Error when subscribing to webservice from asp.net

[E11esar]

Hi there.
I have written an asp.net / c# web application that subscribes to a web service and all works fine.
If I then enclose the page functionality of the web page within AJAX tab and accordion controls, I am then receiving an error of the type:
-----------------------------------------------------------------------------
Server Error in '/ClientApp' Application.
--------------------------------------------------------------------------------
The request failed with HTTP status 404: Not Found.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Net.WebException: The request failed with HTTP status 404: Not Found.
--------------------------------------------------------------------------------------------

Is there anything additional I need to do in order to make the same functionality work from within AJAX controls please?

Thank you.

M :)

[Curtis Rutland]

I think that you need to add this decoration to the webservice:

[System.Web.Script.Services.ScriptService]

When I create a new web service I see this:

.
.
.
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// 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 WebService : System.Web.Services.WebService {
.
.
.

So if you have control over your service, you should do that. Of course, I think that this requires Framework 3.5.

[Frinavale]

It would help if you showed us how you were calling the web service.
Are you calling it client side or server side?

[E11esar]

Thank you for the help.

I have the webservice using the attribute and an example of the web service is as follows (cut down for readability):

using System.Configuration;
using System.Data;
using System.Web.Services;
using System.Data.OracleClient;
[WebService(Namespace = "http://localhost/AddSearch/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// 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 Service : WebService
{
    public Service () {
        //Uncomment the following line if using designed components 
        //InitializeComponent(); 
    }
//LLPG Extract Address
    [WebMethod(Description = "Return address details based on eleven parameters (int, string x 10)")]
    public DataSet LLPG_EXTRACT_ADDRESS(string p1Uprn, int p2Usrn, string p3Saon, string p4Paon, string p5StreetDescriptor, string p6LocalityName, string p7PostTown, string p8CountyName, string p9PostCode, string p10LastUpdateFrom, string p11LastUpdateTo)
    {
        OracleConnection conn = GetConn();
        conn.Open();
        OracleCommand sComm = new OracleCommand("LLPG_EXTRACT_ADDRESS", conn);
        sComm.CommandType = CommandType.StoredProcedure;
        sComm.Parameters.Add("p_uprn", OracleType.Char).Value = p1Uprn;
        sComm.Parameters.Add("p_usrn", OracleType.Number).Value = p2Usrn;
        sComm.Parameters.Add("p_saon", OracleType.Char).Value = p3Saon;
        sComm.Parameters.Add("p_paon", OracleType.Char).Value = p4Paon;
        sComm.Parameters.Add("p_street_desc", OracleType.Char).Value = p5StreetDescriptor;
        sComm.Parameters.Add("p_locality_name", OracleType.Char).Value = p6LocalityName;
        sComm.Parameters.Add("p_posttown", OracleType.Char).Value = p7PostTown;
        sComm.Parameters.Add("p_county_name", OracleType.Char).Value = p8CountyName;
        sComm.Parameters.Add("p_postcode", OracleType.Char).Value = p9PostCode;
        sComm.Parameters.Add("p_last_upd_from", OracleType.Char).Value = p10LastUpdateFrom;
        sComm.Parameters.Add("p_last_upd_to", OracleType.Char).Value = p11LastUpdateTo;
        sComm.Parameters.Add("p_result", OracleType.Cursor).Direction = ParameterDirection.Output;
        OracleDataAdapter dataAdapter = new OracleDataAdapter(sComm);
        DataSet addDataSet = new DataSet();
        dataAdapter.Fill(addDataSet);
        return addDataSet;
    }
 

The code that calls this web service, from the web application is as follows:

