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I want to use a Javascript variable in C#, is it possible, how do I go about it? Thanks

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    Please be more specific. What do you want to do exactly? Commented May 24, 2011 at 11:15
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    This is a bit like saying I want to read vinyl with a CD player. Commented May 24, 2011 at 11:18
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    I want to check the value of a JS variable (after some client side validations), after server trip on page load, so that based on that value I can perform some actions. Commented May 24, 2011 at 11:18
  • @Andreas Zoltan: You probably mean laserdisc player, or have you ever seen a 5" vinyl? Commented May 24, 2011 at 11:23
  • @takrl - hmmmm - laserdisc + vinyl - I think it's got legs you know. Commented May 24, 2011 at 11:39

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best way is to write that variable to a cookie, and read from C#.

but you can also use:

  • send that variable asynchronously
  • send that variable as part of a POST
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I believe you would be interested in the value held by the variable and to make it available to the C# code as you suggest it needs to be posted to the server.

So you can assign the value to a Hidden Field which you can retrieve at the server end and use the value

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Use asp.net hidden field and update the value on client side using JS. Then you can easily access that field on server side since it would be a server control

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