使用递归获取网站下的所有同类型文件

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using System;
using System.Text ;
using System.IO ;
using System.Xml ;
using System.Xml.XPath ;
using System.Web ;
using System.Collections ;


namespace GST.Common.Xml
{
/// <summary>
/// 得到站点内的所有Aspx文件，并存入Xml文件中
/// </summary>
public class GetAllFiles
{
public GetAllFiles()
{
//
// TODO: 在此处添加构造函数逻辑
//
}


/// <summary>
/// 更新Xml文件的某个支点
/// </summary>
/// <param name="Files"></param>
/// <param name="Desc"></param>
public void UpdateXmlFile(string Files,string Desc,string FileSrc)
{
XmlDocument doc = new XmlDocument();
doc.Load(HttpContext.Current.Server.MapPath(FileSrc));

XmlNode Node = doc.SelectSingleNode("/AspxFiles/File[text()=\""+Files+"\"]");

if (Node!=null)
{
Node.Attributes[0].InnerText = Desc ;
}

doc.Save(HttpContext.Current.Server.MapPath(FileSrc));

}

/// <summary>
/// 写入Xml文件
/// </summary>
public void WriteXmlFile(string FileSrc,ArrayList al)
{
XmlDocument doc = new XmlDocument();
doc.Load(HttpContext.Current.Server.MapPath(FileSrc));

XmlElement Element = doc.DocumentElement ;
bool Update= false;



foreach(object obj in al)
{


XmlNode Node = doc.SelectSingleNode("/AspxFiles/File[text()=\""+obj.ToString()+"\"]");

if (Node ==null)
{
XmlElement ElementChild =doc.CreateElement("File");
ElementChild.InnerText = obj.ToString();
XmlCDataSection cdata = doc.CreateCDataSection(obj.ToString());
XmlAttribute attribute = doc.CreateAttribute("Desc");
attribute.Value =cdata.Value ;
ElementChild.Attributes.Append(attribute);
Element.AppendChild(ElementChild);
Update = true;
}




}
if(Update)
doc.Save(HttpContext.Current.Server.MapPath(FileSrc));





}
/// <summary>
/// 返回所有的Aspx文件
/// </summary>
/// <returns>String Array</returns>
public void GetAllAspxFile(string WebPath,ref ArrayList al)
{


string[] AspxFiles = Directory.GetDirectories(WebPath);

if (AspxFiles.Length > 0)
{
foreach( string AspFile in AspxFiles)
{

foreach(string InnerFile in Directory.GetFiles(AspFile))
{
if(Path.GetExtension(InnerFile).ToLower() ==".aspx")
{

string FileName = Path.GetFileName(InnerFile);

al.Add(FileName);
}
}

GetAllAspxFile(AspFile,ref al);

}





}

else
{

string[] Files = Directory.GetFiles(WebPath);
foreach(string AspFile in Files)
{
if(Path.GetExtension(AspFile).ToLower() ==".aspx")
{

string FileName = Path.GetFileName(AspFile);
al.Add(FileName);

}
}
}




}

}
}