怎么把一个图片的文件流写入sql的image字段??

hufeikong 2010-07-07 03:39:17
我已经知道文件的流,filestream,数据表记录对象rs,image字段为pic

如何把filestream存入image字段

我尝试用:


rs.fields("pic").appendchunk filestream.Read


这个视乎不行啊,不报错,但是显示图片内容不对

显示用
response.binarywrite rs("pic")
这个是没错的,因为读取别人已经存入的image就是正确的
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hufeikong 2010-07-07
成功了,噢ye!
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hufeikong 2010-07-07
由于我的表单是动态添加的,不但多,而且还存在name名字一样的表单,图片也不是一张,刚好upload_5xsoft已经把每个表单和文件都取到一个文件流中了,对于每个表单的文件它可以知道文件在流中的位置,upload_5xsoft中有把流保存为一个文件的函数,代码如下:

<SCRIPT RUNAT=SERVER LANGUAGE=VBSCRIPT>
dim Data_5xsoft

Class upload_5xsoft

dim objForm,objFile,Version

Public function Form(strForm)
strForm=lcase(strForm)
if not objForm.exists(strForm) then
Form=""
else
Form=objForm(strForm)
end if
end function

Public function File(strFile)
strFile=lcase(strFile)
if not objFile.exists(strFile) then
set File=new FileInfo
else
set File=objFile(strFile)
end if
end function


Private Sub Class_Initialize
dim RequestData,sStart,vbCrlf,sInfo,iInfoStart,iInfoEnd,tStream,iStart,theFile
dim iFileSize,sFilePath,sFileType,sFormValue,sFileName
dim iFindStart,iFindEnd
dim iFormStart,iFormEnd,sFormName
Version="化境HTTP上传程序 Version 2.1"
set objForm=Server.CreateObject("Scripting.Dictionary")
set objFile=Server.CreateObject("Scripting.Dictionary")
if Request.TotalBytes<1 then Exit Sub
set tStream = Server.CreateObject("adodb.stream")
set Data_5xsoft = Server.CreateObject("adodb.stream")
Data_5xsoft.Type = 1
Data_5xsoft.Mode =3
Data_5xsoft.Open
Data_5xsoft.Write Request.BinaryRead(Request.TotalBytes)
Data_5xsoft.Position=0
RequestData =Data_5xsoft.Read

iFormStart = 1
iFormEnd = LenB(RequestData)
vbCrlf = chrB(13) & chrB(10)
sStart = MidB(RequestData,1, InStrB(iFormStart,RequestData,vbCrlf)-1)
iStart = LenB (sStart)
iFormStart=iFormStart+iStart+1
while (iFormStart + 10) < iFormEnd
iInfoEnd = InStrB(iFormStart,RequestData,vbCrlf & vbCrlf)+3
tStream.Type = 1
tStream.Mode =3
tStream.Open
Data_5xsoft.Position = iFormStart
Data_5xsoft.CopyTo tStream,iInfoEnd-iFormStart
tStream.Position = 0
tStream.Type = 2
tStream.Charset ="gb2312"
sInfo = tStream.ReadText
tStream.Close
'取得表单项目名称
iFormStart = InStrB(iInfoEnd,RequestData,sStart)
iFindStart = InStr(22,sInfo,"name=""",1)+6
iFindEnd = InStr(iFindStart,sInfo,"""",1)
sFormName = lcase(Mid (sinfo,iFindStart,iFindEnd-iFindStart))
'如果是文件
if InStr (45,sInfo,"filename=""",1) > 0 then
set theFile=new FileInfo
'取得文件名
iFindStart = InStr(iFindEnd,sInfo,"filename=""",1)+10
iFindEnd = InStr(iFindStart,sInfo,"""",1)
sFileName = Mid (sinfo,iFindStart,iFindEnd-iFindStart)
theFile.FileName=getFileName(sFileName)
theFile.FilePath=getFilePath(sFileName)
theFile.FileExt=GetFileExt(sFileName)
'取得文件类型
iFindStart = InStr(iFindEnd,sInfo,"Content-Type: ",1)+14
iFindEnd = InStr(iFindStart,sInfo,vbCr)
theFile.FileType =Mid (sinfo,iFindStart,iFindEnd-iFindStart)
theFile.FileStart =iInfoEnd
theFile.FileSize = iFormStart -iInfoEnd -3
theFile.FormName=sFormName
if not objFile.Exists(sFormName) then
objFile.add sFormName,theFile
end if
else
'如果是表单项目
tStream.Type =1
tStream.Mode =3
tStream.Open
Data_5xsoft.Position = iInfoEnd
Data_5xsoft.CopyTo tStream,iFormStart-iInfoEnd-3
tStream.Position = 0
tStream.Type = 2
tStream.Charset ="gb2312"
sFormValue = tStream.ReadText
tStream.Close
if objForm.Exists(sFormName) then
objForm(sFormName)=objForm(sFormName)&", "&sFormValue
else
objForm.Add sFormName,sFormValue
end if
end if
iFormStart=iFormStart+iStart+1
wend
RequestData=""
set tStream =nothing
End Sub

