此主题相关图片如下:qq图片20161210010833.png此主题相关图片如下:qq图片20161210010941.pngDim dr As DataRow = e.DataRowDim dt As DataTable = DataTables("光缆明细")If e.DataCol.Name = "光缆" Then dr("未发盘数") = dt.Compute("Count([光缆])", "上锁 = False")End If
我想统计光缆明细中各光缆型号的未发盘数,请问这个统计代码应该怎样写?