c# - ServiceContractGenerator CodeDomProvider 编译错误

Question

我正在尝试使用 ServiceCodeGenerator 和 CodeDomProvider 动态创建服务引用。使用 CodeDomProvider 编译代码时会抛出以下错误。

看起来它只适用于特定的网络服务。我能够编译其他 Web 服务，但是这个会抛出下面的编译错误。

知道如何编辑源代码或忽略错误吗？

CS0579: Duplicate 'System.CodeDom.Compiler.GeneratedCodeAttribute' attribute 99 CS0579: Duplicate 'System.Diagnostics.DebuggerStepThroughAttribute' attribute 101 CS0579: Duplicate 'System.CodeDom.Compiler.GeneratedCodeAttribute' attribute 191 CS0579: Duplicate 'System.Diagnostics.DebuggerStepThroughAttribute' attribute 193

代码如下:

Uri address = new Uri(url + "?wsdl");
        MetadataExchangeClientMode mexMode = MetadataExchangeClientMode.HttpGet;
        MetadataExchangeClient metadataExchangeClient = new MetadataExchangeClient(address, mexMode);
        metadataExchangeClient.ResolveMetadataReferences = true;

        //Trust all certificates
        System.Net.ServicePointManager.ServerCertificateValidationCallback = ((sender, certificate, chain, sslPolicyErrors) => true);
        ICredentials networkCredential = new NetworkCredential("username", "password", "domain");
        metadataExchangeClient.HttpCredentials = networkCredential;

        MetadataSet metadataSet = metadataExchangeClient.GetMetadata();
        WsdlImporter wsdlImporter = new WsdlImporter(metadataSet);
        Collection<ContractDescription> contracts = wsdlImporter.ImportAllContracts();
        ServiceEndpointCollection allEndpoints = wsdlImporter.ImportAllEndpoints();

        ServiceContractGenerator serviceContractGenerator = new ServiceContractGenerator();
        foreach (ContractDescription contract in contracts)
        {
            serviceContractGenerator.GenerateServiceContractType(contract);
        }

        // Generate a code file for the contracts.
        CodeGeneratorOptions codeGeneratorOptions = new CodeGeneratorOptions();
        codeGeneratorOptions.BracingStyle = "C";

        // Create Compiler instance of a specified language.
        CompilerResults compilerResults;
        using (CodeDomProvider codeDomProvider = CodeDomProvider.CreateProvider("CSharp"))
        {

            // 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;
            compilerParameters.WarningLevel = 1;

            compilerResults = codeDomProvider.CompileAssemblyFromDom(compilerParameters, serviceContractGenerator.TargetCompileUnit);
        }

        if (compilerResults.Errors.Count <= 0)
        {
            assembly = compilerResults.CompiledAssembly;
        }
        else
        {
            foreach (CompilerError error in compilerResults.Errors)
            {
                Console.WriteLine(error.ErrorNumber + ": " + error.ErrorText + " " + error.IsWarning + " " + error.Line);
            }

            throw new Exception("Compiler Errors - unable to build Web Service Assembly");
        }           

Answer 1

问题是生成器使用了它自己的 CodeCompileUnit，并生成了同名的类。需要强制使用WsdlImporter使用的CodeCompileUnit，例如(花了一天时间搞清楚):

Collection<ContractDescription> contracts = importerWsdl.ImportAllContracts();
ServiceEndpointCollection allEndpoints = importerWsdl.ImportAllEndpoints();
CodeCompileUnit unit = (CodeCompileUnit) importerWsdl.State[typeof (CodeCompileUnit)];
ServiceContractGenerator generator = new ServiceContractGenerator(unit);

现在我们有了一个完整的“添加服务引用”