Datagridview Validating Event Handler

Overwriting the value of a datagridview cell on validating, seems impossible, all the ways you can get to the value of the cell tell you they are Read-Only, the key is the EditingControl Property:

 private void dataGridView1_CellValidating(object sender, DataGridViewCellValidatingEventArgs e) {

  DataGridViewCell cell =

dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex];

  if (cell.IsInEditMode)

  {

    Control c = dataGridView1.EditingControl;

    c.Text = CleanInputNumber(c.Text);

  }

}