Dim Cols1() As String = {"第一列","第二列"} Dim Cols2() As String = {"第一列","第二列"} For Each dr1 As DataRow In DataTables("表A").Select("len(第一列) >= 4") Dim dr2 As DataRow = DataTables("表B").AddNew() For i As Integer = 0 To Cols1.Length -1 dr2(Cols2(i)) = dr1(Cols1(i)) Next Next