vb 实时错误‘91’对象变量或 With block变量没有设置
大家帮我看看这段代码有什么问题,为什么老是提示“vb 实时错误‘91’对象变量或 With 块变量没有设置”。
Public Function ConnectString() _
As String
'returns a DB ConnectString
'ConnectString = "FileDSN=ticket.dsn;UID=sa;PWD="
ConnectionString = "Driver={sql server};server=WHUT_JSJ_ROC;uid=sa;pwd=;database=ticket"
End Function
Public Function ExecuteSQL(ByVal SQL _
As String, MsgString As String) _
As ADODB.Recordset
'executes SQL and returns Recordset
Dim cnn As ADODB.Connection
Dim rst As ADODB.Recordset
Dim sTokens() As String
On Error GoTo ExecuteSQL_Error
sTokens = Split(SQL)
Set cnn = New ADODB.Connection
cnn.Open ConnectString
If InStr("INSERT,DELETE,UPDATE", _
UCase$(sTokens(0))) Then
cnn.Execute SQL
MsgString = sTokens(0) & _
" query successful"
Else
Set rst = New ADODB.Recordset
rst.Open Trim$(SQL), cnn, _
adOpenKeyset, _
adLockOptimistic
'rst.MoveLast 'get RecordCount
Set ExecuteSQL = rst
MsgString = "查询到" & rst.RecordCount & _
" 条记录 "
End If
ExecuteSQL_Exit:
Set rst = Nothing
Set cnn = Nothing
Exit Function
ExecuteSQL_Error:
MsgString = "查询错误: " & _
Err.Description
Resume ExecuteSQL_Exit
End Function