Create event for button in data grid

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C#

ASP.NET

Hey guys I am using a datagrid and i want to code for the button inside the grideview...

this is the ASP.NET code

  <asp:DataGrid ID="dgrdapprovereject" runat="server" AllowPaging="True"
                                                               DataKeyField="ID" CssClass="vutblrow" TabIndex="6"
   AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None"  Width="100%"  PagerStyle-Mode="NumericPages"
                                                             >
    <PagerStyle CssClass="pgr" Mode="NumericPages" Height="25px" BorderStyle="Solid" NextPageText="Next" PageButtonCount="20" PrevPageText="Last" />
                                                        <AlternatingItemStyle CssClass="vutblaltrow" />
 <HeaderStyle CssClass="vutblhdr" />
  <ItemStyle CssClass="vutblitemrow" />

<Columns>

<asp:ButtonColumn HeaderText="Submit" ButtonType="LinkButton" Text="Submit" >
</asp:ButtonColumn>
</Columns>
</Datagrid>

I really dont know how to create an event for the submit button inside my datagrid.Pls help :(