Hi Mike,
I performed a test on your sample code and did see the problem. My
suggestion is to paint the cell value in the DataGridViewTextBoxCell by
yourself. To do this, handle the CellPaint event of the DataGridView. For
example:
void dataGridView1_CellPainting(object sender,
DataGridViewCellPaintingEventArgs e)
{
if (e.ColumnIndex == 0)
{
e.PaintBackground(e.ClipBounds, true);
using (SolidBrush sb = new
SolidBrush(e.CellStyle.ForeColor))
{
e.Graphics.DrawString(e.FormattedValue.ToString(),
e.CellStyle.Font, sb, e.CellBounds);
}
e.Handled = true;
}
}
To reuse the above code, a way is to create a new type
DataGridViewTextBoxCell which paints its cell value with wrapping. To do
this, we need to create a custom column that contains the new type cell.
The following is a sample:
public class MyTextBoxColumn : DataGridViewColumn
{
public MyTextBoxColumn()
: base(new MyTextBoxCell())
{
}
public override DataGridViewCell CellTemplate
{
get
{
return base.CellTemplate;
}
set
{
if (value != null &&
!value.GetType().IsAssignableFrom(typeof(MyTextBoxCell)))
{
throw new InvalidCastException("Must be a
MyTextBoxCell");
}
base.CellTemplate = value;
}
}
}
public class MyTextBoxCell : DataGridViewTextBoxCell
{
protected override void Paint(Graphics graphics, Rectangle
clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates
cellState, object value, object formattedValue, string errorText,
DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle
advancedBorderStyle, DataGridViewPaintParts paintParts)
{
base.Paint(graphics, clipBounds, cellBounds, rowIndex,
cellState, value, formattedValue, errorText, cellStyle,
advancedBorderStyle, paintParts);
using (SolidBrush backcolorBrush = new
SolidBrush(cellStyle.BackColor))
{
graphics.FillRectangle(backcolorBrush, new
Rectangle(cellBounds.X + 1, cellBounds.Y + 1, cellBounds.Width - 2,
cellBounds.Height - 2));
}
using (SolidBrush highlightBrush = new
SolidBrush(SystemColors.Highlight))
if ((cellState & DataGridViewElementStates.Selected) ==
DataGridViewElementStates.Selected)
{
graphics.FillRectangle(highlightBrush, new
Rectangle(cellBounds.X + 1, cellBounds.Y + 1, cellBounds.Width - 2,
cellBounds.Height - 2));
}
using (SolidBrush forecolorBrush = new
SolidBrush(cellStyle.ForeColor))
{
graphics.DrawString(formattedValue.ToString(),
cellStyle.Font, forecolorBrush, cellBounds);
}
}
}
Add the instances of the MyTextBoxColumn class into your DataGridView
instead of the standard DataGridViewTextBoxColumn.
Hope this helps.
If you have any question, please feel free to let me know.
Sincerely,
Linda Liu
Microsoft Online Community Support
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