这不是一个很好的解决方法,但我必须经过这个过程来解决表格中的255字段限制。总之,我结束了导入步骤,是
- 读取文件的第一行作为一个InputStream
- 分割线来获得字段名,把它们放在一个数据字典表,然后手动标记那些我想要导入
- 使用CREATE TABLE来创建一个新的数据表(只选定字段)与所有设置为TEXT
- 领域的读取文件中的每一行作为一个InputStream
- 斯普利特线获取每个字段的数据
- 使用INSERT INTO到选定字段添加到数据表
繁琐,但它解决了两个问题 - 我不是限于255个字段中输入文件和我可以控制的领域作为数据类型我创造它们。
的代码,如果有人关心,是
Function Layout()
Set db = CurrentDb()
Folder = DLookup("[data folder]", "folder")
Dim FSO As New FileSystemObject
Set flist = FSO.GetFolder(Folder).Files
db.Execute ("delete * from [data dictionary]")
For Each F In flist
FN = Left(F.Name, InStr(F.Name, ".") - 1)
FT = Mid(F.Name, InStr(F.Name, ".") + 1)
If FT <> "csv" Then GoTo Skip
If TestFile(F.path) = "ASCII" Then
Set instream = FSO.OpenTextFile(F.path, ForReading, , 0)
Else: Set instream = FSO.OpenTextFile(F.path, ForReading, , -1)
End If
header = instream.ReadLine
Data = Split(header, ",")
For i = LBound(Data) To UBound(Data)
SQL = "insert into [data dictionary] ([table], [field], [index]) select "
SQL = SQL & "'" & FN & "','" & Data(i) & "','" & i & "'"
db.Execute SQL
Next i
Skip: Next F
End Function
Function TestFile(ByVal path As String)
Dim buffer As String
Dim InFileNum As Integer
Dim firstByte As Integer
Dim secondByte As Integer
Dim thirdByte As Integer
buffer = String(100, " ")
InFileNum = FreeFile
Open path For Binary Access Read As InFileNum
Get InFileNum, , buffer
Close InFileNum
firstByte = Asc(Mid(buffer, 1, 1))
secondByte = Asc(Mid(buffer, 2, 1))
thirdByte = Asc(Mid(buffer, 3, 1))
If (firstByte = 255 And secondByte = 254) Then
TestFile = "Unicode"
ElseIf (firstByte = 254 And secondByte = 255) Then
TestFile = "Unicode"
ElseIf (firstByte = 239 And secondByte = 187 And thirdByte = 191) Then
TestFile = "Unicode"
Else
TestFile = "ASCII"
End If
End Function
Function import()
Folder = DLookup("[data folder]", "folder")
Set db = CurrentDb()
Dim FSO As New FileSystemObject
Set Tlist = db.OpenRecordset("select [table] from [data dictionary] where ([required]<>'') group by [table]")
Tlist.MoveFirst
Do While Not Tlist.EOF
TN = Tlist.Fields("table").Value
Delete_table (TN)
Set flist = db.OpenRecordset("select * from [data dictionary] where [required]<>'' and [table]='" & TN & "'")
flist.MoveFirst
Text = ""
Do While Not flist.EOF
FN = flist.Fields("Field")
Text = Text & "," & FN & " " & IIf(InStr(FN, "Date") > 0 Or InStr(FN, "_DT") > 0, "DATETIME", "TEXT")
flist.MoveNext
Loop
SQL = "CREATE TABLE " & TN & "(" & Mid(Text, 2) & ")"
db.Execute SQL
path = Folder & "\" & TN & ".csv"
If TestFile(path) = "ASCII" Then
Set instream = FSO.OpenTextFile(path, ForReading, , 0)
Else: Set instream = FSO.OpenTextFile(path, ForReading, , -1)
End If
header = instream.ReadLine
Do While Not instream.AtEndOfStream
Line = parser(instream.ReadLine)
Data = Split(Line, ",")
flist.MoveFirst
Text = ""
Do While Not flist.EOF
n = flist.Fields("index").Value
Text = Text & ",'" & Data(n) & "'"
flist.MoveNext
Loop
SQL = "insert into [" & TN & "] values(" & Mid(Text, 2) & ")"
db.Execute SQL
Loop
Tlist.MoveNext
Loop
x = MultipleCodes()
MsgBox ("done")
End Function
Function parser(S)
parser = S
i = InStr(S, Chr(34))
If i = 0 Then
parser = S
Else
j = InStr(i + 1, S, Chr(34))
T = Mid(S, i + 1, j - i - 1)
T = Replace(T, ",", ";")
parser = Left(S, i - 1) & T & parser(Mid(S, j + 1))
End If
End Function