Web 引用调用返回带有 null 字段的对象

Question

我知道这是一个重复出现的问题。但我在过去两天用谷歌搜索，但仍然找不到我的问题的解决方案。流行的答案与名称空间相关，但它仍然对我没有帮助。

好的，所以我的 wsdl 是：

<?xml version="1.0" encoding="UTF-8"?>
<!-- WSDL for http://daac.ornl.gov/cgi-bin/MODIS/GLBVIZ_1_Glb_subset/MODIS_webservice.pl created by Pod::WSDL version: 0.04 on Mon May 24 15:41:43 2010 -->
<wsdl:definitions targetNamespace="http://daac.ornl.gov/MODIS_webservice" 
              xmlns:impl="http://daac.ornl.gov/MODIS_webservice" 
              xmlns:wsdlsoap="http://schemas.xmlsoap.org/wsdl/soap/" 
              xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" 
              xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" 
              xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
              xmlns:tns1="http://daac.ornl.gov/MODIS_webservice">

<wsdl:types>
    <schema targetNamespace="http://daac.ornl.gov/MODIS_webservice" xmlns="http://www.w3.org/2001/XMLSchema">
        <import namespace="http://schemas.xmlsoap.org/soap/encoding/" />
        <complexType name="ArrayOfString">
            <complexContent>
                <restriction base="soapenc:Array">
                    <attribute ref="soapenc:arrayType" wsdl:arrayType="soapenc:string[]" />
                </restriction>
            </complexContent>
        </complexType>
        <complexType name="ModisData">
            <sequence>
                <element name="xllcorner" nillable="true" type="xsd:float">
                    <annotation>
                        <documentation>
                        X-Longitude of the corner of lower left pixel in Sinusoidal projection
                        </documentation>
                    </annotation>
                </element>
                <element name="yllcorner" nillable="true" type="xsd:float">
                    <annotation>
                <documentation>
                Y-Latitude of the corner of lower left pixel in Sinusoidal projection
                </documentation>
                    </annotation>
                </element>
                <element name="cellsize" nillable="true" type="xsd:float">
                    <annotation>
                <documentation>Resolution of the data</documentation>
                    </annotation>
                </element>
                <element name="nrows" nillable="true" type="xsd:float">
                    <annotation>
                <documentation>Number of rows</documentation>
                    </annotation>
                </element>
                <element name="ncols" nillable="true" type="xsd:float">
                    <annotation>
                <documentation>Number of rows</documentation>
                    </annotation>
                </element>
                <element name="band" nillable="true" type="xsd:string">
                    <annotation>
                        <documentation>Band Name</documentation>
                    </annotation>
                </element>
                <element name="units" nillable="true" type="xsd:string">
                    <annotation>
                        <documentation>Units for the band</documentation>
                    </annotation>
                </element>
                <element name="scale" nillable="true" type="xsd:float">
                    <annotation>
                        <documentation>scale of the data values</documentation>
                    </annotation>
                </element>
                <element name="latitude" nillable="true" type="xsd:float">
                    <annotation>
                        <documentation>Latitude in degrees of the subset location</documentation>
                    </annotation>
                </element>
                <element name="longitude" nillable="true" type="xsd:float">
                    <annotation>
                        <documentation>Longitude in degrees of the subset location</documentation>
                    </annotation>
                </element>
                <element name="header" nillable="true" type="xsd:string">
                    <annotation>
                        <documentation>Header for the Subset returned</documentation>
                    </annotation>
                </element>
                <element name="subset" nillable="true" type="tns1:ArrayOfString">
                    <annotation>
                        <documentation>Subset data</documentation>
                    </annotation>
                </element>
            </sequence>
        </complexType>
    </schema>
</wsdl:types>

<wsdl:message name="getproductsRequest">
</wsdl:message>

<wsdl:message name="getproductsResponse">
    <wsdl:part name="getproductsReturn" type="tns1:ArrayOfString">
        <wsdl:documentation>This returns the list of products available. Product shortname is used.</wsdl:documentation>
    </wsdl:part>
</wsdl:message>

<wsdl:message name="getbandsRequest">
    <wsdl:part name="Product" type="xsd:string">
        <wsdl:documentation>MODIS Product Shortname</wsdl:documentation>
    </wsdl:part>
</wsdl:message>

