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Dim dt As New DataTable '明细(select语句)
Dim dtSum As New DataTable 'group by 取汇总 只有一行(select .... group by ...)
Dim newRow As DataRow = dt.NewRow
newRow.ItemArray = dtSum.Rows(1).ItemArray
dt.Rows.Add(newRow)'可能会列数不一样,不过可以在select ... group by 语句中处理
DataGridView1.DataSource = dt