title: ASP.Net GridView - Show the last 4 digits
body: <p>In my gridview, I have a column that I need everything masked but the last 4-digits. 
  This is my GridView:</p>
  
  <pre><code>&lt;asp:GridView ID="GridView" runat="server" AutoGenerateColumns="False" BorderStyle="None" BorderWidth="1px" CellPadding="3" DataKeyNames="br_id" DataSourceID="SqlDataSource6"&gt;
                  &lt;Columns&gt;
                      &lt;asp:BoundField DataField="AccountNumber" HeaderText="Account Number" SortExpression="AccountNumber" /&gt;
                  &lt;/Columns&gt;
  &lt;/asp:GridView&gt;
  </code></pre>
  
  <p>I tried the Right function of SQL Server in my SQLDataSource, </p>
  
  <pre><code>`SELECT '****-****-****' + RIGHT (AccountNumber, 4)` FROM....
  </code></pre>
  
  <p>the issue then is, when I hit edit, and save in my GridView, it will save this in the database, for example: ****-****-****-1234</p>