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  • MVC pattern implementation. What is the n-relation between its components

    - by Srodriguez
    Dear all, I'm working in a C# project and we are , in order to get some unity across the different parts of our UI, trying to use the MVC pattern. The client is windows form based and I'm trying to create a simple MVC pattern implementation. It's been more challenging than expected, but I still have some questions regarding the MVC pattern. The problem comes mostly from the n-n relationships between its components: Here is what I've understood, but I'm not sure at all of it. Maybe someone can correct me? Model: can be shared among different Views. 1-n relationship between Model-View View: shows the state of the model. only one controller (can be shared among different views?). 1-1 relationship with the Model, 1-1 relationship with the controller Controller: handles the user actions on the view and updates the model. One controller can be shared among different views, a controller interacts only with one model? I'm not sure about the two last ones: Can a view have several controller? Or can a view share a controller with another view? Or is it only a 1:1 relationship? Can a controller handle several views? can it interact with several models? Also, I take advantage of this question to ask another MVC related question. I've suppressed all the synchronous calls between the different members of the MVC, making use of the events and delegates. One last call is still synchronous and is actually the most important one: The call between the view and the controller is still synchronous, as I need to know rather the controller has been able to handle the user's action or not. This is very bad as it means that I could block the UI thread (hence the client itself) while the controller is processing or doing some work. How can I avoid this? I can make use of the callback but then how do i know to which event the callback comes from? PS: I can't change the pattern at this stage, so please avoid answers of type "use MVP or MVVC, etc ;) Thanks!

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  • MVC pattern implementation. What is the n-relation between its components

    - by Srodriguez
    Dear all, I'm working in a C# project and we are , in order to get some unity across the different parts of our UI, trying to use the MVC pattern. The client is windows form based and I'm trying to create a simple MVC pattern implementation. It's been more challenging than expected, but I still have some questions regarding the MVC pattern. The problem comes mostly from the n-n relationships between its components: Here is what I've understood, but I'm not sure at all of it. Maybe someone can correct me? Model: can be shared among different Views. 1-n relationship between Model-View View: shows the state of the model. only one controller (can be shared among different views?). 1-1 relationship with the Model, 1-1 relationship with the controller Controller: handles the user actions on the view and updates the model. One controller can be shared among different views, a controller interacts only with one model? I'm not sure about the two last ones: Can a view have several controller? Or can a view share a controller with another view? Or is it only a 1:1 relationship? Can a controller handle several views? can it interact with several models? Also, I take advantage of this question to ask another MVC related question. I've suppressed all the synchronous calls between the different members of the MVC, making use of the events and delegates. One last call is still synchronous and is actually the most important one: The call between the view and the controller is still synchronous, as I need to know rather the controller has been able to handle the user's action or not. This is very bad as it means that I could block the UI thread (hence the client itself) while the controller is processing or doing some work. How can I avoid this? I can make use of the callback but then how do i know to which event the callback comes from? PS: I can't change the pattern at this stage, so please avoid answers of type "use MVP or MVVC, etc ;) Thanks!

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  • Simplest way to flatten document to a view in RavenDB

