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  • WCF Windows Service - Long operations/Callback to calling module

    - by A9S6
    I have a Windows Service that takes the name of a bunch of files and do operations on them (zip/unzip, updating db etc). The operations can take time depending on size and number of files sent to the service. (1) The module that is sending a request to this service waits until the files are processed. I want to know if there is a way to provide a callback in the service that will notify the calling module when it is finished processing the files. Please note that multiple modules can call the service at a time to process files so the service will need to provide some kind of a TaskId I guess. (2) If a service method is called and is running and another call is made to the same service, then how will that call be processed(I think there is only one thread asociated with the service). I have seen that when the service is taking time in processing a method, the threads associated with the service begin to increase.

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  • WCF MessageHeaders in OperationContext.Current

    - by Nate Bross
    If I use code like this [just below] to add Message Headers to my OperationContext, will all future out-going messages contain that data on any new ClientProxy defined from the same "run" of my application? The objective, is to pass a parameter or two to each OpeartionContract w/out messing with the signature of the OperationContract, since the parameters being passed will be consistant for all requests for a given run of my client application. public void DoSomeStuff() { var proxy = new MyServiceClient(); Guid myToken = Guid.NewGuid(); MessageHeader<Guid> mhg = new MessageHeader<Guid>(myToken); MessageHeader untyped = mhg.GetUntypedHeader("token", "ns"); OperationContext.Current.OutgoingMessageHeaders.Add(untyped); proxy.DoOperation(...); } public void DoSomeOTHERStuff() { var proxy = new MyServiceClient(); Guid myToken = Guid.NewGuid(); MessageHeader<Guid> mhg = new MessageHeader<Guid>(myToken); MessageHeader untyped = mhg.GetUntypedHeader("token", "ns"); OperationContext.Current.OutgoingMessageHeaders.Add(untyped); proxy.DoOtherOperation(...); } In other words, is it safe to refactor the above code like this? bool isSetup = false; public void SetupMessageHeader() { if(isSetup) { return; } Guid myToken = Guid.NewGuid(); MessageHeader<Guid> mhg = new MessageHeader<Guid>(myToken); MessageHeader untyped = mhg.GetUntypedHeader("token", "ns"); OperationContext.Current.OutgoingMessageHeaders.Add(untyped); isSetup = true; } public void DoSomeStuff() { var proxy = new MyServiceClient(); SetupMessageHeader(); proxy.DoOperation(...); } public void DoSomeOTHERStuff() { var proxy = new MyServiceClient(); SetupMessageHeader(); proxy.DoOtherOperation(...); } Since I don't really understand what's happening there, I don't want to cargo cult it and just change it and let it fly if it works, I'd like to hear your thoughts on if it is OK or not.

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  • How to I get the value of a custom soap header in WCF

    - by Jason Coyne
    I have created a custom soap header, and added it into my message via IClientMessageInspector public object BeforeSendRequest(ref System.ServiceModel.Channels.Message request, System.ServiceModel.IClientChannel channel) { var header = new MessageHeader<AuthHeader>(); header.Content = new AuthHeader(Key); header.Actor = "Anyone"; var header2 = header.GetUntypedHeader("Auth", "xWow"); request.Headers.Add(header2); return null; } [DataContract(Name="Auth")] public class AuthHeader { public AuthHeader(string key) { this.Key = key; } [DataMember] public string Key { get; set; } } I also have an IDispatchMessageInspector, and I can find the correct header in the list. However, there is no value. I know that the value went across the wire correctly, because the message string is correct <s:Envelope xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\">\r\n <s:Header>\r\n <Auth s:actor=\"Anyone\" xmlns=\"xWow\" xmlns:i=\"http://www.w3.org/2001/XMLSchema-instance\">\r\n <Key xmlns=\"http://schemas.datacontract.org/2004/07/xWow.Lib\">HERE IS MY KEY VALUE!!!!</Key>\r\n </Auth>\r\n <To s:mustUnderstand=\"1\" xmlns=\"http://schemas.microsoft.com/ws/2005/05/addressing/none\">http://localhost:26443/AuthService.svc</To>\r\n <Action s:mustUnderstand=\"1\" xmlns=\"http://schemas.microsoft.com/ws/2005/05/addressing/none\">http://tempuri.org/IAuthService/GetPayload</Action>\r\n </s:Header>\r\n <s:Body>\r\n <GetPayload xmlns=\"http://tempuri.org/\" />\r\n </s:Body>\r\n</s:Envelope>" But there does not seem to be any property to retrieve this value. The MessageHeaderInfo class has Actor, etc, but nothing else useful I can find. On the client side I had to convert between Header and Untyped header, is there an equivalent operation on the server?

