日历

using System; using System.Text; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; using System.Collections;  namespace 日历 {     public partial class _Default : System.Web.UI.Page     {         protected void Page_Load(object sender, EventArgs e)         {             if (!IsPostBack) //该值指示该页是否正为响应客户端回发而加载，或者它是否正被首次加载和访问，如果是为响应客户端回发而加载该页，则为true；否则为 false。             {                  ArrayList arrList1 = new ArrayList();                                       for (int i = 2000; i <= 2012; i++)                 {                     arrList1.Add(i);                                                  }                year.DataSource = arrList1;                                           year.DataBind();                                     ArrayList arrList2 = new ArrayList();                                        for (int i = 1; i <= 12; i++)                 {                     arrList2.Add(i);                                                  }                 month.DataSource = arrList2;                                             month.DataBind();                                   ArrayList arrList3 = new ArrayList();                                        for (int i = 1; i <= 31; i++)                 {                     arrList3.Add(i);                                                  }                                                     day.DataSource = arrList3;                                               day.DataBind();                                                      }         }          protected void day_SelectedIndexChanged(object sender, EventArgs e)         {             int[] a = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };   //将数组作为控件数据源             int[] b = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };             int s1 = Int32.Parse(year.Text);             int s2 = Int32.Parse(month.Text);             int s3 = Int32.Parse(day.Text);                                     if ((s1%4 == 0 && s1%100 != 0) || (s1%400 == 0)) //判断闰年             {                                  ArrayList arrList3 = new ArrayList();                                       for (int i = 1; i <= b[s2-1]; i++)          //是闰年  则用b数组中的天数                 {                     arrList3.Add(i);                                                                      }                 day.DataSource = arrList3;                                           day.DataBind();               }             else             {                  ArrayList arrList3 = new ArrayList();                 for (int i = 1; i <= a[s2 - 1]; i++)      //不是闰年  则用a数组中的天数                 {                     arrList3.Add(i);                                                  }                 day.DataSource = arrList3;                                           day.DataBind();              }                                       xinqi.Text = caculateweekday(s1, s2, s3);          }           String caculateweekday(int y, int m, int d)      //计算星期几           {             if (m == 1) { m = 13; y--; }             if (m == 2) { m = 14; y--; }             int week = (d + 2 * m + 3 * (m + 1) / 5 + y + y / 4 - y / 100 + y / 400) % 7 + 1;//基姆拉尔森计算公式             string weekstr = "";             switch (week)             {                 case 1: weekstr = "星期一"; break;                 case 2: weekstr = "星期二"; break;                 case 3: weekstr = "星期三"; break;                 case 4: weekstr = "星期四"; break;                 case 5: weekstr = "星期五"; break;                 case 6: weekstr = "星期六"; break;                 case 7: weekstr = "星期日"; break;             }             return weekstr;         }          protected void zz(object sender, EventArgs e)         //改变天数时  改变星期数  我觉得这里可以优化         {             int s1 = Int32.Parse(year.Text);             int s2 = Int32.Parse(month.Text);             int s3 = Int32.Parse(day.Text);             xinqi.Text = caculateweekday(s1, s2, s3);         }                           }      }