主题：[求助]自定义合并多次导入部分数据重复

楼主，可能是筛选条件没有注意到null值的情况。

        Dim s1 As String = sheet(n, 0).Value
        Dim s2 As String = sheet(n, 1).Value
        Dim dr As DataRow = DataTables("表B").Find("(code = '" & s1 & "' or code is null and '" & s1 & "' = '') And  (coding = '" & sheet(n,1).Value & "' or coding is null and '" & s2 & "' = '')")