.net Calendar控件属性问题！

[flybisu]

前台页面就只有一个 <asp:Calendar ID="Calendar1" runat="server" >
</asp:Calendar>
然后在pageload的时候
if (!IsPostBack)
{
DateTime dt1 = new DateTime(2011, 1, 4);
DateTime dt2 = new DateTime(2011, 1, 31);
DateTime temp = dt1;
List<DateTime> listdate = new List<DateTime>();
listdate.Add(dt1);
for (; temp < dt2; temp.AddDays(1))
{
temp = temp.AddDays(1);
listdate.Add(temp);
}

this.Calendar1.SelectedDates.SelectRange(dt1, dt2);
for (int i = 0; i < listdate.Count; i++)
{
if (listdate[i] == Convert.ToDateTime("2011-1-8 00:00:00"))
{
this.Calendar1.SelectedDayStyle.BackColor = Color.Gray;
}
else
{
this.Calendar1.SelectedDayStyle.BackColor = Color.Red;
}

}
}


能够执行到 if (listdate[i] == Convert.ToDateTime("2011-1-8 00:00:00"))
{
this.Calendar1.SelectedDayStyle.BackColor = Color.Gray;
}
但是颜色没有变成灰色

最后显示结果全部是红色的 求解。。。。

[wangchangming]

为什么全部变红，你自己看
this.Calendar1.SelectedDates.SelectRange(dt1, dt2);
this.Calendar1.SelectedDayStyle.BackColor即给选定日期的样式属性赋值，
this.Calendar1.SelectedDayStyle.BackColor = Color.Gray;
而你最后一次给颜色赋值赋的是Color.Red，即this.Calendar1.SelectedDayStyle.BackColor = Color.Red;
所以会全部是红色，所以从４号到３１号全部是红色，
如果if (listdate[i] == Convert.ToDateTime("2011-1-31 00:00:00"))
就全部为灰色了

[wangchangming]

protected void Calendar1_DayRender(object sender, DayRenderEventArgs e)
{
if (e.Day.Date == Convert.ToDateTime("2010-12-18 00:00:00"))
e.Cell.BackColor = Color.Gray;
}

[rwm5366745]

for (int i = 0; i < listdate.Count; i++)
{
if (listdate[i] == Convert.ToDateTime("2011-1-8 00:00:00))"//能相等吗? {
this.Calendar1.SelectedDayStyle.BackColor = Color.Gray;
}
else
{
this.Calendar1.SelectedDayStyle.BackColor = Color.Red;
}

}

[wangchangming]

怎么不能相等

[zhang456]

3 楼 回答的很清楚了.
this.Calendar1.SelectedDates.SelectRange(dt1, dt2);
this.Calendar1.SelectedDayStyle.BackColor即给选定日期的样式属性赋值，
this.Calendar1.SelectedDayStyle.BackColor = Color.Gray;
而你最后一次给颜色赋值赋的是Color.Red，即this.Calendar1.SelectedDayStyle.BackColor = Color.Red;
所以会全部是红色，所以从４号到３１号全部是红色，
如果if (listdate[i] == Convert.ToDateTime("2011-1-31 00:00:00"))
就全部为灰色了