JSON From ASMX Service

Question

I'm trying to get a VB.NET ASMX web service to return raw JSON (without the .d). I've declared a plethora of attributes but still get XML back. The signature of my method is:

<WebInvoke(BodyStyle:=WebMessageBodyStyle.Bare, RequestFormat:=WebMessageFormat.Json, ResponseFormat:=WebMessageFormat.Json, Method:="GET")>
<WebGet(BodyStyle:=WebMessageBodyStyle.Bare, ResponseFormat:=ResponseFormat.Json)>
<ScriptMethod(UseHttpGet:=True, ResponseFormat:=ResponseFormat.Json)>
<WebMethod()>
Public Function TryLogin(ByVal userName As String, ByVal passwordHash As String) As LoginResult

Am I missing a declaration?

EDIT: I've tried requesting via POST, but I still get XML.

Try this: http://stackoverflow.com/questions/211348/how-to-let-an-asmx-file-output-json — Egor4eg, Jul 12 '11 at 11:31

score 0 · Answer 1 · answered Mar 19 '13 at 16:40

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Add this line, on its own line, two spaces below your Imports statements:

<System.Web.Script.Services.ScriptService()> _

and immediately above the remaining code.

answered Mar 19 '13 at 16:40

bommerts

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Cylon Cat · Answer 2 · 2011-07-12T14:01:09.203

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Try putting <ScriptService> attribute on the class.

edited Jul 12 '11 at 14:01

answered Jul 12 '11 at 11:18

Cylon Cat

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score 0 · Answer 3 · answered Jul 12 '11 at 11:27

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I think your web method needs to return an object type.

answered Jul 12 '11 at 11:27

Mantorok

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score 0 · Answer 4 · answered Jul 12 '11 at 11:34

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Use attribute ScriptService on your web-service class.

answered Jul 12 '11 at 11:34

Sergey Metlov

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JSON From ASMX Service

4 Answers4