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• WCF channel timed out error

  - by stackuser3

  Hi, I have devloped an application which connects the database thrugh WCF + LINQ. I am able invoke the service from my asp.net application successfuly. But the problem here is that, when i navigate from end to end in my application almost after four or five clicks, i am getting the late response and says channel timed out error. If anyone is aware about the soltion for this. It would be really helpful for me. Thanks,

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• Returning a byte[] in WCF service

  - by acadia

  Is it a good practice to return a byte[] in a WCF service which will be invoked by many applications below is the code public byte[] GetDoc(string docParam) { byte[] doc; doc = GenerateDoc(docParam); } Thanks

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• Customizing the Test Status on the TFS 2010 SSRS Stories Overview Report

  - by Bob Hardister

  This post shows how to customize the SQL query used by the Team Foundation Server 2010 SQL Server Reporting Services (SSRS) Stories Overview Report. The objective is to show test status for the current version while including user story status of the current and prior versions.  Why? Because we don’t copy completed user stories into the next release. We only want one instance of a user story for the product because we believe copies can get out of sync when they are supposed to be the same. In the example below, work items for the current version are on the area path root and prior versions are not on the area path root. However, you can use area path or iteration path criteria in the query as suits your needs. In any case, here’s how you do it: 1. Download a copy of the report RDL file as a backup 2. Open the report by clicking the edit down arrow and selecting “Edit in Report Builder” 3. Right click on the dsOverview Dataset and select Dataset Properties 4. Update the following SQL per the comments in the code: Customization 1 of 3 … -- Get the list deliverable workitems that have Test Cases linked DECLARE @TestCases Table (DeliverableID int, TestCaseID int); INSERT @TestCases     SELECT h.ID, flh.TargetWorkItemID     FROM @Hierarchy h         JOIN FactWorkItemLinkHistory flh             ON flh.SourceWorkItemID = h.ID                 AND flh.WorkItemLinkTypeSK = @TestedByLinkTypeSK                 AND flh.RemovedDate = CONVERT(DATETIME, '9999', 126)                 AND flh.TeamProjectCollectionSK = @TeamProjectCollectionSK         JOIN [CurrentWorkItemView] wi ON flh.TargetWorkItemID = wi.[System_ID]                  AND wi.[System_WorkItemType] = @TestCase             AND wi.ProjectNodeGUID  = @ProjectGuid              --  Customization 1 of 3: only include test status information when test case area path = root. Added the following 2 statements              AND wi.AreaPath = '{the root area path of the team project}'  …          Customization 2 of 3 … -- Get the Bugs linked to the deliverable workitems directly DECLARE @Bugs Table (ID int, ActiveBugs int, ResolvedBugs int, ClosedBugs int, ProposedBugs int) INSERT @Bugs     SELECT h.ID,         SUM (CASE WHEN wi.[System_State] = @Active THEN 1 ELSE 0 END) Active,         SUM (CASE WHEN wi.[System_State] = @Resolved THEN 1 ELSE 0 END) Resolved,         SUM (CASE WHEN wi.[System_State] = @Closed THEN 1 ELSE 0 END) Closed,         SUM (CASE WHEN wi.[System_State] = @Proposed THEN 1 ELSE 0 END) Proposed     FROM @Hierarchy h         JOIN FactWorkItemLinkHistory flh             ON flh.SourceWorkItemID = h.ID             AND flh.TeamProjectCollectionSK = @TeamProjectCollectionSK         JOIN [CurrentWorkItemView] wi             ON wi.[System_WorkItemType] = @Bug             AND wi.[System_Id] = flh.TargetWorkItemID             AND flh.RemovedDate = CONVERT(DATETIME, '9999', 126)             AND wi.[ProjectNodeGUID] = @ProjectGuid              --  Customization 2 of 3: only include test status information when test case area path = root. Added the following statement              AND wi.AreaPath = '{the root area path of the team project}'       GROUP BY h.ID … Customization 2 of 3 … -- Add the Bugs linked to the Test Cases which are linked to the deliverable workitems -- Walks the links from the user stories to test cases (via the tested by link), and then to -- bugs that are linked to the test case. We don't need to join to the test case in the work -- item history view. -- --    [WIT:User Story/Requirement] --> [Link:Tested By]--> [Link:any type] --> [WIT:Bug] INSERT @Bugs SELECT tc.DeliverableID,     SUM (CASE WHEN wi.[System_State] = @Active THEN 1 ELSE 0 END) Active,     SUM (CASE WHEN wi.[System_State] = @Resolved THEN 1 ELSE 0 END) Resolved,     SUM (CASE WHEN wi.[System_State] = @Closed THEN 1 ELSE 0 END) Closed,     SUM (CASE WHEN wi.[System_State] = @Proposed THEN 1 ELSE 0 END) Proposed FROM @TestCases tc     JOIN FactWorkItemLinkHistory flh         ON flh.SourceWorkItemID = tc.TestCaseID         AND flh.RemovedDate = CONVERT(DATETIME, '9999', 126)         AND flh.TeamProjectCollectionSK = @TeamProjectCollectionSK     JOIN [CurrentWorkItemView] wi         ON wi.[System_Id] = flh.TargetWorkItemID         AND wi.[System_WorkItemType] = @Bug         AND wi.[ProjectNodeGUID] = @ProjectGuid         --  Customization 3 of 3: only include test status information when test case area path = root. Added the following statement         AND wi.AreaPath = '{the root area path of the team project}'     GROUP BY tc.DeliverableID … 5. Save the report and you’re all set. Note: you may need to re-apply custom parameter changes like pre-selected sprints.

