CascadingDropDown returns [Method Error 12031] after upgrade to 1.0 Beta

After upgrading from the July CTP to 1.0 Beta all my CascadingDropDown's have stoped working. I only get [Method error 12031] in return an all of them. I hade the same problem when implementing them the first time but I then found the answer in thread 1393072 and referenced threads. This time however I am not able to find anything that helps me. I have tried to migrate my July CTP projekt to a new empty 1.0 Beta project but it doesn't help. Have anyone else hade the same problem?

I am grateful for any suggestions and tips!!

Have you made sure to decorate your service class with this attribute?

[Microsoft.Web.Script.Services.ScriptService()]
public class MyService : WebService
{
...
}

Thanks allot!

Now i works just fine. One can wonder why that line isn't in the walkthrough for CascadingDropDown!

Thanks a lot for that! That's been bugging me all morning. Although I didn't have [Method Error 12031], I had [Method Error 500], this solution still worked for me. It really should be in the walkthrough
I Agree! This should be added RIGHT AWAY!!!

Hey Guys,

Actually there is some documentation and I'll point you to where I found most of my upgrade info. Garbin's recent post on his blog has three links to some very vital information.

http://aspadvice.com/blogs/garbin/archive/2006/10/20/MS-AJAX-v1.0-Beta-and-Ajax-Control-Toolkit-released_2100_.aspx

The CTP-to-Beta whitepaper is where I found the not for adding the ScriptService attribute.

Hope this helps.

The method error 12030 still appears for me when I use the CTP and the specified attribute.

Regards

Vinit

Did you change the return type of your methods that populate your drop downs to return an array of AjaxControlToolkit.CascadingDropDownNameValue objects?

All web methods for child drop downs must have a signature that conforms to the following:

[WebMethod]
public AjaxControlToolkit.CascadingDropDownNameValue[] GetDataForMyChildDropDown(string knownCategoryValues, string category)

You can find this in the CTP-to-Beta whitepaper I believe.

Hiya.

Had the same problem and finally found out why. None of the other things suggested worked. Thanks to Steve Clements for that one... http://geekswithblogs.net/steveclements/archive/2006/10/23/94893.aspx

The web service class either needs

[Microsoft.Web.Script.Services.ScriptService]

or

using Microsoft.Web.Script.Services;

namespace Clm.Web.Services

{

[ScriptService]

publicclassFoo

Your most welcome :)

Steve

Same problem, but using only pagemethods...

What changes do I need to get it working?

Can you post some code?
http://forums.asp.net/thread/1486194.aspx

Hi,

I've run into the same error. However, when I change the line in the webservice.vb file from:

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

to:

<Microsoft.Web.Script.Serices.ScriptService ()
I get the error 'Type Microsoft.Web.Script.Serices.ScriptService' is not defined'

The whole "snippet":

<WebService(Namespace:="http://tempuri.org/")> _
<WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
<System.Web.Script.Services.ScriptService()> _
Public Class CarsService
Inherits System.Web.Services.WebService

Shared _DocumentAs XmlDocument
Shared _lockAs New Object

I'd appreciate any suggestions.
Thanks!