Private Sub Class_Terminate
if Request.TotalBytes>0 then
objForm.RemoveAll
objFile.RemoveAll
set objForm=nothing
set objFile=nothing
Data_5xsoft.Close
set Data_5xsoft =nothing
end if
End Sub


Private function GetFilePath(FullPath)
If FullPath <> "" Then
GetFilePath = left(FullPath,InStrRev(FullPath, "\"))
Else
GetFilePath = ""
End If
End function

Private function GetFileExt(FullPath)
If FullPath <> "" Then
GetFileExt = mid(FullPath,InStrRev(FullPath, ".")+1)
Else
GetFileExt = ""
End If
End function

Private function GetFileName(FullPath)
If FullPath <> "" Then
GetFileName = mid(FullPath,InStrRev(FullPath, "\")+1)
Else
GetFileName = ""
End If
End function
End Class

Class FileInfo
dim FormName,FileName,FilePath,FileSize,FileExt,FileType,FileStart
Private Sub Class_Initialize
FileName = ""
FilePath = ""
FileSize = 0
FileStart= 0
FormName = ""
FileType = ""
FileExt = ""
End Sub

'////////这个函数是把文件流存为一个文件用的
Public function SaveAs(FullPath)
dim dr,ErrorChar,i
SaveAs=true
if trim(fullpath)="" or FileStart=0 or FileName="" or right(fullpath,1)="/" then exit function
set dr=CreateObject("Adodb.Stream")
dr.Mode=3
dr.Type=1
dr.Open
Data_5xsoft.position=FileStart
Data_5xsoft.copyto dr,FileSize
dr.SaveToFile FullPath,2
dr.Close
set dr=nothing
SaveAs=false
end function

'////////这个是我自己改的,我希望getbyte返回文件流的内容
Public function GetByte()
dim dr
GetByte=""
if FileStart=0 or FileName="" then exit function
set dr=CreateObject("Adodb.Stream")
dr.Mode=3
dr.Type=1
dr.Open
Data_5xsoft.position=FileStart
Data_5xsoft.copyto dr,FileSize
GetByte=dr.Read
dr.Close
end function

End Class
</SCRIPT>

使用时是这样的
set upload=new upload_5xsoft 'upload就是一个对象
'取的图片
set picfile=upload.file("EquipmentPic")

picture=picfile.GetByte()


打开数据库部分省略。。
用这个方法存入
res.fields("EquipmentPic").appendchunk picture

程序没错,但是这样存入的数据是不对的,不能显示为一个图片,但是问什么这个流可以输出为一个图片文件


回复
hufeikong 2010-07-07
谢谢楼上,那例子不行啊,我不光是一个图片,还有很多表单,我用了upload_5xsoft,里面已经把所有字节读进对象了。

我现在知道提交所有字节的文件流和每个文件的开始地址\文件长度,就是想把文件字节流存到image字段里

比如,知道服务器一个文件 d:/test.gif

我得到这个文件流,怎么存入image字段

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http://www.aspxhome.com/asp/examples/20079/7721.htm
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