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• Using custom DataContractResolver in WCF, to transport inheritance trees involving generics

  - by Benson

  I've got a WCF service, in which there are operations which accept a non-generic base class as parameter. [DataContract] class Foo { ... } This base class is in turn inherited, by such generics classes as [DataContract] class Bar : Foo { ... } To get this to work, I'd previously have to register KnownTypes for the Foo class, and have these include all possible variations of Bar (such as Bar, Bar and even Bar). With the DataContractResolver in .NET 4, however, I should be able to build a resolver which properly stores (and restores) the classes. My questions: Are DataContractResolvers typically only used on the service side, and not by the client? If so, how would that be useful in this scenario? Am I wrong to write a DataContractResolver which serializes the fully qualified type name of a generic type, such as Bar1[List1[string, mscorlib], mscorlib] ? Couldn't the same DataContractResolver on the client side restore these types?

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• WCF NetTcpBinding Buffered vs Streamed performance problems

  - by DxCK

  I wrote a WCF service that should transform any size of files, using the Streamed TransferMode in NetTcpBinding, and System.IO.Stream object. When running performance test, i found significant performance problem. Then I decided to test it with Buffered TransferMode and saw that performance is two times faster! Because my service should transfer big files, i just can't stay in Buffered TransferMode because of memory management overhead on big files at the server and client side together. Why is Streamed TransferMode slower than the Buffered TransferMode? What can i do to make Stremed performance better?

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• 405 Method Not Allowed Error in WCF

  - by DotnetDude

  Can someone spot the problem with this implementation? I can open it up in the browser and it works, but a call from client side (using both jquery and asp.net ajax fails) Service Contract [OperationContract(Name = "GetTestString")] [WebInvoke(Method = "GET", ResponseFormat = WebMessageFormat.Json )] string GetTestString(); In Web.config among other bindings, I have a webHttp binding <endpoint address="ajax" binding="webHttpBinding" contract="TestService" behaviorConfiguration="AjaxBehavior" /> EndPoint Behavior <endpointBehaviors> <behavior name="AjaxBehavior"> <enableWebScript/> </behavior> </endpointBehaviors> </behaviors> Svc file <%@ ServiceHost Service="TestService" %> Client var serviceUrl = "http://127.0.0.1/Test.svc/ajax/"; var proxy = new ServiceProxy(serviceUrl); I am then using the approach in http://www.west-wind.com/weblog/posts/324917.aspx to call the service

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• What is the advantage of WSDualHttpBinding in WCF?

