答案之书程序

需求：用户输入手机号码后4位或者生日，自动生成答案之书对应答案

效果图

C#代码实现过程

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 WindowsFormsApp1
{public partial class Form_AnswerBook : Form{public Form_AnswerBook(){InitializeComponent();}private void Form_AnswerBook_Load(object sender, EventArgs e){text_numberorbirthday.MaxLength = 4;if (string.IsNullOrEmpty(text_numberorbirthday.Text)) {text_answerbookpages.Text = "0";}}private void text_numberorbirthday_TextChanged(object sender, EventArgs e){if (text_numberorbirthday.Text.Length == 4 && int.TryParse(text_numberorbirthday.Text, out int inputValue)){Random rand = new Random();int randomNumber = rand.Next(1, 801);text_answerbookpages.Text = randomNumber.ToString();}else{text_answerbookpages.Text = "";}}}
}