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  • linking the EF 4.0 context to the WCF call context

    - by pablocastilla
    Hello, I would like to create an Entity Framework 4.0 context when a call is received and invoke to save changes when it finish, (something like JPA). I think it is a good idea because I can use the state for all the call, It is short and encapsulate enogh to be threadsafe and long enough for caching calls and the context itself. Any idea how is the best way for implement this?

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  • Passing to service custom class instance in WCF

    - by hgulyan
    Hi, I have my custom class Customer with its properties. I added DataContract mark above the class and DataMember to properties and it was working fine, but I'm calling a service class's function, passing customer instance as parameter and some of my properties get 0 values. While debugging I can see my properties values and after it gets to the function, some properties' values are 0. Why it can be so? There's no code between this two actions. DataContract mark workes fine, everything's ok. Any suggestions on this issue? I tried to change ByRef to ByVal, but it doesn't change anything. Why it would pass other values right and some of integer types just 0? Maybe the answer is simple, but I can't figure it out. Thank You. _ Public Class Customer Private Type_of_clientField As Integer = -1 _ Public Property type_of_client() As Integer Get Return Type_of_clientField End Get Set(ByVal value As Integer) Type_of_clientField = value End Set End Property End Class _ _

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  • WCF ReliableMessaging method called twice

    - by Brian
    Using Fiddler, we see 3 HTTP requests (and matching responses) for each call when: WS-ReliableMessaging is enabled, and, the method returns a large amount of data (17MB) The first HTTP request is a SOAP message with the action "CreateSequence" (presumable to establish the reliable session). The second and third HTTP requests are identical SOAP messages invoking our webservice method. Why are there two identical messages? Here is our config: <system.serviceModel> <client> <endpoint address="http://server/vdir/AccountingService.svc" binding="wsHttpBinding" bindingConfiguration="customWsHttpBinding" behaviorConfiguration="LargeServiceBehavior" contract="MyProject.Accounting.IAccountingService" name="BasicHttpBinding_IAccountingService" /> </client> <bindings> <wsHttpBinding> <binding name="customWsHttpBinding" maxReceivedMessageSize="90000000"> <reliableSession enabled="true"/> <security mode="None" /> </binding> </wsHttpBinding> </bindings> <behaviors> <endpointBehaviors> <behavior name="LargeServiceBehavior"> <dataContractSerializer maxItemsInObjectGraph="2147483647"/> </behavior> </endpointBehaviors> </behaviors> </system.serviceModel> Thanks, Brian

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  • Creating instance of a service-side DataContract class on client-side in WCF

    - by hgulyan
    Hi, I have my custom class Customer with its properties. I added DataContract mark above the class and DataMember to properties and it was working fine, but I'm calling a service class's function, passing customer instance as parameter and some of my properties get 0 values. While debugging I can see my properties values and after it gets to the function, some properties' values are 0. Why it can be so? There's no code between this two actions. DataContract mark workes fine, everything's ok. Any suggestions on this issue? I tried to change ByRef to ByVal, but it doesn't change anything. Why it would pass other values right and some of integer types just 0? Maybe the answer is simple, but I can't figure it out. Thank You. <DataContract()> Public Class Customer Private Type_of_clientField As Integer = -1 <DataMember(Order:=1)> Public Property type_of_client() As Integer Get Return Type_of_clientField End Get Set(ByVal value As Integer) Type_of_clientField = value End Set End Property End Class <ServiceContract(SessionMode:=SessionMode.Allowed)> <DataContractFormat()> Public Interface CustomerService <OperationContract()> Function addCustomer(ByRef customer As Customer) As Long End Interface type_of_client properties value is 6 before I call addCustomer function. After it enters that function the value is 0. UPDATE: The issue is in instance creating. When I create an instance of a class on client side, that is stored on service side, some of my properties pass 0 or nothing, but when I call a function of a service class, that returns a new instance of that class, it works fine. What's is the difference? Could that be serialization issue?

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  • WCF Service w/ SharePoint Error: Could not find default endpoint element that references contract...

    - by Brian Clark
    Full error message: Could not find default endpoint element that references contract 'PublicationServices.IPublicationService' 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. I have a SharePoint site that I have already opened a project for in Visual Studio 2010. I also created a project that contains a WCF Service Application and added it to the same solution that contains the project for my SharePoint site. I have created a visual web part in my SharePoint project that I am trying to use to consume the WCF Service. I am doing so like this, from within the user control for my web part: PublicationServiceClient proxy = new PublicationServiceClient(); Just having this line alone in OnPreRender, Page_Load, etc. will generate the above error. I've read previous posts about having to have items in the config file of the WCF service also in the config file of the consuming application. I have done this, I copied this section the Web.config file in my WCF service and have placed it in the system.serviceModel tags of my SharePoint project's app.config file: In other words, this is in both of my config files. When I add this web part to the front page of my SharePoint site though, I get the above error every time. I should also note that I have created a console app that I was able to use with no problems to consume data from this very same WCF service. Any help would be appreciated!

