基于Calendar实现blog日历的实例详解

本文实例讲述了asp.net基于Calendar实现bLOG日历功能。分享给大家供大家参考，具体如下：

怎样用.net的Calendar控件来实现blog中站点日历的效果呢,我们知道站点日历最重要的功能就是,显现在哪天blog主人写了日志,点击日期,你将进入所选日期的日志列表,

首先，我们知道.net中的服务器控件是会进行Postback的，Calendar控件中的第一天在点击时，就会进行一次postback我们要做的就是改变它默认的链接，使它不触发postback事件，其次，就是要知道哪一天有没有日志。至于有没有日志，就要去数据库查询了。

在Calendar中有一个DayRender事件，该事件在呈现每一天时触发，我们可以从这里入手,首先定义一个数组变量:

PRivate int[] arrcurrentDays, arrPredays, arrNextDays;
     //三个变量分别是当前月，前一月，和下一个月private int intCurrentMonth, intPreMonth, intNextMonth;
     //三个整型数组存放相对月份写有blog的日期

然后在Calendar的DayRender事件中写下如下代码:

CalendarDay d = ((DayRendereventargs)e).Day;
    TableCell c = ((DayRenderEventArgs)e).Cell;
// 初始化当前月有Blog的日期数组if (intPreMonth == 0){
      intPreMonth = d.Date.Month;
     // 注意：日历控件初始化时我们得到的第一个月并不是当前月，而是前一个月的月份  intCurrentMonth = intPreMonth + 1;
      if (intCurrentMonth >
     12)    intCurrentMonth = 1;
      intNextMonth = intCurrentMonth + 1;
      if (intNextMonth >
     12)    intNextMonth = 1;
      arrPreDays = getArrayDay(d.Date.Year, intPreMonth);
     //得到前一个月有blog的日期数组  arrCurrentDays = getArrayDay(d.Date.Year, intCurrentMonth);
    //得到当月有blog的日期数组  arrNextDays = getArrayDay(d.Date.Year, intNextMonth);
//得到下个月有blog的日期数组}
    int j = 0;
if (d.Date.Month.Equals(intPreMonth)){
  while (!arrPreDays[j].Equals(0))  {
    if (d.Date.Day.Equals(arrPreDays[j]))    {
          c.Controls.Clear();
          c.Controls.Add(new LITeralControl("a href="day.aspx?year=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" mce_href="day.aspx?year=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" " + d.Date.Year + "&
    month=" +      d.Date.Month + "&
    day=" + d.Date.Day + ">
    " + d.Date.Day + "/a>
    "));
    }
        j++;
  }
}
else if (d.Date.Month.Equals(intCurrentMonth)){
  while (!arrCurrentDays[j].Equals(0))  {
    if (d.Date.Day.Equals(arrCurrentDays[j]))    {
          c.Controls.Clear();
          c.Controls.Add(new LiteralControl("a href="day.aspx?year=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" mce_href="day.aspx?year=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" " + d.Date.Year + "&
    month=" +      d.Date.Month + "&
    day=" + d.Date.Day + " title=查看"+d.Date.Day+"日日志>
    " + d.Date.Day + "/a>
    "));
    }
        j++;
  }
}
else if (d.Date.Month.Equals(intNextMonth)){
  while (!arrNextDays[j].Equals(0))  {
    if (d.Date.Day.Equals(arrNextDays[j]))    {
          c.Controls.Clear();
          c.Controls.Add(new LiteralControl("a href="day.aspx?year=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" mce_href="day.aspx?year=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" " + d.Date.Year + "&
    month=" +      d.Date.Month + "&
    day=" + d.Date.Day + ">
    " + d.Date.Day + "/a>
    "));
    }
        j++;
  }
    

在这里我们注意的是getArrayDay()方法是从数据库里查询当月是否有日志的方法,它返回的是一个数组,我写的内容如下:

public int[] getArrayDay(int intYear, int intMonth){
      int[] intArray = new int[31];
      //从数据库里选取符合要求的记录，将日期存入数组  string strSQL = "select data From test where year(data)=" + intYear +  " and month(data)=" + intMonth;
      //调用DbHelPErOleDb自定义类中的ExecuteReader方法,它返回的是一个OleDbDataReader型  OleDbDataReader dr = dbAccess.DbHelperOleDb.ExecuteReader(strSql);
      int i = 0;
  while (dr.Read())  {
    if (i == 0)    {
          intArray[i] = Convert.ToDateTime(dr["data"].ToString()).Day;
          string a=Convert.ToString(intArray[i]);
          i++;
    }
    else if (Convert.ToDateTime(dr["data"].ToString()).Day != intArray[i - 1])    {
          intArray[i] = Convert.ToDateTime(dr["data"].ToString()).Day;
          i++;
    }
  }
      return intArray;
}
    

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