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POWPF - Styles with Custom Properties
 

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  1. POWPF - Styles with Custom Properties
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    <p>I'm developing a document number checking on my application and I wrote an attached behavior to textbox to check the text. Here's the behavior code:</p> <pre><code> public class CPFTextBehavior : Behavior&lt;TextBox&gt; { static readonly DependencyPropertyKey IsCPFPropertyKey = DependencyProperty.RegisterAttachedReadOnly("IsCPF", typeof(bool), typeof(CPFTextBehavior), new FrameworkPropertyMetadata(false)); public static readonly DependencyProperty IsCPFProperty = IsCPFPropertyKey.DependencyProperty; public static bool GetIsCPF(TextBox tb) { return (bool)tb.GetValue(IsCPFProperty); } public bool IsCPF { get { return GetIsCPF(AssociatedObject); } private set { AssociatedObject.SetValue(IsCPFPropertyKey, value); } } protected override void OnAttached() { base.OnAttached(); AssociatedObject.TextChanged += LocusProject.Validacao.CPF_CNPJValidation.ValidateCPF; AssociatedObject.PreviewTextInput += LocusProject.Validacao.CPF_CNPJValidation.ValidateCPFMask; DataObject.AddPastingHandler(AssociatedObject, LocusProject.Validacao.CPF_CNPJValidation.PastingCPFMask); AssociatedObject.PreviewKeyDown += Interactivity.PreventInsertKey; } protected override void OnDetaching() { base.OnDetaching(); AssociatedObject.TextChanged -= LocusProject.Validacao.CPF_CNPJValidation.ValidateCPF; AssociatedObject.PreviewTextInput -= LocusProject.Validacao.CPF_CNPJValidation.ValidateCPFMask; DataObject.RemovePastingHandler(AssociatedObject, LocusProject.Validacao.CPF_CNPJValidation.PastingCPFMask); AssociatedObject.PreviewKeyDown -= Interactivity.PreventInsertKey; } } </code></pre> <p>And here's what i'm doing on my ResourceDictionary:</p> <pre><code>&lt;ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:i="clr-namespace:LocusProject"&gt; &lt;Style TargetType="{x:Type TextBox}" x:Key="TextFields"&gt; &lt;Setter Property="BorderBrush" Value="DarkBlue"/&gt; &lt;Setter Property="BorderThickness" Value="1"/&gt; &lt;Style.Triggers&gt; &lt;EventTrigger RoutedEvent="TextBox.GotFocus"&gt; &lt;EventTrigger.Actions&gt; &lt;BeginStoryboard&gt; &lt;Storyboard&gt; &lt;ColorAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)"&gt; &lt;SplineColorKeyFrame KeyTime="00:00:00.0000000" Value="White"/&gt; &lt;SplineColorKeyFrame KeyTime="00:00:00.3500000" Value="LightBlue"/&gt; &lt;/ColorAnimationUsingKeyFrames&gt; &lt;/Storyboard&gt; &lt;/BeginStoryboard&gt; &lt;/EventTrigger.Actions&gt; &lt;/EventTrigger&gt; &lt;EventTrigger RoutedEvent="TextBox.LostFocus"&gt; &lt;EventTrigger.Actions&gt; &lt;BeginStoryboard&gt; &lt;Storyboard&gt; &lt;ColorAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetProperty="(Panel.Background).(SolidColorBrush.Color)"&gt; &lt;SplineColorKeyFrame KeyTime="00:00:00.0000000" Value="LightBlue"/&gt; &lt;SplineColorKeyFrame KeyTime="00:00:00.3500000" Value="White"/&gt; &lt;/ColorAnimationUsingKeyFrames&gt; &lt;/Storyboard&gt; &lt;/BeginStoryboard&gt; &lt;/EventTrigger.Actions&gt; &lt;/EventTrigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;Style TargetType="{x:Type TextBox}" x:Key="CPFField" BasedOn="{StaticResource TextFields}"&gt; &lt;Setter Property="i:CPFTextBehavior.IsCPF" Value="True" /&gt; &lt;/Style&gt; </code></pre> <p></p> <p>But here's the thing. It says "Exception has been thrown by the target of invocation." and I can't get it to work.</p> <p>Am I doing something wrong? Thanks in advance.</p>
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    1. USConrad Clark
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    1. COThe TargetInvocationException has an InnerException property. Please check that for the location of the real exception.
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      1. POWPF - Styles with Custom Properties
      1. USFemaref
 

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