Visual studio 2010 如何剪切、复制和粘贴扩展树节点?
我有一个c#项目,使用.net framework的4.0版,运行在VS2010上。我创建了一个树视图,其中填充了一些扩展的树节点。我希望用户能够通过上下文菜单或键盘快捷键(而不仅仅是拖放)将这些节点复制、剪切和粘贴到剪贴板 复制时代码运行良好,但当我尝试粘贴这些节点时,会引发以下错误: 无法将“System.IO.MemoryStream”类型的对象强制转换为“Namespace Path.treenodex”类型 这是我的剪切/复制/粘贴方法Visual studio 2010 如何剪切、复制和粘贴扩展树节点?,visual-studio-2010,treeview,c#-4.0,copy-paste,treenode,Visual Studio 2010,Treeview,C# 4.0,Copy Paste,Treenode,我有一个c#项目,使用.net framework的4.0版,运行在VS2010上。我创建了一个树视图,其中填充了一些扩展的树节点。我希望用户能够通过上下文菜单或键盘快捷键(而不仅仅是拖放)将这些节点复制、剪切和粘贴到剪贴板 复制时代码运行良好,但当我尝试粘贴这些节点时,会引发以下错误: 无法将“System.IO.MemoryStream”类型的对象强制转换为“Namespace Path.treenodex”类型 这是我的剪切/复制/粘贴方法 public void Copy() {
public void Copy()
{
Clipboard.SetData("Tree Node Ex", CurrentTreeNode.Clone());
}
public void Paste()
{
CurrentTreeNode.Nodes.Add((TreeNodeEx)Clipboard.GetData("Tree Node Ex"));
}
我怀疑问题与序列化有关,但我尝试实现ISerializable接口和[Serializable]属性,但没有任何效果
有什么建议吗?试试这个:
Clipboard.GetDataObject().GetData(typeof(TreeNodeEx))
试试这个:
Clipboard.GetDataObject().GetData(typeof(TreeNodeEx))
事实证明,在每个扩展树节点上,我都有一个存储额外信息的字典。显然,您无法序列化字典,因此这会阻止任何树节点被序列化
我为这些扩展树节点实现了
ISerializable
,然后将字典转换为两个列表,然后将其转换回反序列化构造函数中的字典。事实证明,每个扩展树节点都有一个存储额外信息的字典。显然,您无法序列化字典,因此这会阻止任何树节点被序列化
public void copy()
{
tempNode = TreeView.SelectedNode;
}
public void paste()
{
TreeView.SelectedNode.Nodes.Add(new TreeNode(tempNode.Text));
tNode = TreeView.SelectedNode.LastNode;
for (int i = 0; i <= tempNode.Nodes.Count - 1; i++)
{
TreeNode NodeClone = (TreeNode)tempNode.Nodes[i].Clone();
tNode.Nodes.Add(NodeClone);
}
public void cut()
{
tempNode = TreeView.SelectedNode;
TreeView.SelectedNode.Remove();
}
我为这些扩展树节点实现了ISerializable
,然后将字典转换为两个列表,然后在反序列化构造函数中将其转换回字典。public void copy()
public void copy()
{
tempNode = TreeView.SelectedNode;
}
public void paste()
{
TreeView.SelectedNode.Nodes.Add(new TreeNode(tempNode.Text));
tNode = TreeView.SelectedNode.LastNode;
for (int i = 0; i <= tempNode.Nodes.Count - 1; i++)
{
TreeNode NodeClone = (TreeNode)tempNode.Nodes[i].Clone();
tNode.Nodes.Add(NodeClone);
}
public void cut()
{
tempNode = TreeView.SelectedNode;
TreeView.SelectedNode.Remove();
}
{
tempNode=TreeView.SelectedNode;
}
公共空白粘贴()
{
TreeView.SelectedNode.Nodes.Add(新树节点(tempNode.Text));
tNode=TreeView.SelectedNode.LastNode;
对于(int i=0;ipublic void copy()
{
tempNode=TreeView.SelectedNode;
}
公共空白粘贴()
{
TreeView.SelectedNode.Nodes.Add(新树节点(tempNode.Text));
tNode=TreeView.SelectedNode.LastNode;
对于(inti=0;i旧东西,但我花了几个小时面对同样的问题,所以下面是有效的方法:
Imports System.Runtime.Serialization
Public Class Form1
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load
Me.TV.Nodes.Clear()
Dim tNode As New TemplateNode()
Me.TV.Nodes.Add(tNode)
For i As Integer = 1 To 5
Dim newNode As New TemplateNode()
tNode.Nodes.Add(newNode)
tNode = newNode
Next
Me.TV.ExpandAll()
End Sub
Private Sub TV_ItemDrag(sender As Object, e As ItemDragEventArgs) Handles TV.ItemDrag
DoDragDrop(Me.TV.SelectedNode, DragDropEffects.Copy + DragDropEffects.Move + DragDropEffects.Scroll)
End Sub
Private Sub TV_DragEnter(sender As Object, e As DragEventArgs) Handles TV.DragEnter
e.Effect = DragDropEffects.Move
End Sub
