XDocumentType.SystemId Propriété

Définition

Espace de noms:

System.Xml.Linq

Assembly:

System.Xml.XDocument.dll

Assembly:

System.Xml.Linq.dll

Assembly:

netstandard.dll

Obtient ou définit l'identificateur système pour cette définition de type de document (DTD).

public:
 property System::String ^ SystemId { System::String ^ get(); void set(System::String ^ value); };

public string SystemId { get; set; }

public string? SystemId { get; set; }

member this.SystemId : string with get, set

Public Property SystemId As String

Valeur de propriété

String

String qui contient l'identificateur système pour cette définition de type de document (DTD).

Exemples

L’exemple suivant crée un document XML qui fait référence à un DTD privé externe. La DTD n’a pas de sous-ensemble interne. L’appel au XDocumentType constructeur reflète l’utilisation du DTD privé externe. Il passe null pour le sous-ensemble interne.

string pubsDtd =  
@"<!ELEMENT Pubs (Book+)>  
<!ELEMENT Book (Title, Author)>  
<!ELEMENT Title (#PCDATA)>  
<!ELEMENT Author (#PCDATA)>";  
File.WriteAllText("Pubs.dtd", pubsDtd);  

string target = "xml-stylesheet";  
string data = "href=\"mystyle.css\" title=\"Compact\" type=\"text/css\"";  

XDocument doc = new XDocument(  
    new XDocumentType("Pubs", null, "Pubs.dtd", null),  
    new XElement("Pubs",   
        new XElement("Book",  
            new XElement("Title", "Artifacts of Roman Civilization"),  
            new XElement("Author", "Moreno, Jordao")  
        ),  
        new XElement("Book",  
            new XElement("Title", "Midieval Tools and Implements"),  
            new XElement("Author", "Gazit, Inbar")  
        )  
    ),  
    new XComment("This is another comment.")  
);  
doc.Declaration = new XDeclaration("1.0", "utf-8", "true");  
doc.Save("Pubs.xml");  

// Validate Pubs.xml against Pubs.dtd.  
XmlReaderSettings xrs = new XmlReaderSettings();  
xrs.ProhibitDtd = false;  
xrs.ValidationType = ValidationType.DTD;  
xrs.ConformanceLevel = ConformanceLevel.Auto;  
XmlReader xr = XmlReader.Create("Pubs.xml", xrs);  
XDocument doc2 = XDocument.Load(xr);  

XDocumentType dt = doc2.Document.DocumentType;  
Console.WriteLine("SystemId:{0}", dt.SystemId);  

Dim pubsDtd As String = _   
    "<!ELEMENT Pubs (Book+)>" & Environment.NewLine & _  
    "<!ELEMENT Book (Title, Author)>" & Environment.NewLine & _  
    "<!ELEMENT Title (#PCDATA)>" & Environment.NewLine & _  
    "<!ELEMENT Author (#PCDATA)>"  
File.WriteAllText("Pubs.dtd", pubsDtd)  

Dim target As String = "xml-stylesheet"  
Dim data As String = "href='mystyle.css' title='Compact' type='text/css'"  

Dim doc As XDocument = _  
    <?xml version='1.0'?>  
    <Pubs>  
        <Book>  
            <Title>Artifacts of Roman Civilization</Title>  
            <Author>Moreno, Jordao</Author>  
        </Book>  
        <Book>  
            <Title>Midieval Tools and Implements</Title>  
            <Author>Gazit, Inbar</Author>  
        </Book>  
    </Pubs>  
    <!--This is another comment.-->  

doc _  
.FirstNode _  
.AddBeforeSelf(New XDocumentType("Pubs", Nothing, "Pubs.dtd", Nothing))  

doc.Declaration = New XDeclaration("1.0", "utf-8", "true")  
doc.Save("Pubs.xml")  

' Validate Pubs.xml against Pubs.dtd.  
Dim xrs As XmlReaderSettings = New XmlReaderSettings()  
xrs.ProhibitDtd = False  
xrs.ValidationType = ValidationType.DTD  
xrs.ConformanceLevel = ConformanceLevel.Auto  
Dim xr As XmlReader = XmlReader.Create("Pubs.xml", xrs)  
Dim doc2 As XDocument = XDocument.Load(xr)  

Dim dt As XDocumentType = doc2.Document.DocumentType  
Console.WriteLine("SystemId:{0}", dt.SystemId)  

Cet exemple produit la sortie suivante :

SystemId:Pubs.dtd  

Remarques

Si un document XML utilise un DTD privé externe, cette propriété contient l’identificateur privé du DTD externe.

Voir aussi

• Vue d’ensemble de LINQ to XML