我用下面的代码，只能导入，不能过滤掉重复的客户

Dim dlg As New OpenFileDialog
dlg.Filter = "Excel文件|*.xlsx"
If dlg.ShowDialog =DialogResult.OK Then
    For Each fl As String In dlg.FileNames
        Dim mg As New Merger
        mg.SourcePath = fl
        mg.Format = "Excel"  \'指定要导入的格式
        mg.SourceTableName = "Sheet1$" \'指定要合并的表
        mg.DataTableName = "客户表" \'指定接收数据的表
        mg.Merge()
    Next
DataTables("客户表").Save()
End If

找客服说，用合并数据

Dim Book As New XLS.Book("c:\\test\\订单.xls")
Dim Sheet As XLS.Sheet = Book.Sheets(0)
Tables("订单").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
Dim nms() As String = {"编号","产品","客户","雇员","单价","折扣","数量","日期"}
\'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("订单").Find("编号 = \'" & bh & "\'") Is Nothing Then \'如果不存在同编号的订单
        Dim r As Row = Tables("订单").AddNew()
        For m As Integer = 0 To nms.Length - 1
            r(nms(m)) = Sheet(n,m).Value
        Next
    End If
Next
Tables("订单").ResumeRedraw()

是不是要把 两个代码放在一起用。如何使用，不会搞了，望老师指导

mark 合并数据

Dim dlg As New OpenFileDialog
dlg.Filter = "Excel文件|*.xls;*.xlsx"
If dlg.ShowDialog =DialogResult.OK Then
    Dim t As Table = Tables("表B")
    t.StopRedraw()
    Dim Book As New XLS.Book(dlg.FileName)
    Dim Sheet As XLS.Sheet = Book.Sheets(0)
    For n As Integer = 1 To Sheet.Rows.Count -1
        Dim r As DataRow = t.DataTable.Find("第一列 = \'" & sheet(n, 0).text & "\'")
        If r Is Nothing Then r = t.DataTable.AddNew()
        For i As Integer = 0 To sheet.Cols.Count -1
            Dim cname As String = sheet(0, i).text
            If t.Cols.Contains(cname) Then
                r(cname) = sheet(n, i).Text
            End If
        Next
    Next
    t.ResumeRedraw()
End If

命令窗口，或者做一个按钮

http://www.foxtable.com/webhelp/scr/1840.htm