Json.Net object passed to View in ViewData

Question

I have a page in which I've implemented an ajax call to a controller that returns search results that are packaged in a JsonNetResult.

I have a lot of javascript to then deal with the return package, iterating over each item in the results set and outputting to the page.

Now, however, I need to implement the usage of these same methods for a single item that will be known on page load. I'd like to just pass this info to the View in a ViewData dictionary.

However, I don't know how to use Json.Net in this way.

How do I load a Json.Net object into a native json variable on page load, assuming that object has been stuffed into ViewData["DeepLinkedMessage"]?

I started to go down the path of this:

var thisMessage = (from userMessageProduct  .... more linq2sql stuff...);
bool success = (thisMessage.Count() == 0) ? false : true;
var returnPackage = new { success = success, results = thisMessage };
JavaScriptSerializer serializer = new JavaScriptSerializer();
ViewData["DeepLinkedMessage"] = serializer.Serialize(returnPackage);

It worked just fine. But I quickly noticed I'd have to solve the date formatting problems that I'd already solved when I set up the ajax call that returned JsonNetResult. I want to use the exact same methods that I'm using now.

So, I started down this path:

JsonNetResult jsonNetResult = new JsonNetResult();
jsonNetResult.SerializerSettings.Converters.Add(new IsoDateTimeConverter());
jsonNetResult.Data = returnPackage;
ViewData["DeepLinkedMessage"] = jsonNetResult.ToString();

Then, in my view:

<script type="text/javascript">
    deepLinkedMessageId = '<%=ViewData["DeepLinkMessageId"] %>';
    deepLinkedMessageRaw = '<%=ViewData["DeepLinkedMessage"]%>';
</script>

But this is returning this:

<script type="text/javascript">
    deepLinkedMessageId = '1';
    deepLinkedMessageRaw = 'WebUI.Controllers.JsonNetResult';
</script>

While I'm looking for something like this:

<script type="text/javascript">
    deepLinkedMessageId = '1';
    deepLinkedMessageRaw = '{"success":true,"results":[{"UserId":1,"InternalId":"1356935180","FirstName":"Scott","LastName":"Roberson","MessageId":1,"MessageText":"i just love your product!!!", "MessageCreateTime":"\/Date(1295289549930)\/","ProductId":5,"Flavor":"Almonds","ActivePixel":false,"ActiveClass":null,"TileNumber":0}]}';
</script>

Help using Json.Net for this?

Thanks.

Scott · Accepted Answer · 2011-02-24 23:02:00Z

1

Well, I found out from here that I can just do this:

bool success = (thisMessage.Count() == 0) ? false : true;
var returnPackage = new { success = success, results = thisMessage };
ViewData["DeepLinkedMessage"] = JsonConvert.SerializeObject(returnPackage, new IsoDateTimeConverter());

<wipes hands> "problem solved!"

answered Feb 24, 2011 at 23:02

Scott

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Comments

jonezy · Accepted Answer · 2011-02-24 20:37:44Z

0

You should set your view to implement your model explicitely:

Inherits="System.Web.View<YourModelName>"

Then in your view you can do

Model.Property

I just find this easier to isolate where the problem is happening (plus viewdata can be a pain in the ass)

answered Feb 24, 2011 at 20:37

jonezy

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1 Comment

Scott Over a year ago

Well, the whole reason I'm putting it into the ViewData, instead of the Model, is because I'm already using the Inherits for the rest of the page Inherits="System.Web.Mvc.ViewPage <IEnumerable<DomainModel.ViewDataModels.HomePageUser>>"

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