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7.0

Method Error 500 in AJAX cascading dropdownlist

Asked by AidenA in Asynchronous Javascript and XML (AJAX), Programming for ASP.NET, Web Services and WCF

Tags: AJAX ASP Webprogramming

So, I'm getting this method error 500. I can see lots of other people have experienced this but whatever fixes they have come up with don't work or maybe i don't understand. The code i use is below. Any ideas?

The query seems ok and when i execute it, it returns 1 value, so presumably that is fine.

Thanks, Aiden 
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// In my default.aspx page
 
<cc1:CascadingDropDown  ID="CascadingDropDown1" 
                                runat="server" 
                                TargetControlID="ddlQuarter" 
                                Category="Quarter" 
                                PromptText="Please select the Quarter"
                                LoadingText="Please wait..."
                                servicepath="CSATSearchService.asmx"
                                servicemethod="GetCSATData">
                               
        </cc1:CascadingDropDown>
 
<table style="z-index: 112; left: 245px; position: absolute; top: 101px">
            <tr>
                <td style="width: 124px; height: 21px; text-align: right">Quarter:</td>
                <td style="width: 11px; height: 21px"></td>
                <td style="width: 170px; height: 21px">
                    <asp:DropDownList ID="ddlQuarter" runat="server" Width="165px"/>
                </td>
            </tr>
            <tr>
                <td style="width: 124px; text-align: right">Customer:</td>
                <td style="width: 11px"></td>
                <td style="width: 170px">
                    <asp:DropDownList ID="ddlCustomer" runat="server" Width="165px"/>
                </td>
            </tr>
            <tr>
                <td style="width: 124px; text-align: right">Region:</td>
                <td style="width: 11px"></td>
                <td style="width: 170px">
                    <asp:DropDownList ID="ddlRegion" runat="server" Width="165px"/>
                </td>
            </tr>
        </table>
 
// In my webservice.asmx page
 
Imports System.Web
Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports AjaxControlToolkit
Imports System.Data
Imports System.Data.SqlClient
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 CSATSearchService
   Inherits System.Web.Services.WebService
 
   <WebMethod()> _
   Public Function GetCSATData(ByVal knowncategoryvalues As String, ByVal Category As String) As CascadingDropDownNameValue()
 
      'took out shared
 
      Dim quarterAdapter As New CSATSearchTableAdapters.CSAT_DataTableAdapter
      Dim quarterValues As New List(Of CascadingDropDownNameValue)()
 
      For Each row As DataRow In quarterAdapter.GetQuarter
         quarterValues.Add(New CascadingDropDownNameValue(row("Quarter").ToString, row("Customer Name").ToString))
      Next
 
      Return quarterValues.ToArray
 
   End Function
 
End Class
 
// my xsd page. Query appears to run fine and only returns 1 value so can't be an overflow problem
 
<?xml version="1.0" encoding="utf-8"?>
<xs:schema id="CSATSearch" targetNamespace="http://tempuri.org/CSATSearch.xsd" xmlns:mstns="http://tempuri.org/CSATSearch.xsd" xmlns="http://tempuri.org/CSATSearch.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" xmlns:msprop="urn:schemas-microsoft-com:xml-msprop" attributeFormDefault="qualified" elementFormDefault="qualified">
  <xs:annotation>
    <xs:appinfo source="urn:schemas-microsoft-com:xml-msdatasource">
      <DataSource DefaultConnectionIndex="0" FunctionsComponentName="QueriesTableAdapter" Modifier="AutoLayout, AnsiClass, Class, Public" SchemaSerializationMode="IncludeSchema" xmlns="urn:schemas-microsoft-com:xml-msdatasource">
        <Connections>
          <Connection AppSettingsObjectName="Web.config" AppSettingsPropertyName="CSAT DatabaseConnectionString" ConnectionStringObject="" IsAppSettingsProperty="True" Modifier="Assembly" Name="CSAT DatabaseConnectionString (Web.config)" PropertyReference="AppConfig.System.Configuration.ConfigurationManager.0.ConnectionStrings.CSAT DatabaseConnectionString.ConnectionString" Provider="System.Data.OleDb">
          </Connection>
        </Connections>
        <Tables>
          <TableAdapter BaseClass="System.ComponentModel.Component" DataAccessorModifier="AutoLayout, AnsiClass, Class, Public" DataAccessorName="CSAT DataTableAdapter" GeneratorDataComponentClassName="CSAT_DataTableAdapter" Name="CSAT Data" UserDataComponentName="CSAT DataTableAdapter">
            <MainSource>
              <DbSource ConnectionRef="CSAT DatabaseConnectionString (Web.config)" DbObjectName="CSAT Data" DbObjectType="Table" GenerateMethods="Get" GenerateShortCommands="False" GeneratorGetMethodName="GetQuarter" GetMethodModifier="Public" GetMethodName="GetQuarter" QueryType="Rowset" ScalarCallRetval="System.Object, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" UseOptimisticConcurrency="False" UserGetMethodName="GetQuarter" UserSourceName="Fill">
                <SelectCommand>
                  <DbCommand CommandType="Text" ModifiedByUser="True">
                    <CommandText>SELECT DISTINCT Quarter
FROM         [CSAT Data]</CommandText>
                    <Parameters>
                    </Parameters>
                  </DbCommand>
                </SelectCommand>
              </DbSource>
            </MainSource>
            <Mappings>
              <Mapping SourceColumn="Quarter" DataSetColumn="Quarter" />
            </Mappings>
            <Sources>
            </Sources>
          </TableAdapter>
        </Tables>
        <Sources>
        </Sources>
      </DataSource>
    </xs:appinfo>
  </xs:annotation>
  <xs:element name="CSATSearch" msdata:IsDataSet="true" msdata:UseCurrentLocale="true" msprop:Generator_UserDSName="CSATSearch" msprop:Generator_DataSetName="CSATSearch">
    <xs:complexType>
      <xs:choice minOccurs="0" maxOccurs="unbounded">
        <xs:element name="CSAT_x0020_Data" msprop:Generator_UserTableName="CSAT Data" msprop:Generator_RowDeletedName="CSAT_DataRowDeleted" msprop:Generator_TableClassName="CSAT_DataDataTable" msprop:Generator_RowChangedName="CSAT_DataRowChanged" msprop:Generator_RowClassName="CSAT_DataRow" msprop:Generator_RowChangingName="CSAT_DataRowChanging" msprop:Generator_RowEvArgName="CSAT_DataRowChangeEvent" msprop:Generator_RowEvHandlerName="CSAT_DataRowChangeEventHandler" msprop:Generator_TablePropName="CSAT_Data" msprop:Generator_TableVarName="tableCSAT_Data" msprop:Generator_RowDeletingName="CSAT_DataRowDeleting">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="Quarter" msprop:Generator_UserColumnName="Quarter" msprop:Generator_ColumnPropNameInRow="Quarter" msprop:Generator_ColumnVarNameInTable="columnQuarter" msprop:Generator_ColumnPropNameInTable="QuarterColumn" minOccurs="0">
                <xs:simpleType>
                  <xs:restriction base="xs:string">
                    <xs:maxLength value="255" />
                  </xs:restriction>
                </xs:simpleType>
              </xs:element>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:choice>
    </xs:complexType>
  </xs:element>
</xs:schema>
[+][-]05/29/09 08:12 AM, ID: 24503335Accepted Solution

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About this solution

Zones: Asynchronous Javascript and XML (AJAX), Programming for ASP.NET, Web Services and WCF
Tags: AJAX ASP Webprogramming
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Solution Provided By: AidenA
Participating Experts: 1
Solution Grade: A
 
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