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POUserControl throws System.ArgumentException
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copied!<p>Hi i'm using an userControl it works fine but when i try to use it for second time it throws the next exception </p> <p><strong>An unhandled exception of type 'System.ArgumentException' occurred in System.Windows.dll Additional information: The parameter is incorrect.</strong> </p> <p>Here's my code </p> <p>XAML</p> <pre><code> <Grid x:Name="LayoutRoot"> <TextBlock x:Name="tb1" FontWeight="ExtraBold" Foreground="Black" Opacity="0.7" Margin="1,3,0,0" Text="{Binding Text,ElementName=me}" TextWrapping="Wrap" /> <TextBlock x:Name="tb2" FontWeight="ExtraBold" Foreground="Black" Opacity="0.7" Margin="1,3,0,0" Text="{Binding Text,ElementName=tb1}" TextWrapping="Wrap" /> <TextBlock x:Name="tb3" FontWeight="ExtraBold" Foreground="Black" Opacity="0.7" Margin="1,3,0,0" Text="{Binding Text,ElementName=tb1}" TextWrapping="Wrap" /> <TextBlock x:Name="tb4" FontWeight="ExtraBold" Foreground="Black" Opacity="0.7" Margin="1,3,0,0" Text="{Binding Text,ElementName=tb1}" TextWrapping="Wrap" /> <TextBlock x:Name="tb5" FontWeight="ExtraBold" Foreground="Black" Opacity="0.7" Margin="1,3,0,0" Text="{Binding Text,ElementName=tb1}" TextWrapping="Wrap" /> <TextBlock x:Name="tb6" FontWeight="ExtraBold" Foreground="Black" Opacity="0.7" Margin="1,3,0,0" Text="{Binding Text,ElementName=tb1}" TextWrapping="Wrap" /> <TextBlock x:Name="tb7" FontWeight="ExtraBold" Foreground="Black" Opacity="0.7" Margin="1,3,0,0" Text="{Binding Text,ElementName=tb1}" TextWrapping="Wrap" /> <TextBlock x:Name="tb8" FontWeight="ExtraBold" Foreground="White" Text="{Binding Text,ElementName=tb1}" TextWrapping="Wrap" /> </Grid> </code></pre> <p>C#</p> <pre><code> public partial class DropShadowTextBlock : UserControl { public DropShadowTextBlock() { InitializeComponent(); } public string Text { get { return (string)GetValue(TextProperty); } set { SetValue(TextProperty, value); } } public SolidColorBrush Foreground { get { return (SolidColorBrush)GetValue(ForegroundProperty); } set { SetValue(ForegroundProperty,value);} } public static void ForegroundPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) { DropShadowTextBlock control = sender as DropShadowTextBlock; if (control != null) { control.tb8.Foreground = e.NewValue as SolidColorBrush; } } public static void TextPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) { var control = sender as DropShadowTextBlock; if (control.tb1 != null) control.tb1.Text = e.NewValue.ToString(); } public static readonly DependencyProperty TextProperty = DependencyProperty.Register("Text", typeof(string), typeof(DropShadowTextBlock), new PropertyMetadata(new PropertyChangedCallback(TextPropertyChanged))); public static readonly DependencyProperty ForegroundProperty = DependencyProperty.Register("Foreground", typeof(SolidColorBrush), typeof(DropShadowTextBlock), new PropertyMetadata(new PropertyChangedCallback(ForegroundPropertyChanged))); } } </code></pre> <p>And finally here's how i use the userControl</p> <pre><code> public void dibujarTexto(String text) { DropShadowTextBlock textblockTop = new DropShadowTextBlock(); textblockTop.Text = text; textblockTop.Foreground = new SolidColorBrush(Colors.White); textblockTop.Name = Guid.NewGuid().ToString(); migrid.Children.Add(textblockTop); //this is a grid control } </code></pre> <p>I've been sharing and i found that the control names must be unique so i'm using the Guid class to get random names but doesn't work</p> <p>Please if somebody could help me.</p> <p>Thanks best regards.</p>

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