Vista - Set BorderThickness.Top Property in Trigger with TemplateBinding

Hi @all,

I would like a custom style and template for my controls design. in my
control template, i have many borders and other controls. For one or more
borders i would like use different borders(Top,Bottom and Left and die other
not). In the C#- Codebehind i have create a dependency property from type
double. In my ResourceDictionary i would like use the dependency property in
a Tricker. Here is my Example.

C#----------
......
public double TopBorderThickness
{
get { return (double)GetValue(TopBorderThicknessProperty); }
set { SetValue(TopBorderThicknessProperty, value); }
}

// Using a DependencyProperty as the backing store for
TopBorderThickness. This enables animation, styling, binding, etc...
public static readonly DependencyProperty TopBorderThicknessProperty =
DependencyProperty.Register("TopBorderThickness",
typeof(double), typeof(MyButton), new UIPropertyMetadata(0.0));

.......
C#----------

ResourceDictionary--------------------

<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:MyNamespace="clr-namespace:WindowsApplication1"
>
<Style x:Key="{x:Type MyNamespace:MyButton}" TargetType="{x:Type
MyNamespace:MyButton}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type MyNamespace:MyButton}">
<Grid x:Name ="m_ButtonGrid"
>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.5*" />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="0.5*" />
<RowDefinition />
</Grid.RowDefinitions>
<Border x:Name ="m_ButtonBackground"
Grid.Column="0"
Grid.ColumnSpan="2"
Grid.Row="0"
Grid.RowSpan="2"
Background="DarkGray"
BorderBrush="AliceBlue"
>
</Border>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="ShowTopBorder" Value="True">
<Setter TargetName="m_ButtonBackground"
Property="Thickness.Top" Value="{TemplateBinding TopBorderThickness}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>

ResourceDictionary--------------------

When i run my application, the compiler write the following error message.

Error at element 'Setter' in markup file
'WindowsApplication1;component/MyButtonStyle.xaml' : 'Thickness.Top' property
is not a DependencyProperty on the Template's TargetType class
'System.Windows.Controls.Border'. Verify the Template's TargetType, or use
Class.Property syntax to specify the property.

Wat is my error? Can i not set the Thickness.Top property?

Thanks for help.

TOM_MUE
www.tom-mue.de

"Thickness" or even "Thickness.Top" are not existing properties...

However, Control class defines a BorderThickness property of type
Thickness...

Thickness is a structure with Left, Right, Bottom and Top members,
which can be set independently...

It can also be done in XAML:

<Control BorderThickness="3" /> --> This sets all 4 members to "3"

<Control BorderThickness="3,4,5,6" /> --> left,top,right,bottom

Otherwise, you can build a converter which builds a thickness based on
the parameters you wish!

What you are looking for is the Border.BorderThickness
Thomas Mueller wrote:
> Hi @all,
>
> I would like a custom style and template for my controls design. in my
> control template, i have many borders and other controls. For one or more
> borders i would like use different borders(Top,Bottom and Left and die other
> not). In the C#- Codebehind i have create a dependency property from type
> double. In my ResourceDictionary i would like use the dependency property in
> a Tricker. Here is my Example.
>
> C#----------
> .....
> public double TopBorderThickness
> {
> get { return (double)GetValue(TopBorderThicknessProperty); }
> set { SetValue(TopBorderThicknessProperty, value); }
> }
>
> // Using a DependencyProperty as the backing store for
> TopBorderThickness. This enables animation, styling, binding, etc...
> public static readonly DependencyProperty TopBorderThicknessProperty =
> DependencyProperty.Register("TopBorderThickness",
> typeof(double), typeof(MyButton), new UIPropertyMetadata(0.0));
>
> ......
> C#----------
>
> ResourceDictionary--------------------
>
> <ResourceDictionary
> xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
> xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
> xmlns:MyNamespace="clr-namespace:WindowsApplication1"
> >
> <Style x:Key="{x:Type MyNamespace:MyButton}" TargetType="{x:Type
> MyNamespace:MyButton}">
> <Setter Property="Template">
> <Setter.Value>
> <ControlTemplate TargetType="{x:Type MyNamespace:MyButton}">
> <Grid x:Name ="m_ButtonGrid"
> >
> <Grid.ColumnDefinitions>
> <ColumnDefinition Width="0.5*" />
> <ColumnDefinition />
> </Grid.ColumnDefinitions>
> <Grid.RowDefinitions>
> <RowDefinition Height="0.5*" />
> <RowDefinition />
> </Grid.RowDefinitions>
> <Border x:Name ="m_ButtonBackground"
> Grid.Column="0"
> Grid.ColumnSpan="2"
> Grid.Row="0"
> Grid.RowSpan="2"
> Background="DarkGray"
> BorderBrush="AliceBlue"
> >
> </Border>
> </Grid>
> <ControlTemplate.Triggers>
> <Trigger Property="ShowTopBorder" Value="True">
> <Setter TargetName="m_ButtonBackground"
> Property="Thickness.Top" Value="{TemplateBinding TopBorderThickness}" />
> </Trigger>
> </ControlTemplate.Triggers>
> </ControlTemplate>
> </Setter.Value>
> </Setter>
> </Style>
> </ResourceDictionary>
>
> ResourceDictionary--------------------
>
> When i run my application, the compiler write the following error message.
>
> Error at element 'Setter' in markup file
> 'WindowsApplication1;component/MyButtonStyle.xaml' : 'Thickness.Top' property
> is not a DependencyProperty on the Template's TargetType class
> 'System.Windows.Controls.Border'. Verify the Template's TargetType, or use
> Class.Property syntax to specify the property.
>
> Wat is my error? Can i not set the Thickness.Top property?
>
> Thanks for help.
>
> TOM_MUE
> www.tom-mue.de