通过反射在WCF中设置超时

Question

我需要设置一个暂停，当我消耗wcf。

例外：类型为" system.nullReferenceException"的例外，变量属性ins为null。我无法获得代理类型的属性超时。

我有以下代码，设置值时会出现错误。（我用硬编码为" 1000"）

private object GetWCFInstance(ref CompilerResults compilerResults, string WCFAddress, string contractName)
    {
        object proxyInstance = null;
        // Define the WSDL Get address, contract name and parameters, with this we can extract WSDL details any time
        Uri address = new Uri(WCFAddress);
        // For HttpGet endpoints use a Service WSDL address a mexMode of .HttpGet and for MEX endpoints use a MEX address and a mexMode of .MetadataExchange
        MetadataExchangeClientMode mexMode = MetadataExchangeClientMode.HttpGet;
        //string contractName = "IService1";
        // Get the metadata file from the service.
        MetadataExchangeClient metadataExchangeClient = new MetadataExchangeClient(address, mexMode);
        metadataExchangeClient.ResolveMetadataReferences = true;
        //One can also provide credentials if service needs that by the help following two lines.
        //ICredentials networkCredential = new NetworkCredential("", "", "");
        //metadataExchangeClient.HttpCredentials = networkCredential;
        //Gets the meta data information of the service.
        MetadataSet metadataSet = metadataExchangeClient.GetMetadata();
        // Import all contracts and endpoints.
        WsdlImporter wsdlImporter = new WsdlImporter(metadataSet);
        //Import all contracts.
        Collection<ContractDescription> contracts = wsdlImporter.ImportAllContracts();
        //Import all end points.
        ServiceEndpointCollection allEndpoints = wsdlImporter.ImportAllEndpoints();
        // Generate type information for each contract.
        ServiceContractGenerator serviceContractGenerator = new ServiceContractGenerator();
        //Dictinary has been defined to keep all the contract endpoints present, contract name is key of the dictionary item.
        var endpointsForContracts = new Dictionary<string, IEnumerable<ServiceEndpoint>>();
        foreach (ContractDescription contract in contracts)
        {
            serviceContractGenerator.GenerateServiceContractType(contract);
            // Keep a list of each contract's endpoints.
            endpointsForContracts[contract.Name] = allEndpoints.Where(ep => ep.Contract.Name == contract.Name).ToList();
        }
        // Generate a code file for the contracts.
        CodeGeneratorOptions codeGeneratorOptions = new CodeGeneratorOptions();
        codeGeneratorOptions.BracingStyle = "C";
        // Create Compiler instance of a specified language.
        CodeDomProvider codeDomProvider = CodeDomProvider.CreateProvider("C#");
        // Adding WCF-related assemblies references as copiler parameters, so as to do the compilation of particular service contract.
        CompilerParameters compilerParameters = new CompilerParameters(new string[] { "System.dll", "System.ServiceModel.dll", "System.Runtime.Serialization.dll" });
        compilerParameters.GenerateInMemory = true;
        //Gets the compiled assembly.
        compilerResults = codeDomProvider.CompileAssemblyFromDom(compilerParameters, serviceContractGenerator.TargetCompileUnit);
        if (compilerResults.Errors.Count <= 0)
        {
            // Find the proxy type that was generated for the specified contract (identified by a class that implements the contract and ICommunicationbject - this is contract
            //implemented by all the communication oriented objects).
            Type proxyType = compilerResults.CompiledAssembly.GetTypes().First(t => t.IsClass && t.GetInterface(contractName) != null &&
                t.GetInterface(typeof(ICommunicationObject).Name) != null);
            // Now we get the first service endpoint for the particular contract.
            ServiceEndpoint serviceEndpoint = endpointsForContracts[contractName].First();
            // Create an instance of the proxy by passing the endpoint binding and address as parameters.
            proxyInstance = compilerResults.CompiledAssembly.CreateInstance(proxyType.Name, false, System.Reflection.BindingFlags.CreateInstance, null,
                new object[] { serviceEndpoint.Binding, serviceEndpoint.Address }, System.Globalization.CultureInfo.CurrentCulture, null);
            System.Reflection.PropertyInfo propertyInfo = proxyType.GetProperty("Timeout");
            **propertyInfo.SetValue(proxyInstance, 1000, null);**
            object check = propertyInfo.GetValue(proxyInstance, null);
        }
        return proxyInstance;
    }                

谢谢

Answer 1

最后，我可以解决此问题，我在app.config中不需要任何内容，wef.config配置了相同的代码，并将此行放入客户端。

我只需要施放通道，然后施放basichtpbinding并设置参数。

谢谢大家。

            var timeOut=new TimeSpan(0, 10, 0);
            int timeOutInt = 2147483647;
            PropertyInfo channelFactoryProperty = proxyInstance.GetType().GetProperty("ChannelFactory");
        if (channelFactoryProperty == null)
        {
            throw new InvalidOperationException("There is no ''ChannelFactory'' property on the DomainClient.");
        }
        ChannelFactory factory = (ChannelFactory)channelFactoryProperty.GetValue(proxyInstance, null);
        factory.Endpoint.Binding.SendTimeout = timeOut;
        factory.Endpoint.Binding.OpenTimeout =  timeOut;
        factory.Endpoint.Binding.ReceiveTimeout = timeOut;
        factory.Endpoint.Binding.CloseTimeout = timeOut;
        BasicHttpBinding _binding = (BasicHttpBinding)factory.Endpoint.Binding;
        _binding.MaxBufferPoolSize = timeOutInt;
        _binding.MaxBufferSize = timeOutInt;
        _binding.MaxReceivedMessageSize = timeOutInt;
        _binding.OpenTimeout = timeOut;