Cascadingdropdown Method Error 12031

asp.net 2.0 /3.5,AJAX,SQL Server Articles,examples of .net technologies Home Asp.Net Ajax Gridview JavaScript SQL JQuery OOPS Concepts MVC Interview Questions Trace Mobile Contact Method error 500/12031 in ajax cascadingdropdown extender | AJAX CascadingDropDown - Method Error 500 By: Suresh Dasari Dec cascadingdropdown method error 500 12, 2011 Categories: Errors , General Introduction: Here I will explain how method error 12030 cascadingdropdown to solve the problem "Method error 500/12031 in ajax cascadingdropdown extender" using asp.net. Description: In previous post I explained clearly about Ajax cascading dropdownlist sample. Generally during implementation of cascading dropdonlist we will see our dropdowns shows error like "Method error 500 or Method Error 12031". This error is occurred because of missing following line of code in WebService. [System.Web.Script.Services.ScriptService()] After add above line of code to our web service page code would be like this [WebService(Namespace = "http://tempuri.org/")][WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)][System.Web.Script.Services.ScriptService()]// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. // [System.Web.Script.Services.ScriptService]public class CascadingDropdown : System.Web.Services.WebService{ After add above line of code try to run application it will work for you. Still if you're getting same error try to add ValidateRequest="false" in @Page line of web page like <%@ Page ...... ValidateRequest ="false" %> Happy Coding……… If you enjoyed this post, please support the blog below. It's FREE! Get the latest Asp.net, C#.net, VB.NET, jQuery, Plugins & Code Snippets for FREE by subscribing to our Facebook, Twitter, RSS feed, or by email. Subscribe by RSS Subscribe by Email 9 comments : hemalisachdev said... Hi, I have writen same with all the mention things u say, bt still its gigving error Method Error 500 February 29, 2012 at 9:30 PM hiren said... Still i m getting this error plz give some solution July 9, 2012 at 8:21 AM Anonymous said... tomra tale baal chero November 28, 2012 at 5:50 AM Anonymous said... thank i soo much.. with ur help i solved my problem in just 2min March 7, 2013 at 12:22 PM prashant tyagi said... sir i m geeting error method 500 plz sir so sol

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using CascadingDropDowns linked to a databse as described on http://www.asp.net/AJAX/AjaxControlToolkit/Samples/Walkthrough/CCDWithDB.aspx Unfortunatly, the code contains a little bug, resulting a Method error 12030 or Method error 12031 being displayed in the dropdownlist, instead of the expected http://redhead-it.com/blog/2007/10/method_error_12030_when_using_cascadingdropdown/ data. Because the webservice is being called from (java)script, using ASP.NET AJAX, the http://www.solveerrors.com/forums/30/ajax-control/ajaxcontroltoolkit-cascadingdropdown-and-method-error-12031-215526 enclosing class has to be decorated with the System.Web.Script.Services.ScriptService attibute to make it work. C#: [System.Web.Script.Services.ScriptService()] public class MyWebserviceClass : System.Web.Services.WebService { [WebMethod] public function MyWebServiceFunction() { // function body } } VB: Public Class MyWebserviceClass Inherits System.Web.Services.WebService Public Function MyWebServiceFunction() ' function body End Function End Class Too bad Microsoft method error forgot to mention this in the example! Method error 12002 And when we're at it: Method error 12002 indicates a timeout error, not uncommon when debugging. Method Error 500 This may also occur from time to time. It's the server telling you there's been an Internal Server Error with code 500. You may want to debug the web service you're using when you see this error. This entry was posted in cascadingdropdown method error C#, DotNET, Programming, VB and tagged ajax, error, webservice. Bookmark the permalink. ← Base64 encoder/decoder DotNET → Leave a Reply Cancel reply Your email address will not be published. Required fields are marked * Name * Email * Website Comment Search for: Recent Posts The cast to value type ‘Int32' failed because the materialized value is null. Either the result type's generic parameter or the query must use a nullable type (when databinding to a LINQ query) An unhandled exception of type ‘System.ArgumentException' occurred in UserControlTestContainer.exe Determine where a javascript alert is coming from Windows power configuration Disable weak SSL ciphers on IIS 6 and Windows Server 2003 Recent CommentsElmer on Extracting a substring from a TEXT field in MySQLSerge on Extracting a substring from a TEXT field in MySQLtomclock on HttpContext.Current.Request.UserHostAddress returns ::1Alex on Installing Windows Fundamentals (WinFLP) on Asus Eee PCElmer on Installing Windows Fundamentals (WinFLP) on Asus Eee PCArchives December 2013 November 2013 October 2013 July 2013 May 2013 April 2013 February 2013 January 2013 September 2012 June 2012 September 2011 August 2011 June 2011 November 2010 October 2010 August 2010 July 2010 May 2010 April 2010 March 2010 February 2010 November 2009 October 2009 September 2009 August 2009 June 20

there's not much data in the SQL DB. When I make regular dropdowns, they work fine. Here is the code for the page, the service page, and the Web.config file. If anyone can make a suggestion, I'd be very grateful and willing to try anything. By now, I've looked at every relevant posting I could find online, not just in the ASP.NET forums. I see that many people have experienced this error (and Method error 500, too), and that some people have given up on AJAX cascadingdropdown DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">