xaml

How to create a WPF UserControl with NAMED content

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The answer is to not use a UserControl to do it. Create a class that extends ContentControl public class MyFunkyControl : ContentControl { public static readonly DependencyProperty HeadingProperty = DependencyProperty.Register(“Heading”, typeof(string), typeof(MyFunkyControl), new PropertyMetadata(HeadingChanged)); private static void HeadingChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { ((MyFunkyControl) d).Heading = e.NewValue as string; } public string Heading { get; set; … Read more

Bind TextBox on Enter-key press

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You can make yourself a pure XAML approach by creating an attached behaviour. Something like this: public static class InputBindingsManager { public static readonly DependencyProperty UpdatePropertySourceWhenEnterPressedProperty = DependencyProperty.RegisterAttached( “UpdatePropertySourceWhenEnterPressed”, typeof(DependencyProperty), typeof(InputBindingsManager), new PropertyMetadata(null, OnUpdatePropertySourceWhenEnterPressedPropertyChanged)); static InputBindingsManager() { } public static void SetUpdatePropertySourceWhenEnterPressed(DependencyObject dp, DependencyProperty value) { dp.SetValue(UpdatePropertySourceWhenEnterPressedProperty, value); } public static DependencyProperty GetUpdatePropertySourceWhenEnterPressed(DependencyObject dp) { … Read more

What does the WPF star do (Width=”100*”)

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In a WPF Grid, Width=”*” or Height=”*” means proportional sizing. For example: to give 30% to column 1 and 70% to column 2 – <ColumnDefinition Width=”3*” /> <ColumnDefinition Width=”7*” /> And likewise for rows – <RowDefinition Height=”3*” /> <RowDefinition Height=”7*” /> The numbers do not have to be integers. If the Width for RowDefinition (Height … Read more

Access parent DataContext from DataTemplate

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I had problems with the relative source in Silverlight. After searching and reading I did not find a suitable solution without using some additional Binding library. But, here is another approach for gaining access to the parent DataContext by directly referencing an element of which you know the data context. It uses Binding ElementName and … Read more

How do I bind a WPF DataGrid to a variable number of columns?

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Here’s a workaround for Binding Columns in the DataGrid. Since the Columns property is ReadOnly, like everyone noticed, I made an Attached Property called BindableColumns which updates the Columns in the DataGrid everytime the collection changes through the CollectionChanged event. If we have this Collection of DataGridColumn’s public ObservableCollection<DataGridColumn> ColumnCollection { get; private set; } … Read more

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