Send an email automatically when internet connected .

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.NET3.5

Good Evening,
I am doing Reservation Form in Windows applications using C#.net.
I send an email at reservation button click event.
My problem is at the time of reservation there is no net. after one hour internet is coming. how can i put this in waiting. is there any way to do this.

Posted 9-Jun-11 2:15am

ajitha.pusapati

Updated 9-Jun-11 2:16am

v2

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kiran pericherla 23-Apr-13 8:03am

Hi,
can you tell me how to send email using Windows applications using C#.net.
If you don't mind can you post the code

2 solutions

Solution 2

Wayne is right.

However, you also need to trigger the action when Internet got connected. Unfortunately, nothing will give you notification. I suggest you create a Windows Service which detect accessibility of your e-mail server (SMPT server or whatever you use). You can do it by pinging its IP.

For this reason, you need to have a separate thread in your Service with periodically pings your server. The period will be determined by some delay in System.Threading.Thread.Sleep. For pinging, use the class System.Net.NetworkInformation.Ping. Also, you thread should stay in wait state when Internet is available. For this purpose, use the class System.Threading.EventWaitHandle. Share an instance of this class between thread. Your pinging thread should call EventWaitHandle.WaitOne in each cycle. When you detect that Internet was suddenly disconnected (by any exception in communication) in any other thread, you should call EventWaitHandle.Set on the same instance. It will wake-up the waiting pinging thread and let it start pinging.

—SA

Posted 10-Jun-11 6:41am

Sergey Alexandrovich Kryukov

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Wayne Gaylard · Accepted Answer · 2011-06-09T02:29:00

Solution 1

You should just save the email to disk if there is currently no connection. Maybe you should then institute a Windows Service that polls the email folder, and then checks if there is an internet connection whenever there is any undelivered mail.

Hope this helps

Posted 9-Jun-11 2:29am

Wayne Gaylard

Comments

Abhinav S 9-Jun-11 8:34am

Good approach. My 5!

Wayne Gaylard 9-Jun-11 8:40am

Thanks!

ajitha.pusapati 9-Jun-11 8:36am

can u explain clearly.

Wayne Gaylard 9-Jun-11 8:48am

I think the answer was pretty clear. Just pick a specific folder on the server that can be used for storing undelivered emails. When the application wants to send an email, it can check for an internet connection. If there is a connection, the app can simply send the email. If there is no connection then the application can serialize the email into text or such like and save the file to your specified folder. You can then create a Windows Service which runs on the server and keeps a watch on your specified folder. The service can use FileSystemWatcher Class to keep informed of when a file is created or updated in your folder. If there is any undelivered mail, then the service can keep on checking for an internet connection. Once it has a connection, then it can send all unsent emails. Hope this is clear.

Abdullatif M. Abu Al Rub 9-Jun-11 9:03am

thats good i'll vote a 5 for that answer but do you have any sample code for doing such a thing??

Wayne Gaylard 9-Jun-11 9:06am

This would consist of more than a little code. This is a whole project. You are a developer. You have the specs, now get researching and coding.

Kim Togo 9-Jun-11 9:15am

Good approach. My 5.

Wayne Gaylard 9-Jun-11 9:24am

Thanks Kim!

thatraja 10-Jun-11 1:47am

Nice answer. 5!

BTW Wayne we are playing FL for now(IND-WI). Will call you @ IND-ENG series.

Wayne Gaylard 10-Jun-11 2:41am

Thanks ThatRaja. Please let me know when the FL for India - England starts. I would appreciate it.

Sergey Alexandrovich Kryukov 10-Jun-11 12:43pm

All correct, a 5. However, how to trigger it when connection becomes possible?

I answer this in my solution, please see.
--SA