using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Reflection;
namespace chc.servicemanagertray
{
public class PropertyComparer<T> : IComparer<T>
{
private readonly IComparer comparer;
private PropertyDescriptor propertyDescriptor;
private int reverse;
public PropertyComparer(PropertyDescriptor property, ListSortDirection direction)
{
this.propertyDescriptor = property;
Type comparerForPropertyType = typeof(Comparer<>).MakeGenericType(property.PropertyType);
this.comparer = (IComparer)comparerForPropertyType.InvokeMember("Default", BindingFlags.Static | BindingFlags.GetProperty | BindingFlags.Public, null, null, null);
this.SetListSortDirection(direction);
}
#region IComparer<T> Members
public int Compare(T x, T y)
{
return this.reverse * this.comparer.Compare(this.propertyDescriptor.GetValue(x), this.propertyDescriptor.GetValue(y));
}
#endregion
private void SetPropertyDescriptor(PropertyDescriptor descriptor)
{
this.propertyDescriptor = descriptor;
}
private void SetListSortDirection(ListSortDirection direction)
{
this.reverse = direction == ListSortDirection.Ascending ? 1 : -1;
}
public void SetPropertyAndDirection(PropertyDescriptor descriptor, ListSortDirection direction)
{
this.SetPropertyDescriptor(descriptor);
this.SetListSortDirection(direction);
}
}
}
