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    <p>There are a few ways that you can achieve your requirements. It's a little bit inconvenient because we have to apply a <code>Style</code> with a <code>Trigger</code> on the columns of the <code>DataGrid</code> rather than the <code>DataGrid</code> itself. This means that you can't use the <code>AutoGenerateColumns</code> feature and you'll have to define them all manually as I have below. Try this:</p> <pre><code>&lt;DataGrid ItemsSource="{Binding YourItems}" AutoGenerateColumns="False"&gt; &lt;DataGrid.Resources&gt; &lt;Style x:Key="BackgroundColourStyle" TargetType="{x:Type TextBlock}"&gt; &lt;Style.Triggers&gt; &lt;Trigger Property="Text" Value="1"&gt; &lt;Setter Property="Background" Value="LightGreen" /&gt; &lt;/Trigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;/DataGrid.Resources&gt; &lt;DataGrid.Columns&gt; &lt;DataGridTextColumn Binding="{Binding YourPropertyName}" ElementStyle="{StaticResource BackgroundColourStyle}"&gt; &lt;/DataGridTextColumn&gt; &lt;/DataGrid.Columns&gt; &lt;/DataGrid&gt; </code></pre> <hr> <p>UPDATE >>></p> <p>Ok, so to do this with a variable value, you'd be better off doing this the WPF data-centric way. As usual in WPF, we want to create data objects with <em>all</em> of the properties that we need to display in the UI. As such, you'd need to add a new <code>bool</code> property into whatever data type class that you are displaying in the <code>DataGrid</code>... maybe add a new column for that if you insist on using a <code>DataTable</code>.</p> <p>However, I'd advise you to use a class and if you create one, you must ensure that you implement the <code>INotifyPropertyChanged</code> interface correctly in it. You could add properties into it like this:</p> <pre><code>public int NumberValue { get; set; } // implement `INotifyPropertyChanged` here public bool HasHighlightValue { get; set; } // implement `INotifyPropertyChanged` here </code></pre> <p>Then we could use this property to highlight the relevant cell in the <code>DataGrid</code>:</p> <pre><code>&lt;Style x:Key="BackgroundColourStyle" TargetType="{x:Type TextBlock}"&gt; &lt;Style.Triggers&gt; &lt;Trigger Property="HasHighlightValue" Value="True"&gt; &lt;Setter Property="Background" Value="LightGreen" /&gt; &lt;/Trigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; </code></pre> <p>Finally, you can set this new property in a handler or code behind in response to some user action:</p> <pre><code>// reset previous cell value YourDataType previousItem = YourItems.Where(I =&gt; i.HasHighlightValue).Single(); previousItem.HasHighlightValue = false; // set new cell value YourDataType item = YourItems.Where(I =&gt; i.NumberValue == relevantNumber).Single(); item.HasHighlightValue = true; </code></pre>
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    1. COIm looking for a dynamic solution, and the value was just an example, it could be any value
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    2. COWhat does *dynamic solution* mean?
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    3. COsomething that works for any value I require of which may be undetermined to myself.
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