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Editorial Team
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Asked: 2026-06-18T16:19:59+00:00

In a WPF user control declaration I have the following style define: <UserControl.Resources> <Style

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In a WPF user control declaration I have the following style define:

<UserControl.Resources>
  <Style x:Key="Datagrid" TargetType="{x:Type DataGrid}">
     <Setter Property="Background" Value="Transparent"/>

     <Setter Property="BorderBrush" Value="Transparent"/>
     <Setter Property="HeadersVisibility " Value="Column"/>
     <Setter Property="VerticalGridLinesBrush " Value="{StaticResource DatagridVerticalLinesBrush}"/>
     <Setter Property="HorizontalGridLinesBrush " Value="Transparent"/>
     <Setter Property="RowHeaderWidth " Value="0"/>
     <Setter Property="CanUserAddRows " Value="False"/>
     <Setter Property="CanUserDeleteRows " Value="False"/>
  </Style>
</UserControl.Resources>

The problem is that the Visual Studio 2012 designer thinks the properties don’t exist on the type DataGrid. It says that: the member “XXXXXXXXXXXX” is not recognized or is not accessible.

Despite the errors, the style is applied correctly at run time and the properties exist on the DataGrid (they are DependencyProperies) and are public.

Any idea what could be causing it to think they don’t exist or why are they inaccessible to the designer?

By the way, the Background property is ok. It’s only the other 7 that have errors.

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1 Answer

  1. Editorial Team

    I have loaded this up in VS2012, created a UserControl, added the above style. I observed that the Background and BorderBrush properties are seen as valid, but the others are not.

    Then…I noticed the spaces in the quoted names. Once removed all is well…

    <UserControl.Resources>
    <Style x:Key="Datagrid" TargetType="{x:Type DataGrid}">
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="HeadersVisibility" Value="Column"/>

        <Setter Property="BorderBrush" Value="Transparent"/>
        <Setter Property="VerticalGridLinesBrush" Value="{StaticResource DatagridVerticalLinesBrush}"/>
        <Setter Property="HorizontalGridLinesBrush" Value="Transparent"/>
        <Setter Property="RowHeaderWidth" Value="0"/>
        <Setter Property="CanUserAddRows" Value="False"/>
        <Setter Property="CanUserDeleteRows" Value="False"/>
    </Style>
</UserControl.Resources>
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