We have created a WCF service application for a customer. Since the service is used to transmit large amounts of data (which can take a long time), some changes (such as increased timeout limits or message size limits) have been made to the Web.config file to accommodate this.
Everything works fine and there are no technical issues... except the client isn't exactly happy that whenever they create a new application which consumes the WCF service they need to manually add all the changes to the client-side App.config file.
They would like to have the changes to be read from the service automatically.
I've never of WCF having such functionality, so I don't think this is possible. But I would very much like to have this confirmed... or denied, if this is actually possible.
IIRC .. in earlier releases of the stocktrader app.
How to implement Configuration Service 5.0 of the StockTrader 5.0 sample application?
mentioned in the above SOF link
There was a way to get configuration from a service.
However, the stocktrader app looks much different now then it did earlier.
So I don't know which version it become something different.
Greg Leake (Leak) was the name of the dude I met at TechEd one year....talking about this, IIRC.
IT IS NOT TRIVIAL TO IMPLEMENT.
The cost of editing some clientside config files........vs the configuration service.....you'll have to make that call.
But it sounds like you have a case of your client needing some cheese with their whine.
Here is an older video...that might get you on the right path.
http://channel9.msdn.com/Shows/Endpoint/endpointtv-High-Performance-WCF-NET-Stock-Trader-with-Greg-Leake
This PDF
http://download.microsoft.com/download/7/C/9/7C9F7B89-8AF0-4433-AB3A-B615C8EF9484/ConfigServiceVSTemplate.pdf
will give you the hints at it.
It is a lot of work to get a "configuration service" up and running.
We ended up...NOT doing it.......and using xml-manipulation in msbuild tasks.......to tweak the wcf client-side xml sections.
EDIT:
Alternate idea. Put you WCF in separate files..and distribute those.
It will make the "where to edit" much more discernable ..... or go with whole-sale replacement all of the (4) files.
app.config or web.config
<?xml version="1.0"?>
<configuration>
<system.serviceModel>
<behaviors configSource="WCFBehaviors.config">
</behaviors>
<bindings configSource="WCFBindings.config">
</bindings>
<client configSource="WCFClient.config">
</client>
<services configSource="WCFServices.config">
</services>
</system.serviceModel>
Then make the 4 files.
Example WCFServices.config
<services>
<service name="MyApp.MyService">
<endpoint
address = "http://localhost:8001/MyService"
binding = "wsHttpBinding" bindingConfiguration="WSHttpBindingName1"
contract = "MyApp.MyIService" >
</endpoint>
</service>
</services>
Note, these won't be auto-voodoo-included like web.config and app.config.
You'll have to make sure they end up in your build-outputs.
Unless you create a custom method to expose these parameters, or at least the values of them, they are not visible to the consumer.
Config files are supposed to be private which is why you are not able to browse to them in a standard installation.
It sounds to me like your client needs to accept that perhaps when adding a new service, there is a little bit of work that needs to be done. They could in theory cut and paste the servicemodel configuration, or sections of it, from an existing application to save 'some' time.
I have a self-hosted WCF service (VB) residing on a server. This service has a method, which I call from another application, that is supposed to kick off a .cmd file which calls a 3rd party program.
My WCF has used both the old Shell() command and the Process() object. Both can call the .cmd file (located on the server's local drive). The .cmd file looks like this:
echo Before calling 3rd party app >> C:\HelloFubar.txt
cd C:\Program Files\Exstream\Dialog 6.1
Engine -CONTROLFILE=C:\Exstream\Development\LetterWriter\Control Files\Letter.opt
echo After calling 3rd party app >> C:\HelloFubar.txt
Now I know the .cmd file (saved as Letter.cmd) is firing because when I check the txt file after testing my app, the before/after statements have been written. However, the 3rd party application does not start.
Now the weird part -- if I double click the cmd file from explorer, the test statements are written to the text file AND the 3rd party application kicks off. Runs great.
