把对象输出XML的类
using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.Collections;
namespace Exports
{
public class ExportXml : IDisposable
{
public ExportXml(System.IO.TextWriter write, object data)
{
mTextWrite = write;
mWriter = new System.Xml.XmlTextWriter(write);
mDate = data;
}
private System.IO.TextWriter mTextWrite;
private XmlWriter mWriter;
public XmlWriter Writer
{
get
{
return mWriter;
}
}
private object mDate;
public Object Data
{
get
{
return mDate;
}
}
public void Execute()
{
Writer.WriteStartElement(Data.GetType().Name);
object value;
foreach (NClay.PropertyHandler handler in GetHandler(Data.GetType()))
{
Writer.WriteStartElement(handler.Property.Name);
value = handler.Get(Data);
if (value == null)
continue;
if (value is ValueType)
{
Writer.WriteString(value.ToString());
}
else if (value is string)
{
Writer.WriteString(value.ToString());
}
else if (value is IEnumerable)
{
foreach (object item in (IEnumerable)value)
{
if (item is ValueType || item is string)
{
Writer.WriteStartElement("Value");
Writer.WriteString(item.ToString());
Writer.WriteEndElement();
}
else
{
using (ExportXml export = new ExportXml(mTextWrite, value))
{
export.Execute();
}
}
}
}
Writer.WriteEndElement();
}
Writer.WriteEndElement();
Writer.Flush();
}
static IDictionary<Type, List<NClay.PropertyHandler>> mPropertyHandlers
= new Dictionary<Type, List<NClay.PropertyHandler>>();
static IList<NClay.PropertyHandler> GetHandler(Type type)
{
List<NClay.PropertyHandler> handlers;
if (mPropertyHandlers.ContainsKey(type))
{
handlers = mPropertyHandlers[type];
}
else
{
lock (typeof(ExportXml))
{
if (mPropertyHandlers.ContainsKey(type))
{
handlers = mPropertyHandlers[type];
}
else
{
handlers = CreateHandlers(type);
mPropertyHandlers.Add(type, handlers);
}
}
}
return handlers;
}
static List<NClay.PropertyHandler> CreateHandlers(Type type)
{
List<NClay.PropertyHandler> handlers = new List<NClay.PropertyHandler>();
foreach (System.Reflection.PropertyInfo item in
type.GetProperties(System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Public))
{
handlers.Add(new NClay.PropertyHandler(item));
}
return handlers;
}
#region IDisposable 成员
public void Dispose()
{
Writer.Flush();
mWriter = null;
mTextWrite = null;
}
#endregion
}
}
