codebehind best practices


I've got a set of 3 aspx pages that all follow a certain template.  They all contain a repeater, dropdownlist and 4 navigation buttons.  I'm using the same codebhind for all 3 pages to handle click events and bind the data in the Page_Load.  However, on some pages, I need aditional coding in the Page_Load.  If I explicitly include a Page_Load in a <script runat="server"></script> block on this page, it overrides the Page_Load that is contained in the codebhind, so I'm forced to duplicate the Page_Load code in the codebehind and add the extra code required for this specific page...  What can I do to prevent duplicating the data?  Also, is it possible to have multiple files for the codebehind?  Keep in mind I want to follow best practices...


Who is Participating?
mmarinovConnect With a Mentor Commented:
What i suggested is to use user control only for the specific need
in your case you can have only on aspx page with several user controls
 - for sign up
 - for support
 - for my account

then all the main funtionality will be in the aspx file and the special functionality will be in the user controls

AerosSagaConnect With a Mentor Commented:
First off you should never have an inline page_load event and one in the codebehind, can't believe it let you do that and secondly if you want to share methods functions across multiple pages you should make a seperate class to contain these public methods or functions.  just right click on the project and hit new item, then you will see class listed.  Put all your shared functions/methods in it and call them as needed from your pages.  I do this all the time with image resizers, shipping modules, credit card gateways etc.  If you need any more help let me know.


Hi trevorhartman,

first of all it is best to use only one file - not 3
one of the best practise is not to duplicate - code, controls - if you can modify them
so in your case you can use only one page and fr the aditional coding to use user control

the aditional coding will be in the page_load of the page ( aspx file ), and the page_load of the user control is executed after the page_load of the aspx file is finished

Get expert help—faster!

Need expert help—fast? Use the Help Bell for personalized assistance getting answers to your important questions.

trevorhartmanAuthor Commented:

Thanks for the tip.  Is there any way to avoid duplicating the code int he page load?  I'll show you what i'm doing.  Here is the generic Page_Load that I'm using for all three pages:

            if (!IsPostBack)
                  ProductTypes.DataSource = CCMTEES.Products.GetAllCategories();
                  ClientList.DataSource = CCMTEES.Client.GetCcmteesClients();

then, for another page, I have to also include the following in my page load:

            // populate the countries
            billCountry.DataSource = CCMTEES.ShoppingCart.GetCountryCodes();
            shipCountry.DataSource = CCMTEES.ShoppingCart.GetCountryCodes();
            // set the default selected value to US
            billCountry.Items.FindByValue("US").Selected = true;
            shipCountry.Items.FindByValue("US").Selected = true;

now, do I just have to duplicate the code into multiple Page_Loads in seperate classes, or is there a better way?


You would recommend making my entire page a user control?  Here is my content template:

If you click on the buttons you can see that the other pages look the same and just have different content in the center section.  What do you think?

Thanks - Trevor
trevorhartmanAuthor Commented:
Ok... I see.  I have studied a little on user controls but never actually made one.  With user controls, can you encapsulate what would normally be inside a page_load inside the usercontrol instead?  Like:



void BindMyData(object sender, EventArgs e)
  //bind some data..


If so, this would be a great solution.

agreed classes are for operations, your rendering controls which is definately a job for .ascx !  
Yes Trevor - this is the scenario and the solution

trevorhartmanAuthor Commented:
excellent.  time to research ascx... thanks guys

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.