Problem with Webservice Error Web Service Method is not valid

Question

Hi!
I ve got a Problem with a Webservice. I ve Scripted it in VB.net -- Please has anybody an Idea
why this happens -- I can't find the Problem
Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.ComponentModel
Imports System.Web.Configuration
Imports System.Web.Management
Imports System.Data.SqlClient.SqlDataReader
Imports System.Data.SqlClient
Imports System.Management
<System.Web.Services.WebService(Namespace:="SPECIALMDT.Service1")> _
<System.Web.Services.WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<ToolboxItem(False)> _
Public Class Service1
    Inherits System.Web.Services.WebService
#Region "Instance variables"
    Private _rootServer As String = ""
    Private _slpServer As String = ""
    Private _ConnectionString As String = ""
#End Region
#Region "Initialization"
    Public Sub New()
        ' Read the root server parameter
        Me._rootServer = WebConfigurationManager.AppSettings.Item("RootServer")
        Trace.WriteLine(("MyMDTWebService: Specified root server is " & Me._rootServer))
        Me._slpServer = WebConfigurationManager.AppSettings.Item("SLPServer")
        Trace.WriteLine(("MyMDTWebService: Specified SLP server is " & Me._slpServer))
        ' Get Connection String from web.config
        Me._ConnectionString = ConfigurationManager.ConnectionStrings("MDTDB").ConnectionString
        Trace.WriteLine(("MyMDTWebService: Connection String is " & Me._ConnectionString))
    End Sub
#End Region
    Public Function RetrieveSCCMPKG() As List(Of Names)
        Using connection = New SqlConnection(_ConnectionString)
            connection.Open()
            Dim command = New SqlCommand("RetrieveSCCMPKG", connection)
            command.CommandType = CommandType.StoredProcedure
            Using dr = command.ExecuteReader()
                Dim result = New List(Of Names)()
                While dr.Read()
                    result.Add(New Names() With { _
                     .PkgId = DirectCast(dr("PkgId"), String), _
                     .Name = DirectCast(dr("Name"), String) _
                    })
                End While
                Return result
            End Using
        End Using
    End Function
End Class
Public Class Names
    Public Property PkgId() As String
        Get
            Return m_PkgId
        End Get
        Set(ByVal value As String)
            m_PkgId = value
        End Set
    End Property
    Private m_PkgId As String
    Public Property Name() As String
        Get
            Return m_Name
        End Get
        Set(ByVal value As String)
            m_Name = value
        End Set
    End Property
    Private m_Name As String
#Region "Utilities"
#End Region
End Class
My web.Config looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <configSections>
    <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
      <section name="Koster.MDT.My.MySettings" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    </sectionGroup>
  </configSections>
  <appSettings>
    <add key="RootServer" value="MySCCMServer" />
    <add key="SLPServer" value="MySCCMServer" />
    <add key="RootSiteCode" value="AT1" />
    <add key="ADDomain" value="MyDomain" />
    <add key="ADUsername" value="" />
    <add key="ADPassword" value="" />
    <add key="MDTDBServer" value="MySCCMServer" />
    <add key="MDTDBName" value="mdt_at1" />
    <add key="MDTDBIntegratedSecurity" value="True" />
    <add key="MDTDBUser" value="YourMDTDBAdminAccount" />
    <add key="MDTDBPassword" value="YourMDTDBAdminAccountPw" />
    <add key="IncludeFunctions" value="*" />
    <add key="ExcludeFunctions" value="" />
    <add key="IncludeADFunctions" value="" />
    <add key="ExcludeADFunctions" value="DeleteComputer,DeleteComputerForced,SetComputerAttribute,DeleteUser,DeleteUserForced,SetUserAttribute" />
    <add key="IncludeSCCMFunctions" value="" />
    <add key="ExcludeSCCMFunctions" value="DeleteComputer,DeleteComputerByID" />
    <add key="IncludeMDTFunctions" value="" />
    <add key="ExcludeMDTFunctions" value="" />
    <add key="IncludeSMSCliCtrFunctions" value="" />
    <add key="ExcludeSMSCliCtrFunctions" value="" />
    <add key="IncludeSpecialMDT" value="RetrieveSCCMPKG" />
  </appSettings>
  <connectionStrings>
