Modifying the RowHeaders in the Datagrid

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  • Last Post 02 May 2017
DerekMaciak posted this 02 May 2017

By default, row headers will show an image that is specified by the A4DN_EntityImage property of an entity. By default this is set to the module image. The getter of this property can be modified in the entity to return different values based on business rules. For example, a different image can be used to represent that an order is finalized.

Here is example code taken from a Purchase Order Entity:

public override string A4DN_EntityImage
{
    get
    {
        return IsOrderFinalized == true ? "ok" : "check-mark-gray";
    }
}

If the property IsOrderFInalized is true, the image will use the png name "ok" otherwise it will be "check-mark-gray".  You can supply any condition you need as long as you return an image name.  The image name can exist in the Acclerator images folder or your own WPF shared images folder.  Also, if you defined the key "System.16PixelImageSuffix" in your app.config, then the Acclerator runtime will look for the image name you return with the 16 Pixel Image Suffix before it looks for just the returned image name. In the example above, it will look for check-mark-gray_16_16_32.png before it looks for check-mark-gray.png.  It will also hunt your WPF shared images folder before looking in the Acclerator images folder.

wpf datagrid
DerekMaciak posted this 02 May 2017

The look of the row header can also be completely redefined by adding a DataTemplate with a key of “AB_DataGridDefaultRowHeaderTemplate” to the resources of the content window, module level resources, or the system level resources. The following XAML example shows a DataTemplate that shows the module image and the IsOrderFinalizedImage. The IsOrderFinalizedImage just returns an image name similar to the property A4DN_EntityImage Property override above.

<DataTemplate x:Key="AB_DataGridDefaultRowHeaderTemplate">
    <StackPanel Orientation="Horizontal">
        <Image Width="12" Height="12" Source="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type DataGridRow}}, Path=DataContext.A4DN_EntityImage, Converter={StaticResource MultiSizeImageSourceConverter}, ConverterParameter=16PixelImage}" />
        <Image Width="12" Height="12" Source="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type DataGridRow}}, Path=DataContext.IsOrderFinalizedImage, Converter={StaticResource MultiSizeImageSourceConverter}, ConverterParameter=16PixelImage}" />
    </StackPanel>
</DataTemplate>

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