XML 验证与 C#

Question

Good day folks. I am having some issues trying to get an XML file validated against it's schema: The XML file I have looks like this:

<?xml version="1.0" encoding="utf-8"?>
<game:gameXML xmlns:game="national:game" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <Header>
    <From description="Gamer">Gamer</From>
    <To description="Player">Player</To>
    <MessageId>1620711716</MessageId>
    <MessageDate>2021-05-11T15:41:53</MessageDate>
    <TransactionGroup>Ball</TransactionGroup>
    <Priority>Medium</Priority>
    <SecurityContext>CONTACT_PERSON_GOES_HERE</SecurityContext>
    <Market>Japan</Market>
  </Header>
  <Transactions>
    <Transaction transaction="1620711716">
      <ReportRequest>
        <ReportParameters xsi:type="game:reportParameters">
          <ReportName>All</ReportName>
          <FromDate>2005-01-01</FromDate>
          <ToDate>2021-05-11</ToDate>    
        </ReportParameters>
      </ReportRequest>
    </Transaction>
  </Transactions>
</game:gameXML>

I used VS 2019 to generate the corresponding schema, which gives me this:

xmlFile.xsd

<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:game="national:game" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="national:game" xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:import schemaLocation="xmlContent.xsd" />
    <xs:element name="gameXML">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="Header" />
                <xs:element ref="Transactions" />
            </xs:sequence>
        </xs:complexType>
    </xs:element>
</xs:schema>

and

xmlContent.xsd

<?xml version="1.0" encoding="utf-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="Header">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="From">
                    <xs:complexType>
                        <xs:simpleContent>
                            <xs:extension base="xs:string">
                                <xs:attribute name="description" type="xs:string" use="required" />
                            </xs:extension>
                        </xs:simpleContent>
                    </xs:complexType>
                </xs:element>
                <xs:element name="To">
                    <xs:complexType>
                        <xs:simpleContent>
                            <xs:extension base="xs:string">
                                <xs:attribute name="description" type="xs:string" use="required" />
                            </xs:extension>
                        </xs:simpleContent>
                    </xs:complexType>
                </xs:element>
                <xs:element name="MessageId" type="xs:unsignedInt" />
                <xs:element name="MessageDate" type="xs:dateTime" />
                <xs:element name="TransactionGroup" type="xs:string" />
                <xs:element name="Priority" type="xs:string" />
                <xs:element name="SecurityContext" type="xs:string" />
                <xs:element name="Market" type="xs:string" />
            </xs:sequence>
        </xs:complexType>
    </xs:element>
    <xs:element name="Transactions">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="Transaction">
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="ReportRequest">
                                <xs:complexType>
                                    <xs:sequence>
                                        <xs:element name="ReportParameters">
                                            <xs:complexType>
                                                <xs:sequence>
                                                    <xs:element name="ReportName" type="xs:string" />
                                                    <xs:element name="FromDate" type="xs:date" />
                                                    <xs:element name="ToDate" type="xs:date" />
                                                </xs:sequence>
                                            </xs:complexType>
                                        </xs:element>
                                    </xs:sequence>
                                </xs:complexType>
                            </xs:element>
                        </xs:sequence>
                        <xs:attribute name="transaction" type="xs:unsignedInt" use="required" />
                    </xs:complexType>
                </xs:element>
            </xs:sequence>
        </xs:complexType>
    </xs:element>
</xs:schema>

The code I am using to load these is:

XmlReaderSettings settings = new XmlReaderSettings { DtdProcessing = DtdProcessing.Parse };
XmlSchemaSet xs = new XmlSchemaSet();
xs.Add("national:game", "xmlFile.xsd");
xs.Add("national:game", "xmlContent.xsd");
xs.Compile();

As soon as I run this it explodes with error:

System.Exception: This is an invalid xsi:type 'national:game:reportParameters'.

Clearly it is injecting the namespace into the xmlContent.xsd file and I can't figure out what needs to be set to prevent this. In fact, this.xsd file should have it's own namespace (see <ReportParameters xsi:type="game:reportParameters"> in the actual.xml file).

Any clues, pointers or help would be tremendously appreciated. Thank you.

Answer 1

None of your types are named, so it looks as though there are no valid values for xsi:type besides the schema built-in types because all the complexTypes are anonymous.

This is one respect where xsd.exe (the tool used to generate schemas) is limited, since by definition if an xsi:type attribute is present it must refer to some type declared by the schema, but the generated schema declares no named types. However its purpose is to resolve ambiguity, so it wouldn't be logical for that same tool to introduce ambiguity.

To fix this, restructure xmlContent.xsd to declare the reportParameters type globally and reference it ie

<xs:element name="ReportParameters" type="game:reportParameters"/>

<xs:complexType name="reportParameters">
...