Hello,

I have created a simple webservice in VS 2005.  I added a cascadingdropdownlist extender in an update panel, as well as a single drop down list, and a scriptmanager.  When copy and paste the name of the asmx file including the asmx extension, and paste it into the property of the service path, it comes up saying it cannot find the service, even thought the web service is there.  The codebehind in VB includes a simple webmethod function which returns the datarow values and names for each row specified by the dataset's tableadapter method. 

I tried, adding a new webservice to the root, and that has not worked.

I also made sure the scriptingservice decoration was listed right about the class.

I also have tried closing and reopening Visual studio to no luck,

I have also checked to make sure the webconfig file has the appropriate tags in place as well.

Finally, I have rebuilt the project, however the servicepath attribute still cannot find the webservicefile specified.

Okay, I think showing us some code and markup will make us better able to help you. Are you able to add a Web reference to the Web service, if deployed to IIS, and use it directly within your project?

One common fix is to use a virtual root path (e.g. ~/WebService.asmx), to avoid any trouble caused by the virtual path that projects add locally by default.

Without seeing some code, it's hard to give further advice.

Here is some sample code, "~/" was able to fix the error in not finding the webservice,  However I am now getting a 500 error instead of the results of the dataset.

VS 2005 Professional

The ASP.NET page code

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="SearchDefault.aspx.vb"  EnableEventValidation="false" MasterPageFile="~/masterpages/pubMaster.master" Inherits="DataDetailsTest" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>


<asp:Content ID="cntDetailsViewTest" ContentPlaceHolderID="webformcontent" Runat="Server">
    &nbsp;<br />
    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <asp:UpdatePanel ID="upControlSearch" runat="server">
        <ContentTemplate>
            &nbsp;<asp:Label ID="lblSelIndustry" runat="server" Text="Industry : "></asp:Label>
            <br />
            <br />
            <br />
            <asp:DropDownList ID="ddlIndustry" runat="server">
            </asp:DropDownList><br />
            <br />
            <br />
            <br />
            <cc1:CascadingDropDown ID="cddIndustry" runat="server" Category="Industry" LoadingText="Loading Industries ..."
                PromptText="Select an Industry" ServiceMethod="GetDDIndustries" TargetControlID="ddlIndustry" ServicePath="~/GetReferralService.asmx">
            </cc1:CascadingDropDown>
            &nbsp;&nbsp;&nbsp;&nbsp;<br />
            <br />
            <asp:Label ID="lblSelCompany" runat="server" Text="Category  :"></asp:Label><br />
            <br />
            <br />
            &nbsp;
        </ContentTemplate>
    </asp:UpdatePanel>
    <br />
    &nbsp;<br />
    <br />


</asp:Content>

Codebehind:

Imports System.Web
Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports AjaxControlToolkit
Imports System.Data.SqlClient
Imports System.Data
Imports System.Collections.Generic

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

    <WebMethod()> _
      Public Function GetDDIndustries(ByVal knownIndustryValues As String, ByVal industry As String) As CascadingDropDownNameValue()

        Dim industryAdapter As New dsRefbyIndustryTableAdapters.dsIndustryTableAdapter

        Dim industryValues As New List(Of CascadingDropDownNameValue)()

        For Each Row As DataRow In industryAdapter.GetIndustries
            industryValues.Add(New CascadingDropDownNameValue(Row("Ind_Name").ToString, Row("Ind_IndustryID").ToString))
        Next

        Return industryValues.ToArray
    End Function

 End Class

What's the specific 500 error?  That will give you details about what's going wrong on the server-side.

the specific error is Method Error 500

Make sure you're running in debug mode.  If you look at the content of the 500 error's response, there should be a lot of detail about the error.  It will be the same information as you see on a regular yellow screen error.

That, or just run the site in debug mode through Visual Studio, so you can inspect the server-side error at runtime.

This is the exact error:

[InvalidOperationException: Request format is unrecognized for URL unexpectedly ending in '/GetDDIndustries'

.]

   System.Web.Services.Protocols.WebServiceHandlerFactory.CoreGetHandler(Type type, HttpContext context

, HttpRequest request, HttpResponse response) +405961

   System.Web.Services.Protocols.WebServiceHandlerFactory.GetHandler(HttpContext context, String verb

, String url, String filePath) +212

   System.Web.Script.Services.ScriptHandlerFactory.GetHandler(HttpContext context, String requestType

, String url, String pathTranslated) +47

   System.Web.HttpApplication.MapHttpHandler(HttpContext context, String requestType, VirtualPath path

, String pathTranslated, Boolean useAppConfig) +193

   System.Web.MapHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +93

   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) 

+155

See if this helps: http://aspadvice.com/blogs/ssmith/archive/2007/09/04/FIX-Request-format-is-unrecognized-for-URL-unexpectedly-ending-in.aspx

I tried this solution, and put the recommended code into the config file, but the same error still results in the drop down box, as well as the same specific error, in debug mode.

Which version of ASP.NET is the service running on?

How is it hosted?  IIS 6, IIS 7, the VS web development server?

right now it is running on my local machine, the ASP.net version 2.0.50727, and the IIS is 5.1 on XP Pro.  I run the program through the run button, in order to receive this error.

Do you know whether your site is targeting 2.0 or 3.5?  IIS reports version 2.0.50727 for both (because they both run on the 2.0 CLR).

One problem you could be having is that 3.5 doesn't work on IIS 5.  Does it work if you run it under the Visual Studio development server?

If it's 2.0, make sure you have the ASP.NET AJAX Extensions 1.0 installed and that your web.config has all of these entries in it.

From what I know, I believe I am running on ASP.Net 2.0.  I am using VS Professional 2005, and am not sure if that has the development server, or how to test it on that. 

If you're running Visual Studio 2005, then it should definitely be an ASP.NET 2.0 project.

Have you double checked that the ASP.NET AJAX Extensions are installed and that your web.config has all of the necessary additions?  I wouldn't think you'd get this far without the extensions installed, but you could be missing the HttpHandlers and/or HttpModules section of the web.config and have issues like this.

To test in the development server, go to the "web" tab in your project's properties and select it from the "servers" section in the lower half of that tab.  You can switch between them there anytime you want.