从服务器通过URL不中转保存的下载
首先引用System.dll
然后新开一个页面，空的，在后台Page_Load方法里写
Dim docPath As String =””
Dim fileName As String =
Dim myWebClient As New Net.WebClient()
Dim data() As Byte = myWebClient.DownloadData(New Uri(docPath))
Response.Clear()
Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName))
Response.AddHeader("Content-Length", data.Length)
Response.ContentType = "application/octet-stream"
Response.BinaryWrite(data)
Response.End()
myWebClient.Dispose()