Read JSON object in Controller

Question

I have the following JQuery code;

var selectedval = $("#PaymentApplication_System").val();
var text = $("#btnSave").val();
var payVal = $("#PaymentApplication_Amount").val();
var dbobj = [{ param: text, value: payVal}];
var jlist = $.toJSON(dbobj);

which gives me the following json object;

[{"param":"Update Payment","value":"50.00"}]

I am using MVC 2. how do I read the values from the object in my controller???

score 2 · Answer 1 · answered Mar 25 '11 at 13:25

MVC 2 does not automatically convert your JSON string to a C# object. You can use the JavaScriptSerializer which is located in System.Web.Script.Serialization. Example:

public ActionResult Index(string customerJson)
{
    var serializer = new JavaScriptSerializer();
    var customer = serializer.Deserialize<Customer>(customerJson);

    return View(customer);
}

This would do pretty good as an extension metod (or put it in a base controller if you have any):

public static class ControllerExtensions
{
    public T JsonDeserialize<T>(this Controller instance, string json)
    {
        var serializer = new JavaScriptSerializer();
        return serializer.Deserialize<T>(json);
    }
}

You can then use it as:

public ActionResult Index(string customerJson)
{
    var customer = this.JsonDeserialize<Customer>(customerJson);

    return View(customer);
}

FYI MVC3 does include a JsonValueProviderFactory that automatically deals with this. — murki, Mar 25 '11 at 17:26
@murki Yep, i know. This question was for MVC2 which does not deal with this. — alexn, Mar 25 '11 at 17:28

score 1 · Accepted Answer · edited May 23 '17 at 12:11

1

I think this post can help which is having similar problem:

Deserialize JSON Objects in Asp.Net MVC Controller

edited May 23 '17 at 12:11

Community

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answered Mar 25 '11 at 13:26

Prashant Lakhlani

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score 0 · Answer 3 · answered Mar 25 '11 at 13:19

0

MVC 2 does not convert JSON objects to Models while MVC 3 does.

You have to use JSON.net.

answered Mar 25 '11 at 13:19

Aliostad

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Read JSON object in Controller

3 Answers3