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Auto-filter for Microsoft WPF DataGrid

, 29 Jan 2009 Eclipse
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.ComponentModel;
using System.Reflection;
using Stepi.Collections;
using Stepi.Collections.Filters;

namespace Stepi.UIFilters.Initializers
{
    public class LessOrEqualFilterInitializer : IFilterViewInitializer
    {
        private const string _filterName = "Less or Equal";

        public bool IsApplying(PropertyInfo propertyInfo)
        {
            CheckArgument(propertyInfo);
            return propertyInfo.PropertyType != typeof(string) && typeof(IComparable).IsAssignableFrom(propertyInfo.PropertyType);
        }

        public IFilterView GetFilterView(PropertyInfo propertyInfo, ICollectionView collection)
        {
            if (!IsApplying(propertyInfo))
            {
                throw new ArgumentException("Invalid property type.Expecting a property with a return type of IComparable but not string");
            }

            IFilter filter = GetFilter(propertyInfo);

            CompareFilterView view = new CompareFilterView();
            Type modelType = typeof(CompareFilterPresentationModel<>).MakeGenericType(propertyInfo.PropertyType);
            view.Model = (ICompareFilterPresentationModel)Activator.CreateInstance(modelType, filter, FilterName);
            return view;
        }

        protected virtual string FilterName
        {
            get { return _filterName; }
        }

        protected virtual IFilter GetFilter(PropertyInfo propertyInfo)
        {
            Type filterType = typeof(LessOrEqualFilter<>).MakeGenericType(propertyInfo.PropertyType);
            IFilter filter = (IFilter)Activator.CreateInstance(filterType, propertyInfo);
            return filter;
        }

        private static void CheckArgument(PropertyInfo propertyInfo)
        {
            if (propertyInfo == null)
            {
                throw new ArgumentNullException("propertyInfo");
            }
        }
    }
}

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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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