<wsdl:message name="getbandsResponse">
    <wsdl:part name="getbandsReturn" type="tns1:ArrayOfString">
        <wsdl:documentation>This returns the list of bands available for a product</wsdl:documentation>
    </wsdl:part>
</wsdl:message>

<wsdl:message name="getdatesRequest">
    <wsdl:part name="Latitude" type="xsd:float">
        <wsdl:documentation>Latitude in geographic Lat/Long WGS 84 coordinate system</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="Longitude" type="xsd:float">
        <wsdl:documentation>Longitude in geographic Lat/Long WGS 84 coordinate system</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="Product" type="xsd:string">
        <wsdl:documentation>MODIS Product Shortname</wsdl:documentation>
    </wsdl:part>
</wsdl:message>

<wsdl:message name="getdatesResponse">
    <wsdl:part name="getdatesReturn" type="tns1:ArrayOfString">
        <wsdl:documentation>This returns the list of composite dates available for the product,Latitude,Longitude combination</wsdl:documentation>
    </wsdl:part>
</wsdl:message>

<wsdl:message name="getsubsetRequest">
    <wsdl:part name="Latitude" type="xsd:float">
        <wsdl:documentation>Latitude in geographic Lat/Long WGS 84 coordinate system</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="Longitude" type="xsd:float">
        <wsdl:documentation>Longitude in geographic Lat/Long WGS 84 coordinate system</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="Product" type="xsd:string">
        <wsdl:documentation>MODIS Product Shortname</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="Band" type="xsd:string">
        <wsdl:documentation>Enter the band you want to retreive. Enter all to get all bands.</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="MODIS_Subset_Start_Date" type="xsd:string">
        <wsdl:documentation>MODIS Composite Date Start of the Subset period</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="MODIS_Subset_End_Date" type="xsd:string">
        <wsdl:documentation>MODIS Composite Date End of the Subset period</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="Km_Above_Below" type="xsd:string">
        <wsdl:documentation>Size in km of the subset above and below the center location</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="Km_Left_Right" type="xsd:string">
        <wsdl:documentation>Size in km of the subset left and right the center location</wsdl:documentation>
    </wsdl:part>
</wsdl:message>

<wsdl:message name="getsubsetResponse">
    <wsdl:part name="getsubsetReturn" type="tns1:ModisData">
        <wsdl:documentation>This returns the subset for the location,product and date combination and detailed projection information.</wsdl:documentation>
    </wsdl:part>
</wsdl:message>

<wsdl:message name="getsubsetorderRequest">
    <wsdl:part name="Latitude" type="xsd:float">
        <wsdl:documentation>Latitude in geographic Lat/Long WGS 84 coordinate system</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="Longitude" type="xsd:float">
        <wsdl:documentation>Longitude in geographic Lat/Long WGS 84 coordinate system</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="Product" type="xsd:string">
        <wsdl:documentation>MODIS Product Shortname</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="Email" type="xsd:string">
        <wsdl:documentation>Enter the email address to which you want to receive the order</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="UID" type="xsd:string">
        <wsdl:documentation>Unique tag for the order</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="MODIS_Subset_Start_Date" type="xsd:string">
        <wsdl:documentation>MODIS Composite Date Start of the Subset period</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="MODIS_Subset_End_Date" type="xsd:string">
        <wsdl:documentation>MODIS Composite Date End of the Subset period</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="Km_Above_Below" type="xsd:string">
        <wsdl:documentation>Size in km of the subset above and below the center location</wsdl:documentation>
    </wsdl:part>
    <wsdl:part name="Km_Left_Right" type="xsd:string">
        <wsdl:documentation>Size in km of the subset left and right the center location</wsdl:documentation>
    </wsdl:part>
</wsdl:message>

<wsdl:message name="getsubsetorderResponse">
    <wsdl:part name="getsubsetorderReturn" type="xsd:string">
        <wsdl:documentation>This returns the order ID for the subset ID. An email with a link to the subset order would be dispatched to the email address provided.</wsdl:documentation>
    </wsdl:part>
</wsdl:message>

