C# : Get Specific Element Before another Element with Linq

Question

Consider the following snippet from an XSD:

    <xs:complexType name="AccountIdentification4ChoiceGPS">
    <xs:choice>
        <xs:element name="IBAN" type="IBAN2007Identifier">
            <xs:annotation>
                <xs:appinfo>
                    <xs:logicalname>IBAN</xs:logicalname>
                    <xs:additionalInfo>[A-Z]{2,2}[0-9]{2,2}[a-zA-Z0-9]{1,30}</xs:additionalInfo>
                    <xs:ISOType>(CashAccount20)</xs:ISOType>
                </xs:appinfo>
                <xs:documentation>Unambiguous identification of the account as International Bank Account Number (IBAN).</xs:documentation>
            </xs:annotation>
        </xs:element>
        <xs:element name="Othr" type="GenericAccountIdentification1GPS">
            <xs:annotation>
                <xs:appinfo>
                    <xs:logicalname>Other</xs:logicalname>
                    <xs:ISOType>(CashAccount20)</xs:ISOType>
                </xs:appinfo>
            </xs:annotation>
        </xs:element>
    </xs:choice>
</xs:complexType>

Using LINQ: If I know element name="IBAN" how can I retrieve element <xs:complexType name="AccountIdentification4ChoiceGPS"> if I don't know much about content of my XSD.`? The only think I may know is that the LocalName is "complexType";

I am thinking of :

    IEnumerable<XElement> elementAbove = xsdDocument.Descendants()
.Where(x=>x.Name.LocalName == "complexType")
.Select(Get here the value of the element that could be the parent or the parent's parent).

This is where I get stuck.

[Is this the what you mean?](https://stackoverflow.com/a/35667967/424129) — 15ee8f99-57ff-4f92-890c-b56153, Jun 27 '19 at 20:21

Matt.G · Accepted Answer · 2019-06-28T13:04:48.457

2

Try:

IEnumerable<XElement> elementAbove = xsdDocument.Descendants()
   .Where(x => x.Name.LocalName == "complexType" && x.Descendants().Any(y => y.Name.LocalName == "element" && y.Attributes().Any(z => z.Value == "IBAN")));

edited Jun 28 '19 at 13:04

answered Jun 27 '19 at 21:03

Matt.G

3,586
2
10
23

That almost did it. The `z.Name` should have been `z.Value`. Thanks Matt! – Rico Strydom Jun 28 '19 at 05:21

C# : Get Specific Element Before another Element with Linq

1 Answers1