.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
david stephan
Gaurav Pal
Post New Web Links

Cascade dropdown lists [Method Error 12030]

Posted By:      Posted Date: October 12, 2010    Points: 0   Category :ASP.Net

My first try with Ajax, followed step by step an example and i get in my dropdownlists "[Method Error 12030]"

I changed the script manager and used ToolkitScriptManager

 <form id="RegisterForm" runat="server">
        <asp:ToolkitScriptManager ID="MyToolkitScriptManager" runat="server"></asp:ToolkitScriptManager>

The dropdown:

 <asp:Label ID="CitizenshipLabel" runat="server" AssociatedControlID="Citizenship">Select citizenship:</asp:Label>
                                <asp:DropDownList ID="Citizenship" runat="server"></asp:DropDownList>
                                <asp:CascadingDropDown ID="CitizenshipCascade" runat="server" TargetControlID="Citizenship" LoadingText="Retrieving citizenships..."

View Complete Post

More Related Resource Links

Method error 500 on cascading dropdown


Why do I get a method error 500 on this code:

<asp:DropDownList cssclass="textbox" ID="ddlCountry" runat="server" />
<asp:RequiredFieldValidator Display="Dynamic" SetFocusOnError="True" ID="rfvCountry" runat="server" ControlToValidate="ddlCountry" ErrorMessage="*" InitialValue=""/>
<cc1:CascadingDropDown ID="CascadingDropDown1" runat="server" TargetControlID="ddlCountry" Category="Country"
    prompttext="Select country" ServicePath="/LocalCities.asmx" ServiceMethod="GetCountries">

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

    <WebMethod()> _
    Public Function GetCountries(ByVal knownCategoryValues As String, ByVal category As String) As CascadingDropDownNameVa

EXPERT: Method error 500 in dropdown (solution is NOT adding System.Web.Script.Services.ScriptServic


Please only answer if you have read the full question!!

Ok...this thing is driving me crazy!!!!

I keep getting a method error 500 in my dropdown box.

All the posts on the web come with the same solution, but it doesnt work for me!
The code seems SO simple and consists of so few lines....but it just doesnt work!



<asp:DropDownList ID="ddlCountries" runat="server">

<cc1:cascadingdropdown ID="cddCountries" runat="server" Category="Country" Enabled="True" LoadingText="Loading...please wait." PromptText="Choose a country" ServiceMethod="GetCountries" ServicePath="geolocation.asmx"     TargetControlID="ddlCountries"></cc1:cascadingdropdown>

<%@ WebService Language="VB" CodeBehind="~/App_Code/geolocation.vb" %>

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

Cascade dropdown lists in a repeating table (Browser-enabled form)


I am sure similar questions have been asked before...but:

I have a repeating table with 2 DDLs...let's say: state and city

city is currently sourced from web service which takes the value of the state as parameter.

I allow a user to add a new row in the repeating table to select another state ; and thus return related cities on the same row as the state..and so on...

The obvious question is: is that achievable without code-behind?  I have read about people using "current()" but it all seem to apply to the filter data which does not work for browser-enabled form....so should I use Web services at all?

Thanks in advance.


Sys.Net.WebServiceFailedException: The server method '' failed with the following error:



Let's say we have 2 time consuming functions, aaa and aaa1 inside a aspx page.

        public static string aaa(int i)
            return i.ToString();

        public static string aaa1(int i)
            return i.ToString();



        <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true">
        <span id="displayspan"></span>
        <br />
        <input type="button" value=

Jscript error: Object does not support property or method


 Hi, i have little knowledge on javascript but i need to use this code get from somewhere for a jquery to work.

I face this "Jscript runtime error: Object does not support property or method" whenever im trying to run this page.

In my experience, im get this error msg 9 out of 10 times i use javascript in my system.

Im using Microsoft Visual web developer 2008, i wonder if this is related to my problem, i not sure there is anything i need to add as reference or update anything.

But anyway, in short, i just couldn't use javascript code when using this development tool because of this sort of error.

Anyway, it happen that last time i tried use the same type of jquery code in another project and it seems to work well without an error.

But now when im try to use it again in this recent project i created, it come out with this error and i have no idea how to solve it even look through google and this forum.

It doesn't really seems like its the code problem itself although im not sure, because any javascript code just couldn't work.

So below is my code that i need to use.

