拖放后在Treeview中获取子项的名称

Posted 2021-04-20

我使用了搜索功能，但找不到答案。我正在做一个学校/实习项目。

我有一个拖放功能。 Strings从ListBox转到TreeView。 TreeView的结构未知。我只想知道孩子们。

我想要做：

1）将所有电机和传感器放入ListBox（来自电机和传感器列表）>这没问题

2）拖动f.e. TreeView的传感器。传感器从ListBox消失。 >这也没问题。

3）更新ListBox。在拖放期间，可能会创建新的传感器或电机。我想拥有ListBox中的所有传感器和演员，让那些已经在TreeView的人感到高兴。这是一个问题。我找不到TreeView的孩子。

我可以找到由treeview.Nodes.Add("P5")手动添加的孩子。但我找不到TreeView中的拖拉儿童。所以，我发现P5总线拖放后找不到FSA。

有谁知道拖放节点和手动节点之间的区别？我怎么能找到拖拉的孩子。

编辑：我想我只是在treeview的第一层搜索。而不是在那之后的层。还没有解决方案。

谢谢！

private void treeViewDrop_DragDrop(object sender, DragEventArgs e)
{
    TreeNode nodeToDropIn = treeViewDrop.GetNodeAt(treeViewDrop.PointToClient(new Point(e.X, e.Y)));
    if (nodeToDropIn == null) { return; }
    object data = e.Data.GetData(typeof(String));
    if (data == null) { return; }
    nodeToDropIn.Nodes.Add(data.ToString());

    // Data (string) to HLF of motor , textbox
    foreach (Sensor mySensor in sensorlist.Where(sensor => sensor.TAG == data.ToString()))
    {
        string treeviewpath = nodeToDropIn.FullPath.ToString();
        string treeviewpath1 = treeviewpath.Replace(@"", ".");
        mySensor.Higherlevelfunction = treeviewpath1 + "." + data.ToString();
    }

    // Data (string) to HLF of motor, textbox
    foreach (Motor mymotor in motorlist.Where(motor => motor.TAG == data.ToString()))
    {
        string treeviewpath = nodeToDropIn.FullPath.ToString();
        string treeviewpath1 = treeviewpath.Replace(@"", ".");
        mymotor.Higherlevelfunction = treeviewpath1 + "." + data.ToString();
    }

    // Refresh equipment
    LoadPropsFlowSensor();
    LoadPropsPressureSensor();
    LoadPropsLevelSensor();
    loadPropsMotor();


    listBoxDrag.Items.Remove(data);
    treeViewDrop.ExpandAll();
}

private void listBoxDrag_DragOver(object sender, DragEventArgs e)
{
    e.Effect = DragDropEffects.Move;
}

private void treeViewDrop_DragEnter(object sender, DragEventArgs e)
{
    e.Effect = DragDropEffects.Move;
}

private void listBoxDrag_MouseDown(object sender, MouseEventArgs e)
{
    listBoxDrag.DoDragDrop(this.listBoxDrag.SelectedItem, DragDropEffects.Move);
}

private void treeViewDrop_DoubleClick(object sender, EventArgs e)
{
    {
        // Pop up screen. Write here node name of group
        string nodename = "";
        nodename = Interaction.InputBox("Supply new node name", "New node", "", -1, -1);
        if (nodename == "") { return; }
        if (treeViewDrop.SelectedNode != null)
        {
            treeViewDrop.SelectedNode.Nodes.Add(nodename);
            treeViewDrop.ExpandAll();
        }
    }
}

private void button3_Click(object sender, EventArgs e)
{
    // Remove selected node 
    if (treeViewDrop.SelectedNode != null)
    {
        treeViewDrop.SelectedNode.Remove();
    }
}

private void button4_Click(object sender, EventArgs e)
{
    // Refresh listbox with all sensors and actors who are not in the treeview.
    Refreshlistbox();
}

List<String> stringlist1 = new List<String>();
List<String> stringlist2 = new List<String>();
private void Refreshlistbox()
{

    listBoxDrag.Items.Clear();
    stringlist1.Clear();

    foreach (Sensor mysensor in sensorlist)
    {
        stringlist1.Add(mysensor.TAG);
    }
    foreach (Motor mymotor in motorlist)
    {
        stringlist1.Add(mymotor.TAG);
    }

    stringlist2.Clear();

    foreach (TreeNode node in treeViewDrop.Nodes)
    {
        if (node.Text.Equals("FSA"))
        {
            MessageBox.Show("Yes, found FSA");
        }
    }
    treeViewDrop.Nodes.Add("P5");

    foreach (TreeNode node in treeViewDrop.Nodes)
    {
        if (node.Text.Equals("P5"))
        {
            MessageBox.Show("Yes,  found P5");
        }
    }

    MessageBox.Show("Done");

    var firstNotSecond = stringlist1.Except(stringlist2).ToList();
    foreach (String mystring in firstNotSecond)
    {
        listBoxDrag.Items.Add(mystring);
    }
}

答案

找到了解决方案

    private void PrintRecursive(TreeNode treeNode)
    {
        // Print the node.  
        System.Diagnostics.Debug.WriteLine(treeNode.Text);
        stringlist2.Add(treeNode.Text);
         // Print each node recursively.  
        foreach (TreeNode tn in treeNode.Nodes)
        {
            PrintRecursive(tn);
        }
    }

    // Call the procedure using the TreeView.  
    private void CallRecursive(TreeView treeView)
    {
        // Print each node recursively.  
        TreeNodeCollection nodes = treeView.Nodes;
        foreach (TreeNode n in nodes)
        {
            PrintRecursive(n);
        }
    }