Dependency Property in WPF / SilverLight

Question

I searched on google about how to get started with the dependency property used in WPF / silverlight, but didn't understand the dependency property, could anyone tell me about this from a novice point of view, so I get some idea about this and I use it in my project

early.

Can someone give me a link or sample code for a simple application that explains in a simple way what a dependency property is ??? I'll be very grateful

Answer 1

I find that the DependencyProperty implementation often includes four parts:

• DependencyProperty itself
• Property with get and set
• Static Modified Handler

UserControl, DataContext, UserControl. , SoUserControl:

    #region SampleProperty // Demo for SO 2424526

    public static readonly DependencyProperty SamplePropertyProperty
        = DependencyProperty.Register("SampleProperty", typeof(int), typeof(SoUserControl), new PropertyMetadata(OnSamplePropertyChanged));


    /// <summary>
    /// Demo for SO 2424526
    /// Gets or sets dependency property.
    /// </summary>
    public int SampleProperty
    {
        get { return (int)GetValue(SamplePropertyProperty); }
        set { SetValue(SamplePropertyProperty, value); }
    }

    /// <summary>
    /// Handld changes to SamplePropertyProperty by calling a handler in the associated object.
    /// </summary>
    /// <param name="obj">object the property is associated with</param>
    /// <param name="e">details of change</param>
    static void OnSamplePropertyChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
    {
        (obj as SoUserControl).OnSamplePropertyChanged(e);
    }

    /// <summary>
    /// Handle changes to the SamplePropertyProperty dependency property.
    /// </summary>
    /// <param name="e">details of change</param>
    private void OnSamplePropertyChanged(DependencyPropertyChangedEventArgs e)
    {
        int SamplePropertyNewValue = (int)e.NewValue;
        // do something with the internal logic of the control
    }

    #endregion

Answer 2

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: http://msdn.microsoft.com/en-us/library/ms752914.aspx, http://www.wpftutorial.net/DependencyProperties.html

Answer 3

: http://msmvps.com/blogs/luisabreu/

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Answer 4

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DependencyObject ( , , ).

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, : http://blog.hackedbrain.com/2004/12/04/understanding-dependencyobject-and-dependencyproperty/

Answer 5

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WPF Visual Sutdio 2005 Manning.

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, - MSDN WPF Property Dependency.