README.md

Project Description

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

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 is used WriteableBitmapEx library

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

References

FastWPFGrid is used in DbMouse project ( http:///www.jenasoft.com/dbmouse )

Model implementation

Grid control is bind to model, which controls displayed data. Below is example of model implementation.

   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 = newDictionary<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];
   
   
               return String.Format("{0}{1},{2}", _columnBasicNames[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] = 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;
           }
       }
   }