File size: 2,745 Bytes
8c763fb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | // Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
using System;
using System.Globalization;
using System.Reflection;
using System.Windows;
using System.Windows.Data;
namespace Microsoft.Management.UI.Internal
{
/// <summary>
/// Provides a way to get the <see cref="FrameworkElement.DataContext"/> of a visual ancestor.
/// </summary>
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.MSInternal", "CA903:InternalNamespaceShouldNotContainPublicTypes")]
public class VisualToAncestorDataConverter : IValueConverter
{
/// <summary>
/// Searches ancestors for data of the specified class type.
/// </summary>
/// <param name="value">The visual whose ancestors are searched.</param>
/// <param name="targetType">The parameter is not used.</param>
/// <param name="parameter">The type of the data to find. The type must be a class.</param>
/// <param name="culture">The parameter is not used.</param>
/// <returns>The data of the specified type; or if not found, <c>null</c>.</returns>
/// <exception cref="ArgumentException">The specified value is not a class type.</exception>
/// <exception cref="ArgumentNullException">The specified value is a null reference.</exception>
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
ArgumentNullException.ThrowIfNull(value);
ArgumentNullException.ThrowIfNull(parameter);
Type dataType = (Type)parameter;
if (dataType.IsClass == false)
{
throw new ArgumentException("The specified value is not a class type.", "parameter");
}
DependencyObject obj = (DependencyObject)value;
MethodInfo findVisualAncestorDataMethod = typeof(WpfHelp).GetMethod("FindVisualAncestorData");
MethodInfo genericFindVisualAncestorDataMethod = findVisualAncestorDataMethod.MakeGenericMethod(dataType);
return genericFindVisualAncestorDataMethod.Invoke(null, new object[] { obj });
}
/// <summary>
/// This method is not used.
/// </summary>
/// <param name="value">The parameter is not used.</param>
/// <param name="targetType">The parameter is not used.</param>
/// <param name="parameter">The parameter is not used.</param>
/// <param name="culture">The parameter is not used.</param>
/// <returns>The parameter is not used.</returns>
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
}
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