消费，并在运行时调用SOAP Web服务 - 从WSDL文件中的动态Web服务客户端

问题描述

限时删除！！

要求：

1. 客户给SOAP的Web服务的WSDL在运行时即挑选从文件共享位置的WSDL文件。


2. 消费WSDL，并调用由客户在用户界面上选择的方法和处理响应。

我不能使用MetadataExchangeClient作为WSDL将不会被托管。

实施

  VAR serviceDescription = ServiceDescription.Read（@C：\\ Contacts.WSDL）;
VAR metadataSection =新MetadataSection
{
方言= MetadataSection.ServiceDescriptionDialect，
标识符= serviceDescription.TargetNamespace，
元数据= serviceDescription
};VAR metadataSections =新的List＆LT; MetadataSection＆GT; {} metadataSection;
VAR metadatSet =新MetadataSet（metadataSections）;
VAR wsdlImporter =新WsdlImporter（metadatSet）;
VAR的服务= wsdlImporter.ImportAllEndpoints（）;
 

路障：

1. 上面code都无法提取服务端点。所以，我不得不手动创建一个服务端点。


2. 我无法列出包含在以上WSDL中的所有方法和其相关的输入/输出在步骤（将在变量operationName及以下operationParameters使用）

I tried by hard coding the operation name, manually parsed from the WSDL, but then it failed at the parameters. It's expecting a complex type containing the hierarchy as below :

Next Steps:

If someone could help me fix the roadblocks, then I can proceed with the above approach.

Else, I have to start researching on using the svcutil.exe at runtime

Thanks,Dev

解决方案

There is a solution for doing this described in this article:

Generate proxy code for a web service dynamically

Although you can open that link and read it, I include the code here, just in case that link dies anytime:

public string[] GenerateProxyAssembly()
{
  //create a WebRequest object and fetch the WSDL file for the web service
  HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(this.uri);
  request.Credentials = CredentialCache.DefaultCredentials;
  HttpWebResponse response = (HttpWebResponse)request.GetResponse();
  System.IO.Stream stream = response.GetResponseStream();

  //read the downloaded WSDL file
  ServiceDescription desc = ServiceDescription.Read(stream);

  //find out the number of operations exposed by the web service
  //store the name of the operations inside the string array
  //iterating only through the first binding exposed as
  //the rest of the bindings will have the same number
  int i = 0;
  Binding binding = desc.Bindings[0];
  OperationBindingCollection opColl = binding.Operations;
  foreach (OperationBinding operation in opColl)
  {
    listOfOperations[i++] = operation.Name;
  }

  //initializing a ServiceDescriptionImporter object
  ServiceDescriptionImporter importer = new ServiceDescriptionImporter();

  //set the protocol to SOAP 1.1
  importer.ProtocolName = "Soap12";

  //setting the Style to Client in order to generate client proxy code
  importer.Style = ServiceDescriptionImportStyle.Client;

  //adding the ServiceDescription to the Importer object
  importer.AddServiceDescription(desc, null, null);
  importer.CodeGenerationOptions = CodeGenerationOptions.GenerateNewAsync;

  //Initialize the CODE DOM tree in which we will import the
  //ServiceDescriptionImporter
  CodeNamespace nm = new CodeNamespace();
  CodeCompileUnit unit = new CodeCompileUnit();
  unit.Namespaces.Add(nm);

  //generating the client proxy code
  ServiceDescriptionImportWarnings warnings = importer.Import(nm, unit);

  if (warnings == 0)
  {
    //set the CodeDOMProvider to C# to generate the code in C#
    System.IO.StringWriter sw = new System.IO.StringWriter();
    CodeDomProvider provider = CodeDomProvider.CreateProvider("C#");
    provider.GenerateCodeFromCompileUnit(unit, sw, new CodeGeneratorOptions());

    //creating TempFileCollection
    //the path of the temp folder is hardcoded
    TempFileCollection coll = new TempFileCollection(@"C:\wmpub\tempFiles");
    coll.KeepFiles = false;

    //setting the CompilerParameters for the temporary assembly
    string[] refAssembly = { "System.dll", "System.Data.dll",
      "System.Web.Services.dll", "System.Xml.dll" };
    CompilerParameters param = new CompilerParameters(refAssembly);
    param.GenerateInMemory = true;
    param.TreatWarningsAsErrors = false;
    param.OutputAssembly = "WebServiceReflector.dll";
    param.TempFiles = coll;

    //compile the generated code into an assembly
    //CompilerResults results = provider.CompileAssemblyFromDom(param, unitArr);
    CompilerResults results
       = provider.CompileAssemblyFromSource(param, sw.ToString());
    this.assem = results.CompiledAssembly;
  }

  //return the list of operations exposed by the web service
  return listOfOperations;
}

public ParameterInfo[] ReturnInputParameters(string methodName)
{
  //create an instance of the web service type
  //////////////to do/////////////////////////
  //get the name of the web service dynamically from the wsdl
  Object o = this.assem.CreateInstance("Service");
  Type service = o.GetType();
  ParameterInfo[] paramArr = null;

  //get the list of all public methods available in the generated //assembly
  MethodInfo[] infoArr = service.GetMethods();

  foreach (MethodInfo info in infoArr)
  {
  //get the input parameter information for the
  //required web method
    if (methodName.Equals(info.Name))
    {
      paramArr = info.GetParameters();
    }
  }

  return paramArr;
}

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