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js" ></script>
<script type="text/javascript" src=&quo

The remote server returned an error: (405) Method Not Allowed.



{System.Net.WebException: The remote server returned an error: (405) Method Not Allowed.
   at System.Net.WebClient.UploadFile(Uri address, String method, String fileName)
   at System.Net.WebClient.UploadFile(Uri address, String fileName)
   at System.Net.WebClient.UploadFile(String address, String fileName)
   at Test.Page_Load(Object sender, EventArgs e) in c:\Inetpub\wwwroot\WebSite1\Test.aspx.cs:line 35}

Windows application, automated process will run on local user system...
trying to upload a file to website folder. website address:

System.Net.WebClient wc = new WebClient();
wc.UploadFile(website address, "c:/1.pdf");

Getting error from above line.. Am doing something wrong??
I dont want to use ftp or share folder logic..
is there any other way to upload the files to server??

Ajax Cascading drop down method error 500!


Sorry to trouble you all with something that has already been posted a million times but I have tried everything I can and stuck with for about 10 days now. Please help. I have created 2 tables Categories, Subcategories.

Categories table has Category_ID(Primary Key) and "Category" fields. Subcat table has SubcatID(Primary Key, Sub_cat and Category_ID(Foreign Key). Here's the code of the asmx file.

Service methods used in ASPX file ServiceMethod="GetVendors" and ServiceMethod="GetContactsForVendor". Please help me find the source of the method erro 500 and I will be very greatful.

<%@ WebService Language="VB" Class="CascadingDropdown1" %>

Imports System.Web.Script.Services

Imports AjaxControlToolkit

Imports System.Web

Imports System.Web.Services

Imports System.Web.Services.Protocols

Imports System.Collections.Generic

Imports System.Collections.Specialized

Imports System.Data.SqlClient

<ScriptService()> _
Public Class CascadingDropdown1
Inherits System.Web.Services.WebService

<WebMethod()> _
Public Function GetVendors(ByVal knownCategoryValues As String, ByVal category As String) As Cascadi

how do i develop a cascade drop down lists which get the chart names from excel sheets

hi i have to develop a cascade dropdownlist. one of the drop down is used to retrive only excel docs from a specific doc library and and the other drop down to get all the chart names and attach it to the second dropdown list in doc lib item changed event thanks    

PUT method gives error 400 "Bad Request" in WCF REST Service Application

I am trying to learn WCF REST Services through http://blogs.msdn.com/endpoint/archive/2010/01/14/updating-state-in-wcf-webhttp-services.aspx , It's a link of Part 3 of 12 part blog series. Now I am trying the same stuff given in the part 3 with my own Entities and Entity Model instead of what is given in the blog. Here is my full project I am working on .. http://cid-9e3f62c0688824b0.skydrive.live.com/self.aspx/.Public/pronerveEPMS.zip For comparision with the code shown in the Blog I am following, you can download the zip file of the project from the same link given here at starting (At the end of the blog and before comments starts). And here is the method in Program.cs file of console project in my application that raises the exception.....        private static Role UpdateRole(HttpClient hc, Role role1)        {            Console.WriteLine("Updating Role {0} : ",     role1.RoleID);            Console.WriteLine();            string updateURI = "Roles/" + role1.RoleID.ToString();            HttpContent content = HttpContentExtensions.CreateDataContract(role1);            using (HttpResponseMessage response = hc.Put(upd

Gridview Editing with dropdown lists inside

  Hi, Any good  Example for Editable Grid with dropdownlist inside ? Getting some problem in updating the data   Thanks 

AjaxToolkit's CascadingDropDown control is throwing Method Error 404 in Hybrid system environment (

Hi Experts, We have an Asp.net web application, which is deployed in shared hosting environment. On shared hosting environment initial request to this web application is handled by Linux server and then based on the requested page the Linux server is redirecting request to web server on windows OS. Now, in our web application, we have used ajaxToolkit's CascadingDropDown control to populate three levels of categories. In the hybrid system described above, the CascadingDropDown control is throwing Method Error 404. I would appreciate if some body can guide on how to resolve this issue. The sample of code snap shot is mentioned below. ********************************************************************* Aspx file. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ <asp:DropDownList ID="ddlMajorLevelCategory" runat="server" Width="250px" ToolTip="Select Major Level Category" TabIndex="1"                            SkinID="h6BlueArial"> </asp:DropDownList>   <ajaxToolkit:CascadingDropDown ID="ccMajorCategory" runat="server" TargetControlID="ddlMajorLevelCategory" Category="M" PromptText=&qu

Unable to Customize Custom Lists. Sharepoint Error: User cannot be found.

