Showing posts with label webservice. Show all posts

Wednesday, March 28, 2012

very basic question about the atlas samples

I went thru the instructions exactly (well almost...the create new item for the webservice in VS2005 is incorrect in the tutorial, it should be Create new website)

http://atlas.asp.net/docs/Walkthroughs/GetStarted/Basic.aspx

But i keep getting aError: Samples is undefined

I tried this in an attempt to fix it..but it failed too (this URL i put in the Start URL in the webservice)..I wasnt sure

<atlas:servicereferencepath="http://localhost:1169/AtlasWebService/HelloWorldService.asmx"/>

What dumb thing am i missing?

Thanks!

What do you get when you go tohttp://localhost:1169/AtlasWebService/HelloWorldService.asmx/js

Executing:

http://localhost:1169/AtlasWebService/HelloWorldService.asmx/js

Gives:

Server Error in '/AtlasWebService' Application.

Request format is unrecognized for URL unexpectedly ending in '/js'.

That is why you are getting the 'undefined Samples' javascript error. Atlas will generate the javascript objects for your webservice if you have it configured correctly. Using /js after your webservice is a good way to test if this is working.

I would recommend taking the following steps to debug this issue:

1) Double check that you are using the April CTP of Atlas. You may want to uninstall your current version and re-install the version found by going to http://atlas.asp.net/ and clicking the 'Download' button.

2) When you create your website, make sure the template you select is called _"Atlas" Web Site_. This template will give you a web.config to start from that has the appropriate configuration settings to enable generation of javascript for your web service.

3) Follow the steps in the walkthrough to create the web service. Note that the instructions are correct. Make sure you right-click on the web project (not the solution) and select 'Add New Item'. Web Service will be one of the options.

4) Test your web service by setting it as the start page and pressing F5. You should get the standard web service test page - click on the web service and make sure it works. If it does, then add '/js' to the path and see if Atlas generates javascript.

5) Follow the steps in the walkthrough to create the test page.

My guess is that your problem is caused by a configuration error. By following the steps above, you should discover what was causing the problem.
Regards,
Kyle

I'm going to assume you are using one of the wallkthroughs like this one,"Walkthrough: Creating a Basic ASP.NET 'Atlas' Web Application"

I ran into this same problem you did and the fix went like this:

When i created the new "Atlas Website", i right clicked on the root and chose "Add New", then "WebService", and put "HelloWorldService.asmx"

This did two things:
- Created "HelloWorldService.asmx" in the root of the directory
- Created "HelloWorldServer.vb" in the App_Code directory

I had then copied and pasted the code right from the sample walkthrough into the VB file....

But here was the catch, and the cause of the problem:
- The sample has "Namespace Samples.Atlas" or something the like wrapped around its classes

- Well, back on the asmx, it had put:
<%@. WebService Language="VB" CodeBehind="~/App_Code/HelloWorldService.vb" Class="HelloWorldService" %>

- And since we had just changed the classes namespace since we copied and pasted from the code on the walkthrough, we broke the link between the two, hence the "Samples in undefined" error

So my fix was to change the asmx file to say

<%@. WebService Language="VB" CodeBehind="~/App_Code/HelloWorldService.vb" Class="Samples.Atlas.HelloWorldService" %>

Problem = solved

Thanks Kyle, it was my error that i didnt read the docs closely enough...i had passed by the right click on the atlas website, and created a asp.net webservice thru the right click new webservice on the solution.

I assume that i can do the latter, later, by manually copying the relevant config entries for Atlas into the non-Atlas asp.net web.config...

thanks again

Very rich data to be presented in pushpin popup - how to?

Hello,

suppose we have a list of objects retrieved from a webservice which we want to present in Virtual Earth Map as a set of pushpins. And one of fields of the object (presented in one pushpin) is another list. For example consider object of the following class:

1public class Point2{3string city;4string lat;5string lon;6 List<Person> list;7}

 wherePerson is another class like:

 1public class Person2{3string firstname;4string lastname;5string about;6}

Now, I need to make a pushpin from every Point object of the list retrieved from the webservice. That's the easy part. :)

My problem is how to present the list of - let say - lastnames from List<Person> list in pushpin popup. Any ideas how to do it in a declarative way?

I'm still using the Atlas, not ASP.NET AJAX.

Please! Any help! I'm so confused :)

Hi,

check the mashup in my signature, it performs something similar, but with a list of images. You can download the source code.

Wow. This is a very nice application. :)I'm studying it hard.

Maybe you know some good sources of information about xml-script?