I've double-checked the application and corresponding files to make sure NETWORK_SERVICE has permissions and my service is running under that account. So this does not seem to be a rights issue.
Any ideas?
Thanks,
Jason
Whew! Only took a week or two!
Note to self:
Self, you must make sure that any 3rd party applications kicked off from the NETWORK_SERVICE account are not trying to do things the NETWORK_SERVICE account does not have explicit rights to do. Like write to the registry, delete files and other tasks.
Try starting the service under an admins account, and make sure to use the servicePrincipalName attribute in the client when calling a WCF running under any account other than NETWORK_SERVICE. An example would be like this in the client's config file:
<endpoint address="net.tcp://myserver-2:8080/Service" binding="netTcpBinding"
bindingConfiguration="NetTcpBinding_IService1" contract="TCPService.IService1"
name="NetTcpBinding_IService1">
<identity>
<servicePrincipalName value="MyServiceReferenceName(InSolutionExplorer)\myserver-2"/>
<dns value="myserver-2.mydomain.local" />
</identity>
</endpoint>
Hope this can help somebody else out there!
I have a service I am trying to consume in a unit test. At this point I'm just trying to instantiate the thing. After suffering the "Could not find default endpoint element that references contract" error for hours and unable to figure it out, I completely deleted out the consumer and started from scratch. All I did was add a service reference to my test project, point it at my service, hit "GO" and that's it. Still doesn't work. I didn't touch a line of code, yet it doesn't work right after I let VS build the thing.
Here is the relevant line in my app.config for the test project:
<client>
<endpoint address="http://mike-laptop/kbs/FFEDI/Service.svc"
binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_IEdiService"
contract="ServiceReference2.IEdiService" name="BasicHttpBinding_IEdiService" />
</client>
In my unit test, here is my method:
public void CreateWebServiceInstance()
{
ServiceReference2.EdiServiceClient webService = new ServiceReference2.EdiServiceClient();
string svcAddress = webService.Endpoint.Address.ToString();
Console.WriteLine("Address is: " + svcAddress);
Assert.IsTrue(svcAddress.Equals("http://mike-laptop/kbs/FFEDI/Service.svc")); // test
}
The error I get is:
System.InvalidOperationException:
Could not find default endpoint
element that references contract
'ServiceReference2.IEdiService' in the
ServiceModel client configuration
section. This might be because no
configuration file was found for your
application, or because no endpoint
element matching this contract could
be found in the client element.
Again, I didn't change anything this time. Any ideas?
Is the service hosted in IIS? Can you hit it in a browser? Do you have a <binding name="BasicHttpBinding_IEdiService">... in your config? Did you try passing the binding config name into the constructor?
Seems fine at first sight to me... some ideas to check / ponder / verify:
does your test project's app.config get read at all? E.g. is it being interpreted at all? Is there a TestProject.exe.config in your bin\debug directory? I'm thinking maybe the test runner might be playing some tricks and not reading the config at all.
or what happens if you specify the name of the client endpoint when creating your service client?
ServiceReference2.EdiServiceClient webService =
new ServiceReference2.EdiServiceClient("BasicHttpBinding_IEdiService");
Does that change anything at all?
I've added a proxy to a webservice to a VS2008/.NET 3.5 solution. When constructing the client .NET throws this error:
Could not find default endpoint element that references contract 'IMySOAPWebService' in the ServiceModel client configuration section. This might be because no configuaration file was found for your application or because no endpoint element matching this contract could be found in the client element.
Searching for this error tells me to use the full namespace in the contract. Here's my app.config with full namespace:
<client>
<endpoint address="http://192.168.100.87:7001/soap/IMySOAPWebService"
binding="basicHttpBinding" bindingConfiguration="IMySOAPWebServicebinding"
contract="Fusion.DataExchange.Workflows.IMySOAPWebService" name="IMySOAPWebServicePort" />
</client>
I'm running XP local (I mention this because a number of Google hits mention win2k3)
The app.config is copied to app.exe.config, so that is also not the problem.