I am not sure what the best way to put/describe my issue . I am unable to customize my custom list. Steps: 1. Login to sharepoint site. 2. Site Actions -> Site Settings 3. Under Site Administration -> Site Libraries and lists 4. Clicked on a custom list.   Error: Error User cannot be found.   Troubleshoot issues with Microsoft SharePoint Foundation. Correlation ID: 4063bf58-9cb7-4204-8cc4-cc2889abffe3 Date and Time: 9/9/2010 5:51:58 PM   I figured this may be an issue with site permissions, so I have went into site permissions and removed and re-added Administrator into Homeowners group.   Thank you in advance.   Howie

Sharepoint 2010: Get error: You do not have permissions to have lists and pages within My Site.

I am using the administrator login for the sharepoint 2010 farm.  I'm able to access My Site.  However, when I click on My content, I'm getting You do not have permissions to have lists and pages within My Site.   Any ideas?   Thanks.

asp.net and dropdown lists

I have an assignment that is way overdue and need some help in setting it up.  It says to have two additional dropdowns that allow selection of a telephone handset and a service plan adn this info comes from an access database.  Three check boxes should allow independent selection of the 3 additional options (which are voicemail, unlimited data, unlimited text) available.  I already tried doing this using but found that I would need to update all the fields in the database after the entries have been made.  Can someone please help me in setting this up?  I don't expect anyone to do it for me, just need some help with how to set it up.  This is from a class last spring and my memory is somewhat boggled.   Frantically frustrated :-(  

Cascading Dropdown Web Method Issue



I am having an intersting issue to which I have found no solution, obviously. I am using a web service to populate a couple cascading drop downs. Evereything looks correct to me but I am getting a [Method Error 500] when I run it all. I have the <System.Web.Script.Services.ScriptService()> added to the web service so that's not the problem. What I have found while playing with it is that if I remove the arguments from the web method (ByVal knownCategoryValues As String, ByVal category As String) then it works. This of course is not helpful as I am trying to populate multiple drop downs. I can find nothing on anyone else having this issue.

I am using .NET 3.5 and Ajax DLL version 3.02... 

Also of note is that I have another website, using the same .NET and Ajax versions and this code is working fine.

I have tried everything I can think of, including my last resort tactic of smashing my face on my keyboard, and nothing is working. I am at a loss. Any help would be appriciated. Thanks.

Drop Downs:

<asp:DropDownList runat="server" ID="ddlPlateType" Width="250px" />

<ajax:CascadingDropDown runat="server" ID="cddPlateType" TargetControlID="ddlPlateType"

Reset button to change the value of dropdown lists



I have 4 dropdown lists adjacent to eachother that are only visible depending on the value of the preceeding dropdown. The dropdowns contain information relating to injuries and the plan is to make the users choose items from the dropdown list to define their injuries.

 - The first dropdown defines what kind of injury (laceration, bruise, break etc...)

 - The second defines where (arm, head, neck, finger)

 - The third defines further detail (left, right, N/A)

 - The last defines further detail again (upper, lower, N/A etc...)

I basically want a reset button that when clicked, resets the value's of these dropdowns to their initalvalue; '{Select}' (as i have a required field validator preventing '{Select'} from being the given value)

can someone please assist. I'd quite like the button to postback so that the change happens and the page refreshes and i need the validations to refresh also.

Alternatively is someone has a better approach feel free to let me know your thoughts. I don't have an current code as I haven't even been able to ge this working yet!

dropdown lists and selected value problem ?




I have dropdown lists within formview edit template


DD1 is binded to a Data table called Country Version  p/k = CountryId of type "Int"





DD2 is binded to Size Table p/k = SizeId of type Int and Foreign key of CountryId


The select Method of DD2 is "GetDatabyCountryID" which accepts selected value of DD1.


The problem is on postback I the DD1 reverts back to defualt settings and does not keep the selections

I made (for example countryId "1" SizeId  "3"


It seems that the Select Method GetDataByCountryId cannot find the SelectedValue of DD1


In the formview objectdatasource I have CountryId and SizeId from another table called profiles.


any advise appreciated







ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend