Asp.net 如何删除日历的最后一周

我不知道为什么其他人以前没有问过这个问题。但是你有没有注意到asp:Calendar在末尾显示了额外的一周

例如，如果VisibleMonth设置为2010-03-01，FirstDayOfWeek设置为Sunday： 它将显示6周

2月28日至3月6日

三月七日至十三日

三月十四日至二十日

三月二十一日至二十七日

三月二十八日至四月三日

四月四日至四月十日

我想知道为什么微软显示的最后一行完全是在四月。我试图在网上搜索一处房产，但它似乎不存在

我能想到的唯一解决方案是覆盖Pre_渲染，并检查所有单个日期是否仍在VisibleDate的一周内。但当然，这是一个极端的检查，因为控件的每次呈现都会显示它

这是我的工作

protected void Calendar1_DayRender(object sender, DayRenderEventArgs e)
{
    int dayOfWeek = Convert.ToInt16(e.Day.Date.DayOfWeek);
    int compensate = dayOfWeek - Convert.ToInt16(DayOfWeek.Sunday);
    DateTime WeekStart = e.Day.Date.AddDays(-1 * compensate);
    DateTime WeekEnd = WeekStart.AddDays(6);

    // If the start and end of the week does not have relevance to the current month
    if (WeekStart.Month != Calendar1.VisibleDate.Month &&
        WeekEnd .Month != Calendar1.VisibleDate.Month)
    {
        e.Cell.Text = "";
        e.Cell.Height = 0;
        e.Cell.Visible = false;
    }
}

---

非常好。适用于大多数浏览器，但与Chrome 11.0.696.71和Safari for windows兼容（未在mac上测试）

对于某些月份，日历控件在月初显示额外的一周。（当一个月的第一天是一周的第一天时。）

当设置e.cell.Visible=false时，它不会渲染元素。因此，在chrome中，您将得到一行

。Chrome将此渲染为空白行。由于我认为没有办法通过calendar控件来设置TR元素的高度/样式，因此最终会出现一个外观难看的日历，它在某些月份缺少第一行

此外，当设置Visible=false时，将高度设置为0不会产生任何作用。如果不将Visible设置为false，只将height设置为0，则仍然无法在chrome中正确渲染。因此，解决方案是将高度设置为1

这是我修改过的解决方案

onrowrender

protected void Calendar1_DayRender(object sender, DayRenderEventArgs e){
    hideExtraWeek(sender, e, (DayOfWeek)Calendar1.FirstDayOfWeek);
}

功能

    protected void hideExtraWeek(object sender, DayRenderEventArgs e, DayOfWeek dw){
        if (dw == (DayOfWeek)7) dw = (DayOfWeek)0; // FirstDayOfweek returns 7 when set to default, But it's zero based so valid values are 0 to 6
        Boolean blnBrowserDoesntSupportsEmptyRow= Request.Browser.Browser=="Chrome" ||
                                            Request.Browser.Browser=="Safari";

        int dayOfWeek = Convert.ToInt16(e.Day.Date.DayOfWeek);
        int compensate = dayOfWeek - Convert.ToInt16(dw);
        DateTime WeekStart = e.Day.Date.AddDays(-1 * compensate);
        DateTime WeekEnd = WeekStart.AddDays(6);

        // If the start and end of the week does not have relevance to the current month
        if (WeekStart.Month==WeekEnd.Month && e.Day.IsOtherMonth){
            e.Cell.Text = "";
            e.Cell.Height = 1; // fix for chrome. Visible=false leaves a blank row even when there are no <td>s in the <tr>
            e.Cell.Visible = blnBrowserDoesntSupportsEmptyRow;
        }
    }

受保护的void hideExtrawWeek（对象发送方、DayRenderReventArgs e、DayOfWeek dw）{
如果（dw==（DayOfWeek）7）dw=（DayOfWeek）0；//FirstDayOfweek设置为默认值时返回7，但它是基于零的，因此有效值为0到6
布尔blnBrowserDoesntSupportsEmptyRow=Request.Browser.Browser==“Chrome”||
Request.Browser.Browser==“Safari”；
int dayOfWeek=转换为NT16（即Day.Date.dayOfWeek）；
int compensate=星期几-转换为16（dw）；
DateTime WeekStart=e.Day.Date.AddDays（-1*天）；
DateTime WeekEnd=WeekStart.AddDays（6）；
//如果一周的开始和结束与当前月份不相关
if（周开始月==周末月和e日等温线月）{
e、 Cell.Text=“”；
e、 Cell.Height=1；//fix for chrome.Visible=false将保留一个空行，即使在
e、 单元格可见=blnBrowserDoesntSupportsEmptyRow；
}
}