<wsdl:portType name="myServiceHandler">
    <wsdl:operation name="getproducts" parameterOrder="">
        <wsdl:input message="impl:getproductsRequest" name="getproductsRequest" />
        <wsdl:output message="impl:getproductsResponse" name="getproductsResponse" />
    </wsdl:operation>

    <wsdl:operation name="getbands" parameterOrder="Product">
        <wsdl:input message="impl:getbandsRequest" name="getbandsRequest" />
        <wsdl:output message="impl:getbandsResponse" name="getbandsResponse" />
    </wsdl:operation>

    <wsdl:operation name="getdates" parameterOrder="Latitude Longitude Product">
        <wsdl:input message="impl:getdatesRequest" name="getdatesRequest" />
        <wsdl:output message="impl:getdatesResponse" name="getdatesResponse" />
    </wsdl:operation>

    <wsdl:operation name="getsubset" parameterOrder="Latitude Longitude Product Band MODIS_Subset_Start_Date MODIS_Subset_End_Date Km_Above_Below Km_Left_Right">
        <wsdl:input message="impl:getsubsetRequest" name="getsubsetRequest" />
        <wsdl:output message="impl:getsubsetResponse" name="getsubsetResponse" />
    </wsdl:operation>

    <wsdl:operation name="getsubsetorder" parameterOrder="Latitude Longitude Product Email UID MODIS_Subset_Start_Date MODIS_Subset_End_Date Km_Above_Below Km_Left_Right">
        <wsdl:input message="impl:getsubsetorderRequest" name="getsubsetorderRequest" />
        <wsdl:output message="impl:getsubsetorderResponse" name="getsubsetorderResponse" />
    </wsdl:operation>

</wsdl:portType>

<wsdl:binding name="myServiceSoapBinding" type="impl:myServiceHandler">
    <wsdlsoap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http" />

    <wsdl:operation name="getproducts">
        <wsdlsoap:operation soapAction="" />
        <wsdl:input name="getproductsRequest">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://daac.ornl.gov/MODIS_webservice" use="encoded" />
        </wsdl:input>
        <wsdl:output name="getproductsResponse">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://daac.ornl.gov/MODIS_webservice" use="encoded" />
        </wsdl:output>
    </wsdl:operation>

    <wsdl:operation name="getbands">
        <wsdlsoap:operation soapAction="" />
        <wsdl:input name="getbandsRequest">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://daac.ornl.gov/MODIS_webservice" use="encoded" />
        </wsdl:input>
        <wsdl:output name="getbandsResponse">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://daac.ornl.gov/MODIS_webservice" use="encoded" />
        </wsdl:output>
    </wsdl:operation>

    <wsdl:operation name="getdates">
        <wsdlsoap:operation soapAction="" />
        <wsdl:input name="getdatesRequest">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://daac.ornl.gov/MODIS_webservice" use="encoded" />
        </wsdl:input>
        <wsdl:output name="getdatesResponse">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://daac.ornl.gov/MODIS_webservice" use="encoded" />
        </wsdl:output>
    </wsdl:operation>

    <wsdl:operation name="getsubset">
        <wsdlsoap:operation soapAction="" />
        <wsdl:input name="getsubsetRequest">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://daac.ornl.gov/MODIS_webservice" use="encoded" />
        </wsdl:input>
        <wsdl:output name="getsubsetResponse">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://daac.ornl.gov/MODIS_webservice" use="encoded" />
        </wsdl:output>
    </wsdl:operation>

    <wsdl:operation name="getsubsetorder">
        <wsdlsoap:operation soapAction="" />
        <wsdl:input name="getsubsetorderRequest">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://daac.ornl.gov/MODIS_webservice" use="encoded" />
        </wsdl:input>
        <wsdl:output name="getsubsetorderResponse">
            <wsdlsoap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" namespace="http://daac.ornl.gov/MODIS_webservice" use="encoded" />
        </wsdl:output>
    </wsdl:operation>

</wsdl:binding>

<wsdl:service name="myServiceHandlerService">
    <wsdl:port binding="impl:myServiceSoapBinding" name="myService">
        <wsdlsoap:address location="http://daac.ornl.gov/cgi-bin/MODIS/GLBVIZ_1_Glb_subset/MODIS_webservice.pl" />
    </wsdl:port>
</wsdl:service>

