基本定义部分如下：
Dim constr As String = "uid =GsmGps;pwd =gps;database =GsmGps;server =吴长树"
Dim mycon As New SqlConnection(constr)
Dim mydc As SqlDataAdapter
Dim dbset As New DataSet()
dim id as string ="123456"

mydc = new sqldataadapter("select * from customer where id='"& id &"'",mycon)
mydc.fill(dbset,"customer")

现在如何判定dbset.tables("customer")中的记录总数为0个？

判断一下hasrow

可是当dbset("a")这个表的内容为空时,使用hasrow会报错.我想是不是要使用try...catch...语句来处理