数据表合并到一个表时不重现值

你好！

我正在尝试将两个数据表合并为一个.我面临的问题是，当合并仅来自一个表的值时，在第三个表中而不是从第二个表中显示.

Hello!!

I am trying to merge two datatables into one. The problem that i a facing is that when merging values from only one table is showing in the third table not from the second.

Dim dt1 As DataTable = ds.Tables("Mon")
      Dim dt2 As DataTable = ds.Tables("Vcr")
      Dim dtAll As DataTable = dt1.Copy()
      dtAll.Merge(dt2)

请告诉我怎么了..

please tell me what''s wrong ..