Converting JavaScript variable to C#

Question

I have a variable in JavaScript and I want to use it as an index reference in my C# code. How do I convert the JavaScript variable into something C# can use? So far this is what I have..

@{
var selectedStockLocation = @Html.Raw(Json.Decode(document.getElementById("cbLocation " + id).value));

var currentLocation = Model.StockLocationBinData[selectedStockLocation];
}

could you post some more code to see how you want to communicate between View and your controller. @AndreLoker: I think that post is about how to handle it in webforms. — PraveenLearnsEveryday
– PraveenLearnsEveryday, Commented Mar 1, 2012 at 14:31
@PraveenLearnsEveryday right, but the issue is the same - he needs to post the data to the server. — Andre Loker
– Andre Loker, Commented Mar 1, 2012 at 14:38

Daniel A. White · Accepted Answer · 2012-03-01 14:26:42Z

0

You will have to post the value back with either a full POST or an AJAX call.

answered Mar 1, 2012 at 14:26

Daniel A. White

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Community · Accepted Answer · 2017-05-23 10:34:50Z

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You are mixing server and client code there.

You need to use (one of many) methods to post client data back to the controller.

Use jquery to write to a hidden variable in the form is one route, see this answer: Passing a jQuery value to MVC 3 Razor view html helper

edited May 23, 2017 at 10:34

CommunityBot

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answered Mar 1, 2012 at 14:27

jenson-button-event

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Brian Mains · Accepted Answer · 2012-03-01 14:29:00Z

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JavaScript runs well after the server-side code has rendered and completed; you cannot use it while rendering the view.. You can, however, store the value in a hidden field, put this hidden field in a form, and process it during a post operation. Or, send it to the server via an AJAX callback.

answered Mar 1, 2012 at 14:29

Brian Mains

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