Ajax Beta WebService with Sessions

Hello all, I need help here. I have a little app that requires getting the session within a webservice. I can't seem to access the session object. Here is my little webservice:

[WebMethod (EnableSession =true)]

[ScriptMethod]

publicstaticArrayList getProductsData()

{

return (ArrayList)Session["productsAL"];

}

Here is my call to the service:

[Microsoft.Web.Script.Services.ScriptMethod]

publicstaticint GetProductCount()

{

returnQuickShipService.getProductsCount();

}

I'm getting a compilation error. With this setup I get the error

Error 1 An object reference is required for the nonstatic field, method, or property 'System.Web.Services.WebService.Session.get' C:\Projects\TMR\POSOrdering\POSWWW\App_Code\Retail\QuickShipService.cs 31 27 C:\...\POSWWW\

It compiles if I remove the static keyword from the service, but then the webservice callreturnQuickShipService.getProductsCount(); is invalid.

Thanks f

or

your method is static, try

return (ArrayList)HttpContext.Current.Session["productsAL"];

AJAX based Web service authentication issue

Hi, I have created a webservice for putting overlays on googlemap. I am using scriptmanager to generate java proxy class. Everything works as expected as long as I use localhost in the url e.g.http://localhost/test.aspx orhttp://localhost/map.asmx/js but if I use the actual domain name then it don't work anymore e.g.http://www.test.com/test.aspx orhttp://www.test.com/map.asmx/js. In case of IE7 i get script error 'test is undefined' and in case of Firefox, I get authentication failed. The result is same whether I run it on the server or on the client. I have tried every possible thing that I can think of. Environment is Win 2003 and IIS 6.0. Framework 2.0 is enabled in the web services entensions. I am using windows integrated authentication and anonymous access is also enable. I am new to ajax world and trying hard for last 2 days to solve this problem. Please help me. Thanks a lot

Hi,

Can you directly browse to http://www.test.com/map.asmx/js. and does that download the Script Proxy ?

Also , can you take a look at the IIS Logs to understand the behavior on the server when you browse to the page ?

Go to Start --> Run -->Type in "LogFiles"

In the folder that opens up , go inside W3SVC1.

Take a look at the File exmmddyy.log and paste the lines that havemap.asmx/js. here.

Thanks for quick response. When I directly browse to .../js in IE7, i get 500 internal error whereas in case of Firefox, it prompts to download a file and the contents of the file are: "{"Message":"Authentication failed.","StackTrace":null,"ExceptionType":"System.InvalidOperationException"}".

No such folder "W3SVC1" exists under LogFiles ... only following folders are present there "Cluster, HTTPERR, ShutDown" and in there I am not able to find anything related to my issue.

Please let me know what next I should do? Thanks

Hi,

HttpPost andHttpGet for webservices is disabled by default in ASP.net 2.0

See if you can find the following snippet in your web.config , if it doesnt exist, add it under the <System.Web> Tag

<webServices>
<protocols>
<add name="HttpSoap1.2"/>
<add name="HttpSoap"/>
<add name="HttpPost"/> // uncomment this
<add name="HttpGet"/> // uncomment this
<add name="HttpPostLocalhost"/>
<add name="Documentation"/>
</protocols>
<soapExtensionTypes>
</soapExtensionTypes>
<soapExtensionReflectorTypes>
</soapExtensionReflectorTypes>
<soapExtensionImporterTypes>
</soapExtensionImporterTypes>
<wsdlHelpGenerator href="http://links.10026.com/?link=DefaultWsdlHelpGenerator.aspx"/>
<serviceDescriptionFormatExtensionTypes>
</serviceDescriptionFormatExtensionTypes>
</webServices>

Hope this helps

Read this KB article about Protocols and web services

HOW TO: Limit the Web Services Protocols that a Server Permits

http://support.microsoft.com/?id=815150

Yes, it was not there and I copied it under system.web tag but the issue is still there. There is also an <httpHandles> tag under system.web. I am pasting the lines from my web.config related to ajax. May be it will give further clue. Please let me know if u see something wrong there or what should I do next. Thanks a lot.

--------

<configSections>
<sectionGroupname="system.web.extensions"type="System.Web.Configuration.SystemWebExtensionsSectionGroup,System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,PublicKeyToken=31bf3856ad364e35">
<sectionGroupname="scripting" type="System.Web.Configuration.ScriptingSectionGroup,System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,PublicKeyToken=31bf3856ad364e35">
<sectionname="scriptResourceHandler"type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,PublicKeyToken=31bf3856ad364e35" requirePermission="false"allowDefinition="MachineToApplication" />
<sectionGroup name="webServices"type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,PublicKeyToken=31bf3856ad364e35">
<sectionname="jsonSerialization"type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,PublicKeyToken=31bf3856ad364e35" requirePermission="false"allowDefinition="Everywhere" />
<sectionname="profileService"type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,PublicKeyToken=31bf3856ad364e35" requirePermission="false"allowDefinition="MachineToApplication" />

<section name="authenticationService"type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,PublicKeyToken=31bf3856ad364e35" requirePermission="false"allowDefinition="MachineToApplication" />
</sectionGroup>
</sectionGroup>
</sectionGroup>
<sectionGroup name="applicationSettings"type="System.Configuration.ApplicationSettingsGroup, System,Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
<section name="wwwroot.Properties.Settings"type="System.Configuration.ClientSettingsSection, System,Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"requirePermission="false" />
</sectionGroup>
</configSections>

