在.NET中利用XMLHTTP下载文件的代码


            利用XMLHTTP下载文件，和以前的方法一样，先添加引用－COM－Microsoft Xml 3.0，然后在代码开始处写： using MSXML2; 下面就是主要的代码： private void Page_Load(object sender, System.EventArgs e){  string Url = "http://dotnet.aspx.cc/Images/logoSite.gif";  string StringFileName = Url.Substring(Url.LastIndexOf("/") + 1);  string StringFilePath = Request.PhysicalApplicationPath;  if(!StringFilePath.EndsWith("/"))  StringFilePath += "/";  MSXML2.XMLHTTP _xmlhttp = new MSXML2.XMLHTTPClass();  _xmlhttp.open("GET",Url,false,null,null);  _xmlhttp.send("");  if( _xmlhttp.readyState == 4 )    {  if(System.IO.File.Exists(StringFilePath + StringFileName))  System.IO.File.Delete(StringFilePath + StringFileName);  System.IO.FileStream fs = new System.IO.FileStream(StringFilePath + StringFileName, System.IO.FileMode.CreateNew);  System.IO.BinaryWriter w = new System.IO.BinaryWriter(fs);  w.Write((byte[])_xmlhttp.responseBody);  w.Close();  fs.Close();  Response.Write ("文件已经得到。<br><a href='" + Request.ApplicationPath + StringFileName +"' target='_blank'>");      Response.Write ("查看" + StringFileName + "</a>");  }  else  Response.Write (_xmlhttp.statusText);    Response.End();}