 
protected void btnExtract_Click(object sender, EventArgs e)
    {
        TextBox p1 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtUPRN");
        TextBox p2 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtUSRN");
        TextBox p3 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtSAON");
        TextBox p4 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtPAON");
        TextBox p5 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtStreetDescriptor");
        TextBox p6 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtLocalityName");
        TextBox p7 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtPostTown");
        TextBox p8 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtCountyName");
        TextBox p9 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtPostCode2");
        TextBox p10 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtLastUpdateFrom");
        TextBox p11 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtLastUpdateTo");
        //TextBox p12 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtCrossReference");
        //TextBox p13 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtOldCrossReference");
        //TextBox p14 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtSource");
        DropDownList list = (DropDownList)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("lbExtractType");
        string extractType = list.SelectedItem.Value;
        GridView gridView1 = (GridView)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane2").FindControl("GridView1");
        switch (extractType)
        {
            case ("LLPG_EXTRACT_ADDRESS"):
                gridView1.DataSource = myService.LLPG_EXTRACT_ADDRESS(p1.Text.ToUpper(), Convert.ToInt32(p2.Text), p3.Text.ToUpper(), p4.Text.ToUpper(), p5.Text.ToUpper(), p6.Text.ToUpper(), p7.Text.ToUpper(), p8.Text.ToUpper(), p9.Text.ToUpper(), p10.Text.ToUpper(), p11.Text.ToUpper());
                break;
            case ("LLPG_EXTRACT_LPI"):
                gridView1.DataSource = myService.LLPG_EXTRACT_BLPU(p1.Text.ToUpper(), Convert.ToInt32(p2.Text), p3.Text.ToUpper(), p4.Text.ToUpper(), p5.Text.ToUpper(), p6.Text.ToUpper(), p7.Text.ToUpper(), p8.Text.ToUpper(), p9.Text.ToUpper(), p10.Text.ToUpper(), p11.Text.ToUpper());
                break;
            case ("LLPG_EXTRACT_BLPU"):
                gridView1.DataSource = myService.LLPG_EXTRACT_LPG(p1.Text.ToUpper(), Convert.ToInt32(p2.Text), p3.Text.ToUpper(), p4.Text.ToUpper(), p5.Text.ToUpper(), p6.Text.ToUpper(), p7.Text.ToUpper(), p8.Text.ToUpper(), p9.Text.ToUpper(), p10.Text.ToUpper(), p11.Text.ToUpper());
                break;
            case ("LLPG_EXTRACT_NSG"):
                gridView1.DataSource = myService.LLPG_EXTRACT_LPI(p1.Text.ToUpper(), Convert.ToInt32(p2.Text), p3.Text.ToUpper(), p4.Text.ToUpper(), p5.Text.ToUpper(), p6.Text.ToUpper(), p7.Text.ToUpper(), p8.Text.ToUpper(), p9.Text.ToUpper(), p10.Text.ToUpper(), p11.Text.ToUpper());
                break;
            case ("LLPG_EXTRACT_STREET"):
                gridView1.DataSource = myService.LLPG_EXTRACT_NSG(p1.Text.ToUpper(), Convert.ToInt32(p2.Text), p3.Text.ToUpper(), p4.Text.ToUpper(), p5.Text.ToUpper(), p6.Text.ToUpper(), p7.Text.ToUpper(), p8.Text.ToUpper(), p9.Text.ToUpper(), p10.Text.ToUpper(), p11.Text.ToUpper());
                break;
            case ("LLPG_EXTRACT_LPG"):
                gridView1.DataSource = myService.LLPG_EXTRACT_STREET(p1.Text.ToUpper(), Convert.ToInt32(p2.Text), p3.Text.ToUpper(), p4.Text.ToUpper(), p5.Text.ToUpper(), p6.Text.ToUpper(), p7.Text.ToUpper(), p8.Text.ToUpper(), p9.Text.ToUpper(), p10.Text.ToUpper(), p11.Text.ToUpper());
                break;
        }
        gridView1.DataBind();
    }
 
 

I have had to use the FindControl()'s due to the AJAX tab and accordion controls.

Hopefully this will make some obvious sense..?

I have published both the webservice and associated test web site (client), placed them in IIS and tried running from there and also ensured the web reference for the client is correct.

Still I get the 404 error message.

Thank you.

M :)

[Frinavale]

@E11esar
The error is not obvious looking over your code.
This is going to sound like dumb question but here it goes: did you update the web service reference in your ASP.NET application to make sure that it references the web service once it's been published to IIS?

[E11esar]

Hi there.

Yes I have checked that one and the web reference is okay.

It is a strange one as everything works okay outside of AJAX.

Thank you.

Mark :)

[Frinavale]

I cannot reproduce your error.
Here's what I've tried so far...

