Project Description Fast WPF datagrid control designed to work with large datasets, with mandatory data virtualization.

Update 2025-02-27 - the project now targets .NET8

This repository is a fork of https://fastwpfgrid.codeplex.com/

• fast DataGrid control for .NET - WPF
• designed for large data sets
• both columns and rows are defined in model
• uses MVVM design pattern, but (for performance reasons) does not use classic WPF binding
• works only with data virtualization (UI virtualization is not needed as in other WPF datagrid controls)
• for rendering WriteableBitmapEx library is used

Features

• Fast scrolling and rendering
• Excel-like mouse-drag selecting
• Hide columns/rows
• Frozen columns/rows
• Own rendering, WPF templates are not used. Supported objects - text (with italic, bold attributes), images, image buttons

Model implementation

Grid control is bind to model, which controls displayed data. Below is example of model implementation. Refer to the test WPF app for further details.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using FastWpfGrid;

namespace FastWpfGridTest
{
    public class GridModel1 : FastGridModelBase
    {
        private Dictionary<Tuple<int, int>, string> _editedCells = new Dictionary<Tuple<int, int>, string>();
        private static string[]()() _columnBasicNames = new[]()() { "", "Value:", "Long column value:" };

        public override int ColumnCount
        {
            get { return 100; }
        }

        public override int RowCount
        {
            get { return 1000; }
        }

        public override string GetCellText(int row, int column)
        {
            var key = Tuple.Create(row, column);
            if (_editedCells.ContainsKey(key)) return _editedCells[key](key);


            return String.Format("{0}{1},{2}", _columnBasicNames[column % _columnBasicNames.Length](column-%-_columnBasicNames.Length), row + 1, column + 1);
        }

        public override void SetCellText(int row, int column, string value)
        {
            var key = Tuple.Create(row, column);
            _editedCells[key](key) = value;
        }

        public override IFastGridCell GetGridHeader(IFastGridView view)
        {
            var impl = new FastGridCellImpl();
            var btn = impl.AddImageBlock(view.IsTransposed ? "/Images/flip_horizontal_small.png" : "/Images/flip_vertical_small.png");
            btn.CommandParameter = FastWpfGrid.FastGridControl.ToggleTransposedCommand;
            btn.ToolTip = "Swap rows and columns";
            return impl;
        }
    }
}