When to use Javascript Validation in C#

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I need information that when to use Javascript validation and server side validation .Is there any rules defined or is there any books which clarifies above.

Posted 7-Aug-14 21:35pm

sp_suresh

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4 solutions

Solution 1

When you have any validations on your web page, Then Java script is highly appreciated. As it is working from client side, the speed of validations will be much faster when comparing to server side validations. But ensure that you are not validating any confidential data's in javascript, I mean in client side.
Server side is good for database and huge data population validations in web page.

Please refer this link[^]

Happy Coding :)

Posted 7-Aug-14 21:47pm

SRK90

Solution 4

Please go through the following link,
http://stackoverflow.com/questions/162159/javascript-client-side-vs-server-side-validation[^]

As a programmer you must do the validation both in client side and server side. In that you can avoid some % of errors you may face.

Posted 8-Aug-14 1:54am

Sibeesh Venu

Solution 2

Hi,

You book on ASP.Net validation :http://msdn.microsoft.com/en-us/library/ms972961.aspx[^]

Look javascript validation can easily be by pass but server side is not so put very low level validations in Javascript and High Level validation in Server side

Low Level Validation : Data Type check, Exists Check etc
High Level Validation : Dependency Check,Value check using your business logic etc

Posted 7-Aug-14 21:50pm

Suvabrata Roy

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sp_suresh 11-Aug-14 0:27am

thanks ...

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Sergey Alexandrovich Kryukov · Accepted Answer · 2014-08-07T21:51:00

There are no rules. It depends on how important the validation is. Validation in JavaScript can be faster, because it comes without any HTTP requests which heavily depend on traffic. For JavaScript, it just does not matter.

As to the importance, this is more serious. JavaScript can be 1) switched off by the user, 2) eavesdropped or forged with some malware. Server validation is free from this problem (unless the server host is infected, which is no so likely :-)): even though the HTTP request can be forged, it cannot harm anything on the server, because server-side validation can filter out any signs of malicious activity, and, say, just silently ignore malicious request.

I personally experienced some attack, very trivial yet very harmful (could easily turn your server host into a zombie distributing spam), which I very reliably blocked by server-side validation. This is such an important case, that every Web developer should understand it. Please see my past post on the topic: unable to send mail , it showing the error in below code .[^].

—SA