<system.web>

<httpHandlers>
<remove verb="*" path="*.asmx" />
<add verb="*" path="*.asmx" validate="false"type="System.Web.Script.Services.ScriptHandlerFactory,System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,PublicKeyToken=31bf3856ad364e35" />
<add verb="*"path="*_AppService.axd" validate="false"type="System.Web.Script.Services.ScriptHandlerFactory,System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,PublicKeyToken=31bf3856ad364e35" />
<addverb="GET,HEAD" path="ScriptResource.axd"type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions,Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"validate="false" />

</system.web>

<system.webServer>
<validation validateIntegratedModeConfiguration="false" />
<modules>
<add name="ScriptModule" preCondition="integratedMode"type="System.Web.Handlers.ScriptModule, System.Web.Extensions,Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
</modules>
<handlers>
<remove name="WebServiceHandlerFactory-ISAPI-2.0" />
<add name="ScriptHandlerFactory" verb="*" path="*.asmx"preCondition="integratedMode"type="System.Web.Script.Services.ScriptHandlerFactory,System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,PublicKeyToken=31bf3856ad364e35" />
<addname="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd"preCondition="integratedMode"type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
<add name="ScriptResource" preCondition="integratedMode"verb="GET,HEAD" path="ScriptResource.axd"type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
</handlers>
</system.webServer>

----------------

I have found the iis logfiles and the directory 'W3SVC1' ... this directory is present in another partition because of setting different path for logging from IIS console.

Below are the lines related to this webservice:

this is the line when called with the following url : http://localhost/WebServices/WSGoogleMaps.asmx

2007-02-22 17:06:54 127.0.0.1 GET /webservices/wsgooglemaps.asmx/js - 80 - 127.0.0.1 Mozilla/5.0+(Windows;+U;+Windows+NT+5.2;+en-US;+rv:1.8.1.1)+Gecko/20061204+Firefox/2.0.0.1 200 0 0

and this is the line when called with the following url: http://mytest.server.com/WebServices/WSGoogleMaps.asmx

2007-02-22 18:15:27 192.167.1.273 GET /WebServices/WSGoogleMaps.asmx/jsdebug - 80 - 132.136.112.84 Mozilla/4.0+(compatible;+MSIE+7.0;+Windows+NT+5.1;+InfoPath.2;+.NET+CLR+2.0.50727;+.NET+CLR+1.1.4322) 500 0 0

I have tried it on the server itself as well. If I use domainname then it is giving 500 internal error in IE7 or authentication failed in Firefox. This is the line when called from the server itself using domain name:

2007-02-22 16:41:04 192.167.1.273 GET /WebServices/WSGoogleMaps.asmx/jsdebug - 80 - 192.167.1.273 Mozilla/5.0+(Windows;+U;+Windows+NT+5.2;+en-US;+rv:1.8.1.1)+Gecko/20061204+Firefox/2.0.0.1 500 0 0

I simply don't understand that how same code on the same machine works with localhost in the url but gives error when called with domain name in the url. I am totally lost. Please help me solve it ... I need to solve it urgently. Thanks.

Hi there,

We are experiencing the same issue that seems to do with the domain name causing the authentication error in some environments. Did you ever get a resolution to this issue?

AJAX AutoCompleteExtender

Hi, I'm a newbie to the AJAX tool kit.

I have few basic questions.

1) Is it necessary to have a webservice running to get the data from the data base.. My question is, assume i have a list of Employee names.As soon as i started typing in the Text Field i need to display the Employee name. I have seen a Video session on this. but do we exactly need to run the webservice which has data base conection and retrieval from the database?

2) is it sufficient to have a method to get the data from DB in the .cs file.

Suggest me the Best one.

Tell me a best practise link where i can learn them from basics...

Thanks,

Mythily

Hi Mythily,

No, you have an alternative option, PageMethod. This is a static method defined in the page itself and can be accessed from client side directly.

For example:

// this method is defined in the page itself
[System.Web.Services.WebMethod]
[System.Web.Script.Services.ScriptMethod]
public staticstring[] GetCompletionList(string prefixText, int count)
{
string[] words = prefixText.Split(new char[] { ';' });
string[] result = new string[16];
for (int i = 0; i < 16; i++)
{
result[i] = "aaaa";
}
return result;
}

<ajaxToolkit:AutoCompleteExtender CompletionSetCount="4" CompletionListCssClass="completeListStyle" BehaviorID="ace" ID="AutoCompleteExtender1"ServicePath="AutoCompleteExtender.aspx" ServiceMethod="GetCompletionList"runat="server" TargetControlID="TextBox1">

Hope

AJAX and mobile device problem

I have a web application that needs to go and check a webservice on timed basis for some data. If the data exists I want to get the data and then navigate on the cient to another page. I initially got this working on normal internet explorer on my pc using the ScriptManager, and an update panel with an AJAX timer on it. This way the timer would not cause a full page rendering. When the timer fired he would check the webservice and then navigate on if the data existed.

Then I tried this on a Windows Mobile 5, and 6 device to which it appears the timer never fires. I simplified my code by updating a label when the timer fires and this doesn't happen either. So my conclusion was that the AJAX timer does not work on mobile devices. How can I accomplish the same task in another way without a complete page refresh on interval?

Thanks in advance

Steve

Here's some information on AJAX and Windows Mobilehttp://blogs.msdn.com/iemobile/archive/2005/11/15/493200.aspx andhttp://blogs.msdn.com/iemobile/archive/2007/07/03/another-ajax-sample-for-ie-mobile-plus-json-and-asp-net-ajax-tips.aspx. Nothing specific about the UpdatePanel though...

-Damien