  - by schmoopy

  How much benefit would there be to using WSDualHttpBinding with IIS hosted service vs. a client poll that calls the WCF service, assuming in the latter the service cached the data in question? This scenerio would be for a notify type of service where the clients need to be notified by the service when an event occurs. Specifically, what advantages would WSDualHttpBinding provide over polling? ie: Less network traffic, faster to design, easier to maintain, more control ??? From what i understand, WSDualHttpBinding is less scalable than client polling, so why use it at all? Edit: As Matt supplied, time critical can be one reason for the duplex binding. Here is what i have so far: WSDualHttpBinding adv: can get immediate response w/o waiting on polling timer dis: less scalable than WsHttpBinding dis: less firewall friendly I'll add to this based on comments, please let me know if i state anything incorrectly. thanks for you input :-)

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• WCF/C# Unable to catch EndpointNotFoundException

  - by Paul Jones

  Hi all, I have created a WCF service and client and all works until it come to catching errors. Specifically I am try to catch the EndpointNotFoundException for when the server happens not to be there for whatever reason, I have tried performing a simple try catch block catching the specific error and the communication exception it derives from and I've tried catching just Exception. None of these succeed in catching the exception, however I do get A first chance exception of type 'System.ServiceModel.EndpointNotFoundException' occurred in System.ServiceModel.dll in the output window when the client tries to open the service. Any ideas as to what I'm doing wrong?

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• Ajax call to wcf windows service over ssl (https)

  - by bpatrick100

  I have a windows service which exposes an endpoint over http. Again this is a windows service (not a web service hosted in iis). I then call methods from this endpoint, using javascript/ajax. Everything works perfectly, and this the code I'm using in my windows service to create the endpoint: //Create host object WebServiceHost webServiceHost = new WebServiceHost(svcHost.obj, new Uri("http://192.168.0.100:1213")); //Add Https Endpoint WebHttpBinding binding = new WebHttpBinding(); webServiceHost.AddServiceEndpoint(svcHost.serviceContract, binding, string.Empty); //Add MEX Behaivor and EndPoint ServiceMetadataBehavior metadataBehavior = new ServiceMetadataBehavior(); metadataBehavior.HttpGetEnabled = true; webServiceHost.Description.Behaviors.Add(metadataBehavior); webServiceHost.AddServiceEndpoint(ServiceMetadataBehavior.MexContractName, MetadataExchangeBindings.CreateMexHttpBinding(), "mex"); webServiceHost.Open(); Now, my goal is to get this same model working over SSL (https not http). So, I have followed the guidance of several msdn pages, like the following: http://msdn.microsoft.com/en-us/library/ms733791(VS.100).aspx I have used makecert.exe to create a test cert called "bpCertTest". I have then used netsh.exe to configure my port (1213) with the test cert I created, all with no problem. Then, I've modified the endpoint code in my windows service to be able to work over https as follows: //Create host object WebServiceHost webServiceHost = new WebServiceHost(svcHost.obj, new Uri("https://192.168.0.100:1213")); //Add Https Endpoint WebHttpBinding binding = new WebHttpBinding(); binding.Security.Mode = WebHttpSecurityMode.Transport; binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Certificate; webServiceHost.AddServiceEndpoint(svcHost.serviceContract, binding, string.Empty); webServiceHost.Credentials.ServiceCertificate.SetCertificate("CN=bpCertTest", StoreLocation.LocalMachine, StoreName.My); //Add MEX Behaivor and EndPoint ServiceMetadataBehavior metadataBehavior = new ServiceMetadataBehavior(); metadataBehavior.HttpsGetEnabled = true; webServiceHost.Description.Behaviors.Add(metadataBehavior); webServiceHost.AddServiceEndpoint(ServiceMetadataBehavior.MexContractName, MetadataExchangeBindings.CreateMexHttpsBinding(), "mex"); webServiceHost.Open(); The service creates the endpoint successfully, recognizes my cert in the SetCertificate() call, and the service starts up and running with success. Now, the problem is my javascript/ajax call cannot communicate with the service over https. I simply get some generic commication error (12031). So, as a test, I changed the port I was calling in the javascript to some other random port, and I get the same error - which tells me that I'm obviously not even reaching my service over https. I'm at a complete loss at this point, I feel like everything is in place, and I just can't see what the problem is. If anyone has experience in this scenario, please provide your insight and/or solution! Thanks!

