CODEWITHSUNDEEP
c#javascriptasp.net-mvc
icedek
icedek

Reputation: 584

Access C# List inside Javascript

On the server side I create a list 

List<object> data = new List<object>();

for (var j = 0; j < items.Count(); j++) 
{ 
    var temp = groups.Where(customfilter); 
    data.Add(Html.Raw(Json.Encode(temp)));
}

System.Web.Script.Serialization.JavaScriptSerializer serializer = new 
    System.Web.Script.Serialization.JavaScriptSerializer(); 

var serializedData = serializer.Serialize(data);

Inside Javascript the folowing won't work for anything but primitive types.

var localData = @data;

This is the error:

System.Collections.Generic.List`1[System.Object]

What am I missing?

Upvotes: 3

Views: 4330

Answers (2)

mkorman
mkorman

Reputation: 978

I am assuming that the C# code you posted is a Controller action method.

You would need to have your controller method return a JsonResult, and then use a JSON library to deserialize it.

Something like

public class MyController: Controller
{
    public JsonResult MyAction ()
    {
        var data = new List<object>();
        for (var j = 0; j < items.Count(); j++) 
        { 
            var temp = groups.Where(customfilter); 
            data.Add(temp);
        }
        return Json (data, JsonRequestBehavior.AllowGet);
    }
}

Note how you don't need to serialize every item as you add it to the list.

From the client side, you can call your method and deserialize the result to a list. You can do it like this: 

$.ajax ({ url:'/My/MyAction'}).done (function (data) {
    var myList = JSON.parse (data);
});

Edit:

After some testing, I found that you can access the data by doing:

var myList = data;

Not sure why, but "data" is sent directly as an array.

Hope it helps!

Upvotes: 1

Vova Bilyachat
Vova Bilyachat

Reputation: 19504

First of all check this link http://james.newtonking.com/pages/json-net.aspx

Second 

var temp = groups.Where(customfilter).ToList();

If you use where cast it to list or it will be something like Query object *(I dont remember exactly type) Or if you want to select one object try groups.FirstOrDefault

Third 

 data.Add(temp);

Serializer will do his job to convert it.

Upvotes: 0

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