WPF INotifyPropertyChanged Binding Guide

1 year ago
Liam
2 minutes

In WPF, you can use the Binding class to bind a property of an object that implements the INotifyPropertyChanged interface. Here is an example code demonstrating how to bind a TextBox in XAML to a property of a ViewModel class that implements the INotifyPropertyChanged interface.

<Window x:Class="YourNamespace.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:YourNamespace"
        Title="MainWindow" Height="350" Width="525">

    <Window.DataContext>
        <local:ViewModel/>
    </Window.DataContext>

    <Grid>
        <TextBox Text="{Binding YourProperty, Mode=TwoWay}"/>
    </Grid>
</Window>

In the code above, the ViewModel class is a ViewModel class that implements the INotifyPropertyChanged interface, with a property named YourProperty. We then use Binding on the Text property of the TextBox to bind to the YourProperty property of the ViewModel.

When the YourProperty property in the ViewModel changes, the INotifyPropertyChanged interface will notify the bound UI element (in this case the TextBox), updating the corresponding value on the UI interface. This allows for the value of the bound TextBox on the UI interface to change accordingly when the YourProperty property is modified in the ViewModel.

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