</wsdl:definitions>

我生成的代理类是：

namespace FarmNet.Modis {
// .... I cut off code
[System.Web.Services.WebServiceBindingAttribute(Name="myServiceSoapBinding", Namespace="http://daac.ornl.gov/MODIS_webservice")]
public partial class myServiceHandlerService : System.Web.Services.Protocols.SoapHttpClientProtocol {

   // ........... code cut off
    /// <remarks/>
    public myServiceHandlerService() {

    /// <remarks/>
    [System.Web.Services.Protocols.SoapRpcMethodAttribute("", RequestNamespace="http://daac.ornl.gov/MODIS_webservice", ResponseNamespace="http://daac.ornl.gov/MODIS_webservice")]
    [return: System.Xml.Serialization.SoapElementAttribute("getproductsReturn")]
    public string[] getproducts() {
        object[] results = this.Invoke("getproducts", new object[0]);
        return ((string[])(results[0]));
    }

    /// <remarks/>
    public void getproductsAsync() {
        this.getproductsAsync(null);
    }

    /// <remarks/>
    public void getproductsAsync(object userState) {
        if ((this.getproductsOperationCompleted == null)) {
            this.getproductsOperationCompleted = new System.Threading.SendOrPostCallback(this.OngetproductsOperationCompleted);
        }
        this.InvokeAsync("getproducts", new object[0], this.getproductsOperationCompleted, userState);
    }

    private void OngetproductsOperationCompleted(object arg) {
        if ((this.getproductsCompleted != null)) {
            System.Web.Services.Protocols.InvokeCompletedEventArgs invokeArgs = ((System.Web.Services.Protocols.InvokeCompletedEventArgs)(arg));
            this.getproductsCompleted(this, new getproductsCompletedEventArgs(invokeArgs.Results, invokeArgs.Error, invokeArgs.Cancelled, invokeArgs.UserState));
        }
    }

    /// <remarks/>
    [System.Web.Services.Protocols.SoapRpcMethodAttribute("", RequestNamespace="http://daac.ornl.gov/MODIS_webservice", ResponseNamespace="http://daac.ornl.gov/MODIS_webservice")]
    [return: System.Xml.Serialization.SoapElementAttribute("getbandsReturn")]
    public string[] getbands(string Product) {
        object[] results = this.Invoke("getbands", new object[] {
                    Product});
        return ((string[])(results[0]));
    }

    /// <remarks/>
    public void getbandsAsync(string Product) {
        this.getbandsAsync(Product, null);
    }

    /// <remarks/>
    public void getbandsAsync(string Product, object userState) {
        if ((this.getbandsOperationCompleted == null)) {
            this.getbandsOperationCompleted = new System.Threading.SendOrPostCallback(this.OngetbandsOperationCompleted);
        }
        this.InvokeAsync("getbands", new object[] {
                    Product}, this.getbandsOperationCompleted, userState);
    }

    private void OngetbandsOperationCompleted(object arg) {
        if ((this.getbandsCompleted != null)) {
            System.Web.Services.Protocols.InvokeCompletedEventArgs invokeArgs = ((System.Web.Services.Protocols.InvokeCompletedEventArgs)(arg));
            this.getbandsCompleted(this, new getbandsCompletedEventArgs(invokeArgs.Results, invokeArgs.Error, invokeArgs.Cancelled, invokeArgs.UserState));
        }
    }

    /// <remarks/>
    [System.Web.Services.Protocols.SoapRpcMethodAttribute("", RequestNamespace="http://daac.ornl.gov/MODIS_webservice", ResponseNamespace="http://daac.ornl.gov/MODIS_webservice")]
    [return: System.Xml.Serialization.SoapElementAttribute("getdatesReturn")]
    public string[] getdates(float Latitude, float Longitude, string Product) {
        object[] results = this.Invoke("getdates", new object[] {
                    Latitude,
                    Longitude,
                    Product});
        return ((string[])(results[0]));
    }

    /// <remarks/>
    public void getdatesAsync(float Latitude, float Longitude, string Product) {
        this.getdatesAsync(Latitude, Longitude, Product, null);
    }

