Binding in WPF

What Is Data Binding?

Data binding is the process that establishes a connection between the application UI and business logic. If the binding has the correct settings and the data provides the proper notifications, then, when the data changes its value, the elements that are bound to the data reflect changes automatically. Data binding can also mean that if an outer representation of the data in an element changes, then the underlying data can be automatically updated to reflect the change. For example, if the user edits the value in a TextBox element, the underlying data value is automatically updated to reflect that change.

There are 4 types of Binding Modes in WPF:

1. OneWay
2. TwoWay
3. OneWayToSource
4. OneTime

<Window x:Class="Example00.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300">
    <Grid  >   
        <Grid.RowDefinitions >
            <RowDefinition Height="*" />
            <RowDefinition Height="*" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <TextBox Name="mySourceElement" Grid.Row="0" >Hello World</TextBox>
        <TextBlock Grid.Row="1">            
            <TextBlock.Text>
                <Binding ElementName="mySourceElement" Path="Text"  />
            </TextBlock.Text>
        </TextBlock> 
        
        <TextBlock Text="{Binding ElementName=mySourceElement,Path=Text }" Grid.Row="2" />
    </Grid>
</Window>