Private Sub TV_DragOver(sender As Object, e As DragEventArgs) Handles TV.DragOver
e.Effect = DragDropEffects.Move
If (e.KeyState And 8) = 8 Then
e.Effect += DragDropEffects.Copy
End If
End Sub
Private Sub TV_DragDrop(sender As Object, e As DragEventArgs) Handles TV.DragDrop
Dim TemplateNode As TemplateNode = e.Data.GetData(GetType(TemplateNode))
Me.TV.Nodes.Add(TemplateNode.Clone())
End Sub
Private Sub bCopy_Click(sender As Object, e As EventArgs) Handles bCopy.Click
My.Computer.Clipboard.SetData("TemplateNode", Me.TV.SelectedNode)
End Sub
Private Sub bCut_Click(sender As Object, e As EventArgs) Handles bCut.Click
My.Computer.Clipboard.SetData("TemplateNode", Me.TV.SelectedNode)
Me.TV.SelectedNode.Remove()
End Sub
Private Sub bPaste_Click(sender As Object, e As EventArgs) Handles bPaste.Click
Dim TemplateNode As TemplateNode = My.Computer.Clipboard.GetData("TemplateNode")
If Me.TV.SelectedNode Is Nothing Then
Me.TV.Nodes.Add(TemplateNode)
Else
Me.TV.SelectedNode.Nodes.Add(TemplateNode)
End If
End Sub
End Class
<Serializable()> _
Public Class TemplateNode
Inherits TreeNode
Public MyString As String = "MyStringValue"
Public MyDateTime As DateTime = DateTime.Now
Public MyBytes() As Byte
Public Sub New()
Dim buff(255) As Byte
For i As Integer = 0 To buff.GetUpperBound(0)
buff(i) = CByte(Rnd() * 100)
Next
Me.MyBytes = buff
Me.Text = Guid.NewGuid().ToString()
End Sub
Protected Friend Sub New(info As SerializationInfo, context As StreamingContext)
MyBase.New(info, context)
End Sub
End Class
导入System.Runtime.Serialization
公开课表格1
私有子表单1_Load(发送方作为对象,e作为事件参数)处理Me.Load
Me.TV.Nodes.Clear()
将tNode设置为新的TemplateNode()
Me.TV.Nodes.Add(tNode)
对于i,作为整数=1到5
将newNode调整为新的TemplateNode()
tNode.Nodes.Add(newNode)
tNode=newNode
下一个
Me.TV.ExpandAll()
端接头
私有子TV_ItemDrag(发送方作为对象,e作为ItemDragEventArgs)处理TV.ItemDrag
DoDragDrop(Me.TV.SelectedNode,DragDropEffects.Copy+DragDropEffects.Move+DragDropEffects.Scroll)
端接头
专用子TV_DragEnter(发送方作为对象,e作为DragEventArgs)处理TV.DragEnter
e、 效果=DragDropEffects.Move
端接头
专用子TV_DragOver(发送方作为对象,e作为DragEventArgs)处理TV.DragOver
e、 效果=DragDropEffects.Move
如果(e.KeyState和8)=8,则
e、 效果+=DragDropEffects.Copy
如果结束
端接头
私有子TV_DragDrop(发送方作为对象,e作为DragEventArgs)处理TV.DragDrop
Dim TemplateNode As TemplateNode=e.Data.GetData(GetType(TemplateNode))
Me.TV.Nodes.Add(TemplateNode.Clone())
端接头
私有子b复制\u单击(发送者作为对象,e作为事件参数)处理b复制。单击
My.Computer.Clipboard.SetData(“TemplateNode”,Me.TV.SelectedNode)
端接头
Private Sub bCut\u Click(发件人作为对象,e作为事件参数)处理bCut。单击
My.Computer.Clipboard.SetData(“TemplateNode”,Me.TV.SelectedNode)
Me.TV.SelectedNode.Remove()
端接头
私有子bPaste\u单击(发件人作为对象,e作为事件参数)处理bPaste。单击
Dim TemplateNode As TemplateNode=My.Computer.Clipboard.GetData(“TemplateNode”)
如果Me.TV.SelectedNode为空,则
Me.TV.Nodes.Add(TemplateNode)
其他的
Me.TV.SelectedNode.Nodes.Add(TemplateNode)
如果结束
端接头
末级
_
公共类模板节点
继承TreeNode
Public MyString As String=“MyStringValue”
Public MyDateTime As DateTime=DateTime.Now
公共MyBytes()作为字节
公共分新()
Dim buff(255)作为字节
对于i As Integer=0到buff.GetUpperBound(0)
buff(i)=CByte(Rnd()*100)
下一个
Me.MyBytes=buff
Me.Text=Guid.NewGuid().ToString()
端接头
受保护的好友子新建(信息作为SerializationInfo,上下文作为StreamingContext)
MyBase.New(信息、上下文)
端接头
末级
