Dim t1 As Date = Date.Now
DataTables("拆分效果").StopRedraw
DataTables("拆分效果").datarows.Clear
For Each dr As DataRow In DataTables("原始数据").DataRows
For Each s As String In dr("拆分列").Replace("///","///@").Split("@")
Dim adr As DataRow = DataTables("拆分效果").AddNew
adr("班级") = dr("班级")
adr("拆分列") = s
Next
Next
DataTables("拆分效果").ResumeRedraw
MessageBox.Show("计算结束, 耗时: " & (Date.Now - t1).TotalSeconds & "秒")