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POTimer usage in Thread Pool
 

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    <p>I am developing a windows application for my company that runs on the server. It is a multi threaded application, and i am using Thread Pool for that.</p> <p>My Application Email module consists of 3 major methods. 1st method gets new campaigns from database, second method decides to whom the campaign is going to be sent via email and third method sends it.</p> <p>When I start the application, 1st method goes into Thread Pool, if there is a new campaign, 2nd method is invoked with the campaign info. But while these all are happening, first method has to check database in every three seconds if there is a new campaign or not.</p> <p>I am not sure if I have to use System.Windows.Forms.Timer class for that or System.Threading.Timer??</p> <p>And I am not sure how to implement it? Am I going to use Invoke Function to invoke thread outside the main UI? Could you please post an example code and suggest best practices?? Thanks a lot</p> <p>Here is my code :</p> <pre><code>private void btnStart_MouseClick(object sender, MouseEventArgs e) { smartThreadPool = new SmartThreadPool(); workItemGroup = smartThreadPool.CreateWorkItemsGroup(1); workItemGroup.QueueWorkItem(CheckNewCampaigns); //smartThreadPool.QueueWorkItem(new WorkItemCallback(this.CheckNewCampaigns)); } private object CheckNewCampaigns(object state) // 1st method { StringBuilder builder = new StringBuilder(); IEnumerable&lt;Campaigns&gt; CampaignsList = DatabaseManager.GetCampaignsList(DatabaseManager.GetNewCampaigns()); foreach (Campaigns Campaign in CampaignsList) { builder.AppendFormat("New Campaign Arrived($) --&gt; {0}\r\n", DateTime.Now.ToLongTimeString()); builder.AppendFormat("CampaignID --&gt; {0}\r\n", Campaign.CampaignID); builder.AppendFormat("CustomerID --&gt; {0}\r\n", Campaign.CustomerID); builder.AppendFormat("ClientID --&gt; {0}\r\n", Campaign.ClientID); builder.AppendFormat("Title --&gt; {0}\r\n", Campaign.Title); builder.AppendFormat("Subject --&gt; {0}\r\n", Campaign.Subject); builder.AppendFormat("Status --&gt; {0}\r\n", Campaign.Status); } Console.WriteLine(builder.ToString()); workItemGroup.QueueWorkItem(new WorkItemCallback(this.PrepareCampaignEmail), 2); return true; } private object PrepareCampaignEmail(object CampaignID) // Second Method { int campaignID = (int)CampaignID; IEnumerable&lt;Campaigns&gt; CampaignDetailsList = DatabaseManager.GetCampaignsList(DatabaseManager.GetCampaignDetails(campaignID)); // bir tane campaign gelmekte IEnumerable&lt;Subscribers&gt; SubscribersList = DatabaseManager.GetCampaignSubscribersList(DatabaseManager.GetCampaignSubscribers(campaignID)); ArrayList test = new ArrayList(); DataTable dtCustomValuesForCampaign = DatabaseManager.GetCustomValuesForCampaign(campaignID); foreach (Subscribers subscriber in SubscribersList) { workItemGroup.QueueWorkItem(new WorkItemCallback(this.SendEmail), subscriber.Email); } return true; } </code></pre>
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    1. USYagiz Ozturk
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    1. COAnd there's also [System.Timers.Timer](http://msdn.microsoft.com/en-us/library/system.timers.timer.aspx)! (And [System.Windows.Threading.DispatchTimer](http://msdn.microsoft.com/en-us/library/system.windows.threading.dispatchertimer.aspx) in WPF) Check out this [question](http://stackoverflow.com/questions/2313677/timers-in-a-net-application) and its answer to clear out any confusions about all those timers.
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      1. USR. Martinho Fernandes
    2. COHave you tried system.Threading.timer http://msdn.microsoft.com/en-us/library/system.threading.timer.aspx
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      1. USDavid
 

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