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• Catches communication exception instead of custom fault exception - WCF

  - by Ismail S

  On Server I'm throwing the exception like this. catch(SqlException exception) { if (exception.Message.Contains("Custom error from stored proc")) { //Exception to be thrown when authentication fails. throw new FaultException<MyServiceFault>(new MyServiceFault { MessageText = exception.Message }); } } And on client end I'm catching the exception catch(FaultException<MyServiceFault> faultException) { } Here is my MyServiceFault [DataContract] public class MyServiceFault { [DataMember] public string MessageText { get; set; } [DataMember] public Guid Id { get; set; } } The problem is that on client, it doesn't go to MyServiceFault catch block instead it goes to communication exception catch block and throws this error System.ServiceModel.CommunicationException: The underlying connection was closed: The connection was closed unexpectedly. ---> System.Net.WebException I've also decorated my service method [FaultContract(typeof(MyServiceFault))] in the interface which is implemented by my service. In my web.config servicebehaviour tag consist <serviceDebug includeExceptionDetailInFaults="true" /> Any idea where I'm going wrong

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• The remote server returned an unexpected response: (413) Request Entity Too Large

  - by user1583591

  If anyone can help me figure out why I am getting the following error when making a call to my WCF service I would be eternally grateful. The maximum message size quota for incoming messages (65536) has been exceeded. To increase the quota, use the MaxReceivedMessageSize property on the appropriate binding element. I have tried modifying the config file on both the service and client, and made sure the service name includes the namespace. I cannt seem to make any progress. Here is my service config settings: <services> <service name="CCC.CA-CP &amp; Sightlines Campus Carbon Calculator"> <endpoint address="" binding="basicHttpBinding" bindingConfiguration="Binding2" contract="CCC.ICCCService" behaviorConfiguration="WebBehavior2" /> </service> </services> <bindings> <basicHttpBinding> <binding name="Binding2" sendTimeout="00:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="2147483647" maxBufferPoolSize="52428800" maxReceivedMessageSize="2147483647" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true"> <readerQuotas maxDepth="32" maxStringContentLength="2147483647" maxArrayLength="16384" maxBytesPerRead="20000" maxNameTableCharCount="16384" ></readerQuotas> </binding> </basicHttpBinding> </bindings> .. <dataContractSerializer maxItemsInObjectGraph="12097151" /> ... <requestLimits maxAllowedContentLength="157286400" /> ... <httpRuntime useFullyQualifiedRedirectUrl="true" maxRequestLength="2147483647"... I also set the client config with the same binding values. Here is the service contract : namespace CCC { [ServiceContract(Name = "CA-CP & Sightlines Campus Carbon Calculator", Namespace = "http://www.sightlines.com/CCC/01")] public interface ICCCService { .... } Thanks in advance for any help given!

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• WCF Windows Service TimeOut

  - by rmdussa

  I have a client application developed in .net seding a request to wcf service and supposed to send reponse .if execution time with in 1 minute,there is no error,if it exceeds 1 minute the error is Inner exception: This request operation sent to net.tcp://localhost:18001/PitToPort/2008/01/30/StockpileService/tcp did not receive a reply within the configured timeout (00:01:00). The time allotted to this operation may have been a portion of a longer timeout. This may be because the service is still processing the operation or because the service was unable to send a reply message. Please consider increasing the operation timeout (by casting the channel/proxy to IContextChannel and setting the OperationTimeout property) and ensure that the service is able to connect to the client how to increase the time out and how?What is the best solution.

