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  • M-V-VM, isn't the Model leaking into the View?

    - by BFree
    The point of M-V-VM as we all know is about speraration of concerns. In patterns like MVVM, MVC or MVP, the main purpose is to decouple the View from the Data thereby building more flexible components. I'll demonstrate first a very common scenario found in many WPF apps, and then I'll make my point: Say we have some StockQuote application that streams a bunch of quotes and displays them on screen. Typically, you'd have this: StockQuote.cs : (Model) public class StockQuote { public string Symbol { get; set; } public double Price { get; set; } } StockQuoteViewModel.cs : (ViewModel) public class StockQuoteViewModel { private ObservableCollection<StockQuote> _quotes = new ObservableCollection<StockQuote>(); public ObservableCollection<StockQuote> Quotes { get { return _quotes; } } } StockQuoteView.xaml (View) <Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:WpfApplication1" Title="Window1" Height="300" Width="300"> <Window.DataContext> <local:StockQuoteViewModel/> </Window.DataContext> <Window.Resources> <DataTemplate x:Key="listBoxDateTemplate"> <StackPanel Orientation="Horizontal"> <TextBlock Text="{Binding Symbol}"/> <TextBlock Text="{Binding Price}"/> </StackPanel> </DataTemplate> </Window.Resources> <Grid> <ListBox ItemTemplate="{StaticResource listBoxDateTemplate}" ItemsSource="{Binding Quotes}"/> </Grid> </Window> And then you'd have some kind of service that would feed the ObservableCollection with new StockQuotes. My question is this: In this type of scenario, the StockQuote is considered the Model, and we're exposing that to the View through the ViewModel's ObservableCollection. Which basically means, our View has knowledge of the Model. Doesn't that violate the whole paradigm of M-V-VM? Or am I missing something here....?

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  • How to take URL and split/string to get URL variables in Flash AS3

    - by Leon
    So I have a URL that I need my Flash movie to extract variables from: example link: http://www.example.com/example_xml.php?aID=1234&bID=5678 I need to get the aID and the bID numbers. I'm able to get the full URL into a String via ExternalInterface var url:String = ExternalInterface.call("window.location.href.toString"); if (url) testField.text = url; Just unsure as how to manipulate the String to just get the 1234 and 5678 numbers. Appreciate any tips, links or help with this!

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  • A .tlb file must be registered?

    - by aF
    Hello, I have a com interop c++ dll that is loaded in c++ throught the .tlb file generated in c#. When I run in my computer it works fine but when I run in a computer that just got formated it gives: WindowsError: exception code 0xe0434f4d Do I have to do something for the .tlb file or its dll to be registered in the system? Something regarding regasm.exe? If so, it is possible to only download regasm.exe and use it? Thanks in advance!

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  • SimpleModal bug when positioning HTML5 video

    - by Damon Morda
    I recently Simple Modal Test <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js" type="text/javascript"></script> <script src="jquery.simplemodal-1.3.5.min.js" type="text/javascript"></script> <script type="text/javascript"> jQuery(function ($) { $('.simple-clicker').click(function (e) { $("#simple-container").modal(); }); }); </script> View preview Header Description of video

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  • Web crawler that can interpret javascript

    - by user320662
    Hi, I want to write a web crawler that can interpret JavaScript. Basically its a program in Java or PHP that takes a URL as input and outputs the DOM tree which is similar to the output in Firebug HTML window. The best example is Kayak.com where you can not see the resulting DOM displayed on the browser when you 'view source' but can save the resulting HTML though firebug.

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  • Error in JSP program -Eclipse 3.5

    - by megala
    while running jsp it shows the following error error reading /opt/eclipse/plugins/com.google.appengine.eclipse.sdkbundle.1.3.0_1.3.0.v200912141120/appengine-java-sdk-1.3.0/lib/shared/jsp/repackaged-appengine-ant-launcher-1.6.5.jar; error in opening zip file How to solve this

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  • Multiple Hotel Booking Engine?

    - by Raf
    Does anyone know of a good solution to make my travel website list all my contractual hotels and list their room nightly rates with flexibility options. I found something quite similar, www.touristway.com was offering it, but I need an open source solution if possible.

