This goes in your aspx page.
<pre lang="xml"><asp:GridView ID="SimpleGridView" runat="server" AutoGenerateColumns="False"
AutoGenerateDeleteButton="True" AutoGenerateEditButton="True"
onrowdeleting="SimpleGridView_RowDeleting"
onrowediting="SimpleGridView_RowEditing">
<Columns>
<asp:CommandField />
<asp:TemplateField HeaderText="Company Code"></asp:TemplateField>
<asp:TemplateField HeaderText="Company Name"></asp:TemplateField>
<asp:TemplateField HeaderText="Company Value"></asp:TemplateField>
</Columns>
</asp:GridView>
Here you capture your edit, and deleted events.
protected void SimpleGridView_RowEditing(object sender, GridViewEditEventArgs e)
{
}
protected void SimpleGridView_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
}