Passing value from C# codebehind to javascript

Question

What is the best way to pass a value from C# code to javascript? Currently I am setting an asp.net hidden field in the Page_Load method.

Also if I pass a value using GET like

Response.Redirect("myurl.com/myPage.aspx?id=300");

how can I get the value of id from myPage using javascript?

Is there a nice way to do this in jquery?

To extract the values of the querystring from the URL, you may want to check out this solution by @CMS in another Stack Overflow post. — Daniel Vassallo
– Daniel Vassallo, Commented Sep 12, 2010 at 19:49
This is a good solution. I would give you a checkmark if I could. — Arizona1911
– Arizona1911, Commented Sep 12, 2010 at 20:02

BlueCode · Accepted Answer · 2010-09-12 19:50:24Z

1

function getParameter(name)
{
    name = name.replace(/[[]/,"\[").replace(/[]]/,"\]");
    var results = new RegExp("[\?&]" + name + "=([^&#]*)").exec(window.location.href);

    return (results != null ? results[1] : "");
}

Use the following code to get your parameter: getParameter("id")

answered Sep 12, 2010 at 19:50

BlueCode

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Tim Green · Accepted Answer · 2010-09-12 19:47:13Z

0

If there's one specific variable you want, you can use the document.location property and split out the part after id=

answered Sep 12, 2010 at 19:47

Tim Green

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Comments

Jason Kleban · Accepted Answer · 2010-09-12 19:50:39Z

0

Tim's idea is good. You could also directly insert the values into the javascript with something like var idValue = '<%= SomeProtectedProperty %>'; within your script. That's for if you know it at load time.

answered Sep 12, 2010 at 19:50

Jason Kleban

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