    - by degorolls
    Given the following classes: public class Lookup { public string Code { get; set; } public string Name { get; set; } } public class DocA { public string Id { get; set; } public string Name { get; set; } public Lookup Currency { get; set; } } public class ViewA // Simply a flattened version of the doc { public string Id { get; set; } public string Name { get; set; } public string CurrencyName { get; set; } // View just gets the name of the currency } I can create an index that allows client to query the view as follows: public class A_View : AbstractIndexCreationTask<DocA, ViewA> { public A_View() { Map = docs => from doc in docs select new ViewA { Id = doc.Id, Name = doc.Name, CurrencyName = doc.Currency.Name }; Reduce = results => from result in results group on new ViewA { Id = result.Id, Name = result.Name, CurrencyName = result.CurrencyName } into g select new ViewA { Id = g.Key.Id, Name = g.Key.Name, CurrencyName = g.Key.CurrencyName }; } } This certainly works and produces the desired result of a view with the data transformed to the structure required at the client application. However, it is unworkably verbose, will be a maintenance nightmare and is probably fairly inefficient with all the redundant object construction. Is there a simpler way of creating an index with the required structure (ViewA) given a collection of documents (DocA)? FURTHER INFORMATION The issue appears to be that in order to have the index hold the data in the transformed structure (ViewA), we have to do a Reduce. It appears that a Reduce must have both a GROUP ON and a SELECT in order to work as expected so the following are not valid: INVALID REDUCE CLAUSE 1: Reduce = results => from result in results group on new ViewA { Id = result.Id, Name = result.Name, CurrencyName = result.CurrencyName } into g select g.Key; This produces: System.InvalidOperationException: Variable initializer select must have a lambda expression with an object create expression Clearly we need to have the 'select new'. INVALID REDUCE CLAUSE 2: Reduce = results => from result in results select new ViewA { Id = result.Id, Name = result.Name, CurrencyName = result.CurrencyName }; This prduces: System.InvalidCastException: Unable to cast object of type 'ICSharpCode.NRefactory.Ast.IdentifierExpression' to type 'ICSharpCode.NRefactory.Ast.InvocationExpression'. Clearly, we also need to have the 'group on new'. Thanks for any assistance you can provide. (Note: removing the type (ViewA) from the constructor calls has no effect on the above)

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  • Detecting I/O errors in a NON BLOCKING SOCKET

    - by ripunjay-tripathi-gmail-com
    I am writing a client - server system in which I used NON-BLOCKING sockets. My problem is to detect error { while performing send() or write() } that may occur while data transfer. Example lets say, while the data is being transferred the peer crashes. Another case there is some network problem, something like wire unplugged etc. As of now, I am using a high level ACK, that peer sends after receiving the complete data. Ripunjay Tripathi

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  • Installation doesn't recognize SQL server 2008 saying Server components not found

    - by Aarthi
    Please answer these 2 questions: Our installation is not recognising the SQL server 2008 and if we try to create a DB, its telling Server components not found. Please tell what may be the issue and why it's not recognising. But our installation proceeds as client installation(if i point to the same instance with DB already created) without any issues. Can we install SQL express 2005 in a machine where SQL server 2008 is already installed. Please clarify.

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  • java asynchronous task.

    - by Tony
    For some of HTTP requests from clients, there was very complex business logic in server side. Some of these business logics doesn't require to response to the client immediately, like sending a email to somebody. Can I put those tasks in an asynchronous method.

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  • Is there a way to detect when a WSS default.aspx page is updated?

    - by Alan
    That is detect when the user makes web part changes and selects to exit editing the page. I want to be able to capture a page event, then create a SharePoint task to instruct a user to translate that page to another language (note that MOSS and variations is not an option because the client wants to use the free version of SharePoint). So the customer wants essentially the same WSS site in multiple languages.

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  • Setting Java 1.6 as the default on Mac OS X 10.5.8

    - by Eyvind
    How can I set Java 1.6 to be the default for my MacBook Pro Intel Core 2 Duo with OS X 10.5.8? I have installed the latest software update, and dragged the Java SE 6 64-bit choice to the top in the "Java Preferences" application (and even rebooted), but still, on the command line, java -version responds with: java version "1.5.0_24" Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_24-b02-357-9M3165) Java HotSpot(TM) Client VM (build 1.5.0_24-149, mixed mode, sharing) Any ideas?

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  • ActiveMQ - sending message to specific consumer

    - by archer
    Hello. Having single AMQ broker and 100 consumers connected. I would send the message to some specific consumer, so other consumers does not receive it (client-side filtering won't work). Simplest way is to create virtual destinations (name them queue:consumer-) for example and send messages there. However this will lead to 100 new queues which makes it more complex to monitor. Is there any other way to do this having single queue?

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  • Which CMS plugins for Wordpress should I use?

    - by abeger
    I'm looking into setting up a very simple site (static pages and an image gallery) with Wordpress for a non-web-savvy client, so I'd like to simplify the Editor role's admin interface as much as possible. Looking through Wordpress's plugin directory, I found several plugins that "CMS-ify" the admin side of things, hiding menu options and the like. Are there any "admin-cleaning" plugins you'd recommend? Are there any other plugins I should look into?

