when do you need ascx files and how would you use them

Question

When building a website  when would it be a good idea to use  ascx files   What exactly is the  ascx and what is it used for   Examples would help a lot thanks

User · Answer

ASCX files are server-side Web application framework designed for Web development to produce dynamic Web pages They like DLL codes but you can use there s TAGS You can write them once and use them in any places in your ASP pages If you have a file named  Controll ascx  then its code will named  Controll ascx cs    You can embed it in a ASP page to use it

User · Answer

We basically use user controls when we have to use similar functionality on different locations of an app  Like we use master pages for consistent look and feel of app   similarly to avoid repeating the same functionality and UI all over the app  we use usercontrols  There might me much more usage too  but I know this one only     For example  let s say your site has 4 levels of users and for each user there are different pages under different directories with different access mechanisms  Say you are requesting address info for all users  then creating address fields like Street  City  State  Zip  etc on each page  That would be a repetitive job  Instead you can create it as an ascx file  ext for user control   and in this control put the necessary UI and business code for add update delete select the address role wise and then simply reference it all required page   So  thought user controls  one can avoid code repetition for each role and UI creation for each role

User · Answer

Ascx-files are called User Controls and are meant for reusability and also for making complex aspx-pages less complex  lift out some part of the page   They could also be beneficial for something called donut caching  that is when you would like to cache a certain part of a page

User · Answer

It s an extension for the User Controls you have in your project      A user control is a kind of composite control that works much like an ASP NET Web page   you can add existing Web server controls and markup to a user control  and define properties and methods for the control  You can then embed them in ASP NET Web pages  where they act as a unit     Simply  if you want to have some functionality that will be used on many pages in your project then you should create a User control or Composite control and use it in your pages  It just helps you to keep the same functionality and code in one place  And it makes it reusable

User · Answer

If you have a block of code html that appears on several pages and is sort of independent of that page  say a block of latest news items   you could copy paste the code to every page   It is however better to put that code in its own block and just include that block on every page that needs it  That  block  is an ascx file

User · Answer

One more use of  ascx files is  they can be used for Partial Page caching in ASP NET pages  What we have to do is to create an ascx file and then move the controls or portion of the page we need to cache into that control  Then add the  OutputCache directive in the ascx control and it will be cached separately from the parent page  It is used when you don t want to cache the whole page but only a specific portion of the page

User · Answer

When you are building a basic asp net website using webcontrols is a good idea when you want to be able to use your controls at more then one location in your website  Separating code from the layout ascx files will be holding the controls that are used to display the layout  the cs files that belong to the ascx files will be holding the code that fills those controls   For some basic understanding of usercontrols you can try this website

[c#] when do you need .ascx files and how would you use them?

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