textbook1和textbox 2和textbox3的交互如何完成

Question

如何操作
如何找出textbook一中的数据所包含的字母和数字的个数，并将统计结果显示在textbook二和三中

Answer 1

using System;
using System.Windows.Forms;
using System.IO;
using System.Linq;
using System.Text;
namespace demo
{
    public partial class Form1 : Form
    {
        string dataPath = @"f:\data.txt";
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            textBox1.Text = File.ReadAllText(dataPath, Encoding.UTF8);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            var charcount = 0;
            var numbercount = 0;
            foreach (var c in textBox1.Text)
            {
                if (c >= '0' && c <= '9') numbercount++;
                if ((c >= 'A' && c <= 'Z' )|| (c >= 'a' && c <= 'z')) charcount++;
            }
            textBox2.Text = charcount.ToString();
            textBox3.Text = numbercount.ToString();

            File.AppendAllText(dataPath, $"\r\n字母个数：{charcount}\r\n数字个数：{numbercount}",Encoding.UTF8);
        }
    }

}