旧东西,但我花了几个小时面对同样的问题,所以下面是有效的方法:
Imports System.Runtime.Serialization
Public Class Form1
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load
Me.TV.Nodes.Clear()
Dim tNode As New TemplateNode()
Me.TV.Nodes.Add(tNode)
For i As Integer = 1 To 5
Dim newNode As New TemplateNode()
tNode.Nodes.Add(newNode)
tNode = newNode
Next
Me.TV.ExpandAll()
End Sub
Private Sub TV_ItemDrag(sender As Object, e As ItemDragEventArgs) Handles TV.ItemDrag
DoDragDrop(Me.TV.SelectedNode, DragDropEffects.Copy + DragDropEffects.Move + DragDropEffects.Scroll)
End Sub
Private Sub TV_DragEnter(sender As Object, e As DragEventArgs) Handles TV.DragEnter
e.Effect = DragDropEffects.Move
End Sub
Private Sub TV_DragOver(sender As Object, e As DragEventArgs) Handles TV.DragOver
e.Effect = DragDropEffects.Move
If (e.KeyState And 8) = 8 Then
e.Effect += DragDropEffects.Copy
End If
End Sub
Private Sub TV_DragDrop(sender As Object, e As DragEventArgs) Handles TV.DragDrop
Dim TemplateNode As TemplateNode = e.Data.GetData(GetType(TemplateNode))
Me.TV.Nodes.Add(TemplateNode.Clone())
End Sub
Private Sub bCopy_Click(sender As Object, e As EventArgs) Handles bCopy.Click
My.Computer.Clipboard.SetData("TemplateNode", Me.TV.SelectedNode)
End Sub
Private Sub bCut_Click(sender As Object, e As EventArgs) Handles bCut.Click
My.Computer.Clipboard.SetData("TemplateNode", Me.TV.SelectedNode)
Me.TV.SelectedNode.Remove()
End Sub
Private Sub bPaste_Click(sender As Object, e As EventArgs) Handles bPaste.Click
Dim TemplateNode As TemplateNode = My.Computer.Clipboard.GetData("TemplateNode")
If Me.TV.SelectedNode Is Nothing Then
Me.TV.Nodes.Add(TemplateNode)
Else
Me.TV.SelectedNode.Nodes.Add(TemplateNode)
End If
End Sub
End Class
<Serializable()> _
Public Class TemplateNode
Inherits TreeNode
Public MyString As String = "MyStringValue"
Public MyDateTime As DateTime = DateTime.Now
Public MyBytes() As Byte
Public Sub New()
Dim buff(255) As Byte
For i As Integer = 0 To buff.GetUpperBound(0)
buff(i) = CByte(Rnd() * 100)
Next
Me.MyBytes = buff
Me.Text = Guid.NewGuid().ToString()
End Sub
Protected Friend Sub New(info As SerializationInfo, context As StreamingContext)
MyBase.New(info, context)
End Sub
End Class
导入System.Runtime.Serialization
公开课表格1
私有子表单1_Load(发送方作为对象,e作为事件参数)处理Me.Load
Me.TV.Nodes.Clear()
将tNode设置为新的TemplateNode()
Me.TV.Nodes.Add(tNode)
对于i,作为整数=1到5
将newNode调整为新的TemplateNode()
tNode.Nodes.Add(newNode)
tNode=newNode
下一个
Me.TV.ExpandAll()
端接头
私有子TV_ItemDrag(发送方作为对象,e作为ItemDragEventArgs)处理TV.ItemDrag
DoDragDrop(Me.TV.SelectedNode,DragDropEffects.Copy+DragDropEffects.Move+DragDropEffects.Scroll)
端接头
专用子TV_DragEnter(发送方作为对象,e作为DragEventArgs)处理TV.DragEnter
e、 效果=DragDropEffects.Move
端接头
专用子TV_DragOver(发送方作为对象,e作为DragEventArgs)处理TV.DragOver
e、 效果=DragDropEffects.Move
如果(e.KeyState和8)=8,则
e、 效果+=DragDropEffects.Copy
如果结束
端接头
私有子TV_DragDrop(发送方作为对象,e作为DragEventArgs)处理TV.DragDrop
Dim TemplateNode As TemplateNode=e.Data.GetData(GetType(TemplateNode))
Me.TV.Nodes.Add(TemplateNode.Clone())
端接头
私有子b复制\u单击(发送者作为对象,e作为事件参数)处理b复制。单击
My.Computer.Clipboard.SetData(“TemplateNode”,Me.TV.SelectedNode)
端接头
私有子bCut_单击(发件人作为对象,e作为事件参数)Han