如何在C# Windows Forms应用程序中动态创建按钮单击时更改动态创建的标签文本

using System;
using System.Windows.Forms;

namespace DynamicControlsExample
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        private void btnCreate_Click(object sender, EventArgs e)
        {
            // 创建新的按钮
            Button newButton = new Button();
            newButton.Location = new System.Drawing.Point(100, 100);
            newButton.Size = new System.Drawing.Size(75, 23);
            newButton.Text = "点击我";
            newButton.Click += new EventHandler(btnDynamic_Click); // 添加按钮的点击事件处理程序

            // 创建新的标签
            Label newLabel = new Label();
            newLabel.Location = new System.Drawing.Point(100, 150);
            newLabel.Size = new System.Drawing.Size(150, 20);
            newLabel.Text = "初始文本";

            // 将按钮和标签添加到窗体中
            this.Controls.Add(newButton);
            this.Controls.Add(newLabel);
        }

        private void btnDynamic_Click(object sender, EventArgs e)
        {
            Button clickedButton = sender as Button;

            // 查找与按钮关联的标签控件
            Label associatedLabel = null;
            foreach (Control control in this.Controls)
            {
                if (control is Label && control.Location.Y == clickedButton.Location.Y + 50)
                {
                    associatedLabel = (Label)control;
                    break;
                }
            }

            // 更改标签的文本
            if (associatedLabel != null)
            {
                associatedLabel.Text = "按钮被点击";
            }
        }
    }
}