各位师兄：急问100分哦

[lovejean]

关于 BinaryRead接受的数据
怎么判断其中一项是空值
并没有上传东西。

万分感谢

[nchen123]

If Request.TotalBytes < 1 Then '如果没有数据上传

[chinesun]

这是一个Sub:
_________________________________
Public Sub GetDate (RetSize)
'定义变量
Dim RequestBinDate,sSpace,bCrLf,sInfo,iInfoStart,iInfoEnd,tStream,iStart,oFileInfo
Dim iFileSize,sFilePath,sFileType,sFormValue,sFileName
Dim iFindStart,iFindEnd
Dim iFormStart,iFormEnd,sFormName
'代码开始
If Request.TotalBytes < 1 Then
Err = 1
Exit Sub
End If
If RetSize > 0 Then
If Request.TotalBytes > RetSize Then
Err = 2
Exit Sub
End If
End If
Set Form = Server.CreateObject ("Scripting.Dictionary")
Form.CompareMode = 1
Set File = Server.CreateObject ("Scripting.Dictionary")
File.CompareMode = 1
Set tStream = Server.CreateObject ("ADODB.Stream")
Set oUpFileStream = Server.CreateObject ("ADODB.Stream")
oUpFileStream.Type = 1
oUpFileStream.Mode = 3
oUpFileStream.Open
oUpFileStream.Write Request.BinaryRead (Request.TotalBytes)
oUpFileStream.Position = 0
RequestBinDate = oUpFileStream.Read
iFormEnd = oUpFileStream.Size
bCrLf = ChrB (13) & ChrB (10)
'取得每个项目之间的分隔符
sSpace = MidB (RequestBinDate,1, InStrB (1,RequestBinDate,bCrLf)-1)
iStart = LenB (sSpace)
iFormStart = iStart+2
'分解项目
Do
iInfoEnd = InStrB (iFormStart,RequestBinDate,bCrLf & bCrLf)+3
tStream.Type = 1
tStream.Mode = 3
tStream.Open
oUpFileStream.Position = iFormStart
oUpFileStream.CopyTo tStream,iInfoEnd-iFormStart
tStream.Position = 0
tStream.Type = 2
tStream.CharSet = "gb2312"
sInfo = tStream.ReadText
'取得表单项目名称
iFormStart = InStrB (iInfoEnd,RequestBinDate,sSpace)-1
iFindStart = InStr (22,sInfo,"name=""",1)+6
iFindEnd = InStr (iFindStart,sInfo,"""",1)
sFormName = Mid (sinfo,iFindStart,iFindEnd-iFindStart)
'如果是文件
If InStr (45,sInfo,"filename=""",1) > 0 Then
Set oFileInfo = new FileInfo_Class
'取得文件属性
iFindStart = InStr (iFindEnd,sInfo,"filename=""",1)+10
iFindEnd = InStr (iFindStart,sInfo,"""",1)
sFileName = Mid (sinfo,iFindStart,iFindEnd-iFindStart)
oFileInfo.FileName = Mid (sFileName,InStrRev (sFileName, "\")+1)
oFileInfo.FilePath = Left (sFileName,InStrRev (sFileName, "\")+1)
oFileInfo.FileExt = Mid (sFileName,InStrRev (sFileName, ".")+1)
iFindStart = InStr (iFindEnd,sInfo,"Content-Type: ",1)+14
iFindEnd = InStr (iFindStart,sInfo,vbCr)
oFileInfo.FileType = Mid (sinfo,iFindStart,iFindEnd-iFindStart)
oFileInfo.FileStart = iInfoEnd
oFileInfo.FileSize = iFormStart -iInfoEnd -2
oFileInfo.FormName = sFormName
file.add sFormName,oFileInfo
else
'如果是表单项目
tStream.Close
tStream.Type = 1
tStream.Mode = 3
tStream.Open
oUpFileStream.Position = iInfoEnd
oUpFileStream.CopyTo tStream,iFormStart-iInfoEnd-2
tStream.Position = 0
tStream.Type = 2
tStream.CharSet = "gb2312"
sFormValue = tStream.ReadText
If Form.Exists (sFormName) Then
Form (sFormName) = Form (sFormName) & ", " & sFormValue
else
form.Add sFormName,sFormValue
End If
End If
tStream.Close
iFormStart = iFormStart+iStart+2
'如果到文件尾了就退出
Loop Until (iFormStart+2) = iFormEnd
RequestBinDate = ""
Set tStream = Nothing
End Sub
__________________________
然后用
Filesize=file.FileSize
'记录文件
if Filesize>0 then '如果 FileSize > 0 说明有文件数据
''执行上传文件
else
''说明空值，没有上传
end if

[chinesun]

以上代码必须建在一个类中，比如：
Class UpFile_Class
End Class

然后调用时，用：
dim upload,file
set upload=new UpFile_Class ''建立上传对象
set file=upload.file(formName) ''生成一个文件对象

[hengxin54]

支持楼上的

[lovejean]

谢谢
谢谢大家
结贴

[pp4u]

Request.TotalBytes < 1