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    <p>I'll come back and add more detail to this later, but here's basically what I think needs to happen.</p> <p>The click should have a <code>DelegateCommand</code> type implementation, that contains a reference to the view models of both A and B. You need some kind of "conductor" class that is instantiating the view models, and which can pass the appropriate references into the command object.</p> <hr/> <p>So, clearly the command belongs in the View Model for A, <em>but</em>, it needs a reference to B. So set up the command class with that in mind:</p> <pre><code>public MyCommand : ICommand { private readonly ViewModelA _a, ViewModelB _b; public MyCommand(ViewModelA a, ViewModelB b) { _a = a; _b = b; } public bool CanExecute(object arg) { // can-execute logic here } public void Execute(object arg) { _b.StateDataRequestedCommand.Execute(""); _a.ProcessInfoRequestedCommand.Execute(""); } } </code></pre> <p>Now, but an instance of <em>MyCommand</em> into A's View Model...</p> <pre><code>public MyCommand StateRequestedCommand { get; set; } </code></pre> <p>And bind to it as normal...</p> <pre><code>&lt;telerik:RadButton Command="{Binding StateRequestedCommand}" /&gt; </code></pre> <p>Now, the challenge is to instantiate this class within A's View Model somehow. I normally use NInject to inject external dependencies into classes, but there are different ways to do it. Either way, it has to happen at a higher level than ViewModelA itself, since it doesn't have a reference to ViewModelB. That could be in the App_Startup logic, or in IoC (eg, NInject) bindings, or in a View Model "Locator", if that's what you're using.</p>
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    1. POTo pass a delegate/command as a parameter to another command in MVVM
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    1. COI am interested in knowing more about this solution, so please come back and elaborate this.
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    2. CO@Shankar I updated my answer. Maybe a bit vague still, but I hope it helps in some way.
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    3. COThank you dbaseman, this is good solution, and using Prism, the View models can be injected easily.
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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