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IXmlLineInfo Interface

Provides an interface to enable a class to return line and position information.

For a list of all members of this type, see IXmlLineInfo Members.

[Visual Basic]
Public Interface IXmlLineInfo
[C#]
public interface IXmlLineInfo
[C++]
public __gc __interface IXmlLineInfo
[JScript]
public interface IXmlLineInfo

Classes that Implement IXmlLineInfo

Class Description
XmlTextReader Represents a reader that provides fast, non-cached, forward-only access to XML data.
XmlValidatingReader Represents a reader that provides DTD, XML-Data Reduced (XDR) schema, and XML Schema definition language (XSD) schema validation.

Example

The following example parses an XML fragment. Each node is displayed including its depth, line number, and line position.

[Visual Basic] 
Imports System
Imports System.IO
Imports System.Xml
Imports Microsoft.VisualBasic

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

[C#] 
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();       
  }
}

[C++] 
#using <mscorlib.dll>
#using <System.Xml.dll>
using namespace System;
using namespace System::IO;
using namespace System::Xml;

int main() 
{
   // Create the XML fragment to be parsed.
   String * xmlFrag  = 
      S"<book>\n"
      S"<misc>\n"
      S"<style>paperback</style>\n"
      S"<pages>240</pages>\n"
      S"</misc>\n"
      S"</book>\n";

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

   // Create the XmlParserContext.
   XmlParserContext* context = new XmlParserContext(0, nsmgr, 0, XmlSpace::None);

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

   IXmlLineInfo* lineInfo = (dynamic_cast<IXmlLineInfo*>(reader));
   if (lineInfo -> HasLineInfo())
   {

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

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Namespace: System.Xml

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework

Assembly: System.Xml (in System.Xml.dll)

See Also

IXmlLineInfo Members | System.Xml Namespace

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