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  • Getting "Object is read only" error when setting ClientCredentials in WCF

    - by Paul Mrozowski
    I have a proxy object generated by Visual Studio (client side) named ServerClient. I am attempting to set ClientCredentials.UserName.UserName/Password before opening up a new connection using this code: InstanceContext context = new InstanceContext(this); m_client = new ServerClient(context); m_client.ClientCredentials.UserName.UserName = "Sample"; As soon as the code hits the UserName line it fails with an "Object is read-only" error. I know this can happen if the connection is already open or faulted, but at this point I haven't called context.Open() yet. I have configured the Bindings (which uses netTcpBinding) to use Message as it's security mode, and MessageClientCredentialType is set to UserName. Any ideas?

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  • Can't submit new object to WCF DataService because of Primary Key constraint

    - by Rob
    I've got a SQL database that uses Guid's for PK's and upon insert, it generates a NewId(). I have an EF data context setup pointing to that database with the primary keys setup with the Entity key:true, Setter:private and StoreGeneratedPattern:Identity because I want the DB to manage the keys and not have code set the PK property. I have an OData (System.Web.Data.Services.DataService) endpoint to access this data (just like: Hanselman did. I have another app that has a service reference to this service. Upon trying to create a new object from this reference (i.e. Product), the ProductId Primary Key is being defaulted to Guid.Empty when doing var serviceEntities = new ServiceEntities(serviceUri); //OData endpoint var product = new Product(); product.Name = "New Product"; serviceEntities.AddToProducts(product); serviceEntities.SaveChanges(); // error happens here When debugging, I look at the Product.ProductId property and it's set to Guid.Empty. When called SaveChanges, I do not want the ProductId field to be sent to the service. The response I get is: Error processing request stream. Property 'ProductId' is a read-only property and cannot be updated. Please make sure that this property is not present in the request payload. Is there a way to do this or what can I do to get this setup correctly and still have the DB generated the keys. Here is the same setup as the Product example above.

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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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  • Invoking WCF service from Javascript

    - by KhanS
    I have a asp.net web application, and have some java script code in it. While calling the service I am getting the exception Service1 is undefined. Below is my code. Service: namespace WebApplication2 { // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together. [ServiceContract(Namespace="WCFServices")] public interface IService1 { [OperationContract] string HelloWorld(); } } Implementation namespace WebApplication2 { // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in code, svc and config file together. [ServiceBehavior(IncludeExceptionDetailInFaults = true)] [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] public class Service1 : IService1 { public string HelloWorld() { return "Hello world from service"; } } } ASPX page: <asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"> <asp:ScriptManager ID="QNAScriptManager" runat="server"> <Services> <asp:ServiceReference Path="~/Service1.svc" /> </Services> <Scripts> <asp:ScriptReference Path="~/Scripts/Questions.js" /> </Scripts> </asp:ScriptManager> </asp:Content> Java Script var ServiceProxy; function pageLoad() { ServiceProxy = new Service1(); ServiceProxy.set_defaultSucceededCallback(SucceededCallback); } function GetString() { ServiceProxy.HelloWorld(); } function SucceededCallback(result, userContext, methodName) { var RsltElem = document.getElementById("Results"); RsltElem.innerHTML = result + " from " + methodName + "."; alert("Msg received from service"); }

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  • WCF on Windows 7 not working

    - by Nyla Pareska
    I am using an example from iDesign about one way calls. I can get it to work on a Vista machine (VS2008) but not on a windows 7 machine (VS2010). I get this error: HTTP could not register URL http://+:8001/MyService/. Your process does not have access rights to this namespace ServiceHost host = new ServiceHost(typeof(MyService)); host.Open(); I get the error on the host.Open(); line. I noticed that windows asks first for some firewall and to give permission which I did but still it is not working. What can I do?

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  • WCF DTO versions

    - by cvista
    Hi I have some services at the moment that return a dto with the following fields: [DataMember] public int Id { get; set; } [DataMember] public string Name { get; set; } and I want to add more to this service by adding the following properties: [DataMember] public virtual DateTime StartDate { get; set; } I'm not in a position where i can update the consumers of these services though - the client does that themselves. My question is - will the old clients be able to just skip these new properties? and the new ones take advantage of them or will the serialization be an issue with the new properties? w://

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  • How can I filter the WCF Trace?

    - by Lawrence A. Contreras
    I need to get the following information during tracing: 1. I need to know how long an operation was executed. 2. I need to know if the operation(method in the service) is executed successfully. 3. I need to know if there's an error. I know that we can see all of that using the Service Trace Viewer, but is there a way that I can filter the information to the things mentioned above?