Any clues?
"This error can arise if you are calling the service in a class library and calling the class library from another project."
In this case you will need to include the WS configuration settings into the main projects app.config if its a winapp or web.config if its a web app. This is the way to go even with PRISM and WPF/Silverlight.
I solved this (I think as others may have suggested) by creating the binding and endpoint address instances myself - because I did not want to add new settings to the config files (this is a replacement for some existing library code which is used widely, and previously used an older Web Service Reference etc.), and so I wanted to be able to drop this in without having add new config settings everywhere.
var remoteAddress = new System.ServiceModel.EndpointAddress(_webServiceUrl);
using (var productService = new ProductClient(new System.ServiceModel.BasicHttpBinding(), remoteAddress))
{
//set timeout
productService.Endpoint.Binding.SendTimeout = new TimeSpan(0,0,0,_webServiceTimeout);
//call web service method
productResponse = productService.GetProducts();
}
Edit
If you are using https then you need to use BasicHttpsBinding rather than BasicHttpBinding.
Having tested several options, I finally solved this by using
contract="IMySOAPWebService"
i.e. without the full namespace in the config. For some reason the full name didn't resolve properly
I've had this same issue. It turns out that for a web REFERENCE, you have to supply the URL as the first parameter to the constructor:
new WebService.WebServiceSoapClient("http://myservice.com/moo.aspx");
For a new style web SERVICE REFERENCE, you have to supply a name that refers to an endpoint entry in the configuration:
new WebService.WebServiceSoapClient("WebServiceEndpoint");
With a corresponding entry in Web.config or App.config:
<client>
<endpoint address="http://myservice.com/moo.aspx"
binding="basicHttpBinding"
bindingConfiguration="WebService"
contract="WebService.WebServiceSoap"
name="WebServiceEndpoint" />
</client>
</system.serviceModel>
Pretty damn hard to remove the tunnel vision on "it worked in an older program"...
I had a situation like this, where i had
WCF Service Hosted somewhere
Main Project
Consumer Project of type 'class Library' which has Service reference to a WCF Service
Main project calls methods from consumer project
Now the Consumer project had all the related configuration setting in <system.serviceModel> Tag of my app.config, its was still throwing the same error as the above.
All i did is added the same tag <system.serviceModel> to my main project's app.config file, and finally we were good to go.
The Real problem, as far as in my case was, it was reading the wrong configuration file. Instead of consumer's app.config, it was referring main proj's config. it took me two hours to figure that out.
"This error can arise if you are calling the service in a class library and calling the class library from another project."
"In this case you will need to include the WS configuration settings into the main projects app.config if its a winapp or web.config if its a web app. This is the way to go even with PRISM and WPF/Silverlight."
Yes, but if you can't change main project (Orchard CMS for example), you can keep WCF service config in your project.
You need to create a service helper with client generation method:
public static class ServiceClientHelper
{
public static T GetClient<T>(string moduleName) where T : IClientChannel
{
var channelType = typeof(T);
var contractType = channelType.GetInterfaces().First(i => i.Namespace == channelType.Namespace);
var contractAttribute = contractType.GetCustomAttributes(typeof(ServiceContractAttribute), false).First() as ServiceContractAttribute;
if (contractAttribute == null)
throw new Exception("contractAttribute not configured");
//path to your lib app.config (mark as "Copy Always" in properties)
var configPath = HostingEnvironment.MapPath(String.Format("~/Modules/{0}/bin/{0}.dll.config", moduleName));
var configuration = ConfigurationManager.OpenMappedExeConfiguration(new ExeConfigurationFileMap { ExeConfigFilename = configPath }, ConfigurationUserLevel.None);
var serviceModelSectionGroup = ServiceModelSectionGroup.GetSectionGroup(configuration);
if (serviceModelSectionGroup == null)
throw new Exception("serviceModelSectionGroup not configured");
var endpoint = serviceModelSectionGroup.Client.Endpoints.OfType<ChannelEndpointElement>().First(e => e.Contract == contractAttribute.ConfigurationName);
var channelFactory = new ConfigurationChannelFactory<T>(endpoint.Name, configuration, null);
var client = channelFactory.CreateChannel();
return client;
}
}
and use it:
using (var client = ServiceClientHelper.GetClient<IDefaultNameServiceChannel>(yourLibName)) {
... get data from service ...
