使用具有属性的重复元素名称的 C# LINQ to XML 查询

Question

        <Party id="Party_1">
            <PartyTypeCode tc="1">Person</PartyTypeCode>
            <FullName>John Doe</FullName>
            <GovtID>123456789</GovtID>
            <GovtIDTC tc="1">Social Security Number US</GovtIDTC>
            <ResidenceState tc="35">New Jersey</ResidenceState>
            <Person>
                <FirstName>Frank</FirstName>
                <MiddleName>Roberts</MiddleName>
                <LastName>Madison</LastName>                    
                <Prefix>Dr.</Prefix>
                <Suffix>III</Suffix>
                <Gender tc="1">Male</Gender>
                <BirthDate>1974-01-01</BirthDate>
                <Age>35</Age>
                <Citizenship tc="1">United States of America</Citizenship>
            </Person>
            <Address>
                <AddressTypeCode tc="26">Bill Mailing</AddressTypeCode>
                <Line1>2400 Meadow Lane</Line1>
                <Line2></Line2>
                <Line3></Line3>
                <Line4></Line4>
                <City>Somerset</City>
                <AddressStateTC tc="35">New Jersey</AddressStateTC>
                <Zip>07457</Zip>
                <AddressCountryTC tc="1">United States of America</AddressCountryTC>
            </Address>
        </Party>
        <!-- ***********************  -->
        <!--  Insured Information     -->
        <!-- ***********************  -->
        <Party id="Party_2">
            <PartyTypeCode tc="1">Person</PartyTypeCode>
            <FullName>Dollie Robert Madison</FullName>
            <GovtID>123956239</GovtID>
            <GovtIDTC tc="1">Social Security Number US</GovtIDTC>
            <Person>
                <FirstName>Dollie</FirstName>
                <MiddleName>R</MiddleName>
                <LastName>Madison</LastName>
                <Suffix>III</Suffix>
                <Gender tc="2">Female</Gender>
                <BirthDate>1996-10-12</BirthDate>
                <Citizenship tc="1">United States of America</Citizenship>
            </Person>
            <!-- Insured Address -->
            <Address>
                <AddressTypeCode tc="26">Bill Mailing</AddressTypeCode>
                <Line1>2400 Meadow Lane</Line1>
                <City>Somerset</City>
                <AddressStateTC tc="35">New Jersey</AddressStateTC>
                <Zip>07457</Zip>
                <AddressCountryTC tc="1">United States of America</AddressCountryTC>
            </Address>
            <Risk>
                <!-- Disability Begin Effective Date -->
                <DisabilityEffectiveStartDate>2006-01-01</DisabilityEffectiveStartDate>
                <!-- Disability End Effective Date -->
                <DisabilityEffectiveStopDate>2008-01-01</DisabilityEffectiveStopDate>
            </Risk>
        </Party>
        <!-- *******************************  -->
        <!--  Company Information     -->
        <!-- ******************************  -->
        <Party id="Party_3">
            <PartyTypeCode tc="2">Organization</PartyTypeCode>
            <Organization>
                <DTCCMemberCode>1234</DTCCMemberCode>
            </Organization>
            <Carrier>
                <CarrierCode>105</CarrierCode>
            </Carrier>
        </Party>

这是我的代码，它不起作用，因为第 3 方不包含全名，如果我只返回名称属性，我知道 partyelements 包含 3 个方。有没有办法单独遍历每个标签？

        var partyElements = from party in xmlDoc.Descendants("Party")
           select new
           {
               Name = party.Attribute("id").Value,
               PartyTypeCode = party.Element("PartyTypeCode").Value,
               FullName = party.Element("FullName").Value,
               GovtID = party.Element("GovtID").Value,
           };

Answer 1

按照这些思路怎么样？ (更多的是想法/建议而不是实现，因为我不知道你的对象模型)

var parties = xmlDoc.Descendants("Party");
foreach(var party in parties)
{
    int partyTypeCode = party.Element("PartyTypeCode").Value;
    if(partyTypeCode == 1)
    {
        var person = personFactory.Build(party);
        // do something
    }
    else if(partyTypeCode == 2)
    {
        var organization = companyFactory.Build(party);
        // do something
    }
}

在一个完美的多态世界中，您只有一个 PartyFactory 而没有 if 或 switch 语句，但是一个 person party 和一个公司聚会完全不同。