Push feature on Winforms
Printed From: IdeaBlade
Category: DevForce
Forum Name: DevForce 2010
Forum Discription: For .NET 4.0
URL: http://www.ideablade.com/forum/forum_posts.asp?TID=2924
Printed Date: 13-May-2026 at 6:38pm
Topic: Push feature on Winforms
Posted By: wackywhizz
Subject: Push feature on Winforms
Date Posted: 25-Aug-2011 at 3:14am
| I've seen samples and codes about the PUSH feature but they're just on WPF and SL. Is it just because there are just no samples available for Winforms or is it that this PUSH feature is not available on Winforms? |
Replies:
Posted By: sbelini
Date Posted: 25-Aug-2011 at 9:42am
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Hi wackywhizz, Although there isn't an specific Winforms sample using Push notification, the concept is the same and you should be able to implement it in a Winforms app. Silvio.
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Posted By: wackywhizz
Date Posted: 25-Aug-2011 at 4:57pm
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Hi Silvio, Can you point me to the right direction as to how do I start trying this feature out..? I have copies of both sample codes for Silverlight and WPF but I was thinking of creating a win app from scratch? Would you recommend me to use some of the existing projects from the sample code I downloaded? Thanks, Lawrence
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Posted By: sbelini
Date Posted: 25-Aug-2011 at 5:21pm
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Hi Lawrence, You could use the DomainModel project if you are simply trying to create a sample using NorthwindIB. If you take a closer look, the push notification feature is very much alike in both SL and WPF samples. Basically, all you need is: 1- Define a push service; (i.e. use [AllowRpc] and method signature conforming to ServerNotifyDelegate) 2- Subscribe to it; (RegisterCallback method) 3- Configure it. (in the server and client config files) You will find detailed information about the Push notification in the http://drc.ideablade.com/xwiki/bin/view/Documentation/push-notification - DevForce Resource Center . Silvio.
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Posted By: wackywhizz
Date Posted: 07-Sep-2011 at 3:24am
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Hi Silvio,
I read the documents and also downloaded the SL sample code for the push service. I then tried to create a winform counterpart and I'm having a "Exception has been thrown by the target of an invocation" error. Can you help me with this..? Here is my project file: http://dl.dropbox.com/u/40770720/WinFormsPush.rar - http://dl.dropbox.com/u/40770720/WinFormsPush.rar Here is a screenshot of my error: http://dl.dropbox.com/u/40770720/exception.png - http://dl.dropbox.com/u/40770720/exception.png Thanks, Lawrence |
Posted By: sbelini
Date Posted: 08-Sep-2011 at 5:26pm
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Hi Lawrence, I'm taking a look at your project and will follow up shortly. Silvio.
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Posted By: sbelini
Date Posted: 08-Sep-2011 at 6:59pm
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Lawrence, The issue is that the method signature does not conform to the ServerNotifyDelegate. You have: [AllowRpc] public static void NewMessage(Guid key, INotificationManager mMgr, DAL.DFModel eMgr) but you should have instead: [AllowRpc] public static void NewMessage(Guid key, INotificationManager mMgr, EntityManager eMgr) You can later create a sub-typed entity manager: entityMgr = new DFModel(eMgr); Also, be sure to enable the notificationService in the server (i.e. web.config file): <notificationService enabled="true" /> Regards, Silvio.
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Posted By: wackywhizz
Date Posted: 08-Sep-2011 at 7:39pm
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Hi Silvio,
I already have the notification service enabled and I did what you said about using the correct signature of the ServerNotifyDelegate, but I still experience the exception has been thrown error.. Is there maybe any additional assemblies that I need to add into my project? Thanks, Lawrence |
Posted By: sbelini
Date Posted: 09-Sep-2011 at 8:58am
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Hi Lawrence, I haven't added any additional assemblies. I'm sending your sample back with the changes I made, so you can take a closer look. (note that I changed the connection string to match my datasource) You can download it at uploads/892/WinFormsPush.zip - uploads/892/WinFormsPush.zip Regards, Silvio.
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Posted By: wackywhizz
Date Posted: 14-Nov-2011 at 2:12am
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Hi Silvio, I'm still receiving the errors. I've attached a new one I created trying to fix it by creating an all new project. Still I seem to get the same error. I've attached the project together with a screenshot of the exception I've been experiencing.  uploads/1247/PushServerClient.rar - uploads/1247/PushServerClient.rar Thanks, Lawrence
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Posted By: sbelini
Date Posted: 14-Nov-2011 at 8:57am
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Thanks Lawrence, I'm taking a look at you sample and will follow up shortly. Silvio.
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Posted By: kimj
Date Posted: 14-Nov-2011 at 3:22pm
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Hi Lawrence, To use Push in DevForce you do have to tell the server that you want it, so that it sets up the appropriate endpoint(s) to listen on. You can do this by adding one simple setting within the ideablade.configuration section of the web.config: <notificationService enabled="true" /> This is sufficient to allow DevForce to set up the Push service with all defaults in place. On the client side in a WinClient application you also have to provide the client-side port which will be "listening" for messages from the server. You do this in your app.config as follows (port 9012 is just used as an example): <notificationService clientPort="9012" /> The http://drc.ideablade.com/xwiki/bin/view/Documentation/code-sample-push-notification - WPF sample shows this configuration and you can find out more http://drc.ideablade.com/xwiki/bin/view/Documentation/push-notification#HConfigurethepushservice - here .
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