Click here to Skip to main content
12,448,192 members (49,026 online)
Click here to Skip to main content

Stats

123.1K views
5.9K downloads
56 bookmarked
Posted

Auto-filter for Microsoft WPF DataGrid

, 29 Jan 2009 Eclipse
Allows auto filtering functionality for DataGrid columns.
WPFGridFilter
PowerCollections
PowerCollections.csproj.user
Properties
Stepi.Collections
bin
Filters
Properties
Stepi.UIFilters
bin
Initializers
Properties
Themes
Test.GridSorting
bin
Debug
Test.GridFilter.vshost.exe
Properties
using System.Collections.Generic;
using System.Reflection;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using Stepi.Collections.Filters;

namespace Stepi.UIFilters
{
    /// <summary>
    /// Defines the string filter view
    /// </summary>
    [TemplatePart(Name = StringFilterView.PART_FilterType, Type = typeof(Selector))]
    [TemplatePart(Name = StringFilterView.PART_InputValue, Type = typeof(TextBox))]
    public class StringFilterView : FilterViewBase<StringFilterPresentationModel>, IFilterView
    {
        internal const string PART_InputValue = "PART_Input";
        internal const string PART_FilterType = "PART_FilterType";

        /// <summary>
        /// Instance of a selector allowing to choose the filtering mode
        /// </summary>
        private Selector _selectorFilterType;

        /// <summary>
        /// instance of the text box allowing you to set the value to look for
        /// </summary>
        private TextBox _inputValue;

        /// <summary>
        /// Initializes a new instance of the <see cref="StringFilterView"/> class.
        /// </summary>
        public StringFilterView()
        {
            DefaultStyleKey = typeof(StringFilterView);
        }

        /// <summary>
        /// Called when the control template is applied to this control
        /// </summary>
        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();

            _selectorFilterType = GetTemplateChild(PART_FilterType) as Selector;
            if (_selectorFilterType != null)
            {
                _selectorFilterType.ItemsSource = GetFilterTypes();
            }

            _inputValue = GetTemplateChild(PART_InputValue) as TextBox;
            ClearBindings();
            InitialiseBindings();
        }

        /// <summary>
        /// Gets the filter types.
        /// </summary>
        /// <returns></returns>
        public IEnumerable<string> GetFilterTypes()
        {
            FieldInfo[] values = typeof(StringFilterMode).GetFields(System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public);
            if (values == null)
            {
                return null;
            }
            List<string> enumValues = new List<string>();
            foreach (FieldInfo value in values)
            {
                enumValues.Add(value.Name);
            }
            return enumValues;
        }

        /// <summary>
        /// Gets or sets the model.
        /// </summary>
        /// <value>The model.</value>
        public override StringFilterPresentationModel Model
        {
            get { return base.Model; }
            set
            {
                if (base.Model != value)
                {
                    ClearBindings();
                    base.Model = value;
                    InitialiseBindings();
                }
            }
        }

        /// <summary>
        /// Initialises the bindings.
        /// </summary>
        private void InitialiseBindings()
        {
            StringFilterPresentationModel model = Model;
            if (model != null)
            {
                if (_inputValue != null)
                {
                    _inputValue.SetBinding(TextBox.TextProperty, CreateBinding(model, "Value"));
                }

                if (_selectorFilterType != null)
                {
                    Binding binding = CreateBinding(model, "FilterMode");
                    binding.Converter = new EnumConverter();
                    _selectorFilterType.SetBinding(Selector.SelectedItemProperty, binding);
                }
            }
        }

        /// <summary>
        /// Creates the binding.
        /// </summary>
        /// <param name="model">The model.</param>
        /// <param name="path">The path.</param>
        /// <returns></returns>
        private static Binding CreateBinding(StringFilterPresentationModel model, string path)
        {
            Binding binding = new Binding();
            binding.Source = model;
            binding.Mode = BindingMode.TwoWay;
            binding.Path = new PropertyPath(path);
            return binding;
        }

        private void ClearBindings()
        {
            //if (_selectorFilterType != null)
            //{
            //    _selectorFilterType.SetBinding(Selector.SelectedItemProperty, new Binding() );
            //}
            //if (_inputValue != null)
            //{
            //    _inputValue.SetBinding(TextBox.TextProperty, null);
            //}
        }
    }
}

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

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

Share

About the Author

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

You may also be interested in...

Pro
Pro
| Advertise | Privacy | Terms of Use | Mobile
Web02 | 2.8.160811.3 | Last Updated 29 Jan 2009
Article Copyright 2009 by Stefan Bocutiu
Everything else Copyright © CodeProject, 1999-2016
Layout: fixed | fluid