How to receive a javascript value within a c# ASP.NET block

Question

What I’d like to do is convert a value from within a JSON to Double and apply the String.Format("{0:N}", valor_JSON)); so I’d be converting 1000 -> 1.000.

However, as already answered, it is not possible to do this inside the View, because C# runs on the server side. The solution would be to process all this before returning JSON, or using a Javascript library for this.

Answer 1

This is not possible the way you show it. C# runs on server, and Javascript wheel on the client (browser).

The C# code is used to generate the HTML (or CSS or JS) that will be sent to the browser. Therefore, once the C# code has been executed and has done its job of generating an HTML so that the client can receive it, it will no longer be executed until a new request is made to the server.

I couldn’t understand the purpose of the code, so I can’t tell you what to do. Maybe if you give a context and explain what you want to do, I can give you a solution in code.

It might be interesting for you to read: What is a "stateless protocol", like HTTP?

Answer 2

As far as I know you can only do this by running a Submit for a method within C#. For this you can create a form variable and call the Submit method, passing the values you want by parameter. Example:

var myForm = document.createElement("form");
myForm.action = 'url do seu método no C#';
myForm.method = "post";

//Setando o parâmetro
var input = document.createElement("input");
input.type = "text";
input.value = obj[key];
input.name = key;
myForm.appendChild(input);

//Adiciona o form ao corpo do documento
document.body.appendChild(myForm);
//Envia o formulário
myForm.submit();

Remembering that you can use market frameworks to do this too, such as jQuery, Angularjs and others.