C# 窗体传值，TreeView To TreeView

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 WindowsFormsApp3
{

    public partial class Form2 : Form
    {

        public Form2() : this(null)
        {

        }

        public string ParametersValue { get; set; }

        public event EventHandler DataTransmitEvent;

        public Form2(string value)
        {
            InitializeComponent();
            treeView1.NodeMouseDoubleClick += treeView1_NodeMouseDoubleClick;
            ParametersValue = value;
        }

        private void treeView1_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
        {
            if (treeView1.Nodes.Count > 0)
            {
                if (treeView1.SelectedNode.Text == "输入" || treeView1.SelectedNode.Text == "输出" || treeView1.SelectedNode.Text.Contains("工具："))
                {

                }
                else
                {
                    ParametersValue = treeView1.SelectedNode.Text;
                    if (DataTransmitEvent != null)
                    {
                        DataTransmitEvent(this, e);
                        this.Close();
                    }
                }
            }
        }
    }
}

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 WindowsFormsApp3
{


    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();

            treeView1.NodeMouseDoubleClick += treeView1_NodeMouseDoubleClick;
        }

        /// <summary>
        /// treeView双击绑定数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void treeView1_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
        {
            if (treeView1.Nodes.Count > 0)
            {
                Point point = treeView1.PointToClient(Control.MousePosition);

                if (point.X < 55 && point.X > 44)
                {
                    if (treeView1.SelectedNode.Text == "输入" || treeView1.SelectedNode.Text == "输出")
                    {

                    }
                    else
                    {
                        Form2 f2 = new Form2();
                        f2.DataTransmitEvent += new EventHandler(
                            (sender1, e1) =>
                            {
                                if(!treeView1.SelectedNode.Text.Contains(":"))
                                {
                                    treeView1.SelectedNode.Text = treeView1.SelectedNode.Text + ":" + f2.ParametersValue;
                                }
                            }
                        );
                        f2.ShowDialog(this);
                    }
                }
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Form3 form3 = new Form3();
            form3.Show();
        }
    }
}

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 WindowsFormsApp3
{
    public partial class Form3 : Form
    {
        public Form3()
        {
            InitializeComponent();
            treeView1.NodeMouseDoubleClick += treeView1_NodeMouseDoubleClick;
        }
        /// <summary>
        /// treeView双击绑定数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void treeView1_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
        {
            if (treeView1.Nodes.Count > 0)
            {
                Point point = treeView1.PointToClient(Control.MousePosition);

                if (point.X < 55 && point.X > 44)
                {
                    if (treeView1.SelectedNode.Text == "输入" || treeView1.SelectedNode.Text == "输出")
                    {

                    }
                    else
                    {
                        Form2 f2 = new Form2();
                        f2.DataTransmitEvent += new EventHandler(
                            (sender1, e1) =>
                            {
                                if (!treeView1.SelectedNode.Text.Contains(":"))
                                {
                                    treeView1.SelectedNode.Text = treeView1.SelectedNode.Text + ":" + f2.ParametersValue;
                                }
                            }
                        );
                        f2.ShowDialog(this);
                    }
                }
            }
        }
    }
}