Custom WPF Control Dependency Property Not Binding to external DP?

When you set RandomNumber in code, your binding is overwritten. This is generally true unless the binding is Mode=TwoWay or the RandomNumber has metadata BindsTwoWayByDefault Try making RandomNumber be BindsTwoWayByDefault: public static readonly DependencyProperty RandomNumberProperty = DependencyProperty. Register( "RandomNumber", typeof(int), typeof(Tester), new FrameworkPropertyMetadata { BindsTwoWayByDefault = true, }).

When you set RandomNumber in code, your binding is overwritten. This is generally true unless the binding is Mode=TwoWay or the RandomNumber has metadata BindsTwoWayByDefault. Try making RandomNumber be BindsTwoWayByDefault: public static readonly DependencyProperty RandomNumberProperty = DependencyProperty.

Register( "RandomNumber", typeof(int), typeof(Tester), new FrameworkPropertyMetadata { BindsTwoWayByDefault = true, }).

You're quick - You're accurate - You're... you're my heeero :) Thanks for the quick reply - this worked perfectly! – John Nov 5 '09 at 16:16.

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