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  • some userful 3rd party API's for j2me

    - by Vivart
    Fixed Point Integer Math MathFP kSOAP is a SOAP web service client library for constrained Java environments such as Applets or J2ME applications (CLDC / CDC / MIDP). http://sourceforge.net/projects/ksoap2/ kXML is a lean Common XML API with namespace and WAP support that is intended to fit into the JAVA KVM for limited devices like the Palm Pilot. http://sourceforge.net/projects/kxml/ UI library https://lwuit.dev.java.net/ http://www.j2mepolish.org/cms/

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  • How does Microsoft generate the Event ID for winqual events?

    - by Tim
    I am curious about the IDs that are used to identify items in winqual. I assume it is some sort of hash. Is this published? Hash of the module name, its version and an offset? That seems appropriate but the size is too small to cover the possibilities unless some truncation/lossy algorithm is used. This seems to be generated with the minidump on the client machine.

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  • How to send IM message like Skype in Android ?

    - by mob-king
    I have to build a feature in my application which allows user to send a skype message. For this I have installed skype lite client for Android (although offically the download has been currently withdrawn from Skype). Now how to initiate the activity from my application OR simply send the chat message without bringing it front, assuming I have skype installed in Android & also signed in already. Any help ? Thanks.

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  • Naming remote proxy classes

    - by Tobbe
    What are some good names for the client and server side classes that communicate over the network when implementing a remote proxy? The classes are often called stub and skelleton but I don't find those names very "intention revealing". Are there any other (better) alternatives?

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  • How to setup Solr on a live VPS?

    - by user342960
    I follow the instruction on http://lucene.apache.org/solr/tutorial.html and I can setup Solr on my PC. Now when I come to my VPS I cannot overcome the step: $ java -jar start.jar Afer running that command, search service is available at http: //x.x.x.x:8983/solr/select . But, Whenever I close the SSH client, the service on http: //x.x.x.x:8983/solr/select is also closed. So I can't search any more. What should I do? Thanks for any help.

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  • SignOut() without postback in ajax login

    - by Romi
    Hi, I have one asp.net Ajax Login using webservices. In this login i call the loogout() client side from hyperlink: Sys.Services.AuthenticationService.logout(null,onLogoutCompleted,null,null); return false; My Webservice make : [WebMethod] public void Logout() { FormsAuthentication.SignOut(); } logout work but my page make one big postback. Some way to make NO postback at logout? Thanks

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  • media center extended

    - by Gil Montag
    Hi, Where can I find resources related to writing your own media center extender client - i.e. an application that will run on another machine at home and remotely render vista's media center on it, allowing to stream movies, live tv etc Thanks, Gil

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  • Terminology for mobile computing with a tablet?

    - by Idrise_Coulombe
    This is more of a terminology question... I'm developing an occasionally connected application that will run on a tablet for clinicians or field service workers but I'm struggling with what this type of computing is referred to. Mobile computing as connotations of a phone app. Whereas our clients may be occasionally at their desk. Microsoft uses Smart Client a lot, but I'm not sure if that best describes this scenario or is the common term for this kind of computing.

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  • Block the user from changing the System Date/Time

    - by Ananth
    We have a windows application (C# .net) and we'll be giving installers to client. The requirement is that once the application has been installed , user should not be able to edit the system time/date . This is to make sure that the application generated dates/reports are not manipulated. My target OS is Win-XP What is the best way to do that ? Does OS provide any facility to do that ? Thanks in Advance

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  • rendering specific fields with Rails

    - by Tam
    Hi, If I have an object say @user and I want to render only certain fields in it say first_name and last_name(I'm using AMF) render :amf => @user how do I do that? I know I can use :select when doing the 'find' but I need to use the other field at the server side but don't want to send them with AMF to the client side and I don't want to do a second 'find' Thanks, Tam

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  • CompareValidator issue on Firefox

    - by costin
    Hi, I need to validate a date in a web forms application. For this I use a CompareValidator with Operator="DataTypeCheck" Type="Date" The problem is that this Validator doesn't work properly on Firefox with 2 digit years. ( javascript error: m[2] is undefined) With a 4 digits year it's working properly. This problem is described also here: https://connect.microsoft.com/VisualStudio/feedback/details/355573/comparevalidator-client-side-bug-two-digit-year-in-mozilla-based-browsers-throws-js-exception Does anyone know a nice workaround for this? Thanks

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