}
See details in this article.
This one drove me crazy.
I'm using Silverlight 3 Prism (CAB) with WCF
When I call a WCF service in a Prism module, I get the same error:
Could not find default endpoint element that references contract
'IMyService' in the service model client configuaration section. This
might be because no configuaration file was found for your application
or because no end point element matching this contract could be found
in the client element
It turns out that its looking in the Shell's .xap file for a ServiceReferences.ClientConfig file, not in the module's ServiceReferences.ClientConfig file. I added my endpoint and binding to the existing ServiceReferences.ClientConfig file in my Silverlight Shell application (it calls it's own WCF services).
Then I had to rebuild the Shell app to generate the new .xap file for my Web project's ClientBin folder.
Now this line of code finally works:
MyServiceClient myService = new MyServiceClient();
Several responses here hit upon the correct solution when you're facing the mind-numbingly obscure error of referencing the service from a class file: copy service config info into your app.config web.config of your console or windows app. None of those answers seem to show you what to copy though. Let's try and correct that.
Here's what I copied out of my class library's config file, into my console app's config file, in order to get around this crazy error for a service I write called "TranslationServiceOutbound".
You basically want everything inside the system.serviceModel section:
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding name="BasicHttpBinding_ITranslationServiceOutbound" />
</basicHttpBinding>
</bindings>
<client>
<endpoint address="http://MyHostName/TranslationServiceOutbound/TranslationServiceOutbound.svc"
binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_ITranslationServiceOutbound"
contract="TranslationService.ITranslationServiceOutbound" name="BasicHttpBinding_ITranslationServiceOutbound" />
</client>
I was getting this error within an ASP.NET application where the WCF service had been added to a class library which is being added to the ASP.NET application as a referenced .dll file in the bin folder. To resolve the error, the config settings in the app.config file within the class library referencing the WCF service needed to be copied into the web.config settings for the ASP.NET site/app.
I had the same problem, but changing the contract namespace didn't work for me. So I tried a .Net 2 style web reference instead of a .Net 3.5 service reference. That worked.
To use a Web reference in Visual Studio 2008, click on 'Add Service Reference', then click 'Advanced' when the dialog box appears. In that you will find an option that will let you use a Web reference instead of a Service reference.
I found (as well as copying to the client UI's App.config as I was using a Class Library interface) I had to prefix the name of the binding with the name of the Service Reference (mine is ServiceReference in the below).
e.g.:
<endpoint address="http://localhost:4000/ServiceName" binding="basicHttpBinding"
bindingConfiguration="BasicHttpBinding_ISchedulerService"
contract="ServiceReference.ISchedulerService"
name="BasicHttpBinding_ISchedulerService" />
instead of the default generated:
<endpoint address="http://localhost:4000/ServiceName" binding="basicHttpBinding"
bindingConfiguration="BasicHttpBinding_ISchedulerService"
contract="ISchedulerService"
name="BasicHttpBinding_ISchedulerService" />
Unit testing a non-library application that consumes a service can cause this problem.
The information that others have entered addresses the root cause of this. If you are trying to write automated test cases and the unit you are testing will actually invoke the service interface, you need to add the service reference to the test project. This is a flavor of the application using library type of error. I did not immediately realize this though because my code that consumes the interface is not in a library. However, when the test actually runs it will be running from the test assembly, not the assembly under test.
