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WPF issue with Trigger

Posted on 2016-10-09
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Last Modified: 2016-10-25
I am trying to add a Trigger to a control template (for a button) and I am getting an error that says the target cannot be found. Here is a code snippet:

                <ControlTemplate TargetType="Button">
                    <Border x:Name="t"
                            Margin="{TemplateBinding Margin}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}">
                        <Border.Background>
                            <LinearGradientBrush StartPoint="0,0"
                                                 EndPoint="0,1">
                                <LinearGradientBrush.GradientStops>
                                    <GradientStop x:Name="BackgroundGradientStop1"
                                                  Offset="0"
                                                  Color="{StaticResource BackgroundColor1}" />
                                    <GradientStop x:Name="BackgroundGradientStop2"
                                                  Offset="1"
                                                  Color="{StaticResource BackgroundColor2}" />
                                </LinearGradientBrush.GradientStops>
                            </LinearGradientBrush>
                        </Border.Background>

                        <ContentPresenter Margin="{TemplateBinding Padding}" />
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsEnabled"
                                 Value="False">
                            <Setter TargetName="BackgroundGradientStop1"
                                    Property="Color"
                                    Value="White" />
                        </Trigger>

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The name "BackgroundGradientStop1" in the Setter of the Trigger is reported as not found, however it is defined before that in the code just above. The same target name is used in MultiTriggers after this one and no error is reported.

What is wrong with my code?
Sid
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Question by:Sid Price
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Accepted Solution

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Sid Price earned 0 total points
ID: 41859217
I have discovered the issue with the above code from another source, The "BackgroundGradientStop1" element is NOT derived from FrameworkElement and therefore cannot be the target of a Setter.
Sid
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