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• WCF ReliableSession and Timeouts

  - by user80108

  I have a WCF service used mainly for managing documents in a repository. I used the chunking channel sample from MS so that I could upload/download huge files. Now I implemented reliable session with the service and I am seeing some strange behaviors. Here are the timeout values I am using. this.SendTimeout = new TimeSpan(0,10,0); this.OpenTimeout = new TimeSpan(0, 1, 0); this.CloseTimeout = new TimeSpan(0, 1, 0); this.ReceiveTimeout = new TimeSpan(0,10, 0); reliableBe.InactivityTimeout = new TimeSpan(0,2,0); I have the following issues. 1. If the Service is not up & running, the clients are not get disconnected after OpenTimeout. I tried it with my test client. Scenario 1: Without Reliable Session: I get the following exception: Could not connect to net.tcp://localhost:8788/MediaManagementService/ep1. The connection attempt lasted for a time span of 00:00:00.9848790. TCP error code 10061: No connection could be made because the target machine actively refused it 127.0.0.1:8788 This is the correct behavior as I have given the OpenTimeout as 1 sec. Scenario 2: With ReliableSession: I get the same exception: Could not connect to net.tcp://localhost:8788/MediaManagementService/ep1. The connection attempt lasted for a time span of 00:00:00.9692460. TCP error code 10061: No connection could be made because the target machine actively refused it 127.0.0.1:8788. But this message comes after around 10 mintes . (I believe after SendTimeout) So here I just have enabled the reliable session and now it looks like the OpenTimeout = SendTimeout for the client. Is this desired behavior? 2: Issue while uploading huge files with ReliableSession: The general rule is that you have to set a huge value for the maxReceivedMessageSize, SendTimeout and ReceiveTimeout. But in the case of Chunking channel, the max received message size doesn't matter as the data is sent in chunks. So I set a huge value for Send and ReceiveTimeout : say 10 hours. Now the upload is going fine, but it has a side effect that, even if the Service is not up, it takes 10 hours to timeout the client connection due to the behavior mentioned in (1). Please let me know your thoughts on this behavior.

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• OData and custom WCF WebGet methods

  - by reinier

  I've created an OData endpoint (using entity framework, WCF data service) and added a custom test WebGet test method like so: [WebGet(UriTemplate = "{text}")] public IQueryable<string> SplitString(string text) { if (text == null) throw new DataServiceException("text not specified"); var result = (from s in text.Split('-') orderby s select s); return result.AsQueryable(); } and a config line: config.SetServiceOperationAccessRule("SplitString", ServiceOperationRights.All); However, no matter how I specify the url, I can not get the text param to be filled out. (it is always null). so: http://localhost/myservice.svc/SplitString/testtext does not work. What is the correct url format (or UriTemplate) one should use? The only examples I found of odata and WebGet only have an example method which doesn't have any parameters.

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• Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data

  - by joebeazelman

  I created an assembly containing WCF service code and dropped into another web project. When I try to invoke a service method, I get the following inner exception: Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. Why this is happening? My newly created assembly lives inside the ASP.NET /bin folder along with other assemblies. At this level, should the database not know or care whether it is being called from a web service or from a normal call? How would it know that my assembly is foreign? How do I resolve this issue?

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• MVC moq unit test the object before RedirecToAction()

  - by Daoming Yang

  I want to test the data inside the "item" object before it redirect to another action. public ActionResult WebPageEdit(WebPage item, FormCollection form) { if (ModelState.IsValid) { item.Description = Utils.CrossSiteScriptingAttackCheck(item.Description); item.Content = Utils.CrossSiteScriptingAttackCheck(item.Content); item.Title = item.Title.Trim(); item.DateUpdated = DateTime.Now; // Other logic stuff here webPagesRepository.Save(item); return RedirectToAction("WebPageList"); } Here is my Test method: [Test] public void Admin_WebPageEdit_Save() { var controller = new AdminController(); controller.webPagesRepository = DataMock.WebPageDataInit(); controller.categoriesRepository = DataMock.WebPageCategoryDataInit(); FormCollection form = DataMock.CreateWebPageFormCollection(); RedirectToRouteResult actionResult = (RedirectToRouteResult)controller.WebPageEdit(webPagesRepository.Get(1), form); Assert.IsNotNull(actionResult); Assert.AreEqual("WebPageList", actionResult.RouteValues["action"]); var item = ((ViewResult)controller.WebPageEdit(webPagesRepository.Get(1), form)).ViewData.Model as WebPage; Assert.NotNull(item); Assert.AreEqual(2, item.CategoryID); } It failed at this line: var item = ((ViewResult)controller.WebPageEdit(webPagesRepository.Get(1), form)).ViewData.Model as WebPage; I am thinking about is there any ways to test the "item" object before it redirect to other actions?

