[求助]求助Compute的用法,外部数据源,我的代码提示无效的聚合函数Sum() Post By:2013/5/31 15:18:00 [只看该作者]
代码如下:
Dim dt As DataTable Dim cmd As New SQLCommand cmd.C cmd.CommandText = "Select * From {发货单} " '注意要包括主键列 dt= cmd.ExecuteReader() '注意可选参数设置为True Dim sum As Integer=dt.Compute("Sum(数量)") Output.Show(Sum)