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IsObjectTypeConverter.cs
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IsObjectTypeConverter.cs
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using System;
using System.Globalization;
using System.Windows.Data;
namespace Sharp.Utils.Wpf
{
/// <summary>
/// A converter that converts to a boolean value that indicates whether the input object is an instance of a certain type
/// </summary>
[ValueConversion(typeof(object), typeof(bool), ParameterType = typeof(Type))]
public class IsObjectTypeConverter : OneWayValueConverter
{
/// <summary>
/// Converts a value.
/// </summary>
/// <param name="value">The value produced by the binding source.</param>
/// <param name="targetType">The type of the binding target property.</param>
/// <param name="parameter">The converter parameter to use.</param>
/// <param name="culture">The culture to use in the converter.</param>
/// <returns>The converted value.</returns>
public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (parameter == null)
throw new ArgumentNullException("parameter", "ConverterParameter is required.");
if (!(parameter is Type))
throw new ArgumentException("parameter must be a type.", "parameter");
var expectedType = (Type)parameter;
if (value == null)
return false;
var type = value.GetType();
return expectedType.IsAssignableFrom(type);
}
}
}