C# Language Data Annotation EditableAttribute (data modeling attribute)
Example
EditableAttribute sets whether users should be able to change the value of the class property.
public class Employee
{
[Editable(false)]
public string FirstName { get; set; }
}
Simple usage example in XAML application
<Window x:Class="WpfApplication.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:wpfApplication="clr-namespace:WpfApplication"
Height="70" Width="360" Title="Display name example">
<Window.Resources>
<wpfApplication:EditableConverter x:Key="EditableConverter"/>
</Window.Resources>
<StackPanel Margin="5">
<!-- TextBox Text (FirstName property value) -->
<!-- TextBox IsEnabled (Editable attribute) -->
<TextBox Text="{Binding Employee.FirstName, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
IsEnabled="{Binding Employee, Converter={StaticResource EditableConverter}, ConverterParameter=FirstName}"/>
</StackPanel>
</Window>
namespace WpfApplication
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
private Employee _employee = new Employee() { FirstName = "This is not editable"};
public MainWindow()
{
InitializeComponent();
DataContext = this;
}
public Employee Employee
{
get { return _employee; }
set { _employee = value; }
}
}
}
namespace WpfApplication
{
public class EditableConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
// return editable attribute's value for given instance property,
// defaults to true if not found
var attribute = value.GetType()
.GetProperty(parameter.ToString())
.GetCustomAttributes(false)
.OfType<EditableAttribute>()
.FirstOrDefault();
return attribute != null ? attribute.AllowEdit : true;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
}
