asp.net中用流下载文件中文支持问题(解决问题再送1000分)
'web.config文件默认使用utf-8做request/response,不允许改变。这个代码能最大允许18个字符中文正确显示,但超过18个便失败。请问如何解决让之在utf-8编码下支持简体中文(任意长文件名)。
'代码:
sub test
Dim sFilename As String = "这是测试mypic这是测试mypic这是测试mypic这是测试mypic.jpg"
Dim sPath As String = Server.MapPath("./" & sFilename)
If File.Exists(sPath) Then
Dim ImageSize As Long
Dim ImageBuffer() As Byte
ImageSize = FileLen(sPath) '设置文件大小
'创建一文件流对象
Dim fs As FileStream = New FileStream(sPath, FileMode.OpenOrCreate)
'基于文件流创建二进制读
Dim r As BinaryReader = New BinaryReader(fs)
'指到文件的开头位置
r.BaseStream.Seek(0, SeekOrigin.Begin)
ImageBuffer = r.ReadBytes(ImageSize)
sFilename = System.Web.HttpUtility.UrlEncode(System.Text.Encoding.UTF8.GetBytes(Right(sFilename, 18)))
Response.Clear()
Response.ContentType = "image/jpeg"
Response.AddHeader("Content-Disposition", "attachment; filename=""" & sFilename & """")
Response.AddHeader("Content-Length", ImageBuffer.Length)
Response.BinaryWrite(ImageBuffer)
r.Close()
fs.Close()
Response.End()
Else
Response.Write("文件不存在!")
End If
end sub