How to create a Password column using the DataGridView

If you want to hide the password value in a Visual Studio DataGridView control, you can use the code below.  If a user clicks into the cell to edit the value, then the current value becomes visible.

private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
    if (dataGridView1.Columns[e.ColumnIndex].Name == “passwordDataGridViewTextBoxColumn” && e.Value != null)
    {
        dataGridView1.Rows[e.RowIndex].Tag = e.Value;
        e.Value = new String(‘*’, e.Value.ToString().Length);
    }
}

private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
    if (dataGridView1.CurrentRow.Tag != null)
        e.Control.Text = dataGridView1.CurrentRow.Tag.ToString();
}

I found the example above on this web page, in a non-english language:

http://studentclub.ro/alexandrusavu/archive/2007/10/10/episode-2-datagridview-cell-format-for-password-textbox.aspx