	  <add name="MDTDB" connectionString="Data Source=MySCCMServer;Initial Catalog=mdt_at1;Integrated Security=SSPI;"/>
  </connectionStrings>
  <system.web>
    <!-- 
            Set compilation debug="true" to insert debugging 
            symbols into the compiled page. Because this 
            affects performance, set this value to true only 
            during development.
            Visual Basic options:
            Set strict="true" to disallow all data type conversions 
            where data loss can occur. 
            Set explicit="true" to force declaration of all variables.
        -->
    <compilation strict="false" explicit="true" />
    <pages>
      <namespaces>
        <clear />
        <add namespace="System" />
        <add namespace="System.Collections" />
        <add namespace="System.Collections.Specialized" />
        <add namespace="System.Configuration" />
        <add namespace="System.Text" />
        <add namespace="System.Text.RegularExpressions" />
        <add namespace="System.Web" />
        <add namespace="System.Web.Caching" />
        <add namespace="System.Web.SessionState" />
        <add namespace="System.Web.Security" />
        <add namespace="System.Web.Profile" />
        <add namespace="System.Web.UI" />
        <add namespace="System.Web.UI.WebControls" />
        <add namespace="System.Web.UI.WebControls.WebParts" />
        <add namespace="System.Web.UI.HtmlControls" />
		<add namespace="System.Data.SqlClient.SqlDataReader" />
		<add namespace="System.Data.SqlClient" />
		<add namespace="System.Management" />
		<add namespace="System.Data.SqlClient" />
		<add namespace="System.Web.Services" />
		<add namespace="System.ComponentModel" />
		<add namespace="System.Web.Configuration" />
		<add namespace="System.Web.Management" />
		<add namespace="System.Web.Services.Protocols" />
		</namespaces>
    </pages>
    <!--
            The <authentication> section enables configuration 
            of the security authentication mode used by 
            ASP.NET to identify an incoming user. 
        -->
    <authentication mode="Windows" />
    <!--
            The <customErrors> section enables configuration 
            of what to do if/when an unhandled error occurs 
            during the execution of a request. Specifically, 
            it enables developers to configure html error pages 
            to be displayed in place of a error stack trace. -->
    <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
      <error statusCode="403" redirect="NoAccess.htm" />
      <error statusCode="404" redirect="FileNotFound.htm" />
    </customErrors>
    <webServices>
      <protocols>
        <add name="HttpPost" />
        <add name="HttpGet" />
        <add name="Documentation" />
      </protocols>
      <wsdlHelpGenerator href="MKWsdlHelpGenerator.aspx" />
    </webServices>
  </system.web>
  <system.diagnostics>
    <trace autoflush="true" indentsize="4">
      <listeners>
        <add name="TraceListener" type="System.Diagnostics.TextWriterTraceListener" initializeData="C:\Temp\MyMDTTrace.log"/>
      </listeners>
    </trace>
  </system.diagnostics>
</configuration>
Now when I Call this Webservice with my *.asmx File I get the following Error
System.InvalidOperationException: RetrieveSCCMPKG Web Service method name is not valid.
   at System.Web.Services.Protocols.HttpServerProtocol.Initialize()
   at System.Web.Services.Protocols.ServerProtocol.SetContext(Type type, HttpContext context, HttpRequest request, HttpResponse response)
   at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing)
I have Changed the Webservice and also the Webconfig but I don't know what setting is false
Can anybody who had this Problem help me
Thx for your Answers in Advance
MichaelF2050

Answer 1

Have you tried debugging the service?

Is that the full exception? Was there an InnerException?

Have you tried narrowing the problem down? Remove code from the service until it works. For instance, what happens if your code only contained:

Dim result = New List(Of Names)()
Return result

---

John Saunders
WCF is Web Services. They are not two separate things.
Use WCF for All New Web Service Development, instead of legacy ASMX or obsolete WSE
Use File->New Project to create Web Service Projects