I created a Web Service:

Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.ComponentModel
 
' To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
' <System.Web.Script.Services.ScriptService()> _
<System.Web.Services.WebService(Namespace:="http://tempuri.org/")> _
<System.Web.Services.WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<ToolboxItem(False)> _
Public Class Service1
    Inherits System.Web.Services.WebService
 
    <WebMethod()> _
    Public Function Greeting(ByVal person As String) As String
        Return "Hello " + person + "!"
    End Function
 
End Class

And then created an ASPX page that contains a Tab control.

I placed a TextBox (to grab the name), a button (to execute the Web Service), and a label (to display the message retrieved from the Web Service) in the first Tab in the Tab Control.

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Test.aspx.vb" Inherits="ScratchPad.Test" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc2" %>
<%@ Register Assembly="ScratchPad" Namespace="ScratchPad" TagPrefix="cc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
  <form id="form1" runat="server" defaultbutton="Button2">
 
    <asp:ScriptManager ID="scManager" runat="server"></asp:ScriptManager>
    <cc2:TabContainer ID="TabContainer1" runat="server" >
    <cc2:TabPanel ID="fistTab" HeaderText="Page1" runat="server">
    <ContentTemplate>
        <asp:panel ID="GreetingSection" runat="server">
            <asp:TextBox ID="personsName" runat="server"></asp:TextBox>
            <asp:Button ID="showGreeting" runat="server" text="Greet"/><br />
            <asp:Label ID="greeting" runat="server"></asp:Label>
        </asp:panel>
    </ContentTemplate>
  </cc2:TabPanel>
  <cc2:TabPanel ID="secondTab" HeaderText="Page2" runat="server">
    <ContentTemplate>
      page 2
    </ContentTemplate>
  </cc2:TabPanel>
</cc2:TabContainer>
</form>
</body>
</html>  
 

Here is the code for when user clicks the button. I am successfully able to call my Web Service, retrieve the greeting and display it in the label:

Private Sub showGreeting_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles showGreeting.Click
        Dim proxy As New localhost.Service1
        greeting.Text = proxy.Greeting(personsName.Text)
End Sub
 

[E11esar]

Hi there and thank you for trying that. I have even tried decorating my Web Methods with an additional [ScriptMethod] but that also has not helped.

Certainly a strange one.

Thank you.

M :)

[Frinavale]

Why are you having problems directly referring to your web controls (eg TextBoxes)?

[E11esar]

Again I don't know why. If I don't use the FindControl() then I receive context error messages saying the respective TextBox cannot be seen/found.

I have had this in the past and it seems to be a 50-50 situation with this happening.

Thank you.

Mark

[Frinavale]

What is the name of the file that has the TextBoxes and other controls you're using?

What is the name of the file that has the code that calls the web service application?

What is the name of the file that has your Tab and Accordion controls?

[E11esar]

@Frinavale
Default.aspx
Default.aspx.cs
Default.aspx again

There is only one web form and that is Default.aspx.

Thank you.

Mark :)

[E11esar]

Also it may be worth noting that the aspx page is within a Master page.

Thank you.

M :o)

[Frinavale]

I don't know why you have to use the FindControl() method.
Your controls should belong to the Default.aspx page and the Ajax tools should have no effect on that.

The following code:

TextBox p1 = (TextBox)Master.FindControl("ContentPlaceHolder1").FindControl("TabContainer1").FindControl("TabPanel2").FindControl("Accordion1").FindControl("AccordionPane1").FindControl("txtUPRN");

Makes me think that you are calling your Web Service from your MasterPage, not from your Default.aspx code.

I'm starting to think that your 404 error is not the result of calling a web service but has something to do with why you need to use the FindControl() method like you are. You should not have to do this.

I'm going to add an accordion to the code I posted above to see if that makes a difference in another attempt to reproduce the problem you're encountering.

[Frinavale]

Ok I've added an Accordion control to the Tab control.
The Accordion control has a Textbox, Button, Label in one of it's panes. The button click event calls the Web Service to retrieve a greeting for the name of the person entered in the TextBox and displays the message in the label.