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• WCF Service worker thread communicate with ServiceHost thread

  - by Brent

  I have a windows NT Service that opens a ServiceHost object. The service host context is per-session so for each client a new worker thread is created. What I am trying to do is have each worker thread make calls to the thread that started the service host. The NT Service needs to open a VPN connection and poll information from a device on the remote network. The information is stored in a SQL database for the worker threads to read. I only want to poll the device if there is a client connected, which will reduce network trafic. I would like the worker threads to tell the service host thread that they are requesting information and start the polling and updating the database. Everything is working if the device is alway being polled and the database being updated.

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• Windows Service Hosting WCF Objects over SSL (https) - Custom JSON Error Handling Doesn't Work

  - by bpatrick100

  I will first show the code that works in a non-ssl (http) environment. This code uses a custom json error handler, and all errors thrown, do get bubbled up to the client javascript (ajax). // Create webservice endpoint WebHttpBinding binding = new WebHttpBinding(); ServiceEndpoint serviceEndPoint = new ServiceEndpoint(ContractDescription.GetContract(Type.GetType(svcHost.serviceContract + ", " + svcHost.assemblyName)), binding, new EndpointAddress(svcHost.hostUrl)); // Add exception handler serviceEndPoint.Behaviors.Add(new FaultingWebHttpBehavior()); // Create host and add webservice endpoint WebServiceHost webServiceHost = new WebServiceHost(svcHost.obj, new Uri(svcHost.hostUrl)); webServiceHost.Description.Endpoints.Add(serviceEndPoint); webServiceHost.Open(); I'll also show you what the FaultingWebHttpBehavior class looks like: public class FaultingWebHttpBehavior : WebHttpBehavior { public FaultingWebHttpBehavior() { } protected override void AddServerErrorHandlers(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher) { endpointDispatcher.ChannelDispatcher.ErrorHandlers.Clear(); endpointDispatcher.ChannelDispatcher.ErrorHandlers.Add(new ErrorHandler()); } public class ErrorHandler : IErrorHandler { public bool HandleError(Exception error) { return true; } public void ProvideFault(Exception error, MessageVersion version, ref Message fault) { // Build an object to return a json serialized exception GeneralFault generalFault = new GeneralFault(); generalFault.BaseType = "Exception"; generalFault.Type = error.GetType().ToString(); generalFault.Message = error.Message; // Create the fault object to return to the client fault = Message.CreateMessage(version, "", generalFault, new DataContractJsonSerializer(typeof(GeneralFault))); WebBodyFormatMessageProperty wbf = new WebBodyFormatMessageProperty(WebContentFormat.Json); fault.Properties.Add(WebBodyFormatMessageProperty.Name, wbf); } } } [DataContract] public class GeneralFault { [DataMember] public string BaseType; [DataMember] public string Type; [DataMember] public string Message; } The AddServerErrorHandlers() method gets called automatically, once webServiceHost.Open() gets called. This sets up the custom json error handler, and life is good :-) The problem comes, when we switch to and SSL (https) environment. I'll now show you endpoint creation code for SSL: // Create webservice endpoint WebHttpBinding binding = new WebHttpBinding(); ServiceEndpoint serviceEndPoint = new ServiceEndpoint(ContractDescription.GetContract(Type.GetType(svcHost.serviceContract + ", " + svcHost.assemblyName)), binding, new EndpointAddress(svcHost.hostUrl)); // This exception handler code below (FaultingWebHttpBehavior) doesn't work with SSL communication for some reason, need to resarch... // Add exception handler serviceEndPoint.Behaviors.Add(new FaultingWebHttpBehavior()); //Add Https Endpoint WebServiceHost webServiceHost = new WebServiceHost(svcHost.obj, new Uri(svcHost.hostUrl)); binding.Security.Mode = WebHttpSecurityMode.Transport; binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.None; webServiceHost.AddServiceEndpoint(svcHost.serviceContract, binding, string.Empty); Now, with this SSL endpoint code, the service starts up correctly, and wcf hosted objects can be communicated with just fine via client javascript. However, the custom error handler doesn't work. The reason is, the AddServerErrorHandlers() method never gets called when webServiceHost.Open() is run. So, can anyone tell me what is wrong with this picture? And why, is AddServerErrorHandlers() not getting called automatically, like it does when I'm using non-ssl endpoints? Thanks!

