Question

Can I call javascript function from MVC controller action (not from view page) and get return value? How?

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I need to make request to server from code (.cs) using javascript like here (but this is aspx page)

function getInitData() { 
var code; code = 'return {' ;
code += 'me: API.getProfiles({uids: API.getVariable({key: 1280}), fields: "photo"})[0]'; 
code += '};'
VK.Api.call('execute', { 'code': code }, onGetInitData); 
} 

Answer 1

You can call a controller action from a JavaScript function but not vice-versa. How would the server know which client to target? The server simply responds to requests.

An example of calling a controller action from JavaScript (using the jQuery JavaScript library) in the response sent to the client.

$.ajax({
           type: "POST",
           url: "/Controller/Action", // the URL of the controller action method
           data: null, // optional data
           success: function(result) {
                // do something with result
           },                
           error : function(req, status, error) {
                // do something with error   
           }
       });