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  • Pros and cons of using JSON for WCF service

    - by brz dot net
    What are the pros and cons of the following 2 cases: Case I: Traditional way: Add service reference in project. Create object and Get data from service on server side and bind to asp.net grid. Case II: Update Service for JSON behavior. Add service reference in project. Call service from javascript to get data. Bind data to jquery grid. Which one is the best approach and why?(Not developer point of view) If there is another approach which is more optimized, please explain it.

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  • How to transfer objects through the header in WCF

    - by Michael
    I'm trying to transfer some user information in the header of the message through message inspectors. I have created a behavior which adds the inspector to the service (both client and server). But when I try to communicate with the service I get the following error: XmlException: Name cannot begin with the '<' character, hexadecimal value 0x3C. I have also get exception telling me that DataContracts where unexpected. Type 'System.DelegateSerializationHolder+DelegateEntry' with data contract name 'DelegateSerializationHolder.DelegateEntry:http://schemas.datacontract.org/2004/07/System' is not expected. Consider using a DataContractResolver or add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to DataContractSerializer. The thing is that my object contains other objects which are marked as DataContract and I'm not interested adding the KnownType attribute for those types. Another problem might be that my object to serialize is very restricted in form of internal class and internal properties etc. Can anyone guide me in the right direction. What I'm I doing wrong? Some code: public virtual object BeforeSendRequest(ref Message request, IClientChannel channel) { var header = MessageHeader.CreateHeader("<name>", "<namespace>", object); request.Headers.Add(header); return Guid.NewGuid(); }

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  • WCF method called twice

    - by Saurabh Lalwani
    Hi, I have a web service which is returning data to the desktop application. The problem I am having is, when the web service returns small volume of data everything works fine but when the volume of data is large it throws the following exception: System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive. And when I am debugging the web service, I see that this particular method is called twice. It executes the return statement 1st time nothing happens, but when it does execute it for the second time the above mentioned exception is thrown in the desktop app. I found similar posts before on stackoverflow but they did not solve my problem. Can anybody please tell me what's going on in here? Thanks!

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  • MaxReceivedMessageSize adjusted, but still getting the QuotaExceedException with WCF

    - by djerry
    Hey guys, First of all, i have read the "millions" of post on this site and some blogs/forum post on other websites, and no answer is solving my problem. I'm my app, there's a possibility to import a txt or csv file with data. In the case of the error, the file contains 444 rows (file is 14,5 kB). When i try to send it to the server to process it, i get an QuotaExceedException, telling me to increase MaxReceivedMessageSize. So i changed it to a much higher value, but i'm still getting the same exception. I'm using the same exact items for client and server in system.servicemodel in my config file. Config snippet : <system.serviceModel> <bindings> <netTcpBinding> <binding name="NetTcpBinding_IMonitoringSystemService" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" transactionFlow="false" transferMode="Buffered" transactionProtocol="OleTransactions" hostNameComparisonMode="StrongWildcard" listenBacklog="10" maxBufferPoolSize="2147483647" maxBufferSize="2147483647" maxConnections="500" maxReceivedMessageSize="2147483647"> <readerQuotas maxDepth="32" maxStringContentLength="100000" maxArrayLength="100000" maxBytesPerRead="100000" maxNameTableCharCount="100000" /> <reliableSession ordered="true" inactivityTimeout="00:10:00" enabled="false" /> <security mode="Message"> <transport clientCredentialType="Windows" protectionLevel="EncryptAndSign"> <extendedProtectionPolicy policyEnforcement="Never" /> </transport> <message clientCredentialType="Windows" /> </security> </binding> </netTcpBinding> </bindings> <client> <endpoint address="net.tcp://localhost:8000/Monitoring%20Server" binding="netTcpBinding" bindingConfiguration="NetTcpBinding_IMonitoringSystemService" contract="IMonitoringSystemService" > <!--name="NetTcpBinding_IMonitoringSystemService"--> <identity> <userPrincipalName value="DJERRYY\djerry" /> </identity> </endpoint> </client> </system.serviceModel> Can i use this sample for client and server config? And what should i not use in that case. Thanks in advance.

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  • WCF Transaction Scope SQL insert table lock

    - by lihnid
    Hi All, I have two services talking to two different Data-stores (i.e SQL). I am using transactionscope: eg: using(TransactionScope scope = new TransactionScope()) { service1.InsertUser(user);//Insert to SQL Service 1 table User service2.SavePayment(payment);//Save payment SQL Service 2 table payment scope.Complete(); } Service1 is locking the table (User) until the transaction is completed making subsequent transactions with that table sequential. Is there a way to overcome the lock, so can have more than one concurrent calls to the SQL service1 table while the above code is executing? I would appreciate any input. Thanks in Advance. Lihnid

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