How to convert an Object List into JSON in ASP.NET

Question

I have a list of person objects which I want to send in response to a jquery' ajax request. I want to send the list into JSON format. The list is as follows -

List<Person> PersonList = new List<Person>();

Person X = new Person("X", 23, "This is X");
Person Y = new Person("Y", 24, "This is Y");

PersonList.Add(X);
PersonList.Add(Y);

How can I convert this PersonList list into JSON ?

Daniel Lee · Accepted Answer · 2010-03-20 11:09:01Z

3

JSON.NET has worked really well for me. http://www.codeplex.com/Json

And if you are doing Web Forms and JQuery then this link might help you out:

http://encosia.com/2008/03/27/using-jquery-to-consume-aspnet-json-web-services/

answered Mar 20, 2010 at 11:09

Daniel Lee

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3 Comments

MD Sayem Ahmed Over a year ago

I tried using JSON.NET's "JsonConvert.SerializeObject(PersonList)" method. But when I send ajax request using jquery's "$.getJSON(...)" method, it causes an "Invalid JSON" error, which I checked using Firebug.

Daniel Lee Over a year ago

Using Web Forms with JQuery's ajax functionality is a bit tricky that's why I included the encosia link. getJSON is a shorthand function for the ajax method but getJSON does not work with Web Forms you must use the $.ajax() method. Also you must set the encoding correctly and the type must be Post and watch out for the .d security measure that ASP.NET uses to protect against an XSS attack. See this article: encosia.com/2009/06/29/never-worry-about-asp-net-ajaxs-d-again

Christopher Over a year ago

Just downloaded Json.NET with nuget. Had it working in minutes. It's awesome!

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