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 

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.