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• WCF with No security

  - by james.ingham

  Hi all, I've got a WCF service setup which I can consume and use as intendid... but only on the same machine. I'm looking to get this working over multiple computers and I'm not fussed about the security. However when I set (client side) the security to = none, I get a InvalidOperationException: The service certificate is not provided for target 'http://xxx.xxx.xxx.xxx:8731/Design_Time_Addresses/WcfServiceLibrary/ManagementService/'. Specify a service certificate in ClientCredentials. So I'm left with: <security mode="Message"> <message clientCredentialType="None" negotiateServiceCredential="false" algorithmSuite="Default" /> </security> But this gives me another InvalidOperationException: The service certificate is not provided for target 'http://xxx.xxx.xxx.xxx:8731/Design_Time_Addresses/WcfServiceLibrary/ManagementService/'. Specify a service certificate in ClientCredentials. Why would I have to provide a certificate if security was turned off? Server app config: <system.serviceModel> <services> <service name="Server.WcfServiceLibrary.CheckoutService" behaviorConfiguration="Server.WcfServiceLibrary.CheckoutServiceBehavior"> <host> <baseAddresses> <add baseAddress = "http://xxx:8731/Design_Time_Addresses/WcfServiceLibrary/CheckoutService/" /> </baseAddresses> </host> <endpoint address ="" binding="wsDualHttpBinding" contract="Server.WcfServiceLibrary.ICheckoutService"> <identity> <dns value="localhost"/> </identity> </endpoint> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/> </service> <service name="Server.WcfServiceLibrary.ManagementService" behaviorConfiguration="Server.WcfServiceLibrary.ManagementServiceBehavior"> <host> <baseAddresses> <add baseAddress = "http://xxx:8731/Design_Time_Addresses/WcfServiceLibrary/ManagementService/" /> </baseAddresses> </host> <endpoint address ="" binding="wsDualHttpBinding" contract="Server.WcfServiceLibrary.IManagementService"> <identity> <dns value="localhost"/> </identity> </endpoint> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/> </service> </services> <behaviors> <serviceBehaviors> <behavior name="Server.WcfServiceLibrary.CheckoutServiceBehavior"> <serviceMetadata httpGetEnabled="True"/> <serviceDebug includeExceptionDetailInFaults="False" /> <serviceThrottling maxConcurrentCalls="100" maxConcurrentSessions="50" maxConcurrentInstances="50" /> </behavior> <behavior name="Server.WcfServiceLibrary.ManagementServiceBehavior"> <serviceMetadata httpGetEnabled="True"/> <serviceDebug includeExceptionDetailInFaults="False" /> </behavior> </serviceBehaviors> </behaviors> </system.serviceModel> Client app config: <system.serviceModel> <bindings> <wsDualHttpBinding> <binding name="WSDualHttpBinding_IManagementService" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:00:10" bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard" maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true"> <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" /> <reliableSession ordered="true" inactivityTimeout="00:10:00" /> <security mode="Message"> <message clientCredentialType="Windows" negotiateServiceCredential="true" algorithmSuite="Default" /> </security> </binding> </wsDualHttpBinding> </bindings> <client> <endpoint address="http://xxx:8731/Design_Time_Addresses/WcfServiceLibrary/ManagementService/" binding="wsDualHttpBinding" bindingConfiguration="WSDualHttpBinding_IManagementService" contract="ServiceReference.IManagementService" name="WSDualHttpBinding_IManagementService"> <identity> <dns value="localhost" /> </identity> </endpoint> </client> </system.serviceModel> Thanks

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• Is NetNamedPipeBinding binding guaranteed to work only on the same machine?

