DataGridViewProgressCell.cs

namespace Morpheusweb.Controls
{
 public class DataGridViewProgressCell : DataGridViewImageCell
 
  private float _maxValue = 100
  private Color _fillingColor = Color.FromArgb(21, 232, 30)
  private bool _drawText
  public bool DrawTex
  {
   get { return _drawText; }
   set { _drawText = value; }
  }
  public Color FillingColor
  {
   get { return _fillingColor; }
   set { _fillingColor = value; }
  }
  public float MaxValue
  {
   get { return _maxValue; }
   set { _maxValue = value; }
  }
  private static Image emptyImage;
  static DataGridViewProgressCell()
  {
   emptyImage = new Bitmap(1, 1,
         System.Drawing.Imaging.PixelFormat.Format32bppArgb);
  }
  public DataGridViewProgressCell()
  {
   ValueType = typeof (int);
  }
  public override sealed Type ValueType
  {
   get { return base.ValueType; }
   set { base.ValueType = value; }
  }
  protected override object GetFormattedValue(object value,
             int rowIndex, ref DataGridViewCellStyle cellStyle,
             TypeConverter valueTypeConverter,
             TypeConverter formattedValueTypeConverter,
             DataGridViewDataErrorContexts context)
  {
   return emptyImage;
  }
  protected override void Paint(Graphics g, Rectangle clipBounds,
             Rectangle cellBounds,
             int rowIndex, DataGridViewElementStates cellState,
             object value, object formattedValue, string errorText,
             DataGridViewCellStyle cellStyle,
             DataGridViewAdvancedBorderStyle advancedBorderStyle,
             DataGridViewPaintParts paintParts)
  {
   [...]
  }
 }
}

DataGridViewProgressColumn.cs

namespace Morpheusweb.Controls
{
 public class DataGridViewProgressColumn : DataGridViewImageColumn
 {
  float _maxValue;
  Color _fillingColor = Color.Green;
  bool _drawText;
  public bool DrawText
  {
   get { return _drawText; }
   set { _drawText = value; }
  }
  public Color FillingColor
  {
   get { return _fillingColor; }
   set { _fillingColor = value; }
  }
  public float MaxValue
  {
   get { return _maxValue; }
   set { _maxValue = value; }
  }
  public DataGridViewProgressColumn()
  {
   CellTemplate = new DataGridViewProgressCell();
   ((DataGridViewProgressCell)CellTemplate).FillingColor = _fillingColor;
   ((DataGridViewProgressCell)CellTemplate).MaxValue = _maxValue;
   ((DataGridViewProgressCell)CellTemplate).DrawText = _drawText;
  }
  public override sealed DataGridViewCell CellTemplate
  {
   get { return base.CellTemplate; }
   set { base.CellTemplate = value; }
  }
 }
}

Infine usiamo le classi come nell'esempio in basso:

Occorre creare una colonna di tipo DataGridViewProgressColumn e valorizzarne i dati.

//inizializzazione:
DataGridViewProgressColumn col = new DataGridViewProgressColumn();
col.Name = "Progress";
col.HeaderText = "";
col.Width = 360;
grdDati.Columns.Add(col);

//progress:
DataGridViewProgressCell progressCell = (Row.Cells["Progress"] as DataGridViewProgressCell);
progressCell.MaxValue = 10
for (int i = 1; i <= 10; i++)
{
 progressCell.Value = i;
}