CODEWITHSUNDEEP
asp.netjavascriptajaxjsonasp.net-ajax
Brandon Montgomery
Brandon Montgomery

Reputation: 6986

Pass JSON object to Web Method

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

Upvotes: 5

Views: 6874

Answers (2)

Muhammad Omar ElShourbagy
Muhammad Omar ElShourbagy

Reputation: 7068

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?

Upvotes: 0

Kazi Manzur Rashid
Kazi Manzur Rashid

Reputation: 1544

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.

Upvotes: 5

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