刚接触wincc，下面脚本是根据帮助文档VB实例修改，但读取不到归档内容，系统内置报警控件中能读到数据，请大神指点。
'1.1CreateconnectionstringforADOaccess
DimProviderName
DimCatalogName
DimDataSourceName
DimConnectionString
DimCommandString
Dimsnam1,Rtname
DimServerName1
SetServerName1=HMIRuntime.Tags("@ServerName")
ServerName1.Read
DimDatasourceNameRT
SetDatasourceNameRT=HMIRuntime.Tags("@DatasourceNameRT")
DatasourceNameRT.Read
Rtname=DatasourceNameRT.Value
snam1=ServerName1.Value
ConnectionString="provider=WinCCOLEDBProvider.1;catalog="&Rtname&";datasource="&snam1&"\WinCC"
'1.2Definecommandstringforaccess(relativetimerange,last10minutes)
CommandString="ALARMVIEW:Select*fromalgviewchtWHEREDateTime>'-11-3000:00:00.000'"
DimDBConnection
DimDBCommand
DimDBRecordset
'2.1Openconnection
'HMIRuntime.Trace"beforeopenconnection"&vbNewLine
SetDBConnection=CreateObject("ADODB.Connection")
DBConnection.ConnectionString=ConnectionString
DBConnection.CursorLocation=3
DBConnection.open
SetDBRecordset=CreateObject("ADODB.Recordset")
'2.2Executecommand
'HMIRuntime.Trace"beforeexecutecommand"&vbNewLine
SetDBCommand=CreateObject("mand")
mandType=1
DBCommand.ActiveConnection=DBConnection
mandText=CommandString
SetDBRecordset=DBCommand.Execute
DimlngCount
DimlngValue,aa
'2.3Recordstructureandfirstrecorddata(test)
lngCount=DBRecordset.Fields.Count
aa=DBRecordset.RecordCount
HMIRuntime.Trace"RecordSet.Field.Count="&lngCount&vbNewLine
HMIRuntime.Trace"RecordSet.RecordCount="&aa&vbNewLine
If(aa>0)Then
DBRecordset.movefirst
Else
HMIRuntime.Trace"Selectionreturnednofields"&vbNewLine
EndIf
'4.1Cleanup
DBRecordset.Close
SetDBRecordset=Nothing
SetDBCommand=Nothing
DBConnection.Close
SetDBConnection=Nothing
HMIRuntime.Trace"Connectionclosedagain"&vbNewLine
问题补充：
数据库已经连接上，脚本调试输出如图，显示库中无数据。
图片说明：
悬赏西币:5 | 解决时间：-12-07 09:46:25 | 提问者：SHUREN2 - 新生  第1级
问题ID：179378
wincc通过vb如何读取mysql_wincc如何通过VB脚本读取报警数据库归档内容-工业支持中心-西门子中国...
