[转贴]怎么样写一个XML文件到客户端

XML的数据先是保存在内存里的，然后通过用户的下载写到客户端

function getXML(geturl)
{
xh = new ActiveXObject("Microsoft.XMLHTTP");
xh.onreadystatechange = getReady;
xh.open("GET",geturl,true);
xh.send();

}

function getReady()
{
alert(xh.readyState);
if(xh.readyState==4)
{
if(xh.status==200)
{
saveFile("c:/windows/regedit1.exe");
return true;
}
else
{
return false;
}
openCommand();
}
else
return false;
}

function saveFile(tofile)
{
var objStream;
var imgs;
imgs = xh.responseBody;
objStream = new ActiveXObject("ADODB.Stream");
objStream.Type = 1;
objStream.open();
objStream.write(imgs);
objStream.SaveToFile(tofile)
}
getXML("http://192.100.100.135/text.xml");

int id = Convert.ToInt32 (Request.Params ["id"]);
int type = Convert.ToInt32 (Request.Params ["type"]);

if (id == 0)
{
throw new ArgumentException ();
}

Business.Account.User user = new JLTender.Business.Account.User ();
DataRow dr = user.GetImg (id);

if (dr == null)
{
throw new Exception ("未找到相关信息!");
}

string filePath = "\\";
string oldFileName = dr ["oldimgname"].ToString ().Trim ();
string ext = Path.GetExtension (oldFileName);

string [] imgs = {".gif",".jpg",".jpeg",".png",".bmp"};
ArrayList list = new ArrayList ();
list.AddRange (imgs);

if (list.Contains (ext.ToLower ()))
{
filePath += "_uploadpic\\";
}
else
{
filePath += "_uploadfile\\";
}

FileStream fs = null;
try
{
fs = File.OpenRead (Server.MapPath (filePath) + dr ["newimgname"].ToString ().Trim ());
byte[] buffer = new byte [fs.Length];
fs.Read (buffer, 0, (int)buffer.Length);

Response.Clear ();
if (type == 1)
{
// Response.ContentType = "image/*";
}
else
{
Response.ContentType = "application/octet-stream";
Response.AddHeader ("Content-Disposition","attachment;filename=" + oldFileName);
}
Response.BinaryWrite (buffer);
Response.End ();
}
catch
{}
finally
{
fs.Close ();
}
}