Dim i = 2
Do While True
i += 1
If IsDBNull(TmDataSet.T.Rows(0)(i)) = True Then Exit Do
Dim new_t As New train
new_t.id = TmDataSet.T.Rows(0)(i)
Dim j = 0
Do Until IsDBNull(TmDataSet.T.Rows(j + 1)(i))
j += 1
Do Until (TmDataSet.T.Rows(j)(i) <> -1)
j += 1
Loop
If IsDBNull(TmDataSet.T.Rows(j + 1)(i)) Then Exit Do
Dim new_st As New station
new_st.t = TmDataSet.T.Rows(j)(i)
new_st.name = TmDataSet.T.Rows(j)(1)
new_st.id = TmDataSet.T.Rows(j)(2)
new_st.id_t = new_st.id.ToString & new_st.t
Dim new_st2 As New station
Do Until (TmDataSet.T.Rows(j + 1)(i) <> -1)
j += 1
Loop
new_st2.t = TmDataSet.T.Rows(j + 1)(i)
new_st2.name = TmDataSet.T.Rows(j + 1)(1)
new_st2.id = TmDataSet.T.Rows(j + 1)(2)
new_st2.id_t = new_st2.id.ToString & new_st2.t
Dim list As New List(Of station)
list.Add(new_st)
list.Add(new_st2)
new_t.st.Add(list)
Loop
per_network.Add(new_t)
Loop
‘network = per_network的深层副本
vb>>>我只是想将per_network的内容复制到网络,我尝试过ToList方法,但它是浅拷贝而且无法执行克隆方法我根本没有得到它
您可以创建一个扩展方法,在该方法中序列化对象只是为了再次反序列化它.这将使用它自己的引用创建一个新对象,从而创建一个深层复制.
原文链接：https://www.f2er.com/vb/255875.htmlPublic Module Extensions
<System.Runtime.CompilerServices.Extension()> _
Public Function DeepCopy(Of T)(ByVal Obj As T) As T
If Obj.GetType().IsSerializable = False Then Return Nothing
Using MStream As New MemoryStream
Dim Formatter As New BinaryFormatter
Formatter.Serialize(MStream,Obj)
MStream.Position = 0
Return DirectCast(Formatter.Deserialize(MStream),T)
End Using
End Function
End Module
现在你可以打电话：
Dim network As List(Of train) = per_network.DeepCopy()
编辑：
这些是我上面代码的必需导入：
Imports System.IO Imports System.Runtime.Serialization.Formatters.Binary