好的，我有另一个解决方案。经过一些调整。希望能有帮助。它的功能稍微多一些，但如果你的日历点击次数太多，它可能只节省1%的cpu：）确保将

日历1\u VisibleMonthChanged

事件附加到OnVisibleMonthChanged

private DateTime fromDate;
private DateTime toDate;
private Boolean blnBrowserDoesntSupportsEmptyRow = Request.Browser.Browser=="Chrome" ||
                                                       Request.Browser.Browser=="Safari";

    protected void Page_Load(object sender, EventArgs e){
        if (!Page.IsPostBack){
            setFromToDates(new DateTime(DateTime.Today.Year, DateTime.Today.Month, 1));
        }
    }

    protected void Calendar1_VisibleMonthChanged(object sender, MonthChangedEventArgs e){
        setFromToDates(e.NewDate);
    }

    protected void setFromToDates(DateTime monthStart){

        DayOfWeek dw = (DayOfWeek)Calendar1.FirstDayOfWeek;
        if (dw == (DayOfWeek)7) dw = (DayOfWeek)0;


        if (monthStart.DayOfWeek == dw){
            this.fromDate = monthStart;// if 1st day of calendar is also 1st of the month. just set as is
        }else{
            int dayOfWeek = Convert.ToInt16(monthStart.DayOfWeek);
            dayOfWeek = dayOfWeek == 0 ? 7 : dayOfWeek;
            int compensate = dayOfWeek - Convert.ToInt16(dw);
            this.fromDate = monthStart.AddDays(-1 * compensate);// set FromDate to the beggning day of the calendar. I.e may start from e.g. 25th of the previous month
        }

        this.toDate = monthStart.AddMonths(1);
        if (this.toDate.DayOfWeek != dw)
        {
            int dayOfWeek = Convert.ToInt16(this.toDate.DayOfWeek);
            dayOfWeek = dayOfWeek == 0 ? 7 : dayOfWeek;
            int compensate = dayOfWeek - Convert.ToInt16(dw);
            this.toDate=this.toDate.AddDays(7-compensate);
        }
    }








    protected void Calendar1_DayRender(object sender, DayRenderEventArgs e){
        // hide extra week
        hideExtraWeek(sender, e);
    }

    // returns weather or not the given day is hidden
    protected Boolean hideExtraWeek(object sender, DayRenderEventArgs e){
            Boolean isVisibleDay = e.Day.Date >= this.fromDate && e.Day.Date < this.toDate;

            // If the start and end of the week does not have relevance to the current month
            if (!isVisibleDay){
                e.Cell.Text = "";
                e.Cell.Height = 1; // fix for chrome. Visible=false leaves a blank row even when there are no <td>s in the <tr>
                e.Cell.Visible = blnBrowserDoesntSupportsEmptyRow;
             }
        return !isVisibleDay;
    }

private DateTime fromDate；
私有日期时间；
私有布尔blnBrowserDoesntSupportsEmptyRow=Request.Browser.Browser==“Chrome”||
Request.Browser.Browser==“Safari”；
受保护的无效页面加载（对象发送方、事件参数e）{
如果（！Page.IsPostBack）{
setFromToDates（新日期时间（DateTime.Today.Year，DateTime.Today.Month，1））；
}
}
受保护的无效日历1\u VisibleMonthChanged（对象发送者，MonthChangedEventArgs e）{
setFromToDates（如NewDate）；
}
受保护的无效集合FromToDates（DateTime monthStart）{
DayOfWeek dw=（DayOfWeek）日历1.FirstDayOfWeek；
如果（dw==（DayOfWeek）7）dw=（DayOfWeek）0；
如果（monthStart.DayOfWeek==dw）{
this.fromDate=monthStart；//如果日历的第一天也是一个月的第一天，只需按原样设置即可
}否则{
int dayOfWeek=转换为NT16（monthStart.dayOfWeek）；
dayOfWeek=dayOfWeek==0？7:dayOfWeek；
int compensate=星期几-转换为16（dw）；
this.fromDate=monthStart.AddDays（-1*补偿）；//将fromDate设置为日历的乞讨日。例如，可以从上个月的25日开始
}
this.toDate=monthStart.AddMonths（1）；
if（this.toDate.DayOfWeek！=dw）
{
int dayOfWeek=Convert.ToInt16（this.toDate.dayOfWeek）；
dayOfWeek=dayOfWeek==0？7:dayOfWeek；
int compensate=星期几-转换为16（dw）；
this.toDate=this.toDate.AddDays（7-7天）；
}
}
受保护的无效日历1\u DayRender（对象发送方，DayRenderReventArgs e）{
//多藏一周
hideExtraWeek（发送方，e）；
}
//返回给定日期是否隐藏的天气
受保护的布尔HideExtrawEk（对象发送方，DayRenderEventArgs e）{
布尔值isVisibleDay=e.Day.Date>=this.fromDate&&e.Day.Date

