How to propagate Dependency Property PropertyChanged event through binding in WPF?











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I have a UserControl, which contains a DependencyProperty (string) in it's code behind. The property works fine, I am setting it from the code behind, and a label on the UserControl displays it's content properly via Binding. There is no Binding exception. The problem is: If i try to Bind something from outside to the UserControl's property, the Binding works, i can see the label displaying the string, but if the code behind changes the string, i cant receive the event at the outside Property. I even put a breakpoint in it's setter, but it never occurs. So, the question is: how do I propagate the dependency property's changed event to the outside property?










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    Questions seeking debugging help ("why isn't this code working?") must include the desired behavior, a specific problem or error and the shortest code necessary to reproduce it in the question itself. Questions without a clear problem statement are not useful to other readers. See: How to create a Minimal, Complete, and Verifiable example
    – ASh
    Nov 19 at 12:08












  • The getter and setter for a dependency property are not used for bindings (this is why your breakpoints don't get hit). You have to pass a PropertyChangedCallback as part of FrameworkPropertyMetadata in the DependencyProperty.Register function. See this answer for more information and an example.
    – Bradley Uffner
    Nov 19 at 12:52












  • Possible duplicate of How To Raise Property Changed events on a Dependency Property?
    – Bradley Uffner
    Nov 19 at 12:54















up vote
0
down vote

favorite












I have a UserControl, which contains a DependencyProperty (string) in it's code behind. The property works fine, I am setting it from the code behind, and a label on the UserControl displays it's content properly via Binding. There is no Binding exception. The problem is: If i try to Bind something from outside to the UserControl's property, the Binding works, i can see the label displaying the string, but if the code behind changes the string, i cant receive the event at the outside Property. I even put a breakpoint in it's setter, but it never occurs. So, the question is: how do I propagate the dependency property's changed event to the outside property?










share|improve this question







New contributor




Bence Mányoki is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
















  • 1




    Questions seeking debugging help ("why isn't this code working?") must include the desired behavior, a specific problem or error and the shortest code necessary to reproduce it in the question itself. Questions without a clear problem statement are not useful to other readers. See: How to create a Minimal, Complete, and Verifiable example
    – ASh
    Nov 19 at 12:08












  • The getter and setter for a dependency property are not used for bindings (this is why your breakpoints don't get hit). You have to pass a PropertyChangedCallback as part of FrameworkPropertyMetadata in the DependencyProperty.Register function. See this answer for more information and an example.
    – Bradley Uffner
    Nov 19 at 12:52












  • Possible duplicate of How To Raise Property Changed events on a Dependency Property?
    – Bradley Uffner
    Nov 19 at 12:54













up vote
0
down vote

favorite









up vote
0
down vote

favorite











I have a UserControl, which contains a DependencyProperty (string) in it's code behind. The property works fine, I am setting it from the code behind, and a label on the UserControl displays it's content properly via Binding. There is no Binding exception. The problem is: If i try to Bind something from outside to the UserControl's property, the Binding works, i can see the label displaying the string, but if the code behind changes the string, i cant receive the event at the outside Property. I even put a breakpoint in it's setter, but it never occurs. So, the question is: how do I propagate the dependency property's changed event to the outside property?










share|improve this question







New contributor




Bence Mányoki is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











I have a UserControl, which contains a DependencyProperty (string) in it's code behind. The property works fine, I am setting it from the code behind, and a label on the UserControl displays it's content properly via Binding. There is no Binding exception. The problem is: If i try to Bind something from outside to the UserControl's property, the Binding works, i can see the label displaying the string, but if the code behind changes the string, i cant receive the event at the outside Property. I even put a breakpoint in it's setter, but it never occurs. So, the question is: how do I propagate the dependency property's changed event to the outside property?







c# .net wpf






share|improve this question







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Check out our Code of Conduct.











share|improve this question







New contributor




Bence Mányoki is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked Nov 19 at 12:04









Bence Mányoki

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New contributor





Bence Mányoki is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Bence Mányoki is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.








  • 1




    Questions seeking debugging help ("why isn't this code working?") must include the desired behavior, a specific problem or error and the shortest code necessary to reproduce it in the question itself. Questions without a clear problem statement are not useful to other readers. See: How to create a Minimal, Complete, and Verifiable example
    – ASh
    Nov 19 at 12:08












  • The getter and setter for a dependency property are not used for bindings (this is why your breakpoints don't get hit). You have to pass a PropertyChangedCallback as part of FrameworkPropertyMetadata in the DependencyProperty.Register function. See this answer for more information and an example.
    – Bradley Uffner
    Nov 19 at 12:52












  • Possible duplicate of How To Raise Property Changed events on a Dependency Property?
    – Bradley Uffner
    Nov 19 at 12:54














  • 1




    Questions seeking debugging help ("why isn't this code working?") must include the desired behavior, a specific problem or error and the shortest code necessary to reproduce it in the question itself. Questions without a clear problem statement are not useful to other readers. See: How to create a Minimal, Complete, and Verifiable example
    – ASh
    Nov 19 at 12:08












  • The getter and setter for a dependency property are not used for bindings (this is why your breakpoints don't get hit). You have to pass a PropertyChangedCallback as part of FrameworkPropertyMetadata in the DependencyProperty.Register function. See this answer for more information and an example.
    – Bradley Uffner
    Nov 19 at 12:52












  • Possible duplicate of How To Raise Property Changed events on a Dependency Property?
    – Bradley Uffner
    Nov 19 at 12:54








1




1




Questions seeking debugging help ("why isn't this code working?") must include the desired behavior, a specific problem or error and the shortest code necessary to reproduce it in the question itself. Questions without a clear problem statement are not useful to other readers. See: How to create a Minimal, Complete, and Verifiable example
– ASh
Nov 19 at 12:08






Questions seeking debugging help ("why isn't this code working?") must include the desired behavior, a specific problem or error and the shortest code necessary to reproduce it in the question itself. Questions without a clear problem statement are not useful to other readers. See: How to create a Minimal, Complete, and Verifiable example
– ASh
Nov 19 at 12:08














The getter and setter for a dependency property are not used for bindings (this is why your breakpoints don't get hit). You have to pass a PropertyChangedCallback as part of FrameworkPropertyMetadata in the DependencyProperty.Register function. See this answer for more information and an example.
– Bradley Uffner
Nov 19 at 12:52






The getter and setter for a dependency property are not used for bindings (this is why your breakpoints don't get hit). You have to pass a PropertyChangedCallback as part of FrameworkPropertyMetadata in the DependencyProperty.Register function. See this answer for more information and an example.
– Bradley Uffner
Nov 19 at 12:52














Possible duplicate of How To Raise Property Changed events on a Dependency Property?
– Bradley Uffner
Nov 19 at 12:54




Possible duplicate of How To Raise Property Changed events on a Dependency Property?
– Bradley Uffner
Nov 19 at 12:54

















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