临时文件解决方案

临时文件
VB把文件从IMAGE字段中读到文件中。

Sub   loadpic(IndexNumber   As   Long)
Dim   DcnNWind   As   New   ADODB.Connection
Dim   rs   As   ADODB.Recordset
Set   rs   =   New   ADODB.Recordset
DcnNWind.CursorLocation   =   adUseClient
DcnNWind.Open   "Provider=SQLOLEDB.1;Integrated   Security=SSI;Persist   Security   Info=False;Initial   Catalog=CUSTOM;Data   Source=SERVER "
rs.CursorType   =   adOpenKeyset
rs.LockType   =   adLockOptimistic
rs.Open   "CustomInfo ",   DcnNWind,   ,   adCmdTable
rs.Move   (IndexNumber)
Call   BlobToFile(rs.Fields( "Image "),   "c:\windows\temp\tmp.bmp ",   rs.Fields( "Image ").ActualSize)
End   Sub

Private   Sub   BlobToFile(fld   As   ADODB.Field,   FileName   As   String,   Optional   ChunkSize   As   Long   )
Dim   fnum   As   Integer,   bytesLeft   As   Long,   bytes   As   Long
Dim   tmp()   As   Byte
If   (fld.Attributes   And   adFldLong)   =   0   Then
Err.Raise   1001,   ,   "Field   doesn 't   support   the   GetChunk   method. "
End   If
If   Dir$(FileName)   <>   " "   Then   Kill   FileName
fnum   =   FreeFile
Open   FileName   For   Binary   As   fnum
bytesLeft   =   fld.ActualSize
Do   While   bytesLeft
bytes   =   bytesLeft
If   bytes   >   ChunkSize   Then   bytes   =   ChunkSize
tmp   =   fld.GetChunk(bytes)
Put   #fnum,   ,   tmp
bytesLeft   =   bytesLeft   -   bytes
Loop
Close   #fnum
End   Sub


临时文件，以下是把图片生成临时文件的，不知道有没有其他方法不生成临时文件？但要能打开这个文件！


[解决办法]
不生成文件又要“打开文件”，很费劲的理解结果好像是显示这个图像吧

添加一个Data数据控件,设置它的DatabaseName和RecordSource属性，
添加Image控件用来显示图片，设置它的DataSource和DataField属性。
就可以显示你要的数据了，什么代码也不用。