C# 数组作为DropDownList数据源实例---年月日加载

最新推荐文章于 2020-03-06 22:42:46 发布

原创最新推荐文章于 2020-03-06 22:42:46 发布 · 置顶 · 1.5k 阅读

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本文介绍了一个基于ASP.NET的日期选择器实现方法，通过页面加载事件动态更新下拉列表中的日期选项。针对不同的月份和年份，该方法能够正确处理平年与闰年的2月天数变化。

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        protected void Page_Load(object sender, EventArgs e)
        {
            
            bindday(yearDropDL.SelectedValue, monthDropDL.SelectedValue);
        }
        public void bindday(string y, string m)
        {
            int year = int.Parse(y);
            int month = int.Parse(m);
            int[] lp = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 };
            int[] nlp = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28 };
            int[] lm = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 };
            int[] bm = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 };
            if (month == 2)
            {
                if (year % 100 == 0)
                {
                    if (year % 400 == 0)
                    {
                        dayDropDL.DataSource = lp;
                        dayDropDL.DataBind();
                    }else
                   {
                    dayDropDL.DataSource = nlp;
                    dayDropDL.DataBind();
                   }
                }
                else if (year % 4 == 0)
                {
                    dayDropDL.DataSource = lp;
                    dayDropDL.DataBind();
                }
                else
                {
                    dayDropDL.DataSource = nlp;
                    dayDropDL.DataBind();
                }
            }
            else if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12)
            {
                dayDropDL.DataSource = bm;
                dayDropDL.DataBind();
            }
            else
            {
                dayDropDL.DataSource = lm;
                dayDropDL.DataBind();
            }