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Test.aspx.vb" Inherits="ScratchPad.Test" %>
 
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc2" %>
<%@ Register Assembly="ScratchPad" Namespace="ScratchPad" TagPrefix="cc1" %>
 
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server" defaultbutton="Button2">
    <asp:ScriptManager ID="scManager" runat="server"></asp:ScriptManager>
 
    <cc2:TabContainer ID="TabContainer1" runat="server" >
        <cc2:TabPanel ID="fistTab" HeaderText="Page1" runat="server">
            <ContentTemplate>
 
                   <asp:panel ID="GreetingSection" runat="server">
                      <asp:TextBox ID="personsName" runat="server"></asp:TextBox>
                      <asp:Button ID="showGreeting" runat="server" text="Greet"/><br />
                      <asp:Label ID="greeting" runat="server"></asp:Label>
                   </asp:panel>     
 
 
            </ContentTemplate>
        </cc2:TabPanel>
        <cc2:TabPanel ID="secondTab" HeaderText="Page2" runat="server">
            <ContentTemplate>
                    <cc2:Accordion ID="Accordion1" runat="server">
                       <Panes>
                           <cc2:AccordionPane ID="AccordionPane1" runat="server">
                            <Header>Pane 1</Header>
                            <Content>
                                 <asp:panel ID="GreetingSection2" runat="server">
                                          <asp:TextBox ID="personsName2" runat="server"></asp:TextBox>
                                          <asp:Button ID="showGreeting2" runat="server" text="Greet"/><br />
                                          <asp:Label ID="greeting2" runat="server"></asp:Label>
                                 </asp:panel>   
                            </Content>
                           </cc2:AccordionPane>
                           <cc2:AccordionPane ID="AccordionPane2" runat="server">
                            <Header>Pane 2</Header>
                            <Content>Content for Accordion 2</Content>
                           </cc2:AccordionPane>
                       </Panes>
                     </cc2:Accordion>
            </ContentTemplate>
        </cc2:TabPanel>
    </cc2:TabContainer>
 
   </form>
 
</body>
</html>
 

I was able to access my controls perfectly fine in the Button Click event code:

    Private Sub showGreeting_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles showGreeting.Click
        Dim proxy As New localhost.Service1
        greeting.Text = proxy.Greeting(personsName.Text)
    End Sub
 
    Private Sub showGreeting2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles showGreeting2.Click
        Dim proxy As New localhost.Service1
        greeting2.Text = proxy.Greeting(personsName2.Text)
    End Sub

The only thing that I noticed is that I had to submit the request twice before the Accordion control would display the message. I don't know why but it did display the message quickly before it reverted back to not showing it....?

But that's not the problem you're facing.
I don't have a clue why you can't access your controls normally.

If you find the cause to this I think you'll find the cause to your 404 error.

[E11esar]

Hi again and thank you for all your help here.

I must admit it all looks so confusing in what I am doing and I must have made some sort of error when creating this project.

Within the Master.master page is no c# code save for the default code created by visual studio. In the html view of the master file is just a header and logo, so nothing much there.

All the functionality is within the Default.aspx and Default.aspx.cs files.

Maybe my VS2008 installation is corrupt..? This is a company laptop so I can only "assume" all was loaded okay.

What I'll do is to copy in your project files into this version of VS2008 and see if I encounter any problems.

Thank you.

Mark :)

[Frinavale]

@E11esar
Sounds good.
I would recommend creating a new test project and first trying with just the tab control...then try the Accordion example (because this one wasn't working 100% to my liking).

Let me know what you find.

-Frinny

[E11esar]

I tried to copy in the source code and straight away the WebService has fallen over with the following error:

Error 1 Could not create type 'Service'. C:\00 Development\Test Case\WebServiceTest\Service.asmx 1 
 

As an aside, with my own project, if I view the project in Design view then I can only see the controls for Tab-1 and not for those in Tab-2, maybe that is pointing at a possible problem and hence the requirement for me to use the FindControl() methods..?

Thank you.

M :)

[Frinavale]

@E11esar
Where is that error occurring? On the web service instance or in the aspx page code?

@E11esar
I never work in Design View so I had to check this out for myself. Apparently I can only see the controls for Tab1 as well. I don't think this is your problem.

What type of project did you create? A web site or a web application?

I created a MasterPage and copied my aspx code into it a Content Page that uses the MasterPage. I had no problems accessing controls in this aspx page either.