bool weekstart=false；
int[]longmounts=newint[]{1,3,5,7,8,10,12}；//一个月31天
int[]shortmonths=newint[]{4,6,9,11}；//一个月30天
受保护的无效日历1\u DayRender（对象发送方，DayRenderReventArgs e）
{
if（如：日等温线）
{
e、 Cell.Text=String.Empty；
e、 单元高度=0；
如果（e.Day.Date.DayOfWeek==DayOfWeek.Monday）//星期一是星期一的第一天
{
如果（上海）
<asp:Calendar ID="Calendar1" runat="server" CellPadding="1" CellSpacing="0"
 Width="600px" FirstDayOfWeek="Monday" BorderColor="#a1a1a1"
BorderWidth="1" BorderStyle="None" ShowGridLines="True" ShowDescriptionAsToolTip="True"
NextPrevStyle-CssClass=""
Height="500px" OnDayRender="Calendar1_DayRender" 
SelectionMode="None"  NextMonthText="&amp;gt;&amp;gt;" PrevMonthText="&amp;lt;&amp;lt;">
<OtherMonthDayStyle BorderStyle="None" />
</asp:Calendar>

bool weekstart = false;
int[] longmonths = new int[] { 1, 3, 5, 7, 8, 10, 12 };// 31 days in a Month
int[] shortmonths = new int[] { 4, 6, 9, 11 };// 30 days in a Month

protected void Calendar1_DayRender(object sender, DayRenderEventArgs e)
{

   if (e.Day.IsOtherMonth)
   {
        e.Cell.Text = String.Empty;
        e.Cell.Height = 0;
        if (e.Day.Date.DayOfWeek == DayOfWeek.Monday )//Monday is FirstDayOfWeek
        {
          if (shortmonths.Contains(e.Day.Date.Month) && e.Day.Date.Day == 24)
          {
             weekstart = true;
          }
          else if (longmonths.Contains(e.Day.Date.Month) && e.Day.Date.Day == 25)
          {
             weekstart = true;
          }
        }
        if (weekstart)
        {
           e.Cell.Visible = false;
        }
   }
   else if (!e.Day.IsOtherMonth)
   {
      weekstart = false;
   }

}

Private _hideEmptyWeek As Boolean

Protected Sub Calendar1_DayRender(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DayRenderEventArgs) Handles Calendar1.DayRender

    If e.Day.IsOtherMonth Then

        '' Hide first week if empty
        If e.Day.Date = e.Day.Date.AddDays(-e.Day.Date.Day + 1).AddMonths(1).AddDays(-7) Then ' If this date is a full week before next month
            _hideEmptyWeek = True
        End If


        '' Hide last week if empty
        If e.Day.Date.DayOfWeek = DayOfWeek.Sunday And e.Day.Date.Day < 7 Then ' If this is the first Sunday of next month
            _hideEmptyWeek = True
        End If


        '' Hide cell if we are in an empty week
        If _hideEmptyWeek = True Then
            e.Cell.Visible = False
        End If
    Else
        _hideEmptyWeek = False
    End If
End Sub

 Sub cal_DayRender(ByVal sender As Object, ByVal e As DayRenderEventArgs)
      If HideExtraWeek(e, If(Cal.FirstDayOfWeek = WebControls.FirstDayOfWeek.Default, Threading.Thread.CurrentThread.CurrentUICulture.DateTimeFormat.FirstDayOfWeek, Cal.FirstDayOfWeek)) Then
          e.Cell.Style("display") = "none"
          e.Cell.CssClass = "hiddenWeek"
          Exit Sub
      End If
      'do other render stuff here
 End Sub

Private Function HideExtraWeek(ByVal e As DayRenderEventArgs, ByVal startOfWeekDay As Integer) As Boolean
    If e.Day.IsOtherMonth Then
        'hide empty weeks, logic credited to Robert
        Dim currDay As Integer = e.Day.Date.DayOfWeek
        Dim weekStart As DateTime = e.Day.Date.AddDays(startOfWeekDay - currDay) 'first day of the week
        Dim weekEnd As DateTime = weekStart.AddDays(6)

        Return (weekStart.Month = weekEnd.Month) 'the entire week is part of the other month
    End If
    Return False
End Function

<script type="text/javascript">
        $(document).ready(function() {
             $("td.hiddenWeek").parent().hide();
        }
</script>