en Source Else rs.Open Source,
Conn End If vv = rs.Fields(0).Value Set adoOpenRecordset = rs Exit
Function errh: If Err.Number = -2147467259 Then Time Out Lock by
Others If tryTimes $#@60; 2 Then tryTimes = tryTimes +
1 Err.Clear Resume Else Set adoOpenRecordset = Nothing End
If Else Set adoOpenRecordset = Nothing End If End Function
如果是乐观锁定呢，如果有Concurrency的错误时，它会在Update时才有错，而我们使用的方式是先CancelUpdate後再使用Resync
AffectCurrent来Refresh Current
Record，而後再把Update的程序再重新执行一次，如下：但要注意的是，要使用Client端的Cursor 要不然，Server端的Cursor是不支援这个Resync
Method的
Option Explicit Private cn As ADODB.Connection Private rs
As ADODB.Recordset
Private Sub Form_Load() Dim connstr As String Dim ans As Integer,
errstr As String, sql As String Set cn = New ADODB.Connection connstr =
"Data Source=ACCOUNT;UID=sa;PWD=;Initial Catalog=NKIUAcc" cn.Provider =
"SQLOLEDB" cn.ConnectionString = connstr cn.Open cn.CommandTimeout =
5
sql = "Select * from TESTTAB" Set rs = adoOpenRecordset(cn, sql, atClient,
乐观) 要用Client端Cursor cn.BeginTrans If rs Is Nothing
Then cn.RollbackTrans Else Call UpdateRtn End If If Err.Number =
0 Then cn.CommitTrans Else cn.RollbackTrans End If
End Sub
Private Sub UpdateRtn() Dim ntx As Integer On Error Resume Next Do
While True rs!f1 = "q" rs.Update If Err.Number = 0 Then Exit
Do Else If Err.Number = -2147217864 Then 发生Concurrency错误 If ntx $#@60;
2 Then ntx = ntx + 1 Err.Clear rs.CancelUpdate rs.Resync
adAffectCurrent 重新Refresh Current Record Else Exit Do End
If Else Exit Do End If End If Loop On Error GoTo 0 End
Sub
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