ex3 As SmtpException
' Occurs when the message is delivered within any domain
MessageBox.Show(ex3.Message)
End Try
End Sub
oClient.SendAsync sends the specified e-mail message to an SMTP server for delivery. This method does not block the calling thread and allows the caller to pass an object to the method that is invoked when the operation completes.
The following event will be raised when an asynchronous e-mail send operation completes. You can cancel the message in between too.
Private Sub Client_SendCompleted(ByVal sender As Object, ByVal e As asynccompletedeventargs)
If e.Cancelled Then '
MessageBox.Show("Message sending cancelled")
Else
If e.Error Is Nothing Then
MsgBox("Message Sent Successfully")
Else
MsgBox("error has occurred :" & e.Error.Message)
End If
End If
End Sub
Sending Asynchronous mails VB.NET, Sending Secure Mails using VB.NET, Send emails asynchronously using .NET
Posts
If I have 500 messages to send out, is this a good way to do it? Note that I'm talking about 500 messages, not 500 recipients of the same message - 500 different messages to 500 different recipients.
ReplyDeleteI'm concerned that it would create too many calls in the background at once.