Just wondering, is your demo updated for the Beta release?

Hi,

no, at the moment it works only with the July CTP.

So, any clues where to find information about programming Atlas in a declarative way (by XML-script)?

Your demo is excellent example, but still example and I would love to learn all of it :) The old Atlas documentation is not available. Maybe someone has it?

Monday, March 26, 2012

Wait for response webservice

Hi everyone,

I'm kinda stuck over here. I hope someone can help me.

I have an input button on my page which has the onClick event and the onServerClick event. In the onClick event, the JavaScript code makes a call to a webservice. This webservice adds some records in a database table. After the webservice succesfully finishes, it response should be true.

The procedure goes like this:

function UpdateProduct(){...WebService.UpdateProduct(values, UpdateProduct_Callback);...}function UpdateProduct_Callback(response){return response;}

The onServerClick event refreshes the gridview I am using and selects the new record and its attributes.

The server side code executed by the onServerClick event should not be executed until the webservice is finished.

Is it possible to get the response in the UpdateProduct javascript function and return it? Like onClick="return UpdateProduct();"?

Thanks for your help!

No a callback is done after the WebService finishes on a seperate thread. Thats the whole point of a callBack, you dont have to wait for the method to finish executing. If you want to get the return value, wait for your method to finish, instead of using a callback.

Thanks for your quick reply.

Is there any other way to wait on the return value of the webservice through JavaScript without the callback? Or is it better do do it from the server side code?

You have to do it server side, JS only supports callbacks on webservice calls.

Thanks for your help. I will do it through server side code.

Saturday, March 24, 2012

WCF 3.5 ajax webservice compilation error

I had AJAX ScriptService, which I converted to WCF 3.5 webservice.

Everything works fine for some time, but after a while (maybe after session timeouts or IIS recycles process) it stops working, and I get this error in Event Log:

WebHost failed to process a request.
Sender Information: System.ServiceModel.Activation.HostedHttpRequestAsyncResult/19949373
Exception: System.ServiceModel.ServiceActivationException: The service '/ve/MapService.svc' cannot be activated due to an exception during compilation. The exception message is: Could not load file or assembly 'App_Web_nao50rcd, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.. --> System.IO.FileNotFoundException: Could not load file or assembly 'App_Web_nao50rcd, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
File name: 'App_Web_nao50rcd, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'
at System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection)
at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
at System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
at System.Reflection.Assembly.Load(String assemblyString)
at System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(String constructorString, Uri[] baseAddresses)
at System.ServiceModel.ServiceHostingEnvironment.HostingManager.CreateService(String normalizedVirtualPath)
at System.ServiceModel.ServiceHostingEnvironment.HostingManager.ActivateService(String normalizedVirtualPath)
at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath)
WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].
-- End of inner exception stack trace --
at System.ServiceModel.AsyncResult.End[TAsyncResult](IAsyncResult result)
at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.End(IAsyncResult result)
Process Name: w3wp
Process ID: 2480

Webservice is using sessions and the code is inside /App_Code/ folder.

Any suggestions?

I tried to disable ASP.Net compatibility mode (required for sessions) and then everything works fine for MUCH longer (maybe 8 hours?), but after a while i still get the same error.

Can you please show the WCF configuration as well as how you're registering the service in the webapp.

web.config:

<system.web>
<httpHandlers>
<remove verb="*" path="*.asmx"/>
<add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add path="*_AppService.axd" verb="*" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false"/>
<add path="ScriptResource.axd" verb="GET,HEAD" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false"/>
</httpHandlers>
<httpModules>
<add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</httpModules>
...
</system.web>

<system.webServer>
<validation validateIntegratedModeConfiguration="false"/>
<modules>
<remove name="ScriptModule"/>
<add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</modules>
<handlers>
<remove name="ScriptHandlerFactory"/>
<remove name="ScriptHandlerFactoryAppServices"/>
<remove name="ScriptResource"/>
<remove name="WebServiceHandlerFactory-Integrated"/>
<add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</handlers>
</system.webServer>

<system.codedom>
<compilers>
<compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CSharp.CSharpCodeProvider,System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" warningLevel="4">
<providerOption name="CompilerVersion" value="v3.5"/>
<providerOption name="WarnAsError" value="false"/>
</compiler>
<compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.VisualBasic.VBCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" warningLevel="4">
<providerOption name="CompilerVersion" value="v3.5"/>
<providerOption name="OptionInfer" value="true"/>
<providerOption name="WarnAsError" value="false"/>
</compiler>
</compilers>
</system.codedom>

