C#调用导航Web服务而不添加Web引用

时间:2015-12-18 13:26:10

标签: c# web-services web-reference

我正在开发一个项目,要求我连接到Microsoft Dynamics NAV Web服务,并获取一些数据。但是,我们无法从开发环境访问此Web服务,因此我无法以通常的方式向项目添加Web引用。

有没有办法,通过提供URL,用户,密码和密码,在运行时“动态”连接到Web引用。域?然后创建动态对象,并调用Web服务的方法? (所以我会创建一个控制台应用程序,它只能在生产环境中运行,因为可以访问Web服务)

从我最初的研究中,我发现了一些方法,其中有一个函数,它返回对象类型的对象。我通常会遇到凭证问题:未经授权的访问(401)

顺便说一句,我对这些网络服务都很陌生......

方法我到目前为止一直在使用,没有任何运气:

internal static object CallWebService(string webServiceAsmxUrl, string serviceName, string methodName, object[] args)

    {
        System.Net.WebClient client = new System.Net.WebClient();
        CredentialCache cc = new CredentialCache();
        cc.Add(
            new Uri(webServiceAsmxUrl),
            "NTLM",
            new NetworkCredential("user", "password", "domain"));
        client.Credentials = cc;
        // Connect To the web service
        System.IO.Stream stream = client.OpenRead(webServiceAsmxUrl + "?wsdl");

        // Now read the WSDL file describing a service.
        ServiceDescription description = ServiceDescription.Read(stream);
        ///// LOAD THE DOM /////////

        // Initialize a service description importer.

        ServiceDescriptionImporter importer = new ServiceDescriptionImporter();

        importer.ProtocolName = "Soap12"; // Use SOAP 1.2.

        importer.AddServiceDescription(description, null, null);

        // Generate a proxy client.

        importer.Style = ServiceDescriptionImportStyle.Client;

        // Generate properties to represent primitive values.

        importer.CodeGenerationOptions = System.Xml.Serialization.CodeGenerationOptions.GenerateProperties;

        // Initialize a Code-DOM tree into which we will import the service.

        CodeNamespace nmspace = new CodeNamespace();

        CodeCompileUnit unit1 = new CodeCompileUnit();

        unit1.Namespaces.Add(nmspace);

        // Import the service into the Code-DOM tree. This creates proxy code that uses the service.

        ServiceDescriptionImportWarnings warning = importer.Import(nmspace, unit1);

        //THIS IS WHERE IT's NOT COMPLYING. warning will be "NoGeneratedCode"
        if (warning == 0) // If zero then we are good to go

        {

            // Generate the proxy code

            CodeDomProvider provider1 = CodeDomProvider.CreateProvider("CSharp");

            // Compile the assembly proxy with the appropriate references

            string[] assemblyReferences = new string[5] { "System.dll", "System.Web.Services.dll", "System.Web.dll", "System.Xml.dll", "System.Data.dll" };

            CompilerParameters parms = new CompilerParameters(assemblyReferences);

            CompilerResults results = provider1.CompileAssemblyFromDom(parms, unit1);

            // Check For Errors
            if (results.Errors.Count > 0)

            {

                foreach (CompilerError oops in results.Errors)

                {

                    System.Diagnostics.Debug.WriteLine("========Compiler error============");

                    System.Diagnostics.Debug.WriteLine(oops.ErrorText);

                }

                throw new System.Exception("Compile Error Occured calling webservice. Check Debug ouput window.");

            }

            // Finally, Invoke the web service method

            object wsvcClass = results.CompiledAssembly.CreateInstance(serviceName);

            MethodInfo mi = wsvcClass.GetType().GetMethod(methodName);

            return mi.Invoke(wsvcClass, args);

        }

        else

        {

            return null;

        }

    }

它总是返回null。

2 个答案:

答案 0 :(得分:0)

是Web服务(或)是WCF服务吗?如果它是WCF服务,那么您可以使用<div class='widgetbox'> <form method='POST' action=''> 来访问该服务。如果它是一个Web服务,那么您可以从任何Web浏览器访问该服务,前提是您知道如下所示的WSDL文件名

SvcUtil.exe

(OR)

http://servername/apppath/webservicename.asmx

有关详细信息,请参阅此Documentation

答案 1 :(得分:0)

我知道这是一个老帖子,但我偶然发现了同样的问题。我通过改变

来修复它
TMyRec = record Val: integer; Bt: byte; It: cardinal; end;

importer.ProtocolName = "Soap12"; // Use SOAP 1.2.

ProtocolName的允许值为:

  • “肥皂”
  • “Soap12”
  • “HttpPost”
  • “HttpGet”
  • “HttpSoap”

根据documentation

希望能帮助遇到类似问题的人!