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DerekGoodingDerekGooding
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get the basics
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‎SimpleDataGrid.Tests/MSTestSettings.cs‎

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[assembly: Parallelize(Scope = ExecutionScope.MethodLevel)]

‎SimpleDataGrid.Tests/SimpleDataGrid.Tests.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>net9.0</TargetFramework>
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<LangVersion>latest</LangVersion>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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<EnableMSTestRunner>true</EnableMSTestRunner>
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<OutputType>Exe</OutputType>
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<TestingPlatformDotnetTestSupport>true</TestingPlatformDotnetTestSupport>
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<!--
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Displays error on console in addition to the log file. Note that this feature comes with a performance impact.
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For more information, visit https://learn.microsoft.com/dotnet/core/testing/unit-testing-platform-integration-dotnet-test#show-failure-per-test
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-->
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<TestingPlatformShowTestsFailure>true</TestingPlatformShowTestsFailure>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
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<PackageReference Include="Microsoft.Testing.Extensions.CodeCoverage" Version="18.0.4" />
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<PackageReference Include="Microsoft.Testing.Extensions.TrxReport" Version="1.8.5" />
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<PackageReference Include="MSTest" Version="3.10.5" />
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</ItemGroup>
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<ItemGroup>
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<Using Include="Microsoft.VisualStudio.TestTools.UnitTesting" />
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</ItemGroup>
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</Project>

‎SimpleDataGrid.Tests/Test1.cs‎

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namespace SimpleDataGrid.Tests;
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[TestClass]
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public sealed class Test1
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{
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[TestMethod]
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public void TestMethod1()
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{
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}
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}

‎SimpleDataGrid.sln‎

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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SimpleDataGrid", "SimpleDataGrid\SimpleDataGrid.csproj", "{71B53291-75B2-4B5E-91B1-245E611AB4EA}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SimpleDataGrid.Tests", "SimpleDataGrid.Tests\SimpleDataGrid.Tests.csproj", "{6CB54D0C-857F-46FB-8A0D-5719DC0718BA}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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{71B53291-75B2-4B5E-91B1-245E611AB4EA}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{71B53291-75B2-4B5E-91B1-245E611AB4EA}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{71B53291-75B2-4B5E-91B1-245E611AB4EA}.Release|Any CPU.Build.0 = Release|Any CPU
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{6CB54D0C-857F-46FB-8A0D-5719DC0718BA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{6CB54D0C-857F-46FB-8A0D-5719DC0718BA}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{6CB54D0C-857F-46FB-8A0D-5719DC0718BA}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{6CB54D0C-857F-46FB-8A0D-5719DC0718BA}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE

‎SimpleDataGrid/Controls/PageDataGrid.cs‎

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using System.Windows;
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using System.Windows.Controls;
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using SimpleDataGrid.Pagination;
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namespace SimpleDataGrid.Controls;
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public class PagedDataGrid : DataGrid
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{
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public static readonly DependencyProperty PagedSourceProperty =
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DependencyProperty.Register(nameof(PagedSource), typeof(object), typeof(PagedDataGrid),
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new PropertyMetadata(null, OnPagedSourceChanged));
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public object? PagedSource
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{
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get => GetValue(PagedSourceProperty);
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set => SetValue(PagedSourceProperty, value);
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}
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private static void OnPagedSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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if (d is PagedDataGrid grid && e.NewValue is IPagedSource paged)
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{
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grid.ItemsSource = paged.CurrentPageItems;
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}
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}
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}
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public interface IPagedSource
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{
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object CurrentPageItems { get; }
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}

‎SimpleDataGrid/Extensions/DataGridExtensions.cs‎

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SimpleDataGrid.Pagination;
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internal class DataGridExtensions
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{
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}

‎SimpleDataGrid/Filtering/FilterCollection.cs‎

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SimpleDataGrid.Pagination;
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internal class FilterCollection
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{
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}

‎SimpleDataGrid/Filtering/FilterDescriptor.cs‎

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namespace SimpleDataGrid.Filtering;
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public class FilterDescriptor<T>(Func<T, bool> predicate)
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{
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public Func<T, bool> Predicate { get; } = predicate ?? throw new ArgumentNullException(nameof(predicate));
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}

‎SimpleDataGrid/Pagination/PagedCollection.cs‎

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using System.ComponentModel;
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namespace SimpleDataGrid.Pagination;
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public class PagedCollection<T> : INotifyPropertyChanged
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{
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private readonly int _pageSize;
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private int _currentPage;
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private IReadOnlyList<T> _source = Array.Empty<T>();
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private IReadOnlyList<T> _filtered = Array.Empty<T>();
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private Func<T, bool> _filter = _ => true;
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private Func<T, string>? _searchSelector;
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private string? _searchTerm;
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public PagedCollection(int pageSize = 50)
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{
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ArgumentOutOfRangeException.ThrowIfNegativeOrZero(pageSize);
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this._pageSize = pageSize;
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}
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public void SetSource(IReadOnlyList<T> items)
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{
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_source = items ?? throw new ArgumentNullException(nameof(items));
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ApplyFiltering();
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}
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public void SetFilter(Func<T, bool> filter)
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{
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this._filter = filter ?? (_ => true);
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ApplyFiltering();
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}
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public void SetSearch(Func<T, string> selector, string? term)
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{
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_searchSelector = selector;
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_searchTerm = term;
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ApplyFiltering();
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}
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private void ApplyFiltering()
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{
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var query = _source.Where(_filter);
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if (!string.IsNullOrWhiteSpace(_searchTerm) && _searchSelector != null)
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{
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query = query.Where(x =>
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_searchSelector(x)
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?.Contains(_searchTerm, StringComparison.OrdinalIgnoreCase) == true);
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}
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_filtered = query.ToList();
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_currentPage = 0;
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RaiseAllChanged();
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}
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public IReadOnlyList<T> CurrentPageItems =>
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_filtered.Skip(_currentPage * _pageSize).Take(_pageSize).ToList();
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public int CurrentPage => _currentPage + 1;
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public int TotalPages => (int)Math.Ceiling((double)_filtered.Count / _pageSize);
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public bool HasNext => _currentPage < TotalPages - 1;
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public bool HasPrevious => _currentPage > 0;
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public void NextPage()
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{
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if (HasNext)
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{
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_currentPage++;
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OnPropertyChanged(nameof(CurrentPageItems));
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OnPropertyChanged(nameof(CurrentPage));
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OnPropertyChanged(nameof(HasNext));
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OnPropertyChanged(nameof(HasPrevious));
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}
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}
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public void PreviousPage()
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{
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if (HasPrevious)
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{
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_currentPage--;
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OnPropertyChanged(nameof(CurrentPageItems));
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OnPropertyChanged(nameof(CurrentPage));
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OnPropertyChanged(nameof(HasNext));
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OnPropertyChanged(nameof(HasPrevious));
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}
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}
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private void RaiseAllChanged()
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{
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OnPropertyChanged(nameof(CurrentPageItems));
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OnPropertyChanged(nameof(CurrentPage));
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OnPropertyChanged(nameof(TotalPages));
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OnPropertyChanged(nameof(HasNext));
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OnPropertyChanged(nameof(HasPrevious));
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}
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public event PropertyChangedEventHandler? PropertyChanged;
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private void OnPropertyChanged(string name) =>
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
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}

‎SimpleDataGrid/Pagination/PagedCollectionView.cs‎

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SimpleDataGrid.Pagination;
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internal class PagedCollectionView
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{
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}

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