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The designer shows that "Binding" can only be set on the DependencyProperty of the DependencyObject error

I created a custom control that has a DependencyProperty, and when I try to bind to it, I get an error in the constructor:

"Binding" cannot be set on the "ROCValue" property of type 'RocIndicator. "Binding" can only be set on a DependencyProperty DependencyObject.

Edit: I added a static modifier, but I still get this error. and yes i restarted visual studio.

public partial class RocIndicator : UserControl
{
    public static readonly DependencyProperty ROCValueProperty =
        DependencyProperty.Register("ROCValue", typeof(double), typeof(RocIndicator),
        new FrameworkPropertyMetadata(0.0, new PropertyChangedCallback(ValueChanged)));


    public double ROCValue
    {
        get { return (double)GetValue(ROCValueProperty); }
        set { SetValue(ROCValueProperty, value); }
    }
}

this is the XAML:

<View:RocIndicator ROCValue="{Binding ROC}" Margin="0,10,0,0" HorizontalAlignment="Center" Width="35"/>

but when i build it and run it it works. why is this error displayed?

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3 answers


The dependency property declaration should be static

:



public static readonly DependencyProperty ROCValueProperty ...
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I had one problem copying a UserControl from one project to another. I tried closing the solution, restarting Visual Studio and even restarting my computer. None of them worked.

Then I unloaded and reloaded the project and that seems to fix it. (Potentially Visual Studio build error).



To unload a project, right-click on your project in Solution Explorer and click Unload Project. Then right click and click Update Project.

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I faced the same problem and solved it by deleting the "obj" folder in the project directory and rebuilding the solution.

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