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Auto-filter for Microsoft WPF DataGrid

, 29 Jan 2009
Allows auto filtering functionality for DataGrid columns.
WPFGridFilter.zip
WPFGridFilter
PowerCollections
PowerCollections.csproj.user
Properties
Stepi.Collections
bin
Filters
Properties
Stepi.UIFilters
bin
Initializers
Properties
Settings.settings
Themes
Test.GridSorting
bin
Debug
Test.GridFilter.vshost.exe
Properties
Settings.settings
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Reflection;

namespace Stepi.Collections.Filters
{
    /// <summary>
    /// Defines the logic for equality filter
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public class EqualFilter<T> : Filter, IMultiValueFilter<T>
    {
        /// <summary>
        /// Available values to check for equality
        /// </summary>
        private ObservableCollection<T> _values = new ObservableCollection<T>();

        /// <summary>
        /// Initializes a new instance of the <see cref="EqualFilter&lt;T&gt;"/> class.
        /// </summary>
        /// <param name="propertyInfo">The property info.</param>
        public EqualFilter(PropertyInfo propertyInfo)
            : base(propertyInfo)
        {
            if (propertyInfo.PropertyType != typeof(T))
            {
                throw new ArgumentException("Invalid property type, the return type is not matching the class generic type");
            }
            _values.CollectionChanged += delegate { RaiseFilteringChanged(); };
        }

        /// <summary>
        /// Gets the values to check for equality
        /// </summary>
        /// <value>The values.</value>
        public IList<T> Values
        {
            get { return _values; }
        }

        /// <summary>
        /// Determines whether the specified target is a match.
        /// </summary>
        /// <param name="target">The target.</param>
        /// <returns>
        /// 	<c>true</c> if the specified target is a match; otherwise, <c>false</c>.
        /// </returns>
        public override bool IsMatch(object target)
        {
            if (target == null)
            {
                return false;
            }
            T value = (T)PropertyInfo.GetValue(target, null);

            return _values.Contains(value);
        }
    }
}

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This article, along with any associated source code and files, is licensed under The Eclipse Public License 1.0

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About the Author

Stefan Bocutiu
Software Developer (Senior) Lab49
United Kingdom United Kingdom
No Biography provided

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