通过ADO打开一Access表，当设置CursorLocation = adUseClient 后，对表的改写过程变得极慢无比！

[Gujianda]

本人为了让记录对象 RecordSet 能排序，不得不设游标类型为 adOpenDynamic，因此往前不得不设游标位置为：adUseClient。

[Gujianda]

顶一下：数据库在本机上。

[橘子皮...]

Function UrlDecode(ByVal urlcode)
    Dim start, final, length, char, i, butf8, pass
    Dim leftstr, rightstr, finalstr
    Dim b0, b1, bx, blength, position, u, utf8
    On Error Resume Next
    
    b0 = Array(192, 224, 240, 248, 252, 254)
    urlcode = Replace(urlcode, "+", " ")
    pass = 0
    utf8 = -1

    length = Len(urlcode): start = InStr(urlcode, "%"): final = InStrRev(urlcode, "%")
    If start = 0 Or length < 3 Then UrlDecode = urlcode: Exit Function
    leftstr = Left(urlcode, start - 1): rightstr = Right(urlcode, length - 2 - final)

For i = start To final
char = Mid(urlcode, i, 1)
If char = "%" Then
bx = URLDecode_Hex(Mid(urlcode, i + 1, 2))
If bx > 31 And bx < 128 Then
i = i + 2
finalstr = finalstr & ChrW(bx)
ElseIf bx > 127 Then
i = i + 2
If utf8 < 0 Then
butf8 = 1: blength = -1: b1 = bx
For position = 4 To 0 Step -1
If b1 >= b0(position) And b1 < b0(position + 1) Then
blength = position
Exit For
End If
Next
If blength > -1 Then
For position = 0 To blength
b1 = URLDecode_Hex(Mid(urlcode, i + position * 3 + 2, 2))
If b1 < 128 Or b1 > 191 Then butf8 = 0: Exit For
Next
Else
butf8 = 0
End If
If butf8 = 1 And blength = 0 Then butf8 = -2
If butf8 > -1 And utf8 = -2 Then i = start - 1: finalstr = "": pass = 1
utf8 = butf8
End If
If pass = 0 Then
If utf8 = 1 Then
b1 = bx: u = 0: blength = -1
For position = 4 To 0 Step -1
If b1 >= b0(position) And b1 < b0(position + 1) Then
blength = position
b1 = (b1 Xor b0(position)) * 64 ^ (position + 1)
Exit For
End If
Next
If blength > -1 Then
For position = 0 To blength
bx = URLDecode_Hex(Mid(urlcode, i + 2, 2)): i = i + 3
If bx < 128 Or bx > 191 Then u = 0: Exit For
u = u + (bx And 63) * 64 ^ (blength - position)
Next
If u > 0 Then finalstr = finalstr & ChrW(b1 + u)
End If
Else
b1 = bx * &H100: u = 0
bx = URLDecode_Hex(Mid(urlcode, i + 2, 2))
If bx > 0 Then
u = b1 + bx
i = i + 3
Else
If Left(urlcode, 1) = "%" Then
u = b1 + Asc(Mid(urlcode, i + 3, 1))
i = i + 2
Else
u = b1 + Asc(Mid(urlcode, i + 1, 1))
i = i + 1
End If
End If
finalstr = finalstr & Chr(u)
End If
Else
pass = 0
End If
End If
Else
finalstr = finalstr & char
End If
DoEvents
Next
UrlDecode = leftstr & finalstr & rightstr
End Function

[Gujianda]

谢谢楼上这位兄弟，虽然还不知何物，但已收藏。

[clear_zero]

你取出来的时候排好了，不要放到recordset里面排，recordset排序很慢的。尤其里面数据量一大速度非常慢

[Gujianda]

没人回答，分就给 clear_zero 吧。