将图片保存到数据库以及从数据库显示图片的ADO代码

发布时间:2007年07月08日      浏览次数:3339 次
<!-- #include file=fupload.inc-->
<%
if Request.ServerVariables("REQUEST_METHOD") = "POST" then
'保存图片
Dim Fields
UploadSizeLimit=100000
Set Fields = GetUpload()
dim Field
For Each Field In Fields.Items

if Field.name="louhao" then
louhao=BinaryToString(Field.value)
end if

if Field.name="file1" then
file1=field.FileName '图片名称
fileType1=field.ContentType '图片类型
filevalue1=field.value '图片值
end if

next



sql="select * from loupan "
rs.open sql,conn,1,3

rs.addnew
rs("louhao")=louhao

if file1<>"" and tps>=1 then
rs("file1")=file1
rs("filetype1")=filetype1
rs("filevalue1").appendchunk filevalue1 '保存图片
end if

rs.update
response.write"<script language='javascript'>alert('资料添加成功!');</script>"
end if
%>


-------------------------------------------------------------------------
fupload.inc文件的代码如下:
-------------------------------------------------------------------------




<SCRIPT RUNAT=SERVER LANGUAGE=VBSCRIPT>
'Sample multiple binary files upload via ASP - upload include
'c1997-1999 Antonin Foller, PSTRUH Software, http://www.pstruh.cz
'The file is part of ScriptUtilities library
'The file enables http upload to ASP without any components.
'But there is a small problem - ASP does not allow save binary data to the disk.
' So you can use the upload for :
' 1. Upload small text (or HTML) files to server-side disk (Save the data by filesystem object)
' 2. Upload binary/text files of any size to server-side database (RS("BinField") = Upload("FormField").Value


'Limit of upload size
Dim UploadSizeLimit

'********************************** GetUpload **********************************
'This function reads all form fields from binary input and returns it as a dictionary object.
'The dictionary object containing form fields. Each form field is represented by six values :
'.Name name of the form field (<Input Name="..." Type="File,...">)
'.ContentDisposition = Content-Disposition of the form field
'.FileName = Source file name for <input type=file>
'.ContentType = Content-Type for <input type=file>
'.Value = Binary value of the source field.
'.Length = Len of the binary data field
Function GetUpload()
Dim Result
Set Result = Nothing
If Request.ServerVariables("REQUEST_METHOD") = "POST" Then 'Request method must be "POST"
Dim CT, PosB, Boundary, Length, PosE
CT = Request.ServerVariables("HTTP_Content_Type") 'reads Content-Type header
If LCase(Left(CT, 19)) = "multipart/form-data" Then 'Content-Type header must be "multipart/form-data"
'This is upload request.
'Get the boundary and length from Content-Type header
PosB = InStr(LCase(CT), "boundary=") 'Finds boundary
If PosB > 0 Then Boundary = Mid(CT, PosB + 9) 'Separetes boundary
Length = CLng(Request.ServerVariables("HTTP_Content_Length")) 'Get Content-Length header
if "" & UploadSizeLimit<>"" then
UploadSizeLimit = clng(UploadSizeLimit)
' if Length > UploadSizeLimit then
' ' on error resume next 'Clears the input buffer
' ' response.AddHeader "Connection", "Close"
' ' on error goto 0
' Request.BinaryRead(Length)
' Err.Raise 2, "GetUpload", "Upload size " & FormatNumber(Length,0) & "B exceeds limit of " & FormatNumber(UploadSizeLimit,0) & "B"
' exit function
' end if
end if

If Length > 0 And Boundary <> "" Then 'Are there required informations about upload ?
Boundary = "--" & Boundary
Dim Head, Binary
Binary = Request.BinaryRead(Length) 'Reads binary data from client

'Retrieves the upload fields from binary data
Set Result = SeparateFields(Binary, Boundary)
Binary = Empty 'Clear variables
Else
Err.Raise 10, "GetUpload", "Zero length request ."
End If
Else
Err.Raise 11, "GetUpload", "No file sent."
End If
Else
Err.Raise 1, "GetUpload", "Bad request method."
End If
Set GetUpload = Result
End Function

'********************************** SeparateFields **********************************
'This function retrieves the upload fields from binary data and retuns the fields as array
'Binary is safearray of all raw binary data from input.
Function SeparateFields(Binary, Boundary)
Dim PosOpenBoundary, PosCloseBoundary, PosEndOfHeader, isLastBoundary
Dim Fields
Boundary = StringToBinary(Boundary)

PosOpenBoundary = InstrB(Binary, Boundary)
PosCloseBoundary = InstrB(PosOpenBoundary + LenB(Boundary), Binary, Boundary, 0)

Set Fields = CreateObject("Scripting.Dictionary")

