Retrieve data into the Labels

Hello, I am a beginner so i just need some guidance from experts. I have a page of appointment which display the details of appointments been made for the designer. I have a Label there which when open up, display the CustomerCode, CustomerName. I have now added few more labels Address(ID:lblCustomerAddress); City(ID:lblCustomerCity); Post Code(ID:lblCustomerPC). so could you please tell me what do i need to do in order to get the these detail of customer.... Below is the code
<TR><TD class="nortxt11" vAlign=top align=left style="width: 35%;">Customer</TD><TD vAlign=top align=left style="width: 65%;"> <asp:Label id="lblCustomerName" runat="server" Font-Bold="True" ></asp:Label> &nbsp;</TD></TR> <TR><TD class="nortxt11" vAlign=top align=left style="width: 35%;">Address</TD><TD vAlign=top align=left style="width: 65%;"> <asp:Label id="lblCustomer ...