使用MEX客户端消费WSDL时CodeDom编译遇CS0246错误求助

尝试使用MEX客户端消费WSDL，期望无需引用即可编译并使用，但遇到编译器错误：CS0246: 找不到类型或命名空间名称'schema'。

导入契约的代码 #

MetadataExchangeClient mexClient = new MetadataExchangeClient(binding);

mexClient.ResolveMetadataReferences = true;
mexClient.MaximumResolvedReferences = 1000;
var metaSet = mexClient.GetMetadata(mexAddress, mexMode);

WsdlImporter importer = new WsdlImporter(metaSet);
result.ContractDescriptions = importer.ImportAllContracts();
result.AllEndpoints = importer.ImportAllEndpoints();

生成并编译代码的逻辑 #

CodeCompileUnit unit = (CodeCompileUnit)importer.State[typeof(CodeCompileUnit)];
ServiceContractGenerator generator = new ServiceContractGenerator(unit);

foreach (ContractDescription contract in result.ContractDescriptions)
{
  generator.GenerateServiceContractType(contract);
}

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

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

 CompilerParameters compilerParameters = new CompilerParameters(new string[] { 
    "System.dll", 
    "System.Data.dll", 
    "System.ServiceModel.dll", 
    "System.Runtime.Serialization.dll", 
    "System.Xml.dll", 
    "System.Xml.Linq.dll", 
    "System.Xml.Serialization.dll" });

  compilerParameters.GenerateInMemory = true;
  compilerParameters.GenerateExecutable = false;
  compilerParameters.WarningLevel = 1;
  compilerParameters.TempFiles = new TempFileCollection("Compile", true);

  results = codeDomProvider.CompileAssemblyFromDom(compilerParameters, generator.TargetCompileUnit);
}

生成代码中的错误点 #

编译后查看生成的代码，发现TestDS类中出现了未定义的schema类型：

/// <remarks/>
[System.CodeDom.Compiler.GeneratedCodeAttribute("BfusTester", "1.0.0.0")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType=true,     Namespace="http://www.logica.com/BusinessForUtilities/2012/LoggerService")]
public partial class TestDS {
    
        private schema schemaField;
    
        private System.Xml.XmlElement anyField;
    
        /// <remarks/>
        [System.Xml.Serialization.XmlElementAttribute(Namespace="http://www.w3.org/2001/XMLSchema",     Order=0)]
        public schema schema {
            get {
                return this.schemaField;
            }
            set {
                this.schemaField = value;
            }
        }
    
        /// <remarks/>
        [System.Xml.Serialization.XmlAnyElementAttribute(Order=1)]
        public System.Xml.XmlElement Any {
            get {
                return this.anyField;
            }
            set {
                this.anyField = value;
            }
        }
    }

服务端对应代码（无法修改） #

该方法对应服务端的标准System.Data.DataSet接口与实现：

接口代码 #

[OperationContract]
DataSet Test(DataSet ds);

实现代码 #

public DataSet Test(DataSet ds)
{
  return new DataSet();
}

WSDL中的关键细节 #

引发问题的DataSet方法在WSDL中使用了"literal"类型：

<wsdl:operation name="Test2">
        <soap12:operation soapAction="http://www.logica.com/BusinessForUtilities/2012/LoggerService/ILoggerService/Test2" style="document"/>
        <wsdl:input>
            <soap12:body use="literal"/>
        </wsdl:input>
        <wsdl:output>
            <soap12:body use="literal"/>
        </wsdl:output>
    </wsdl:operation>

需求推测与求助 #

推测需要指定WsdlImporter或ServiceContractGenerator查找DataSet类型的位置，但不知具体操作方式，恳请提供解决方案。

内容的提问来源于stack exchange，提问作者Pierre Lundgren