gridview de istenilen satırda ki veriyi nasıl silebilirim ?

 
             <asp:TemplateField  HeaderText="Detay"> 
                 <ItemTemplate> 
                         <asp:ImageButton runat="server" ImageUrl="Resim/delete.png" 
                             OnClick="btnSil_Click" ID="btnSil" 
                             CommandArgument='<%# Eval("DataPrimaryKey")  %>' /> 
 							 
                 </ItemTemplate> 
             </asp:TemplateField>

	protected void btnSil_Click(object sender, ImageClickEventArgs e) 
     { 
  
         var tmpID = (sender as ImageButton).CommandArgument; 
         var primaryKey = Convert.ToInt32(tmpID); 
  
         Veritabani.Sil(primaryKey); 
  
         Doldur(); 
     }