Question

请问一下：c# winfrom treeview的刷新，总是闪烁，并且无法操作。这个问题你解决了吗

Answer 1

参考下这个

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace 树形节点控件练习
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            treeView1.Nodes.Clear();
            TreeNode tem = new TreeNode("根节点");
            treeView1.Nodes.Add(tem);
        }
        private void AddChildNode()
        {
            //首先判断是否选定组件中的位置
            if (treeView1.SelectedNode == null)
            {
                MessageBox.Show("请选择一个节点", "提示信息", MessageBoxButtons.OK,
                    MessageBoxIcon.Information);
            }
            else
            {
                if (textBox1.Text != "")
                {
                    //创建一个节点对象并初始化
                    TreeNode tmp;
                    tmp = new TreeNode(textBox1. Text);
                    //在TreeView组件中加入子节点
                    treeView1.SelectedNode.Nodes.Add(tmp);
                    treeView1.SelectedNode = tmp;
                    treeView1.ExpandAll();
                }
                else
                {
                    MessageBox.Show("TextBox组件必须填入节点名称！","提示信息",
                        MessageBoxButtons.OK,MessageBoxIcon.Information);
                    return;
                }
            }
        }
        private void AddParent()
        {
            try
            {
                //首先判断是否选定组件中的节点位置
                if (treeView1.SelectedNode == null)
                {
                    MessageBox.Show("请选择一个节点", "提示信息",
                        MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
                else
                {
                    if (textBox1.Text != "")
                    {
                        //创建一个节点对象并初始化
                        TreeNode tmp;
                        tmp = new TreeNode(textBox1.Text);
                        //在TreeView组件中加入兄弟节点
                        treeView1.SelectedNode.Parent.Nodes.Add(tmp);
                        treeView1.ExpandAll();
                    }
                    else
                    {
                        MessageBox.Show("TextBox组件必须填入节点名称！", "提示信息",
                            MessageBoxButtons.OK, MessageBoxIcon.Information);
                        return;
                    }
                }
            }
            catch
            {
                TreeNode tem = new TreeNode("根节点");
                treeView1.Nodes.Add(tem);
            }
        }

        private void treeView1_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
                //获取鼠标当前像素位置为快捷菜单弹出位置
                contextMenuStrip1.Show(this, new Point(e.X, e.Y));
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //展开下级节点
            treeView1.SelectedNode.Expand();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            //定位根节点
            treeView1.SelectedNode=treeView1.Nodes[0];
            //展开组件中的所有节点
            treeView1.SelectedNode.ExpandAll();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            //定位根节点
            treeView1.SelectedNode=treeView1.Nodes[0];
            //关闭组件中所有节点
            treeView1.SelectedNode.Collapse();
        }

        private void contextMenuStrip1_Opening(object sender, CancelEventArgs e)
        {

        }

        private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
        {

        }

        private void 加入子节点ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            AddChildNode();
        }

        private void 加入兄弟节点ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            AddParent();
        }

        private void ToolStripMenuItem3_Click(object sender, EventArgs e)
        {
            //判断选中的节点是否存在下级节点
            if (treeView1.SelectedNode.Nodes.Count == 0)
                //删除节点
                treeView1.SelectedNode.Remove();
            else
                MessageBox.Show("请先删除此节点中的子节点！","提示信息",
                    MessageBoxButtons.OK,MessageBoxIcon.Information);
        }
    }
}

Answer 2

重绘了控件吗?　还是在数据源上一直不断更新？