Thread: Sending Email Asynchronously

ok, so i am about to implement this
So the current scenario is, i have to first insert a record in database, then send mails to all desired people.

So after the insert, i should get all the emails of the people from database and then call this function to send mail??

Secondly, i dont want to anything if the send mail is failed or successful, so do i need this function SmtpClient_OnCompleted?

Yes you would need this function.

Send the emails using the async function and then it'll just send them in the background without waiting for a response...

The Smtp_OnCompleted function is called by the Async sending function.

ok, will this function Smtp_OnCompleted printout something if process is failed or successful?

Originally Posted by micky

ok, will this function Smtp_OnCompleted printout something if process is failed or successful?

No, I don't believe so....I can't really remember if I'm honest m...

Originally Posted by richyrich

No, I don't believe so....I can't really remember if I'm honest m...

ok RR, i'll see what happens
thanx

Ok, i am facing this error on red line

Code:

 Asynchronous operations are not allowed in this context. Page starting an asynchronous operation has to have the Async attribute set to true and an asynchronous operation can only be started on a page prior to PreRenderComplete event.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Asynchronous operations are not allowed in this context. Page starting an asynchronous operation has to have the Async attribute set to true and an asynchronous operation can only be started on a page prior to PreRenderComplete event.

My code

Code:

    Public Shared Function SendMailUpdate(ByVal emails As String)
        Dim SmtpMail As New System.Net.Mail.SmtpClient(ConfigurationManager.AppSettings("SmtpServer"), 25)
        Dim myMail As New MailMessage()

        'SmtpMail.DeliveryMethod = SmtpDeliveryMethod.Network
        Dim arr_email_to As Array = Split(emails, ";")

        For Each email_to As String In arr_email_to
            myMail.To.Add(New MailAddress(email_to))
        Next

        myMail.From = New MailAddress(ConfigurationManager.AppSettings("NoReply"))
        myMail.Body = ""
        myMail.Subject = "Update"

        Dim mailBox As Object = myMail
        AddHandler SmtpMail.SendCompleted, AddressOf SmtpClient_OnCompleted
        SmtpMail.SendAsync(myMail, mailBox)
    End Function

Function is called from a page like this

Code:

GlobalClasses.SendMailUpdate(strEmailIDs)

Any ideas?

ok added red part in .aspx file of this page in top line and it worked

Code:

<%@ Page Language="VB" Async="true" AutoEventWireup="false"

Do you think these lines in function SendMailUpdate above will send only 1 mail??

Code:

For Each email_to As String In arr_email_to
    myMail.To.Add(New MailAddress(email_to))
Next

Originally Posted by micky

Do you think these lines in function SendMailUpdate above only will send 1 mail??

Code:

For Each email_to As String In arr_email_to
    myMail.To.Add(New MailAddress(email_to))
Next

It should send a seperate email to each address in the array created by splitting the list of email addresses you pass to the function

Originally Posted by richyrich

It should send a seperate email to each address in the array created by splitting the list of email addresses you pass to the function

Ok, its sometimes sending, sometimes not
Is it a slow process RR, i mean i am receiving mails with some delay??

Also its showing all addresses in TO field in mail!!