主题：[求助]高速合并

Excel文件没有主键的，建议自己编码解决：

http://www.foxtable.com/help/topics/2334.htm

先查找原来是否有这行，有的话，就更新，没有的话，就增加一行。

查找行：

http://www.foxtable.com/help/topics/0396.htm

例如：

Dim Book As New XLS.Book("c:\test\要合并的文件.xls")
Dim Sheet As XLS.Sheet = Book.Sheets(0)
Tables("订单").StopRedraw()
Dim nms() As String = {"订单编号","产品","客户","雇员","单价","折扣","数量","日期"}
For n As Integer = 1 To Sheet.Rows.Count -1
    Dim dr As DataRow = DataTables("订单").Find("订单编号 = '" & sheet(n,0).Value & "'")
    If dr Is  Nothing Then
        dr = DataTables("订单").AddNew()
    End If
    For m As Integer = 0 To nms.Length - 1
        dr(nms(m)) = Sheet(n,m).Value
    Next
Next
Tables("订单").ResumeRedraw()