Adding a service reference to the unit test project resolved my issue.
I have a situation which in the Unit test. I copied the app.config file to the unit test project. So the unit test project also contains endpoint information.
I faced this problem once. It was because i was still developing the interface that uses WCF service. I configured test application and continued development. Then in development, i changed some of the services' namespaces. So i double checked "system.serviceModel -> client -> endpoint -> contract" in web.config to match WCF class. Then problem is solved.
The namespace in your config should reflect the rest of the namespace path after your client's default namespace (as configured in the project properties). Based on your posted answer, my guess is that your client is configured to be in the "Fusion.DataExchange.Workflows" namespace. If you moved the client code to another namespace you would need to update the config to match the remaining namespace path.
This error can arise if you are calling the service in a class library and calling the class library from another project.
I Have a same Problem.I'm Used the WCF Service in class library and calling the class library from windows Application project.but I'm Forget Change <system.serviceModel> In Config File of windows application Project same the <system.serviceModel> of Class Library's app.Config file.
solution: change Configuration of outer project same the class library's wcf configuration.
Hi I've encountered the same problem but the best solution is to let the .NET to configure your client side configuration. What I discover is this when I add a service reference with a query string of http:/namespace/service.svc?wsdl=wsdl0 it does NOT create a configuration endpoints at the client side. But when I remove the ?wsdl-wsdl0 and only use the url http:/namespace/service.svc, it create the endpoint configuration at the client configuration file. for short remoe the " ?WSDL=WSDL0" .
Do not put service client declaration line as class field,
instead of this, create instance at each method that used in.
So problem will be fixed. If you create service client instance as class field, then design time error occurs !
In case if you are using WPF application using PRISM framework then configuration should exist in your start up project (i.e. in the project where your bootstrapper resides.)
There seem to be several ways to create/fix this issue. For me, the CRM product I am using was written in native code and is able to call my .NET dll, but I run into the configuration information needing to be at/above the main application. For me, the CRM application isn't .NET, so I ended up having to put it in my machine.config file (not where I want it). In addition, since my company uses Websense I had a hard time even adding the Service Reference due to a 407 Proxy Authentication Required issue, that to required a modification to the machine.cong.
Proxy solution:
To get the WCF Service Reference to work I had to copy the information from the app.config of my DLL to the main application config (but for me that was machine.config). And I also had to copy the endpoint information to that same file. Once I did that it starting working for me.
Ok. My case was a little diffrent but finally i have found the fix for it:
I have a Console.EXE -> DLL -> Invoking WS1 -> DLL -> Invoking WS2
I have had both the configurations of the service model of WS1, and WS2 in the Console.EXE.config as recommended. - didnt solve the issue.
But it still didn't work, until i have added the WebReference of WS2 to WS1 also and not only to the DLL that actually creating and invoking the proxy of WS2.
If you reference the web service in your class library then you have to copy app.config to your windows application or console application
solution: change Configuration of outer project same the class library's wcf configuration.
Worked for me
I had the same Issue
I was using desktop app and using Global Weather Web service
I deleted the service reference and added the web reference and problem solved
Thanks
Solution for me was to remove the endpoint name from the Endpoint Name attribute in client web.config
this allowed the proxy to use
ChannelFactory<TService> _channelFactory = new ChannelFactory<TService>("");
only took all day to work out.
Also the contract name was wrong once this fix was in place although it had been wrong when the initial error appear.
Double then triple check for contract name strings people !!
attrib: Ian
Allow me to add one more thing to look for. (Tom Haigh's answer already alludes to it, but I want to be explicit)
My web.config file had the following defined:
<protocolMapping>
<add binding="basicHttpsBinding" scheme="https" />
</protocolMapping>
I was already using basicHttpsBinding for one reference, but then I added a new reference which required basicHttpBinding (no s). All I had to do was add that to my protocolMapping as follows:
<protocolMapping>
<add binding="basicHttpBinding" scheme="http" />
<add binding="basicHttpsBinding" scheme="https" />
</protocolMapping>
As L.R. correctly points out, this needs to be defined in the right places. For me, that meant one in my Unit Test project's app.config as well as one in the main service project's web.config.