    /// <remarks/>
    public void getdatesAsync(float Latitude, float Longitude, string Product, object userState) {
        if ((this.getdatesOperationCompleted == null)) {
            this.getdatesOperationCompleted = new System.Threading.SendOrPostCallback(this.OngetdatesOperationCompleted);
        }
        this.InvokeAsync("getdates", new object[] {
                    Latitude,
                    Longitude,
                    Product}, this.getdatesOperationCompleted, userState);
    }

    private void OngetdatesOperationCompleted(object arg) {
        if ((this.getdatesCompleted != null)) {
            System.Web.Services.Protocols.InvokeCompletedEventArgs invokeArgs = ((System.Web.Services.Protocols.InvokeCompletedEventArgs)(arg));
            this.getdatesCompleted(this, new getdatesCompletedEventArgs(invokeArgs.Results, invokeArgs.Error, invokeArgs.Cancelled, invokeArgs.UserState));
        }
    }

    /// <remarks/>
    [System.Web.Services.Protocols.SoapRpcMethodAttribute("", RequestNamespace="http://daac.ornl.gov/MODIS_webservice", ResponseNamespace="http://daac.ornl.gov/MODIS_webservice")]
    [return: System.Xml.Serialization.SoapElementAttribute("getsubsetReturn")]
    public ModisData getsubset(float Latitude, float Longitude, string Product, string Band, string MODIS_Subset_Start_Date, string MODIS_Subset_End_Date, string Km_Above_Below, string Km_Left_Right) {
        object[] results = this.Invoke("getsubset", new object[] {
                    Latitude,
                    Longitude,
                    Product,
                    Band,
                    MODIS_Subset_Start_Date,
                    MODIS_Subset_End_Date,
                    Km_Above_Below,
                    Km_Left_Right});
        return ((ModisData)(results[0]));
    }

    /// <remarks/>
    public void getsubsetAsync(float Latitude, float Longitude, string Product, string Band, string MODIS_Subset_Start_Date, string MODIS_Subset_End_Date, string Km_Above_Below, string Km_Left_Right) {
        this.getsubsetAsync(Latitude, Longitude, Product, Band, MODIS_Subset_Start_Date, MODIS_Subset_End_Date, Km_Above_Below, Km_Left_Right, null);
    }

    /// <remarks/>
    public void getsubsetAsync(float Latitude, float Longitude, string Product, string Band, string MODIS_Subset_Start_Date, string MODIS_Subset_End_Date, string Km_Above_Below, string Km_Left_Right, object userState) {
        if ((this.getsubsetOperationCompleted == null)) {
            this.getsubsetOperationCompleted = new System.Threading.SendOrPostCallback(this.OngetsubsetOperationCompleted);
        }
        this.InvokeAsync("getsubset", new object[] {
                    Latitude,
                    Longitude,
                    Product,
                    Band,
                    MODIS_Subset_Start_Date,
                    MODIS_Subset_End_Date,
                    Km_Above_Below,
                    Km_Left_Right}, this.getsubsetOperationCompleted, userState);
    }

    private void OngetsubsetOperationCompleted(object arg) {
        if ((this.getsubsetCompleted != null)) {
            System.Web.Services.Protocols.InvokeCompletedEventArgs invokeArgs = ((System.Web.Services.Protocols.InvokeCompletedEventArgs)(arg));
            this.getsubsetCompleted(this, new getsubsetCompletedEventArgs(invokeArgs.Results, invokeArgs.Error, invokeArgs.Cancelled, invokeArgs.UserState));
        }
    }

   // Code is cut off
[System.Xml.Serialization.SoapTypeAttribute(Namespace="http://daac.ornl.gov/MODIS_webservice")]
public partial class ModisData {

    private System.Nullable<float> xllcornerField;

    private System.Nullable<float> yllcornerField;

    private System.Nullable<float> cellsizeField;

    private System.Nullable<float> nrowsField;

    private System.Nullable<float> ncolsField;

    private string bandField;

    private string unitsField;

    private System.Nullable<float> scaleField;

    private System.Nullable<float> latitudeField;

    private System.Nullable<float> longitudeField;

    private string headerField;

    private string[] subsetField;

