IXmlLineInfo 介面

定義

命名空間:

System.Xml

組件:

netstandard.dll, System.Xml.ReaderWriter.dll

來源:

IXmlLineInfo.cs

提供介面，使類別能回傳線路與位置資訊。

public interface class IXmlLineInfo

public interface IXmlLineInfo

type IXmlLineInfo = interface

Public Interface IXmlLineInfo

衍生

System.Xml.Linq.XObject

System.Xml.XmlTextReader

System.Xml.XmlValidatingReader

範例

以下範例解析一個 XML 片段。 每個節點都會顯示，包括其深度、行號和行位。

using System;
using System.IO;
using System.Xml;

public class Sample{

  public static void Main(){

    // Create the XML fragment to be parsed.
    string xmlFrag  =
    @"<book>
           <misc>
              <style>paperback</style>
              <pages>240</pages>
           </misc>
        </book>
    ";

    // Create the XmlNamespaceManager.
    XmlNamespaceManager nsmgr = new XmlNamespaceManager(new NameTable());

    // Create the XmlParserContext.
    XmlParserContext context = new XmlParserContext(null, nsmgr, null, XmlSpace.None);

    // Create the reader.
    XmlValidatingReader reader = new XmlValidatingReader(xmlFrag, XmlNodeType.Element, context);

    IXmlLineInfo lineInfo = ((IXmlLineInfo)reader);
    if (lineInfo.HasLineInfo()){

      // Parse the XML and display each node.
      while (reader.Read()){
       switch (reader.NodeType){
         case XmlNodeType.Element:
           Console.Write("{0} {1},{2}  ", reader.Depth, lineInfo.LineNumber, lineInfo.LinePosition);
           Console.WriteLine("<{0}>", reader.Name);
           break;
         case XmlNodeType.Text:
           Console.Write("{0} {1},{2}  ", reader.Depth, lineInfo.LineNumber, lineInfo.LinePosition);
           Console.WriteLine("  {0}", reader.Value);
           break;
         case XmlNodeType.EndElement:
           Console.Write("{0} {1},{2}  ", reader.Depth, lineInfo.LineNumber, lineInfo.LinePosition);
           Console.WriteLine("</{0}>", reader.Name);
           break;
       }
     }
    }

    // Close the reader.
    reader.Close();
  }
}

Imports System.IO
Imports System.Xml

public class Sample

  public shared sub Main()

    ' Create the XML fragment to be parsed.
    Dim xmlFrag as string = "<book>" + Chr(10) & _
                            "  <misc>"  + Chr(10) & _
                            "    <style>paperback</style>"  + Chr(10) & _
                            "    <pages>240</pages>" + Chr(10) & _
                            "  </misc>" + Chr(10) & _
                            "</book>"

    ' Create the XmlNamespaceManager.
    Dim nsmgr as XmlNamespaceManager = new XmlNamespaceManager(new NameTable())

    ' Create the XmlParserContext.
    Dim context as XmlParserContext = new XmlParserContext(nothing, nsmgr, nothing, XmlSpace.None)

    ' Create the reader.
    Dim reader as XmlValidatingReader = new XmlValidatingReader(xmlFrag, XmlNodeType.Element, context)

    Dim lineInfo as IXmlLineInfo = CType(reader, IXmlLineInfo)
    if (lineInfo.HasLineInfo())
       
      ' Parse the XML and display each node.
      while (reader.Read())
       select case reader.NodeType
         case XmlNodeType.Element:
           Console.Write("{0} {1},{2}  ", reader.Depth, lineInfo.LineNumber, lineInfo.LinePosition)
           Console.WriteLine("<{0}>", reader.Name)
         case XmlNodeType.Text:
           Console.Write("{0} {1},{2}  ", reader.Depth, lineInfo.LineNumber, lineInfo.LinePosition)
           Console.WriteLine("  {0}", reader.Value)
         case XmlNodeType.EndElement:
           Console.Write("{0} {1},{2}  ", reader.Depth, lineInfo.LineNumber, lineInfo.LinePosition)
           Console.WriteLine("</{0}>", reader.Name)
       end select       
      end while           
    end if

    ' Close the reader.
    reader.Close()     
  
  end sub
end class

屬性

名稱	Description
LineNumber	會取得目前的行號。
LinePosition	會得到目前的線位。

方法

名稱	Description
HasLineInfo()	會得到一個值，表示該類別是否能回傳行資訊。