DataGridViewでセルの値をフォーマットする方法

DataGridViewでセルの値をフォーマットする方法
VB.NET

Private Sub dgv1_CellFormatting(ByVal sender As Object, _
        ByVal e As DataGridViewCellFormattingEventArgs) _
        Handles dgv1.CellFormatting
    Dim dgv As DataGridView = CType(sender, DataGridView)

    If dgv.Columns(e.ColumnIndex).Name = "col1" AndAlso _
            TypeOf e.Value Is String Then
        Dim strA As String = e.Value.ToString()
        e.Value = strA.ToUpper()
        e.FormattingApplied = True
    End If
End Sub

C#

private void dgv1_CellFormatting(object sender,
    DataGridViewCellFormattingEventArgs e)
{
    DataGridView dgv = (DataGridView)sender;

    if (dgv.Columns[e.ColumnIndex].Name == "col1" && e.Value is string)
    {
        string strA = e.Value.ToString();
        e.Value = strA.ToUpper();
        e.FormattingApplied = true;
    }
}