Private Declare Function GetTempFileName Lib "kernel32" Alias "GetTempFileNameA" (ByVal lpszPath As String, ByVal lpPrefixString As String, ByVal wUnique As Long, ByVal lpTempFileName As String) As Long Private Declare Function GetTempPath Lib "kernel32" Alias "GetTempPathA" (ByVal nBufferLength As Long, ByVal lpBuffer As String) As Long Private Const MAX_PATH = 260
Private m_DBConn As ADODB.Connection
Private Const BLOCK_SIZE = 10000 注释： Return a temporary file name. Private Function TemporaryFileName() As String Dim temp_path As String Dim temp_file As String Dim length As Long
注释： Get the temporary file path. temp_path = Space$(MAX_PATH) length = GetTempPath(MAX_PATH, temp_path) temp_path = Left$(temp_path, length)
注释： Get the file name. temp_file = Space$(MAX_PATH) GetTempFileName temp_path, "per", 0, temp_file TemporaryFileName = Left$(temp_file, InStr(temp_file, Chr$(0)) - 1) End Function Private Sub Form_Load() Dim db_file As String Dim rs As ADODB.Recordset
注释： Get the database file name. db_file = App.Path If Right$(db_file, 1) <> "" Then db_file = db_file & "" db_file = db_file & "dbpict.mdb"
注释： Open the database connection. Set m_DBConn = New ADODB.Connection m_DBConn.Open _ "Provider=Microsoft.Jet.OLEDB.4.0;" & _ "Data Source=" & db_file & ";" & _ "Persist Security Info=False"
注释： Get the list of people. Set rs = m_DBConn.Execute("SELECT Name FROM People ORDER BY Name", , adCmdText) Do While Not rs.EOF lstPeople.AddItem rs!Name rs.MoveNext Loop
rs.Close Set rs = Nothing End Sub Private Sub Form_Resize() lstPeople.Height = ScaleHeight End Sub
注释： Display the clicked person. Private Sub lstPeople_Click() Dim rs As ADODB.Recordset Dim bytes() As Byte Dim file_name As String Dim file_num As Integer Dim file_length As Long Dim num_blocks As Long Dim left_over As Long Dim block_num As Long Dim hgt As Single
Kill file_name Screen.MousePointer = vbDefault End Sub
Private Sub mnuRecordAdd_Click() Dim rs As ADODB.Recordset Dim person_name As String Dim file_num As String Dim file_length As String Dim bytes() As Byte Dim num_blocks As Long Dim left_over As Long Dim block_num As Long
person_name = InputBox("Name") If Len(person_name) = 0 Then Exit Sub
dlgPicture.Flags = _ cdlOFNFileMustExist Or _ cdlOFNHideReadOnly Or _ cdlOFNExplorer dlgPicture.CancelError = True dlgPicture.Filter = "Graphics Files|*.bmp;*.ico;*.jpg;*.gif"
On Error Resume Next dlgPicture.ShowOpen If Err.Number = cdlCancel Then Exit Sub ElseIf Err.Number <> 0 Then MsgBox "Error " & Format$(Err.Number) & _ " selecting file." & vbCrLf & Err.Description Exit Sub End If
注释： Open the picture file. file_num = FreeFile Open dlgPicture.FileName For Binary Access Read As #file_num
file_length = LOF(file_num) If file_length > 0 Then num_blocks = file_length / BLOCK_SIZE left_over = file_length Mod BLOCK_SIZE
Set rs = New ADODB.Recordset rs.CursorType = adOpenKeyset rs.LockType = adLockOptimistic rs.Open "Select Name, Picture, FileLength FROM People", m_DBConn
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