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POHow do you access the MainViewModel in ViewModelLocator from code behind?
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  1. POHow do you access the MainViewModel in ViewModelLocator from code behind?
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    copied!<p>Building a WP7 app using MVVM light for my view models. I'm using the ViewModelLocator that gets added when you add the library through NuGet. Works great but now I need to get access to a ViewModel from code.</p> <p>In my code the user clicks a button and I need to search the MainViewModel (which contains several view models) and find one based on the criteria the user entered.</p> <p>Normally I would just response to the Click event of the button but I don't have an instance variable of the ViewModelLocator class to get a hold of the MainViewModel to perform the search. With the default template (non-MVVMLight) for Windows Phone 7, the App class has a static variable to the main view model so you can access it anytime with App.ViewModel.</p> <p>There's some talk from twitter about using commands which would be good, but at some point I have to perform a code search across multiple vms to get the results I need. Probably need to inject a ISearchViewModel service into the View or something to make this work.</p> <p>Here's the implementation of ViewModelLocator that is provided:</p> <pre><code>public class ViewModelLocator { private static MainViewModel _main; public ViewModelLocator() { _main = new MainViewModel(); } [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1822:MarkMembersAsStatic", Justification = "This non-static member is needed for data binding purposes.")] public MainViewModel Main { get { return _main; } } } </code></pre> <p>So from the code behind of another view, how do you get access to Main (MainViewModel contains all the lists of data and has a search method I call)? Or Should you?</p> <p>Just wondering how people are solving this type of problem?</p> <p>Thanks.</p>
 

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