  - by Asaf R

  Hi, I've created a Windows Service that uses WCF for communications to it. The service should be used be called only from the same machine. If I can guarantee that there's no way to communicate with it from another machine, I can consider it secured. Since I'm using communications on a single machine, I opted to used NetNamedPipeBinding. This bindings documentation says it's Optimized for on-machine communications, but does not give any guarantees. My questions is, does NetNamedPipeBinding provide on-machine-only guarantees? If not what binding does, or how would you go implementing a custom bindings that does provide such guarantees? Thanks, Asaf

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• WCF Self-hosted service, client clean-up on service stop

  - by Sentax

  Hi everyone, I'm curious to know how I would go about setting up my service to stop cleanly on the server the service will be installed on. For example when I have many clients connecting and doing operations every minute and I want to shut-down the service for maintenance, how can I do this in the "OnStop" event of the service to then let the main service host to deny any new client connections and let the current connections finish before it actually shuts down its services to the client, this will ensure data isn't corrupted on the server as the server shuts down. Right now I'm not setup as a singleton because I need scalability in the service. So I would have to somehow get my service host to do this independently of knowing how many instances are created of the service class. I hope I explain myself good enough, if not, let me know, I'll try to explain better. Thanks, Scott

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• Authentication on odata service

  - by Toad

  I want to add some authentication to my odata service. Depending on the user calling i want to: filter rows and/or remove columns. I read in scott hanselmans fine blogpost on odata ( http://www.hanselman.com/blog/CreatingAnODataAPIForStackOverflowIncludingXMLAndJSONIn30Minutes.aspx )that it is possible to intercept the incoming queries. If this works i could add some extra filtering. How would this intercepting and altering queries work exactly? I can not find any examples of where and how to do this. (i'm using entitie framework and wcf dataservices (just like scotts example blog)

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• WCF is throwing UnauthorizedAccessExceptyion after upgrade to .NET 4.0

  - by Andrey

  I have a pretty simple client-server ASP.NET app; communication is via WCF service. All worked perferctly inVS 2008, now I upgraded to VS2010 and every time the client code is trying to instantiate a channel to the server: new ChannelFactory<IMemberService>("Members.MemberService").CreateChannel(); it throws an UnauthorizedAccessException "Access denied". Were there any breaking changes in the new version, or do I need to add some configuration? I'm pretty stuck, any ideas would be highly appreciated! BTW, binding used is basicHttpBinding, i don't know if thats important here. Thank you, Andrey

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• WCF digest Authentication

  - by dudia

  What should be specified on the client side? Is this enough: binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Digest; ... cf.Credentials.HttpDigest.ClientCredential = new NetworkCredential("myuser", "mypass", "mydomain"); cf.Credentials.HttpDigest.AllowedImpersonationLevel = TokenImpersonationLevel.Impersonation; What should be specified on the server side? obviously one needs: binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Digest; but where do one specify in the server the digest username\password to validate the client against? In addition when Micosoft says that Digest Authentication uses the Domain Controller, what does it mean? Does it validate username\password against it?

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• Setting WCF Endpoint address at runtime?

  - by james.ingham

  Hey, If I have the following: WSHttpBinding binding = new WSHttpBinding(); EndpointAddress endpoint = new EndpointAddress(new Uri("http://xxx:pppp/MyService")); MyServiceClient client = new MyServiceClient(binding, endpoint); How can I set the endpoint bindingConfiguration? If it helps my app.config is set to: <endpoint address="http://xxx:pppp/Design_Time_Addresses/WcfServiceLibrary/ManagementService/" binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_IManagementService" contract="ServiceReference.IManagementService"> <identity> <dns value="localhost" /> </identity> </endpoint> However I'm looking to let the user configure this before running the client. Thanks

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