老师您好！我有个集合空值怎么判断？我用nothing和null 都报错，请指教，谢谢！
Dim brys As List(Of String)
brys = DataTables("ddpsb").GetValues("zzh|zzh_xx|发货日期", "zzh is not null")
For Each bry As String In brys
For Each dr2 As DataRow In DataTables("ddqdb").Select("zzh='" & brys(0) & "'") '找到符合条件的所有记录
Dim s As String = dr2("zzh_yy")
Dim syy As String = Right(s, 2)
' If bry(1) Is Not nothing And syy = bry(1) Then
' Dim dr3 As DataRow = DataTables("临时表").AddNew()
' If dr2.IsNull("清单条码编码") = False Then
' dr3("清单条码编码") = dr2("清单条码编码")
' dr3("发货日期") = bry(2)
' End If
' Else
' Dim dr4 As DataRow = DataTables("临时表").AddNew()
' If dr2.IsNull("清单条码编码") = False Then
' dr4("清单条码编码") = dr2("清单条码编码")
' dr4("发货日期") = bry(2)
' End If
' End If
Next
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Post By：2023/5/15 11:10:00 [只看该作者]
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