将Child和Grand Child添加到树视图的Parent节点 [英] Add Child and Grandchild to Parent node of a treeview

问题描述

大家好



我需要动态添加Child和Grand到父节点进行树视图，如下所示：



Treeview

- >父节点

- >子节点

- > GrandChild节点

- > GrandGrandChild Node

Hi All

I need to Add Child and Grandchild to the parentnode dynamically for a treeview as shown below:

Treeview
-->Parent Node
--> Child Node
--> GrandChild Node
--> GrandGrandChild Node

string NodeName = "Node - 1";  
            TreeNode tn = new TreeNode(NodeName ); 

            NodeName = NodeName + ".1"; 
            TreeNode tnChild  = new TreeNode(NodeName ); 

            NodeName = NodeName + ".1";
            TreeNode tnChild1 = new TreeNode(NodeName ); 
             
            NodeName = NodeName + ".1";
            TreeNode tnChild2 = new TreeNode(NodeName ); 

            tnChild1.ChildNodes.Add(tnChild2); 
            tnChild.ChildNodes.Add(tnChild1);
            tn.ChildNodes.Add(tnChild); 
            TreeView1.Nodes.Add(tn);

上面的代码表示如果深度= 4，如果depth = 3它应该停止到GrandChildNode ..为此我需要c＃中的动态代码

The above code means if the depth = 4 this should happen if the depth = 3 it should stop till GrandChildNode.. For this I need a dynamic code in c#

推荐答案

您好Mathi2code，



我会使用递归初始化函数。这样的事情:(你可以运行这个例子）

Hi Mathi2code,

I''d use a recursive initialization function. something like this: (you can run the example)

using System;
using System.Windows.Forms;

namespace RecursiveTreeViewNodes
{
    static class Program
    {
        [STAThread]
        static void Main()
        {
            // Create test Form
            Form form = new Form();
            // ... and add a TreeView to it
            TreeView treeview = new TreeView() { Dock = DockStyle.Fill };
            form.Controls.Add(treeview);
            
            // Create a root node
            TreeNode nodeRoot = new TreeNode("root");
            treeview.Nodes.Add(nodeRoot);

            // Add some child node trees to the root node with different nesting depths
            AddTreeNodesRecursive(nodeRoot, 4);
            AddTreeNodesRecursive(nodeRoot, 9);
            AddTreeNodesRecursive(nodeRoot, 3);

            // Show test Form
            Application.Run(form);
        }

        static void AddTreeNodesRecursive(TreeNode nodeParent, int iDepth)
        {
            if (iDepth > 0 && nodeParent != null) 
            {
                // Create one child node for the given parent node
                TreeNode nodeChild = new TreeNode(nodeParent.Text + ".1");
                nodeParent.Nodes.Add(nodeChild);

                // Call this function again, but now the child node is the new parent and the depth is decremented.
                AddTreeNodesRecursive(nodeChild, --iDepth); // recursion !
            }
        }
    }
}

这应该只给你一般理念。如果你期望非常深的嵌套深度，你应该避免递归，如果你害怕StackOverflows，它可以重新形成一个循环。



祝你的项目好运！ />


亲切问候约翰内斯

This should give you just the General idea. If if you expect very deep nesting depths you should avoid recursion, it could be reforumlated to a loop if you are fearing StackOverflows.

Good luck with your project!

kind regards Johannes

嗨
只需将添加语句粘贴到函数中即可。

ie，



private void add_child_node（string NodeName）

{

TreeNode tn = new TreeNode（ NodeName +。1）;

tn.ChildNodes.Add（tnChild）;

TreeView1.Nodes.Add（tn）;

}



每当用户需要添加节点（按钮）时调用此函数

Hi Just paste " the add statements " into a function.
ie,

private void add_child_node(string NodeName)
{
TreeNode tn = new TreeNode(NodeName+ ".1" );
tn.ChildNodes.Add(tnChild);
TreeView1.Nodes.Add(tn);
}

Call this function whenever the user needs to add the node(Push Button)

private void add_child_node（TreeNode NodeName，int noofnodes）

{

string temp = NodeName.Text;

for（int i = 0; i< noofnodes; i ++）>

{

temp + =。1;

TreeNode tn = new TreeNode（temp）;

NodeName.ChildNodes.Add（tn）;

}

}



其中noofnodes是no。您（或用户）需要添加到父级的节点

private void add_child_node(TreeNode NodeName,int noofnodes)
{
string temp=NodeName.Text;
for(int i=0;i<noofnodes;i++)>
{
temp += ".1";
TreeNode tn = new TreeNode(temp );
NodeName.ChildNodes.Add(tn);
}
}

where noofnodes is the no. of nodes you(or user) needs to add to the parent

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