Upload | data | Database First: Upload a single picture to the database
This question is not a new problem, there are a lot of tutorials online, but most of the people to give the fish, and not to give people to fishing, after hard data collection, thinking, debugging, finishing, I have basically made this problem from the principle of clear, now based on my own understanding, on the basis of the sample procedure, to explain, I hope to be able to some netizens (more than I:-)) help.
I ask you to correct the mistakes and the bad.
The use of Stream objects in the program refers to the "transformation HTTP Upload Program Version 2.0" in the code, here to the old farmer and Liang Tao without fear to express my heartfelt thanks and sincere respect.
I'd like to step up and start today with a simple, single picture file saved to the database.
This example consists of three ASP files and one database (a table), all in the same directory.
1, Tblimage table structure (ACCESS 2000)
SN AutoNumber serial Number
Content-type Text Picture Type
Image OLE Object picture data
2, simpleimagetodata.asp: Upload the form and save the picture to the Database Code section, the main document.
<%@ Language=vbscript%>
<% Option Explicit%>
<%
' precipitates the file name from a full path
function Getfilenamefrompath (strpath)
Getfilenamefrompath = Mid (Strpath,instrrev (strpath, "\") +1)
End Function
' Define the database connection string
Dim cnstr
Cnstr = "Driver={microsoft Access driver (*.mdb)};d bq=" & Server. MapPath ("./upload.mdb")
%>
<HTML>
<HEAD>
<title> single image Save to database </title>
<meta http-equiv= "Content-type" content= "text/html; charset=gb2312 ">
</HEAD>
<body>
<p><a href= "simpleimagetodata.asp" > Upload picture </a>
<a href= "showimagelistfromdata.asp" > Show pictures </a>
<%
If request. ServerVariables ("request_method") = "POST" Then
Dim scome, SGo, Bindata, strdata
Dim PosB, PosE, POSSB, Posse
Dim Bincrlf
Dim strpath, strFileName, Strcontenttype
Bincrlf = ChrB &CHRB (10) ' defines a single byte carriage return line feed
Set scome = Server. CreateObject ("ADODB.stream")
Scome.type = 1 ' Specifies the return data type adtypebinary=1,adtypetext=2
Scome.mode = 3 ' specifies open mode admoderead=1,admodewrite=2,admodereadwrite=3
Scome.open
Scome.write request. BinaryRead (Request. TotalBytes)
scome.position = 0
Bindata = Scome.read
' Response. BinaryWrite bindata ' debug with: Show all submitted data
' Response. Write "
Set sGo = Server. CreateObject ("ADODB.stream")
Sgo.type = 1
Sgo.mode = 3
Sgo.open
PosB = 1
PosB = INSTRB (POSB,BINDATA,BINCRLF)
PosE = INSTRB (POSB+1,BINDATA,BINCRLF)
' Response. Write PosB & "|" & PosE & "<br>"
Scome.position = posb+1
Scome.copyto sgo,pose-posb-2
sgo.position = 0
Sgo.type = 2
Sgo.charset = "gb2312"
Strdata = Sgo.readtext
Sgo.close
' Response. Write strdata & "
POSSB = 1
POSSB = InStr (Possb,strdata, "filename=" "") + len ("Filename=" "")
Posse = InStr (Possb,strdata, "" "")
If Posse > Possb Then
strpath = Mid (STRDATA,POSSB,POSSE-POSSB)
' Response. Write "Local Path:" & strpath & "<br>"
' Response. Write "FileName:" & Getfilenamefrompath (strpath) & "<br>"
PosB = PosE
PosE = INSTRB (POSB+1,BINDATA,BINCRLF)
' Response. Write PosB & "|" & PosE & "<br>"
Sgo.type = 1
Sgo.mode = 3
Sgo.open
Scome.position = PosB
Scome.copyto sgo,pose-posb-1
sgo.position = 0
Sgo.type = 2
Sgo.charset = "gb2312"
Strdata = Sgo.readtext
Sgo.close
Strcontenttype = Mid (strdata,16) ' here because fixed, so omit lookup:-)
' Response. Write "Picture type:" & Strcontenttype & "
PosB = pose+2
PosE = INSTRB (POSB+1,BINDATA,BINCRLF)
' Response. Write PosB & "|" & PosE & "<br>"
Sgo.type = 1
Sgo.mode = 3
Sgo.open
Scome.position = posb+1
Scome.copyto sgo,pose-posb-2
sgo.position = 0
Strdata = Sgo.read
Sgo.close
' Response. Write LenB (strdata) & "<br>"
Dim cn, RS, SQL
Set cn = Server. CreateObject ("Adodb.connection")
cn. Open cnstr
Set rs = server. CreateObject ("Adodb.recordset")
sql = "SELECT * FROM Tblimage"
Rs. Open sql,cn,1,3
Rs. AddNew
Rs. Fields ("Content-type"). Value = Strcontenttype
Rs. Fie
