All I am trying to do is bind a public property to a textBlock. What am I doing wrong here?
namespace WpfApplication1
{
public partial class MainWindow : Window
{
public string test { get; set; }
public MainWindow()
{
test = "this is a test";
InitializeComponent();
}
}
}
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<ObjectDataProvider x:Key="test"></ObjectDataProvider>
</Window.Resources>
<Grid>
<TextBlock Height="23" HorizontalAlignment="Left" Margin="108,58,0,0" Name="textBlock1" VerticalAlignment="Top" Text="{Binding Source={StaticResource test}}" />
</Grid>
The DataContext property is the default source of your bindings, unless you specifically declare another source, like we did in the previous chapter with the ElementName property. It's defined on the FrameworkElement class, which most UI controls, including the WPF Window, inherits from.
Custom Dependency Properties Follow the steps given below to define custom dependency property in C#. Declare and register your dependency property with system call register. Provide the setter and getter for the property. Define an instance handler which will handle any changes that occur to that particular instance.
Advertisements. Data binding is a mechanism in XAML applications that provides a simple and easy way for Windows Runtime Apps using partial classes to display and interact with data. The management of data is entirely separated from the way the data is displayed in this mechanism.
Data binding in Windows Presentation Foundation (WPF) provides a simple and consistent way for apps to present and interact with data. Elements can be bound to data from different kinds of data sources in the form of . NET objects and XML.
You can simply add a datacontext and access your property
public partial class MainWindow : Window,INotifyPropertyChanged
{
private string _test;
public string test
{
get
{
return _test;
}
set
{
_test = value;
OnPropertyChanged("test");
}
}
public MainWindow()
{
test = "this is a test";
InitializeComponent();
DataContext = this;
}
public event PropertyChangedEventHandler PropertyChanged;
private void OnPropertyChanged(String name)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(name));
}
}
}
<TextBlock Height="23" HorizontalAlignment="Left" Margin="108,58,0,0" Name="textBlock1" VerticalAlignment="Top" Text="{Binding test}"/>
Also check this post for details of when to use an ObjectDataProvider
http://bea.stollnitz.com/blog/?p=22
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