Create Custom Columns for the WinForms DataGrid Control
By Dino Esposito, October 01, 2003
WinForm's DataGrid control is powerful, but its default display doesn't provide much utility. You can replace it with a third-party control, of course, but Dino demonstrates how you can use the DataGrid's customization layer to add features like hyperlinked URLs yourself.
Create Custom Columns for the WinForms DataGrid Control
Listing 1 The Edit method
protected override void Edit(CurrencyManager source, int rowNum, Rectangle bounds,
bool isReadOnly, string instantText, bool cellIsVisible)
{
if (_inEdit)
return;
// The Link column is NOT editable but when in edit mode switches
// to hyperlink mode
if (cellIsVisible && !_inAbort)
{
ChangeEditMode(true);
_llControl.SetBounds(bounds.X, bounds.Y, bounds.Width, bounds.Height);
_llControl.Text = GetDisplayText(source, rowNum);
// Define the link area (1 covering the whole string)
_llControl.Links.Clear();
string url = (string) GetColumnValueAtRow(source, rowNum);
_llControl.Links.Add(0, _llControl.Text.Length, url);
_toolTip.SetToolTip(_llControl, url);
_llControl.LinkClicked +=new
LinkLabelLinkClickedEventHandler(_llControl_LinkClicked);
}
else
{
ChangeEditMode(false);
_inAbort = false;
}
return;
}
