Problems encoding\decoding strings JS <-> C#

Question

I have a problem in JS encoding and then decoding in the C# server. I use javascript encode() function - but when i have special chars like +, the C# has httputility.urldecode() -> and it converts it as if it was SPACE char.

What is the best way to communicate JS encoding and C# decoding?

I have <a href='javascript:foo(escape('hello +'))' />

function foo(data)
{
$.ajax({ url: "http:/....." + data, dataType: 'html', context: document.body
...
...
}

I debugged the server, and I get 'hello++' - it doesnt know which + is which (space or +) Thank you!

Oded · Accepted Answer · 2010-10-12 13:17:02Z

2

Javascript encode does html encoding. Since + is valid in HTML, it does nothing to the +.

However, you are passing this string through the URL - + on a URL means an encoded space.

You need to use the javascript encodeURIComponent if you want the + to be encoded correctly for consumption on the server side:

<a href='javascript:foo(encodeURIComponent('hello +'))' />

You need to understand that HTML encoding and URL encoding are different things.

edited Oct 12, 2010 at 13:17

answered Oct 12, 2010 at 12:23

Oded

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19 Comments

Himberjack Over a year ago

Still not working. The JS passes '+' to the server, but it still decodes the + as ''

Oded Over a year ago

How does it pass the + to the server? You should probably encode the + before passing it in, as in a URL + is the encoding for a space.

Oded Over a year ago

@oshafran - and how do you pass that to the server? Please edit your question and update it with all the details, as answers may get deleted and people don't always read comments on other answers.

Oded Over a year ago

@oshafran - Excellent. Now that I know what we are dealing with, I have also updated my answer.

Himberjack Over a year ago

What about all the other special chars ('@~ etc...)? I wanted to know what is the encoding\decoding relationship between the JS and C# - which means, how do i encode in JS and how to decode in c# in the same algorithm

|

Cody Gray · Accepted Answer · 2011-04-18 05:29:53Z

2

javascript:

escape(string);

C#:

Microsoft.JScript.GlobalObject.unescape(string);

this combination works fine for me.

edited Apr 18, 2011 at 5:29

Cody Gray♦

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answered Apr 18, 2011 at 3:11

Kin

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Comments

Heena · Accepted Answer · 2013-11-14 11:31:00Z

-1

No Need to do encoding in javascript and decoding in c#. Just use 'encodeURIComponent(string)' javascript function and no need to do any changes in c# code.

answered Nov 14, 2013 at 11:31

Heena

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