Path
<TextBlock Text="{Binding Path=PropertyName}" />
<TextBlock Text="{Binding PropertyName}" />
Path : Name of the property on the object in the Datacontext of the page. The Path keyword is optional. The two lines above are functionally identical.
<TextBlock Text="{Binding Path=Instance.PropertyName}" />
If the object in the DataContext has is another object with properties then you can bind to it's properties by using a fullstop.
ElementName
<TextBox x:Name="SomeTextBox" />
<TextBlock Text="{Binding ElementName=SomeTextBox, Path=Text}" />
ElementName : Specifies another element in the view tree to bind to.
Path : The property on the source element to bind from.
Converter
<UserControl.Resources>
<BindingsProject:TextToColourConverter x:Key="TextToColourConverter" />
</UserControl.Resources><Grid x:Name="LayoutRoot">
<StackPanel>
<TextBox x:Name="SomeTextBox" />
<TextBlock Text="{Binding ElementName=SomeTextBox, Path=Text}" />
<TextBlock Text="Test text"
Foreground="{Binding ElementName=SomeTextBox,Path=Text, Converter={StaticResource TextToColourConverter}}" />
</StackPanel>
</Grid>
public class TextToColourConverter: IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
return someConvertedValue;
}public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
return someConvertedBackValue;
}
}
Converter : StaticResource declared in Resources. Converter is defined in codebehind and implements IValueConverter
ConverterParameter
<TextBlock Text="Test text" Foreground="{Binding ElementName=SomeTextBox,Path=Text, Converter={StaticResource TextToColourConverter}, ConverterParameter=true}" />
<TextBlock Text="Test text" Foreground="{Binding ElementName=SomeTextBox,Path=Text, Converter={StaticResource TextToColourConverter}, ConverterParameter='Blue'}" />
String parameters can be passed to the value converter. Unfortunately you can not bind to the ConverterParameter.
String Format
<TextBlock Text="{Binding Path=TimeWorked, StringFormat=hh\\:mm}" />
<TextBlock Text="{Binding Path=TimeWorked, StringFormat='h\\:mm'}" />
<TextBlock Text="{Binding Path=StartDate, StringFormat=D}" />
<TextBlock Text="{Binding Path=StartDate, StringFormat='MMM dd, yyyy'}" />
<TextBlock Text="{Binding Path=StartDate, StringFormat=MMM\ dd\,\ yyyy}" />
<TextBlock Text="{Binding Path=StartDate, StringFormat=yyyy-MM-dd}" />
Use apostrophes to enclose string formats with special characters, or use \ to escape the special character.
Null Value
<TextBlock Text="{Binding TotalAmount, TargetNullValue=0}" />
If the value from the bound property is null then it will be replaced with the TargetNullValue.
Indexed Bindings
<StackPanel>
<TextBlock Text="{Binding Path=SimpleProp1}" />
<TextBox Text="{Binding Path=ComplexProp[0].SimpleSubProp, Mode=TwoWay}" Width="200" Height="60"/>
<TextBox Text="{Binding Path=DictionaryCollection[Mineral], Mode=TwoWay}" />
</StackPanel>
You can bind to any collection that has an index (is IEnumerable). If the collection is a key/value collection such as Dictionary or Hash, then the item can be referenced by the item's key.
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