从某浪开始搬家，第二篇

使用wincc时，如果需要判断附带的sql server是否有某个数据库，可以使用下面的代码，实际上这个应该属于IT行业的内容。

Sub OnClick(ByVal Item)          
Dim ors,conn,con,ssql,ocom
Dim PCName
PCName=HMIRuntime.Tags("@LocalMachineName").Read
con="Provider = SQLOLEDB.1;password = sa;user id = sa;Initial Catalog =master;Data Source = " & PCName & "\WINCC"
''con="Provider = SQLOLEDB.1;password = sa;user id = sa;Data Source = " & PCName & "\WINCC"

Set conn=CreateObject("ADODB.Connection")
conn.ConnectionString=con
conn.Cursorlocation=3
conn.open

ssql="select * from master.dbo.sysdatabases where [name] ='MyDataBase'"
''ssql="select Name from dbo.sysdatabases where Name ='MyDataBase'"
Set ors=CreateObject("ADODB.RecordSet")
Set ocom=CreateObject("ADODB.Command")
Set ocom.activeconnection=conn
ocom.CommandType=1
ocom.CommandText=ssql
Set ors=ocom.Execute

If ors.recordcount>0 Then
   Msgbox "MyDataBase已经存在，无需创建"
Else
   Msgbox "MyDataBase不存在"
End If
Set ors=Nothing
conn.close
Set conn=Nothing

End Sub