'*************************************************************
'放入常用函数模块中
Public Function SavePicToDB(FileName As String, fld As ADODB.Field) As Boolean
'将图形文件存入数据库
'输入参数:
'fileName:图形文件名称
'fld:存储的字段名称 Dim nLenLeft As Long
Dim nChunkSize As Long
Dim mPicFile As Scripting.File
Dim mFileBuffer() As Byte
Dim varChunk As Variant
Dim lFso As New FileSystemObject
Dim ConChunkSize As Long
ConChunkSize = 32768
If fld.Type <> adLongVarBinary Then
MsgBox "该字段不是用来存储图形,请检查!", vbCritical, "匹配错误"
SavePicToDB = False
Exit Function
End If
If Not lFso.FileExists(FileName) Then
MsgBox "不存在该文件!", vbCritical, "文件错误"
SavePicToDB = False
Exit Function
End If
Set mPicFile = lFso.GetFile(FileName)
nChunkSize = mPicFile.Size
ReDim mFileBuffer(nChunkSize - 1)
Open FileName For Binary As #1
Get #1, , mFileBufferfld.AppendChunk mFileBuffer Close #1
SavePicToDB = True
End Function
'放入常用函数模块中
Public Function SavePicToDB(FileName As String, fld As ADODB.Field) As Boolean
'将图形文件存入数据库
'输入参数:
'fileName:图形文件名称
'fld:存储的字段名称 Dim nLenLeft As Long
Dim nChunkSize As Long
Dim mPicFile As Scripting.File
Dim mFileBuffer() As Byte
Dim varChunk As Variant
Dim lFso As New FileSystemObject
Dim ConChunkSize As Long
ConChunkSize = 32768
If fld.Type <> adLongVarBinary Then
MsgBox "该字段不是用来存储图形,请检查!", vbCritical, "匹配错误"
SavePicToDB = False
Exit Function
End If
If Not lFso.FileExists(FileName) Then
MsgBox "不存在该文件!", vbCritical, "文件错误"
SavePicToDB = False
Exit Function
End If
Set mPicFile = lFso.GetFile(FileName)
nChunkSize = mPicFile.Size
ReDim mFileBuffer(nChunkSize - 1)
Open FileName For Binary As #1
Get #1, , mFileBufferfld.AppendChunk mFileBuffer Close #1
SavePicToDB = True
End Function
'读写二进制数据(流)
'函数名:AdoStream
'参数: M_Conn ADODB连接,TabName 目标数据表,FldName 目标字段,WhereStr 更新条件,
' FileName 源文件名或由流生成的文件名,RsStyle 记录集的操作类型.W:File to Recode,R:Recode to File
'返回值:
'例: CALL AdoStream(P_Cnn,"AchGoods","GdsPhoto","Where gdsid='001'","C:\Tmp.Bmp","W")Public Function AdoStream(M_Conn As ADODB.Connection, _
TabName As String, _
FldName As String, _
Optional WhereStr As String = "", _
Optional Filename As String, _
Optional RsStyle As SmRsType = RsWrite) As String
Dim StrSql As String
Dim TmpFileName As String
Dim Rs As New ADODB.Recordset
Dim AdoSem As New ADODB.Stream
Dim ReturnVal As String
Dim WorkPath As String
Dim RsType As Long
Dim RsStyleStr As String
On Error Resume Next
WorkPath = App.Path
If Right$(WorkPath, 1) <> "\" Then WorkPath = WorkPath & "\"
ReturnVal = ""
AdoSem.Type = adTypeBinary '流数据类型
AdoSem.Open '打开流
'/-----------------------------------------------------------
'将流写入记录集
RsType = RsStyle
RsStyleStr = Choose(RsType, "W", "R")
If RsStyleStr = "W" Then
If Left$(Trim$(UCase$(WhereStr)), Len("where")) <> UCase$("where") Then WhereStr = " Where " & Trim$(WhereStr)
StrSql = "Select Top 1 [" & TabName & "].[" & FldName & "] From [" & TabName & "] " & WhereStr
Set Rs = RsOpen(M_Conn, StrSql, False) '连接式记录集
If Not (Rs.EOF And Rs.BOF) Then
Rs.MoveFirst
AdoSem.LoadFromFile Filename '将文件LOAD到流
DoEvents
Rs.Fields(FldName).AppendChunk AdoSem.Read
Rs.Update
End If
AdoStream = ""
ElseIf RsStyle = "R" Then
'/将流从记录集中取出
If Len(Trim$(Filename)) = 0 Then Filename = "TmpFile.Bmp"
If Len(Trim$(Dir$(TmpFileName, vbNormal + vbHidden))) > 0 Then Kill Filename
If Left$(Trim$(UCase$(WhereStr)), Len("where")) <> UCase$("where") Then WhereStr = " Where " & Trim$(WhereStr)
StrSql = "Select Top 1 [" & TabName & "].[" & FldName & "] From [" & TabName & "] " & WhereStr
Set Rs = RsOpen(M_Conn, StrSql)
If Not (Rs.EOF And Rs.BOF) Then
Rs.MoveFirst
If Not (IsNull(Rs.Fields(FldName))) Then
TmpFileName = WorkPath & Filename
AdoSem.Write Rs.Fields(FldName).GetChunk(Rs.Fields(FldName).ActualSize)
DoEvents
AdoSem.SaveToFile TmpFileName, IIf(Len(Trim$(Dir$(TmpFileName, vbNormal + vbHidden))) > 0, adSaveCreateOverWrite, adSaveCreateNotExist)
AdoStream = TmpFileName
Else
AdoStream = ""
End If
Else
AdoStream = ""
End If
End If
AdoSem.Close: Set AdoSem = Nothing
Rs.Close: Set Rs = Nothing
Err.Clear
End Function
[name] varchar(50),
[photo] image NULL
)
GOCREATE PROCEDURE sp_InsertPhoto
@name AS VARCHAR(50),
@image AS IMAGE
AS
INSERT INTO Photos ([name], [photo])
VALUES (@name, @image)
GO