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    copied!<p>I found a solution, but I can't explain why it makes a difference:</p> <p>Change this...</p> <pre><code>&lt;data:DataGridTemplateColumn Header="Text"&gt; &lt;data:DataGridTemplateColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;TextBlock Text="{Binding Text}" &gt;&lt;/TextBlock&gt; &lt;/DataTemplate&gt; &lt;/data:DataGridTemplateColumn.CellTemplate&gt; &lt;data:DataGridTemplateColumn.CellEditingTemplate&gt; &lt;DataTemplate&gt; &lt;TextBox Text="{Binding Text, Mode=TwoWay}" /&gt; &lt;/DataTemplate&gt; &lt;/data:DataGridTemplateColumn.CellEditingTemplate&gt; &lt;/data:DataGridTemplateColumn&gt; </code></pre> <p>... to this:</p> <pre><code>&lt;data:DataGridTemplateColumn Header="Text"&gt; &lt;data:DataGridTemplateColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;TextBlock Text="{Binding Text, Mode=OneWay}" &gt;&lt;/TextBlock&gt; &lt;/DataTemplate&gt; &lt;/data:DataGridTemplateColumn.CellTemplate&gt; &lt;data:DataGridTemplateColumn.CellEditingTemplate&gt; &lt;DataTemplate&gt; &lt;TextBox Text="{Binding Text, Mode=TwoWay}" /&gt; &lt;/DataTemplate&gt; &lt;/data:DataGridTemplateColumn.CellEditingTemplate&gt; &lt;/data:DataGridTemplateColumn&gt; </code></pre> <p><br> Notice how I specified "Mode=OneWay" on the TextBlock's binding:</p> <pre><code>&lt;TextBlock Text="{Binding Text, Mode=OneWay}" &gt;&lt;/TextBlock&gt; </code></pre> <p><br> I have no idea why this should make a difference. Even if the TextBlock was set to TwoWay, why wouldn't there be any changes made to the data-bound object?</p> <p>An explanation would be greatly appreciated... I've spent about five hours banging my head against my keyboard just to get to this point, and I'd like to know why it is that I've made this mistake (assuming it's not a bug in Silverlight).</p> <p>Thanks,<br> -Charles</p>
 

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