C# 利用repeater 的嵌套实现一个自己想要的日历页面

repeater 控件是一个很灵活的东东，本人在程序开发中就最爱用到它了！！！
很多朋友应该在使用 VS2005 自带的日历控件的时候都发现或多或少的不能满足自己的特殊需求

这个实例看似很简单但如果能够家里改善将能很好的运用到自己的程序当中（至少比用JS写个控件简单方便，还能很好的很数据库关联开发），本代码只粘贴出了日历的实现，实际上我用到了四个repeater 的嵌套实现的是一个日程管理的系统，剩下的和数据库有关联，所以删掉了！希望对想使用日历控件的朋友有一定的帮助，注释写的很清楚了，朋友们可以随便改动 (程序有注释的，希望大家粘贴到VS 2005 中去看很直观很清楚的)

aspx 页面

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Test.Web._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head + n;
}

    </script>
</head>
<body>
    <form />
    </form>
</body>
</html>

.CS文件

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

namespace Test.Web
{
    public partial class _Default : System.Web.UI.Page
    {
        DateTime date = DateTime.Now;
        protected void Page_Load(object sender, EventArgs e)
        {
            if (Request.QueryString["date"] != null)
            {
                date = Convert.ToDateTime(Request.QueryString["date"]).AddMonths(Convert.ToInt32(Request.QueryString["goto"]));
            }

            hdDate.Value = date.ToString();
            if (!Page.IsPostBack)
            {
                lblDate.Text = date.ToString("yyyy年MM月");
                BindWeek();
            }
        }

        private void BindWeek()
        {
            DateTime obj = date.AddDays(1 - date.Day);//获取本月第一天

            int week = 1;
            for (int i = 1; i < 32; i++)
            {
                DateTime newDay = obj.AddDays(i);
                if (newDay.Month == obj.Month)//判断天数加一后的时间是否还在本月内
                {
                    if (newDay.DayOfWeek == 0) week++;//累加得到本月共有几周
                }
                else break;
            }

            DataSet ds = new DataSet();//创建一个dtatset 用来作为repeater 的数据源
            DataTable weekTable = new DataTable("weekTable");//创建一个dateTable 存放周表（即日历的行数）
            ds.Tables.Add(weekTable);
            weekTable.Columns.Add("id");
            weekTable.Columns.Add("Text");
            for (int i = 1; i <= week; i++)
            {
                DataRow datarow = weekTable.NewRow();
                datarow["id"] = i;
                datarow["text"] = "第" + i.ToString() + "周";
                ds.Tables["weekTable"].Rows.Add(datarow);
            }

            rptParent.DataSource = ds.Tables[0];//绑定第一个repeater 即日历的行数
            rptParent.DataBind();
        }

        protected void rptParent_ItemDataBound(object sender, RepeaterItemEventArgs e)
        {
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
            {
                Repeater rptChild = (Repeater)e.Item.FindControl("rptChild");
                rptChild.DataSource = GetWeekTable(Convert.ToInt32(DataBinder.Eval(e.Item.DataItem, "id")));
                rptChild.DataBind();
            }
        }

        protected void rptChild_ItemDataBound(object sender, RepeaterItemEventArgs e)
        {
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
            {
                //根据不同样式设置添加按钮图片路径
                HtmlImage img = (HtmlImage)e.Item.FindControl("imgAdd");
                if (DataBinder.Eval(e.Item.DataItem, "week") != System.DBNull.Value) {
                    DateTime newTime = Convert.ToDateTime((DataBinder.Eval(e.Item.DataItem, "date")));

                    if (newTime.Date == DateTime.Now.Date)
                    {
                        HtmlTable td = (HtmlTable)e.Item.FindControl("colorCell");
                        td.Attributes.Add("style", "background-color:#F9E97D;");
                    }
                }
            }
        }

        /// <summary>
        /// 获得本月某一周的具体日期（不足七天的比如第一周不是从周日开始的或者最后一周不是以周六结束的）都以空时间补充到周详细表中
        /// </summary>
        /// <param name="n">本月的第几周</param>
        /// <returns>返回本月某一周的具体日期的一个集合</returns>
        private DataTable GetWeekTable(int n)
        {
            DataSet ds = new DataSet();
            DataTable weekTable = new DataTable("weekTable");
            ds.Tables.Add(weekTable);
            weekTable.Columns.Add("week");
            weekTable.Columns.Add("date");
            weekTable.Columns[1].DataType = Type.GetType("System.DateTime");

            DateTime obj = new DateTime();
            if (n == 1)//如果是第一周
            {
                obj = date.AddDays(1 - date.Day);
                int week = (int)obj.DayOfWeek;
                if (week > 0)//如果不是周日将补上空白
                {
                    for (int i = week - 1; i >= 0; i--)
                    {
                        DataRow datarow = weekTable.NewRow();
                        ds.Tables["weekTable"].Rows.Add(datarow);
                    }
                    for (int i = week; i < 7; i++)
                    {
                        DataRow datarow = weekTable.NewRow();
                        datarow["week"] = i;
                        datarow["date"] = obj.AddDays(i - week);
                        ds.Tables["weekTable"].Rows.Add(datarow);
                    }
                }
                else
                {//如果是周日直接加上七天
                    for (int i = 0; i < 7; i++)
                    {
                        DataRow datarow = weekTable.NewRow();
                        datarow["week"] = i;
                        datarow["date"] = obj.AddDays(i);
                        ds.Tables["weekTable"].Rows.Add(datarow);
                    }
                }
            }
            else
            {//如果不是第一周直接从第一天加七天
                obj = date.AddDays(1 - date.Day);
                int week = (int)obj.DayOfWeek;
                if (week > 0) obj = obj.AddDays((n - 1) * 7 - week);
                else obj = obj.AddDays((n - 1) * 7);
                for (int i = 0; i < 7; i++)
                {
                    DateTime newObj = obj.AddDays(i);
                    if (newObj.Month != obj.Month) break;//如果已经到下个月了   停止填充进行（1）的判断后再填充空白所缺的天数
                    DataRow datarow = weekTable.NewRow();
                    datarow["week"] = i;
                    datarow["date"] = newObj;
                    ds.Tables["weekTable"].Rows.Add(datarow);
                }
                int count = ds.Tables["weekTable"].Rows.Count;//--------------(1)
                if (ds.Tables["weekTable"].Rows.Count < 7)
                {
                    for (int i = 0; i < 7 - count; i++)
                    {
                        DataRow datarow = weekTable.NewRow();
                        ds.Tables["weekTable"].Rows.Add(datarow);
                    }
                }
            }

            return ds.Tables[0];
        }
    }
}