XmlEntity.SystemId 属性
定义
获取实体声明上系统标识符的值。Gets the value of the system identifier on the entity declaration.
public:
property System::String ^ SystemId { System::String ^ get(); };
public string? SystemId { get; }
public string SystemId { get; }
member this.SystemId : string
Public ReadOnly Property SystemId As String
属性值
实体上的系统标识符。The system identifier on the entity. 如果没有系统标识符,则返回 null。If there is no system identifier, null is returned.
示例
下面的示例显示了有关 XML 文档中声明的实体的信息。The following example displays information on the entities declared in the XML document.
#using <System.Xml.dll>
using namespace System;
using namespace System::IO;
using namespace System::Xml;
public ref class Sample
{
public:
static void DisplayEntities( XmlNamedNodeMap^ nMap )
{
for ( int i = 0; i < nMap->Count; i++ )
{
XmlEntity^ ent = dynamic_cast<XmlEntity^>(nMap->Item( i ));
Console::Write( " {0} ", ent->NodeType );
Console::Write( " {0} ", ent->Name );
Console::Write( " {0} ", ent->NotationName );
Console::Write( " {0} ", ent->PublicId );
Console::Write( " {0} ", ent->SystemId );
Console::WriteLine();
}
}
};
int main()
{
XmlDocument^ doc = gcnew XmlDocument;
doc->Load( "doment.xml" );
Console::WriteLine( "Display information on all entities..." );
XmlNamedNodeMap^ nMap = doc->DocumentType->Entities;
Sample^ MySample = gcnew Sample;
MySample->DisplayEntities( nMap );
}
using System;
using System.IO;
using System.Xml;
public class Sample
{
private const String filename = "doment.xml";
public static void Main()
{
XmlDocument doc = new XmlDocument();
doc.Load(filename);
Console.WriteLine("Display information on all entities...");
XmlNamedNodeMap nMap = doc.DocumentType.Entities;
DisplayEntities(nMap);
}
public static void DisplayEntities(XmlNamedNodeMap nMap)
{
for (int i=0; i < nMap.Count; i++)
{
XmlEntity ent = (XmlEntity) nMap.Item(i);
Console.Write("{0} ", ent.NodeType);
Console.Write("{0} ", ent.Name);
Console.Write("{0} ", ent.NotationName);
Console.Write("{0} ", ent.PublicId);
Console.Write("{0} ", ent.SystemId);
Console.WriteLine();
}
}
}
Imports System.IO
Imports System.Xml
public class Sample
private const filename as String = "doment.xml"
public shared sub Main()
Dim doc as XmlDocument = new XmlDocument()
doc.Load(filename)
Console.WriteLine("Display information on all entities...")
Dim nMap as XmlNamedNodeMap = doc.DocumentType.Entities
DisplayEntities(nMap)
end sub
public shared sub DisplayEntities(nMap as XmlNamedNodeMap)
Dim i as integer
for i = 0 to nMap.Count - 1
Dim ent as XmlEntity = CType(nMap.Item(i), XmlEntity)
Console.Write("{0} ", ent.NodeType)
Console.Write("{0} ", ent.Name)
Console.Write("{0} ", ent.NotationName)
Console.Write("{0} ", ent.PublicId)
Console.Write("{0} ", ent.SystemId)
Console.WriteLine()
next
end sub
end class
该示例使用文件 doment.xml 作为输入。The example uses the file doment.xml as input.
<!DOCTYPE doc [
<!ELEMENT doc ANY>
<!NOTATION w SYSTEM "wine.exe">
<!NOTATION v PUBLIC "vine.exe">
<!NOTATION jpg PUBLIC "Jpeg picture format">
<!NOTATION gif SYSTEM "Gif picture format">
<!ENTITY wn PUBLIC "http://www.cohowinery.com" "coho.exe" NDATA w>
<!ENTITY vn SYSTEM "http://www.cohovineyard.com" NDATA v>
<!ENTITY mytxt "Text Sample">
<!ATTLIST doc
src ENTITY #IMPLIED
srcs ENTITIES #IMPLIED
jpgPic NOTATION (jpg) #IMPLIED
gifPic NOTATION (gif) #REQUIRED>
]>
<doc jpgPic="jpg" gifPic="gif" srcs="vn wn">
something
</doc>