I have a requirement to call a dll (unmanaged c) from a .NET web service (asmx or WCF). Calling the dll from the web service is straightforward and works as expected. However, issues emerge when I load test the web service. (error code 0xC0000374 - "an internal error, typically involving heap corruption”). I've been informed by the o...
Hi, I've got a WCF service using a HttpBinding. The service is running in a self hosting process (A Windows Service) and this process is inside the Windows Firewall exceptions list. If the Firewall is active and I'm trying to access the service using a C# client or Internet Explorer, the service does not respond. But if the Firewall is...
I was wondering if it was better in WCF to use multiple operation contracts or to have only one operation contract with a polymorphic data contract. Let me give you a small example : [OperationContract] action1Answer action1(action1data a); [OperationContract] action2Answer action2(action2data a); or [OperationContract] actionAnswe...
Hi all, I am hosting my own WCF service in a web site through configuration. I need to use Sessions so the server will not get clogged with inactive clients. So I want to use reliable messaging, but an exception gets throw on the actual service call: ActionNotSupportedException: The action http://tempuri.org/IApiService/Authenticate is...
We have a bunch of WCF services that work almost all of the time, using various bindings, ports, max sizes, etc. The super-frustrating thing about WCF is that when it (rarely) fails, we are powerless to find out why it failed. Sometimes you will get a message that looks like this: System.ServiceModel.CommunicationException: The soc...
I have a Silverlight application that consists of a MainWindow and several classes which update and draw images on the MainWindow. I'm now expanding this to keep track of everything in a database. Without going into specifics, lets say I have a structure like this: MainWindow Drawing-Surface Class1 -- Supports Drawing DataC...
Hi, We are in the conceptual phase to create a relatively medium size enterprise business product application using Silver light 4.0, Entity Framework and WCF. 1. Is it adivceable to use Silverlight 4.0 for this enterprise business application development or should we go in for MVC.NET / ASP.NET? 2. We have planned to use REST based WCF...
Hello, We have a program calling xaml service via channel factory. The problem occurs when we try to call the service multiple times. The error is : The open operation did not complete within the allotted timeout of 00:00:30. The time allotted to this operation may have been a portion of a longer timeout. In xaml service web.config...
I am implementing a WCF service, with a Silverlight 3 client, which uses a PollingDuplexHttpBinding for communications. What are the alternatives for handling when a client closes their browser without disconnecting from the server first? I know that it will eventually throw a TimeoutException, which I can catch, but is there a better ...
I am overriding System.IdentityModel.Policy.IAuthorizationPolicy.Evaluate as follows: public bool Evaluate(EvaluationContext evaluationContext,ref object state) { var ids = (IList<IIdentity>)evaluationContext.Properties["Identities"]; var userName = ids[0].Name; // look up "userName" in a database to check for app. permissi...
I have multiple SQL Server databases with the same schema. I would like to use one WCF data service (Rest service) to access the different databases. How can I accomplish this so the client can pass in the correct database name or connection string? ...
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 ServiceE...
I've got a central SQL server database. My solution has a WCF service responsible for synchronizing data with clients running SQL Server or SQL Server Express. The service uses Microsoft Sync Framework and it works well, but the Sync Framework requires a direct connection to my client's server, and clients that are running SQL Server Ex...
Is it possible to configure a WCF service to use sessions, and also not to require the client to send any credentials? If so, how should the bindings section of the service's App.config file look? ...
Hi, I have a service that implements the following DataMember: [DataMember] public Dictionary<string, List<IOptionQueryResult>> QueryResultItems { get; set; } I have the class "OptionQuerySingleResult" which inherits from IOptionQueryResult. Now, I understand that I need to make the OptionQueryResult type "known" to the Service and t...
I need to create a RESTful webservice in C#. This is what I have right now: namespace WebService { [ServiceContract] public interface IService { [OperationContract(Name="Add")] [WebGet(UriTemplate = "/")] int Add(); } public class Service:IService { public int Add() { // d...
I want inject a implementation of my Interface in the WCF but I want initialize my container of Dependency Injection in the Client of the WCF. So I can have a different implementation for each client of the my service. Help me please. ...
I've created a WCF service in which I would like it to maintain state between calls from the client. I figured the easiest way to do this was to add this attribute to the service: [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession)] since this is supposed to keep a separate service alive for each client over the li...
I have a WCF Web Service with a custom username/password validator. How does one specify the username and password as the ClientCredentials properties when creating a service in Silverlight are read-only? Thanks for any help. ...
I'm a newb to WCF bindings and would greatly appreciate if someone could give me an example of a custom binding using Binary message encoding with Transport security (clientCredentialType="None"). Thanks in advance. ...