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POWPF Changing column width at runtime
 

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    <p>I have an WPF application that contains a grid. The grid is split into 3 columns with the 3rd grid having zero width upon loading.</p> <p>I have two datagrids in the other two columns. When the selected item in one of the datagrid changes the other datagrid changes it display values, i.e. a master detail template. This all works fine.</p> <p>There is one value in the datagrid that if selected I wish this 3rd column to changes its width from zero to 2*. I don't know how to do this?</p> <p><strong>EDIT</strong></p> <p>I wish to achieve this through XAML. I have been looking at data triggers &amp; value converters. I written some code below quickly to test. I have read that setting the column to width=0 there is probably higher on the dependency property setting precedence list. Is there anyway to do this or will I need to use code behind?</p> <pre><code> &lt;Grid&gt; &lt;Grid.ColumnDefinitions&gt; &lt;ColumnDefinition/&gt; &lt;ColumnDefinition Width="2*"/&gt; &lt;ColumnDefinition Width="0"/&gt; &lt;/Grid.ColumnDefinitions&gt; &lt;DataGrid Grid.Column="0" ItemsSource="{Binding OrderList}" SelectedItem="{Binding OrderSelected}" AutoGenerateColumns="True"&gt; &lt;/DataGrid&gt; &lt;TextBox Grid.Column="1" Text="{Binding OrderSelected.Name}"&gt; &lt;/TextBox&gt; &lt;Grid x:Name="columnHideSeek" Grid.Column="2" Background="Blue"&gt; &lt;Grid.Style&gt; &lt;Style&gt; &lt;Style.Triggers&gt; &lt;DataTrigger Binding="{Binding OrderSelected.Name}" Value="Mark"&gt; &lt;Setter Property="Grid.Width" Value="10"/&gt; &lt;/DataTrigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;/Grid.Style&gt; &lt;/Grid&gt; &lt;/Grid&gt; </code></pre>
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