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PO
 

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  1. PO
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    <p>Personally I think that if you're using MVVM then you should have the code remain in your ViewModel. so if your VM is like this:</p> <pre><code>public class MyViewModel { public ObservableCollection&lt;string&gt; myColl {get;set;} public string SelectedString {get;set;} public bool IsEnabled { get { return SelectedString == "Desired string value";} } } </code></pre> <p>You then would just bind the textboxes IsEnabled property to your IsEnabled property on your ViewModel</p> <p>The reason I say this is your requirements may change as to when to have the textboxes enabled and if you do it this way you don't have to touch your view(where code/logic should not reside)</p> <p>So now you do this in your view and thats it</p> <pre><code>&lt;TextBox IsEnabled={Binding IsEnabled} Text={Binding SelectedString}/&gt; </code></pre> <p>Hope I understand your problem and that this helps</p>
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    1. POWPF Bind Textbox IsEnabled to Listbox SelectedItem
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    1. USJose
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      1. VTUpMod
    1. COFirst i thought "why do it this way"?? because you suggest don't put any "logic" (like i'm doing) in XAML but in the VM. The enabling (or not) of a textbox is tightly coupled to XAML (i mean if i want to "adjust" a property of a UI-element, i will do it in XAML, so i will see that there is something set (or not)). So (as i understand) you 're transferring the solution to another place in the same arena! The only thing i don't like is to let the VM-code "clutter" around. Thanks Jose!
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      1. USSavvas Sopiadis
    2. COYour VM should have all the code, your view should translate that to some visible representation(sometimes using converters). That could be disabling, making invisible, popping some kind of notification. Your VM shouldn't care what that is, but it should know that there is a specific state. The View then binds to that property. The closest to code that should be in the view is Converters because this decouples your View from your VM. E.g. a boolean to visibility converter allows your VM to have a boolean property while the View translates that boolean to 'Collapsed' or 'Visible'21
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    3. COYour view is basically just a visual translator. It translates lists into a combobox,listbox, or listview. A string,int,long,DateTime into a textbox. Of course your View and VM are "coupled" but only in the sense that your view needs to know what it's translating. Your View needs to know the ViewModel, but the ViewModel should never know about your View, when that happens the separation of concerns which MVVM brings in is severely compromised. I should be able to pop a VM into a Winforms app and it should not require any code change, just rebinding to the new desired View, but WPF is easier :)
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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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