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  • Remove file extension from a URL

    - by Thomas Blund
    Hello, I am trying to make my site look more professional by removing the html endings from the pages.. ex. just leaving at http://33tpm.com/es/tienda All the answers Ive found so far are so confusing that I don't really understand anything.. Can someone please help me out? Thank you Thomas

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  • Q&A database map like stackoverflow - seperate table for questions titles

    - by Qiao
    I am planning to make Q&A system (quite specific, has nothing to do with IT) I was looking for Stackoverflow database map: http://meta.stackoverflow.com/questions/2677/anatomy-of-a-data-dump/2678#2678 And I am thinking is not it is better practice to make separate table for questions titles. With "firstPostId". Instead of |- PostTypeId | - 1: Question | - 2: Answer So I want to know, why stackoverflow did not use separate table for questions title. Is it "Do not optimize yet" or does it have any logic behind it?

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  • Django message doesn't expire

    - by ninja123
    My code in the view: from django.contrib import messages messages.add_message(request, messages.INFO, 'Hello world.') I don't want to show this code to the user the second time if he/she refreshes again. How do I go about doing that? Messages don't seem to have any sort of expiry setting. There is documentation here: http://docs.djangoproject.com/en/1.2/ref/contrib/messages/#expiration-of-messages

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  • Hitting a XML API using phonegap?

    - by smnirven
    Hey folks, I am looking at using phonegap to create a mobile app that accesses a xml api, I noticed there is a HTTP class defined in phonegap http://phonegap.pbworks.com/JavaScript-API#http, but I can't seem to find anyone that has used it yet. Any examples out there or hints/tips on using the http class to access a xml api?

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  • Communication protocols in UDP

    - by Betamoo
    After many hours, I have discovered that the given udp server needs the following steps for a successful communication: 1- Send "Start Message" on a given port 2- Wait to receive from server on any port 3- Then the port dedicated to you to send further data to the server equals the port you have received on it + 1 So I am asking if this kind is a known protocol/handshaking, or it is only special to this server?? PS: All above communication were in udp sockets in C# PS: Related to a previous question: http://stackoverflow.com/questions/2757868/about-c-udp-sockets Thanks

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  • How do URL shortening service earn?

    - by Rakesh Juyal
    Yesterday i got to know about one more URL shortening service Saf.li. I think there are hundreds of websites offering such service. I always wonder how do such sites earn? After all they need money to host their data and code. Also, i really don't understand why techcrunch said this:- http://techcrunch.com/2009/03/30/if-bitly-is-worth-8-million-tinyurl-is-worth-at-least-46-million/ Is there any one who can explain me this?

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  • Is there any way to send a mail from within my iPhone application?

    - by Mustafa
    I want to send an email from within my iPhone application, primarily because i don't want to quit my application. Is there ANY way to do that? Solution: 1) I found this open source API which does that: http://code.google.com/p/skpsmtpmessage/ Anyone can write their own smtp client for this purpose. (If you can invest that much time - that is) 2) Use a web service to send the message details and handle message sending functionality at server end. Thanks.

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  • iPad App Cookies Storage?

    - by Aakburns
    Hi, I have an application that sends you to one website that shows a login form. I've read up on cookies from the apple reference (http://developer.apple.com/iphone/library/documentation/Cocoa/Reference/Foundation/Classes/NSHTTPCookie_Class/Reference/Reference.html#//apple_ref/occ/instm/NSHTTPCookie/initWithProperties:) I'm honestly just not understanding this at all. Can someone please explain how to get cookies working for an app? Post sample code? Thanks.

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  • Updating the MSI for a Project in Visual Studio 2008.

    - by Gunner
    In reference to the post below, where it says I should increase the version number for older versions to be replaced by newer ones. http://stackoverflow.com/questions/40603/msi-installer-fails-without-removing-a-previous-install What I find is, just changing the version number didn't do the job. I had to change the product code also, which I got an option to change through a Message Box just after changing the Version Number. Is this how it's supposed to be?

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  • How can I get the next page of friends using the Twitter API?

    - by vakas
    I am using the api twitterizer2 downloaded from http://code.google.com/p/twitterizer/downloads/list but when I try to get the friends of a user I get 100 friends but I can't get the next 100 friends through the NextPage function. How can I handle this...? Twitterizer.TwitterUserCollection userFollowing = Tw.TwitterUser.GetFriends(tokens,TwitterUrl); Twitterizer.TwitterUserCollection page2=userFollowing.NextPage; When I get the next page it returns the same 100 users.

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  • Call Mono C# Compiler

    - by Lennie
    Hi, For calling MS C# compiler there is CSharpCodeProvider (http://msdn.microsoft.com/en-us/library/microsoft.csharp.csharpcodeprovider.aspx) but how do I call the Mono compiler? I want to know if there was any errors after compilation.

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