Dim Book As New XLS.Book("c:\reports\test.xls")
Dim Sheet As XLS.Sheet = Book.Sheets(0)
Tables("表A").StopRedraw()
'注意以下数组中列名称的顺序,必须和Excel表中的列顺序一致
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Dim nms() As String = {"第一列","第二列","第三列"}
'注意下面的循环变量从1开始,而不是从0开始,因为Excel表的第一行是标题
For n As Integer = 1 To Sheet.Rows.Count -1
Dim bh As String = sheet(n,0).Text
If DataTables("表A").Find("第一列 = '" & bh & "'") Is Nothing Then '如果不存在同编号的订单
Dim r As Row = Tables("表A").AddNew()
For m As Integer = 0 To nms.Length - 1
r(nms(m)) = Sheet(n,m).Value
Next
End If
Next
Tables("表A").ResumeRedraw()