TreeView节点检测

问题描述

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大家好

可以说我有一个树视图，其中的父节点具有子节点，而子节点具有孙节点.

我要说的问题是，我选择了一个大子节点. . . .如何检测选定子代的子代节点值是什么，子代和父代值是什么?

Hi Guys

Lets say I have a treeview with parent nodes that have child nodes that have grandchild nodes.

The Question I have is lets say I select a grand child node. . . .How will I detect what that grand child nodes value is and the child and parent value is of the selected grandchild?


Thanks?

推荐答案

TreeNode parent = myNode.Parent;
TreeNode grandParent = parent == null ? null : parent.Parent;

您在谈论什么样的价值?


让我们说我有一个名为school的节点，然后该节点有教室的子节点，而教室有书桌的子节点.
换句话说:学校:教室1:桌子1
:桌子2
:教室2:桌子1
:桌子2
:教室3:桌子1
:桌子2
所以可以说我选择教室3的桌子2
我想要桌子2教室3和学校的节点值
"谢谢"


我遇到的问题是TreeNode没有值-它具有文本字段，这将为您提供来自School:class room 1:desk 2和School:class room 2:desk 2的"desk 2".但是，您想要的听起来像是拥有一个Desk对象，该对象与每个Desk节点相关联，并且您希望通过树进行检索.如果是这样，那很容易:每个TreeNode都有一个Tag属性，其中包含一个对象.如果将Desk实例分配给适当的TreeNode，则可以检索它:

What kind of value are you talking about?


"Lets say i have a node named school and then that node has child nodes of class rooms and the classrooms has child nodes of desks.
In other words : School : class room 1 : desk 1
: desk 2
: class room 2 : desk 1
: desk 2
: class room 3 : desk 1
: desk 2
so lets say i select desk 2 of class room 3
I want to have the node values of desk 2 class room 3 and school
''Thanks"


The problem I have is that a TreeNode doesn''t have a Value - it has a Text field, which would give you "desk 2" from both School:class room 1:desk 2 and School:class room 2:desk 2. But what you want sound like you have a Desk object which is associated with each of the desk nodes and which you want to retrieve via the tree. If so, then that is easy: each TreeNode has a Tag property which contains an object. If you assign your Desk instance to the appropriate TreeNode, you can retrieve it:

Desk desk = myNode.Tag as Desk;
if (desk != null)
   {
   ...
   }

private string SelectNode()
{
    return SelectNode(tvFileMaps.Nodes);
}
private string SelectNode(TreeNodeCollection tColl)
{
    foreach (TreeNode tn in tColl)
    {
        if (tn.IsSelected)
        {
            return tn.Text;
        }
        else
        {
            return SelectNode(tn.Nodes);
        }
    }
    return string.Empty;
}

这将返回您选择的节点值，如果您想返回父节点值，请在其中进行一些更改

This will return you the selected node value, if you want to return the parent node value then do some change in that

这篇关于TreeView节点检测的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

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