sample6.aspx

<h2>User Information</h2>
    <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:DefaultConnection %>" 
        SelectCommand="SELECT UserId, UserName, Comments FROM [Users]" 
        UpdateCommand="UPDATE [Users] SET [UserName] = @UserName, [Comments] = @Comments WHERE [UserId] = @UserId">
        <DeleteParameters>
            <asp:Parameter Name="UserId" Type="Object" />
        </DeleteParameters>
        <UpdateParameters>
            <asp:Parameter Name="UserId" Type="Object" />
            <asp:Parameter Name="UserName" Type="String" />
            <asp:Parameter Name="Comments" Type="String" />
        </UpdateParameters>
    </asp:SqlDataSource>

    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="UserId" DataSourceID="SqlDataSource1">
        <Columns>
            <asp:CommandField ShowEditButton="True" />
            <asp:BoundField DataField="UserName" HeaderText="UserName" SortExpression="UserName" />
            <asp:BoundField DataField="Comments" HeaderText="Comments" SortExpression="Comments" />
        </Columns>
    </asp:GridView>