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POPass view to viewmodel with datatemplate
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  1. POPass view to viewmodel with datatemplate
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    copied!<p>I have a window named <code>ParameterEditorView</code> with a <code>ParameterEditorViewModel</code> as <code>DataContext</code>. In the <code>ParameterEditorViewModel</code> I have a list of <code>ParameterViewModel</code>. In the <code>ParameterEditorView</code> I have an <code>ItemsControl</code> whose <code>ItemsSource</code> is binded to the list of <code>ParameterViewModel</code> in the <code>ParameterEditorViewModel</code>. I need the <code>ParameterViewModel</code> to have a reference to the ParameterView (more on that later). In the <code>Resources</code> section of the <code>ParameterEditorView</code> I add the <code>DataTemplate</code>:</p> <pre><code>&lt;DataTemplate DataType="{x:Type my:ParameterViewModel}" &gt; &lt;my:ParameterView HorizontalAlignment="Left"/&gt; &lt;/DataTemplate&gt; </code></pre> <p>So, how can I pass a reference of the <code>ParameterView</code> that is created to show the <code>ParameterViewModel</code> to it? </p> <p>The reason I need the <code>ParameterView</code> in the <code>ParameterViewModel</code> is the following: I have a <code>TextBox</code> whose <code>Text</code> property is binded to the <code>PropertyModelView.Name</code> property. But I want to display a default string when the <code>Name</code> is empty or Null. I've tried to set the property value to the default string I want when that happens but the <code>TextBox.Text</code> is not set in this scenario. I do something like this:</p> <pre><code>private string _name; public string Name { get { return _name; } set { if (value == null || value.Length == 0) Name = _defaultName; else _name = value; } } </code></pre> <p>I've also tried to specifically set the <code>TextBox.Text</code> binding mode to TwoWay without success. I think this is a defense mechanism to prevent an infinite loop from happening but I don't know for sure. Any help on this front would also be highly appreciated.</p> <p>Thanks, José Tavares</p>
 

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