AJAX :: CascadingDropDown Not Calling Web Service?

Nov 6, 2010

I am new to Ajax and i wanted to use the CascadingDropDown to get rid of the postbacks. But somethings wrong and when i debug i am not running any code from the Web Service for some strange reason.

this is my code in the .aspx file:

<asp:ScriptManager ID="ScriptManager1" runat="server">

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2-City

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1 Canada USA
2 London UK

3-Region

Id regionname cityid
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AND

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[Code]....

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[code]...

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May 19, 2010

I have big problem with the CascadingDropDown. I have 60 CDD with one "Child". So on the page are 60 Parents and 60 Childs. When i use FF3.5 everything works fine when he is the only Browser which is connected to IIS

When i use FF3.0 i get Methode ERROR 403 and 500
When i use IE6 i get Methode ERROR 12030 or 403 or 500
When i use Google Chrome no ERROR no content in the List!?
When i use IE8 sometime it works sometime not!?

This errors are not shown on every DropDownList (but on most of them!) I played with the "<jsonSerialization maxJsonLength="50000000" />" in the Web.config which seams to make it work a little bit better.

What can i do to get the CDD working?

I think it is a timing problem. The CDD are not filled in the order i placed them on the page. Local it works better then remote.

Can you help me?

This is my WebService:

[Code]...

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I have the method 500 error problem, I have tried to do a simple reproduction of the problem still the same, if I run the webservice [URL] it returns the values needed ok (5) in xml format, but the dropdown always return error 500 inside, here are the codes (Using VS2008, NF3.5, Windows 7), I have the whole day trying to solve this but I just can't:

[Code]....

[Code]....

[Code]....

[Code]....

'WEBCONFIG

[Code]....

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[URL]

I am using C# and .Net framework 2.0. Web Service code looks like this

[Code]....

And Web Page Default.aspx looks like this -

[Code]....

I don't understand where i am getting wrong.

[WebService(Namespace = "[URL]/")]

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