如saveasfilename,uploadfile.PostedFile.SaveAs是ＮＥＴ里固有的吗？？？应该看什么书可以查的呢？？


void Upload( Object Source , EventArgs E )
        {
if ( saveasfilename.Value == "" )
  {
showresult.InnerHtml = "必须填写另存为的文件名!";
return;
  }
if ( uploadfile.PostedFile != null )
  {
try
  {
uploadfile.PostedFile.SaveAs( "c:\\temp\\" + saveasfilename.Value  );
showresult.InnerHtml = "成功上传" + saveasfilename.Value + "到:c:\\temp\\";
  }
catch ( Exception e )
  {
showresult.InnerHtml = "上传失败";
  }
  }