    /// <remarks/>
    [System.Xml.Serialization.SoapElementAttribute(IsNullable=true)]
    public System.Nullable<float> xllcorner {
        get {
            return this.xllcornerField;
        }
        set {
            this.xllcornerField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.SoapElementAttribute(IsNullable=true)]
    public System.Nullable<float> yllcorner {
        get {
            return this.yllcornerField;
        }
        set {
            this.yllcornerField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.SoapElementAttribute(IsNullable=true)]
    public System.Nullable<float> cellsize {
        get {
            return this.cellsizeField;
        }
        set {
            this.cellsizeField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.SoapElementAttribute(IsNullable=true)]
    public System.Nullable<float> nrows {
        get {
            return this.nrowsField;
        }
        set {
            this.nrowsField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.SoapElementAttribute(IsNullable=true)]
    public System.Nullable<float> ncols {
        get {
            return this.ncolsField;
        }
        set {
            this.ncolsField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.SoapElementAttribute(IsNullable=true)]
    public string band {
        get {
            return this.bandField;
        }
        set {
            this.bandField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.SoapElementAttribute(IsNullable=true)]
    public string units {
        get {
            return this.unitsField;
        }
        set {
            this.unitsField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.SoapElementAttribute(IsNullable=true)]
    public System.Nullable<float> scale {
        get {
            return this.scaleField;
        }
        set {
            this.scaleField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.SoapElementAttribute(IsNullable=true)]
    public System.Nullable<float> latitude {
        get {
            return this.latitudeField;
        }
        set {
            this.latitudeField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.SoapElementAttribute(IsNullable=true)]
    public System.Nullable<float> longitude {
        get {
            return this.longitudeField;
        }
        set {
            this.longitudeField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.SoapElementAttribute(IsNullable=true)]
    public string header {
        get {
            return this.headerField;
        }
        set {
            this.headerField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.SoapElementAttribute(IsNullable=true)]
    public string[] subset {
        get {
            return this.subsetField;
        }
        set {
            this.subsetField = value;
        }
    }
 // Code is cut off
}

现在所有函数：getproducts()、getdates()、getbands()都工作正常。唯一不起作用的函数是getsubset()。我使用 Fiddler 并看到正确接收到的肥皂响应为：

<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" 
        xmlns:xsd="http://www.w3.org/2001/XMLSchema" soap:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" 
        xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:tns1="http://daac.ornl.gov/MODIS_webservice">
    <soap:Body>
        <getsubsetResponse xmlns="http://daac.ornl.gov/MODIS_webservice">
            <tns1:getsubsetReturn xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xsi:type="tns1:ModisData">
                <xllcorner xsi:type="xsd:float">12900942.51</xllcorner>
                <yllcorner xsi:type="xsd:float">-3785264.93</yllcorner>
                <cellsize xsi:type="xsd:float">463.312716528</cellsize>
                <nrows xsi:type="xsd:float">21</nrows>
                <ncols xsi:type="xsd:float">21</ncols>
                <band xsi:type="xsd:string">LC_Property_1</band>
                <units xsi:type="xsd:string">Not Available</units>
                <scale xsi:type="xsd:float">0</scale>
                <latitude xsi:type="xsd:float">-34</latitude>
                <longitude xsi:type="xsd:float">140</longitude>
                <header xsi:type="xsd:string">HDFname,...     </header>
                <subset soapenc:arrayType="xsd:string[1]" xsi:type="soapenc:Array">
                    <item xsi:type="xsd:string">MCD12Q1.A2001001....</item>
                </subset>
            </tns1:getsubsetReturn>
        </getsubsetResponse>
    </soap:Body>
</soap:Envelope>

我的代码隐藏，我在其中调用 Web 服务：

myServiceHandlerClient o = new myServiceHandlerClient();
// This WORKS:
string[] products = o.getproducts();
// This does NOT work, data is returned with all null fields:
ModisData data = o.getsubset(-34, 140, "MCD12Q1", "LC_Property_1", "A2001001", "A2001001", "5", "5");

好的，所以根据我的研究，命名空间中可能存在不匹配，但我找不到它。 wsdl 文件中的命名空间和肥皂响应中的命名空间是相同的（这就是所有其他函数工作的原因）。另外，我也没有看到元素名称有任何拼写错误或任何错误。

这里可能出了什么问题？请帮忙。

ps：我什至尝试通过添加来自 Visual Studio 的服务引用来生成代理类来使用 WCF。然而，这些函数都不起作用，它们都返回 null。