c# - 在运行时动态调用 Web 服务

Question

我的代码允许我在运行时针对给定的 URL、服务名称、方法名称和参数动态调用 Web 服务。当我尝试编译的 WSDL 包含 <import namespace="..." location="..."/> 时，问题就来了标签。它抛出以下错误:

Service Description with namespace ... is missing

大概我需要先从导入标签编译引用的 WSDL。我应该如何考虑引用的 WSDL 也可以引用另一个 WSDL？以下是我正在使用的代码。

public static object CallWebService(string url, string serviceName, string methodName, string userName, string password, ServiceDescription wsdl, ILogger logger, object[] args)
{
            var client = new WebClient();
            if (userName.Length > 0)
            {
                client.Credentials = new NetworkCredential(userName, password);
            }

            var stream = client.OpenRead(url + "?wsdl");
            if (stream != null)
            {
                var description = ServiceDescription.Read(stream);
                wsdl = description;

                var importer = new ServiceDescriptionImporter
                    {
                        ProtocolName = "Soap12",
                        Style = ServiceDescriptionImportStyle.Client,
                        CodeGenerationOptions = CodeGenerationOptions.GenerateProperties
                    };
                importer.AddServiceDescription(wsdl, null, null);

                var nameSpace = new CodeNamespace();
                var unit = new CodeCompileUnit();
                unit.Namespaces.Add(nameSpace);

                **var warning = importer.Import(nameSpace, unit);** // Error occurs here
                if (warning == 0)
                {
                    var provider = CodeDomProvider.CreateProvider("CSharp");
                    var assemblyReferences = new[] { "System.dll", "System.Web.Services.dll", "System.Web.dll", "System.Xml.dll", "System.Data.dll" };
                    var parameters = new CompilerParameters(assemblyReferences);
                    var results = provider.CompileAssemblyFromDom(parameters, unit);

                    if (results.Errors.Count > 0)
                    {
                        logger.Info("Compiler errors: " + results.Errors.Count);
                        foreach (var error in results.Errors)
                        {
                            logger.Info(error.ToString());
                        }

                        throw new Exception("Compile Error Occured calling webservice.");
                    }

                    var service = results.CompiledAssembly.CreateInstance(serviceName);
                    if (service != null)
                    {
                        var methods = service.GetType().GetMethods();
                        var method = service.GetType().GetMethod(methodName);
                        if (method == null)
                        {
                            var message = "Method: " + methodName + " is invalid. Valid Methods are: ";
                            message = methods.Aggregate(message, (current, methodInfo) => current + methodInfo.Name + "; ");
                            throw new Exception(message);
                        }

                        return method.Invoke(service, args);
                    }

                    logger.Info("Service invocation error. ServiceName provided: " + serviceName);
                    return null;
                }

                return null;
            }

            return null;
}

Answer 1

也许有点晚了，但对于谷歌搜索者来说还不错。您必须展平您的 xsd 文件。解析它们并寻找导入部分。获取此导入部分并添加在导入位置路径中找到的文件。这应该让你开始: http://arstechnica.com/civis/viewtopic.php?f=20&t=180943