I had this error when I was referencing the Contract in the configuration file element without the global scope operator.
i.e.
<endpoint contract="global::MyNamepsace.IMyContract" .../>
works, but
<endpoint contract="MyNamepsace.IMyContract" .../>
gives the "Could not find default endpoint element that references contract" error.
The assembly containing MyNamepsace.IMyContract is in a different assembly to the main application, so this may explain the need to use the global scope resolution.
When you are adding a service reference
beware of namespace you are typing in:
You should append it to the name of your interface:
<client>
<endpoint address="http://192.168.100.87:7001/soap/IMySOAPWebService"
binding="basicHttpBinding"
contract="MyNamespace.IMySOAPWebService" />
</client>
I got same error and I have tried many things but didn't work, than I noticed that my "contract" was not same at all projects, I changed the contract as would be same for all projects inside solution and than it worked.
This is project A
<client>
<endpoint address="https://xxxxxxxx" binding="basicHttpBinding" bindingConfiguration="basic" contract="ServiceReference.IIntegrationService" name="basic" />
</client>
Project B :
<client>
<endpoint address="xxxxxxxxxxxxx" binding="basicHttpBinding" bindingConfiguration="basic" contract="ServiceReference1.IIntegrationService" name="basic" />
</client>
Finally I changed for both as :
<client>
<endpoint address="https://xxxxxxxxxxx" binding="basicHttpBinding" bindingConfiguration="basic" contract="MyServiceReferrence.IIntegrationService" name="basic" />
</client>
I had the same issue and it was solved only when the host application and the dll that used that endpoint had the same service reference name.
My silverlight application loads data fromt he SQL fine when I build locally but when I upload it to the live site it will just wait for data to be loaded but show no errors. It worked up until yesterday where I fear I may have changed a setting somewhere and now I cant access the data it seems?
UPDATE 1: it seems to be a problem with the service references. Everytime I update them, it will clear the ServiceReferences.ClientConfig file and then the program wont build.
UPDATE 2: I have tried cleaning and building but still the same problem.
UPDATE 3: Found an error when trying to access the service reference on the live site:
This collection already contains an address with scheme http. There can be at most one address per scheme in this collection.
Parameter name: item
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.ArgumentException: This collection already contains an address with scheme http. There can be at most one address per scheme in this collection.
Parameter name: item
It sounds like your application is waiting for something, does it time out after 30 seconds? If so, check your SQL connection string.
If there is another tier between Silverlight and SQL (such as a web service), then set up a connection test to make sure that Silverlight is actually reaching SQL...
Did you accidentally replace your live web.config file? If so, try restoring the old web.config as it may have a setting that's not compatable with your server.
Re: Update 1:
Is there an error? If so please paste it. Also please paste the config file in question on pastebin and link to it from here.
Re: Update 3:
The error "This collection already contains an address with scheme http." is caused by not telling a WCF service explicitly what address you wish to bind to when there are many to chosoe from. In this case it looks like IIS is using multiple URLs, for example, consider these fictional addresses:
www.mysite.com
mysite.com
... so the WCF service has no idea which to use unless you tell it.
The solution, to this is to explictly define what URL to use with the following config lines in the web.config (within the system.serviceModel node) of your WCF service.
<serviceHostingEnvironment aspNetCompatibilityEnabled="true">
<baseAddressPrefixFilters>
<add prefix="http://www.mysite.com/SomeDirectory/MyService" />
</baseAddressPrefixFilters>
</serviceHostingEnvironment>
Important:
You should update your question title to indicate that WCF is involved in the solution you have created.