<system.serviceModel>
<bindings>
<webHttpBinding>
<binding name="jsonBinding" maxReceivedMessageSize="655360" />
</webHttpBinding>
</bindings>
<behaviors>
<endpointBehaviors>
<behavior name="MapServiceAspNetAjaxBehavior">
<enableWebScript />
</behavior>
</endpointBehaviors>
<serviceBehaviors>
<behavior name="metadataSupport">
<serviceMetadata httpGetEnabled="true" httpGetUrl="" />
<serviceDebug includeExceptionDetailInFaults="true" />
<dataContractSerializer />
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
<services>
<service behaviorConfiguration="metadataSupport" name="MapService">
<endpoint address="" behaviorConfiguration="MapServiceAspNetAjaxBehavior"
binding="webHttpBinding" bindingConfiguration="jsonBinding" contract="MapService" />
</service>
</services>
</system.serviceModel>

MapService.svc:

<%@.ServiceHostLanguage="C#"Debug="true"Service="MapService"CodeBehind="~/App_Code/MapService.cs" %>

MapService.cs:

[ServiceContract(Namespace = "SCi", Name = "MapService")]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Required)]
public class MapService { ... }

Also - same error happens when running on IIS or VS built-in ASP.Net Development Server...

do you find the problem?

I think the problem is related to IIS7 - cause seems like problem is happening only on my dev machines which are running Vista Ultimate 64 bit. Though few times it happened on Windows 2003 Server x32, but it does not happen all the time like on Vista.

Wednesday, March 21, 2012

Web Service Access using JavaScript

I've installed the ASP.NET Futures on my dev machine after VS 2008 with .NET 3.5 was installed. When I attempt to access my webservice marked as Namespace.Class.Function, I receive a JavaScript error stating 'TestNamespace' is undefined. Any ideas what could be happening? It seems to occur when I add the converters in my web.config file:

<jsonSerialization maxJsonLength="8388608"> <converters> <add name="DataSetConverter" type="Microsoft.Web.Preview.Script.Serialization.Converters.DataSetConverter, Microsoft.Web.Preview"/> <add name="DataRowConverter" type="Microsoft.Web.Preview.Script.Serialization.Converters.DataRowConverter, Microsoft.Web.Preview"/> <add name="DataTableConverter" type="Microsoft.Web.Preview.Script.Serialization.Converters.DataTableConverter, Microsoft.Web.Preview"/> </converters></jsonSerialization>

Got it. Wrong version of the Microsoft.Web.Preview.dll file in the bin.

Can you please let me know the right version? I can't find a download for the .net 3.5 version of this DLL on ajax.asp.net website, only the July 2007 version.

Thanks

Angie

I've tracked this down. Web.config required the following entry for it to work.

Web service and time zones problem in AJAX ASP.NET Beta 1.0

Hello, I have the followong exception, during requesting a webservice.

Requested URL:https://www.some_site.com/Services/Logout.asmx/js
Exception Message: Specified argument was out of the range of valid values.
Parameter name: utcDate
Exception Details: System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
Parameter name: utcDate
at System.Web.HttpCachePolicy.UtcSetLastModified(DateTime utcDate)
at System.Web.HttpCachePolicy.SetLastModified(DateTime date)
at Microsoft.Web.Script.Services.RestClientProxyHandler.ProcessRequest(HttpContext context)
at Microsoft.Web.Script.Services.ScriptHandlerFactory.HandlerWrapper.ProcessRequest(HttpContext context)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Thread: IsImpersonating = False

As I investigated, the problem originates because utcDate in method UtcSetLastModified is the date in future. This happens because the time zone on our side differs from the server's time zone where we deploy our application.

Please, HELP!

Thanks for letting us know about this problem! This looks like a valid bug.

How are you deploying your app? Am I correct in guessing you are using the "Publish web site" feature of VS or the "aspnet_compiler"? If not, can you please let me know how you deploy it?

Do you mean that the time zone is different on the computer where you built your app and the server where you deploy?

Until we fix the bug, one workaround I can think of is to "touch" the precompiled dlls in our app's bin directory to update the last modfied time on them.

We build our application using MSBuild on local TFS (one time zone), and then just copy all builded dll's and other files to production server (it is in another time zone).

Another workaround i've found is to set in ScriptManager->ServiceRefrence InlineScript property to true, then all js for my web service will be included in the output page, so there's no need to requesthttps://www.some_site.com/Services/Logout.asmx/js