c#之在运行时动态调用 Web 服务

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; 
} 

请您参考如下方法:

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