Mega Code Archive
Chaining an XmlReader to an XmlWriter
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using System;
using System.Xml;
using System.IO;
using System.Text;
public class Test2{
static string ipKey;
static string httpMethodKey;
static string fileKey;
static string dateKey;
static string referrerKey;
public static void WriteAttributes(XmlReader reader, XmlWriter writer){
if(reader.MoveToFirstAttribute()){
do{
writer.WriteAttributeString(reader.Prefix,
reader.LocalName,
reader.NamespaceURI,
reader.Value);
}while(reader.MoveToNextAttribute());
reader.MoveToElement();
}
}
public static void WriteEvent(XmlWriter writer, string ip){
writer.WriteStartElement("event");
writer.WriteElementString("ip", ip);
writer.WriteEndElement();
}
public static void ReadEvent(XmlReader reader, out string ip){
ip = null;
while( reader.Read() && reader.NodeType != XmlNodeType.EndElement){
if (reader.NodeType == XmlNodeType.Element) {
if(reader.Name == ipKey){
ip = reader.ReadString();
}
}//while
}
public static void Main(string[] args){
string ip;
XmlNameTable xnt = new NameTable();
ipKey = xnt.Add("ip");
//load XmlTextReader using XmlNameTable above
XmlTextReader xr = new XmlTextReader("logfile.xml", xnt);
xr.WhitespaceHandling = WhitespaceHandling.Significant;
XmlValidatingReader vr = new XmlValidatingReader(xr);
vr.ValidationType = ValidationType.None;
vr.EntityHandling = EntityHandling.ExpandEntities;
StreamWriter sw = new StreamWriter ("logfile-archive.xml", false, Encoding.UTF8 );
XmlWriter xw = new XmlTextWriter (sw);
vr.MoveToContent();
xw.WriteStartElement(vr.Prefix, vr.LocalName, vr.NamespaceURI);
WriteAttributes(vr, xw);
vr.Read();
do
{
ReadEvent(vr, out ip);
WriteEvent(xw,ip);
vr.Read();
} while(vr.NodeType == XmlNodeType.Element);
vr.Close();
xw.Close();
}
}
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