提问：c#实习内容，利用窗体计算闰年

Question

c#利用窗体计算某一阶段内所有闰年

Answer 1

用Int.Parse将输入框转数字，然后for遍历，写个函数判断是否闰年，是加入到listview中

题主要的代码如下，有帮助麻烦点个采纳【本回答右上角】，谢谢~~有其他问题可以继续交流~

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using System;
using System.Windows.Forms;
using Fleck;
using System.Security.Cryptography.X509Certificates;
using System.Collections.Generic;

namespace WindowsFormsApp
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        bool isRN(int year)
        {
            return (year % 400 == 0) || (year % 4 == 0 && year % 100 != 0);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            textBox1.Text = textBox2.Text = "";
            listView1.Items.Clear();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            bool err = false;
            int startYear, endYear;
            if (!int.TryParse(textBox1.Text, out startYear))
            {
                textBox1.Select();
                errorProvider1.SetError(textBox1, "起始年度为数字！");
                err = true;
            }
            else if (startYear < 0)
            {
                textBox1.Select();
                errorProvider1.SetError(textBox1, "起始年度需要大于0！");
                err = true;
            }
            if (!int.TryParse(textBox2.Text, out endYear))
            {
                textBox2.Select();
                errorProvider1.SetError(textBox2, "终止年度为数字！");
                err = true;
            }
            else if (endYear < 0)
            {
                textBox2.Select();
                errorProvider1.SetError(textBox2, "终止年度需要大于0！");
                err = true;
            }
            if (startYear > endYear) {
                textBox2.Select();
                errorProvider1.SetError(textBox2, "终止年度需要大于起始年度！");
                err = true;
            }
            if(err)return;
            errorProvider1.Clear();
            for (var i = startYear; i <= endYear; i++)
            {
                if (isRN(i)) listView1.Items.Add(i.ToString());
            }
        }
    }
}