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](http://stackoverflow.com/questions/647259/javascript-query-string/647272#647272) by [@CMS](http://stackoverflow.com/users/5445/cms) in another Stack Overflow post. — Daniel Vassallo, Sep 12 '10 at 19:49
This is a good solution. I would give you a checkmark if I could. — Arizona1911, Sep 12 '10 at 20:02

score 1 · Accepted Answer · answered Sep 12 '10 at 19:50

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")

score 0 · Answer 2 · answered Sep 12 '10 at 19:47

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 '10 at 19:47

Tim Green

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score 0 · Answer 3 · answered Sep 12 '10 at 19:50

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 '10 at 19:50

Jason Kleban

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Passing value from C# codebehind to javascript

3 Answers3