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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