Pass JSON object to Web Method

Question

I wanted to shared something I learned today with you all. My question was:

Can you pass a JSON object from JavaScript code to a .NET Page Method? For example:

 var task = { 
 Title: $("#titlenew input", $(newTaskRow)).val(), 
 StartDate: $("#startnew input", $(newTaskRow)).val(), 
 EndDate: $("#endnew input", $(newTaskRow)).val(), 
 EstimatedHours: $("#esthrsnew input", $(newTaskRow)).val(),
 PredecessorsOutlineNumbers: $("#depnew input", $(newTaskRow)).val(),
 OutlineNumber: $("#ordernew", $(newTaskRow)).text()
 };
 PageMethods.AddTask(task, saveNewTaskCompleted, saveNewTaskFailed);

And if you can, what type of .NET object should my web method accept?

I found out that yes, you can pass a JSON object to a Page Method, and it comes across as a Dictionary(Of String, String). So my web method signature looks like this:

<System.Web.Services.WebMethod()> _
Public Shared Sub AddTask(ByVal taskJson As Dictionary(Of String, String))
 Dim oTask As New Task()
 oTask.Title = taskJson("Title")
 ' all other accesses to the JSON object here
End Sub

• Andreas Grech: This is a Q&A site, not a blog.
• artlung: From the FAQ for stackoverflow: "It's also perfectly fine to ask and answer your own programming question, but pretend you're on Jeopardy: phrase it in the form of a question." You've not done this. Maybe rewrite it as question/answer.
• Brandon Montgomery: My bad - should I ask the question and then post the answer separately?
• Mark Brittingham: You shouldn't have done it, perhaps, but I am glad you did...

Answer 1

Checkout this article: http://dotnetslackers.com/columns/ajax/ASPNETAjaxWebService.aspx

Decorate your WebMethod with [GenerateScriptType(typeof(Task))] then in client side you will be able to create task. then pass it as regular object to your server side method.

Answer 2

A detailed answer for a similar question states that combining the JQuery & Json2.stringfy() can be used for sending complex type to Server-Side methods.

And on the Server Side, you will only need to put the required Type in the Method Signature

(ex. foo(MyType obj) { ... } )

How to send JSON object to asp.net web service and process the data there?