Do While (PosOpenBoundary > 0 And PosCloseBoundary > 0 And Not isLastBoundary)
'Header and file/source field data
Dim HeaderContent, FieldContent
'Header fields
Dim Content_Disposition, FormFieldName, SourceFileName, Content_Type
'Helping variables
Dim Field, TwoCharsAfterEndBoundary
'Get end of header
PosEndOfHeader = InstrB(PosOpenBoundary + Len(Boundary), Binary, StringToBinary(vbCrLf + vbCrLf))

'Separates field header
HeaderContent = MidB(Binary, PosOpenBoundary + LenB(Boundary) + 2, PosEndOfHeader - PosOpenBoundary - LenB(Boundary) - 2)

'Separates field content
FieldContent = MidB(Binary, (PosEndOfHeader + 4), PosCloseBoundary - (PosEndOfHeader + 4) - 2)

'Separates header fields from header
GetHeadFields BinaryToString(HeaderContent), Content_Disposition, FormFieldName, SourceFileName, Content_Type

'Create one field and assign parameters
Set Field = CreateUploadField()
Field.Name = FormFieldName
Field.ContentDisposition = Content_Disposition
Field.FilePath = SourceFileName
Field.FileName = GetFileName(SourceFileName)
Field.ContentType = Content_Type
Field.Value = FieldContent
Field.Length = LenB(FieldContent)


Fields.Add FormFieldName, Field

'Is this ending boundary ?
TwoCharsAfterEndBoundary = BinaryToString(MidB(Binary, PosCloseBoundary + LenB(Boundary), 2))
'Binary.Mid(PosCloseBoundary + Len(Boundary), 2).String
isLastBoundary = TwoCharsAfterEndBoundary = "--"
If Not isLastBoundary Then 'This is not ending boundary - go to next form field.
PosOpenBoundary = PosCloseBoundary
PosCloseBoundary = InStrB(PosOpenBoundary + LenB(Boundary), Binary, Boundary )
End If
Loop
Set SeparateFields = Fields
End Function

'********************************** Utilities **********************************
Function BinaryToString(str)
strto = ""
for i=1 to lenb(str)
if AscB(MidB(str, i, 1)) > 127 then
strto = strto & chr(Ascb(MidB(str, i, 1))*256+Ascb(MidB(str, i+1, 1)))
i = i + 1
else
strto = strto & Chr(AscB(MidB(str, i, 1)))
end if
next
BinaryToString=strto
End Function

Function StringToBinary(String)
Dim I, B
For I=1 to len(String)
B = B & ChrB(Asc(Mid(String,I,1)))
Next
StringToBinary = B
End Function

'Separates header fields from upload header
Function GetHeadFields(ByVal Head, Content_Disposition, Name, FileName, Content_Type)
Content_Disposition = LTrim(SeparateField(Head, "content-disposition:", ";"))
Name = (SeparateField(Head, "name=", ";")) 'ltrim
If Left(Name, 1) = """" Then Name = Mid(Name, 2, Len(Name) - 2)
FileName = (SeparateField(Head, "filename=", ";")) 'ltrim
If Left(FileName, 1) = """" Then FileName = Mid(FileName, 2, Len(FileName) - 2)
Content_Type = LTrim(SeparateField(Head, "content-type:", ";"))
End Function

'Separets one filed between sStart and sEnd
Function SeparateField(From, ByVal sStart, ByVal sEnd)
Dim PosB, PosE, sFrom
sFrom = LCase(From)
PosB = InStr(sFrom, sStart)
If PosB > 0 Then
PosB = PosB + Len(sStart)
PosE = InStr(PosB, sFrom, sEnd)
If PosE = 0 Then PosE = InStr(PosB, sFrom, vbCrLf)
If PosE = 0 Then PosE = Len(sFrom) + 1
SeparateField = Mid(From, PosB, PosE - PosB)
Else
SeparateField = Empty
End If
End Function

'Separetes file name from the full path of file
Function GetFileName(FullPath)
Dim Pos, PosF
PosF = 0
For Pos = Len(FullPath) To 1 Step -1
Select Case Mid(FullPath, Pos, 1)
Case "/", "\": PosF = Pos + 1: Pos = 0
End Select
Next
If PosF = 0 Then PosF = 1
GetFileName = Mid(FullPath, PosF)
End Function
</SCRIPT>
<SCRIPT RUNAT=SERVER LANGUAGE=JSCRIPT>
//The function creates Field object.
function CreateUploadField(){ return new uf_Init() }
function uf_Init(){
this.Name = null
this.ContentDisposition = null
this.FileName = null
this.FilePath = null
this.ContentType = null
this.Value = null
this.Length = null
}
</SCRIPT>
========================================================================
从数据库显示图片show.asp
======================================================================
<!--#include file="../public/opendb.asp"-->
<%
if request("id")<>"" then
set conn=opendb("oabusy","conn","accessdsn")
Set rs=Server.CreateObject("ADODB.recordset")
sql="select photo from personinf where id=" & trim(request("id")) &""
rs.open sql,conn,1,1
Response.ContentType = "image/gif"
Response.BinaryWrite rs("photo").getChunk(7500000)
end if
%>
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