C# 在WPF日历上标记特定日期

我正试图从WPF日历控件的数据库源中标记特定日期

下面是代码片段

XAML

此代码在初始运行时工作

但是，如果在运行时事件上再次运行它，比如说，如果我在数据库中添加了新日期，然后再次运行代码，它将在“TriggerCollection”使用（密封）后抛出

，它将无法修改。

错误

据我所知，将样式分配给日历后，

TriggerCollection

将被密封

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是否有更好的方法在WPF日历上动态标记日期？

每次都创建一个新的

样式。您可以使用
BasedOn
属性将其建立在XAML中定义的基础上：

var dateList = GetDatesFromDB();
Style dayButtonStyle = new Style() { BasedOn = (Style)this.Resources["calendarDayButtonStyle"] };
foreach (DateObject date in dateList)
{
    var dataTrigger = new DataTrigger() { Binding = new Binding("Date"), Value = new DateTime(date.Year, date.Month, date.Day) };
    dataTrigger.Setters.Add(new Setter(FontWeightProperty, FontWeights.Bold));
    dayButtonStyle.Triggers.Add(dataTrigger);
}
dayButtonStyle.Seal();
calendarDayButtonStyle.CalendarDayButtonStyle = dayButtonStyle;

非常感谢。但不幸的是，它产生了这个错误
“只能基于目标类型为基类型“IFrameworkInputElement”的样式”
。但是，你的回答给了我一个想法。我只是在.cs上编码样式。现在，标记特定日期的触发器可以动态工作。：）calendarDayButtonStyle必须与dayButtonStyle具有相同的
TargetType
。
var dateList = GetDatesFromDB();
Style dayButtonStyle = (Style)this.Resources["calendarDayButtonStyle"];
foreach (DateObject date in dateList)
{
  var DataTrigger dataTrigger = new DataTrigger() { Binding = new Binding("Date"), Value = new DateTime(date.Year, date.Month, date.Day) }; // 
  dataTrigger.Setters.Add(new Setter(FontWeightProperty, FontWeights.Bold));
  dayButtonStyle.Triggers.Add(dataTrigger);  // This will throw TriggerCollection -exception.
}
calendarDayButtonStyle.CalendarDayButtonStyle = dayButtonStyle;  // this will sealed TriggerCollection.

var dateList = GetDatesFromDB();
Style dayButtonStyle = new Style() { BasedOn = (Style)this.Resources["calendarDayButtonStyle"] };
foreach (DateObject date in dateList)
{
    var dataTrigger = new DataTrigger() { Binding = new Binding("Date"), Value = new DateTime(date.Year, date.Month, date.Day) };
    dataTrigger.Setters.Add(new Setter(FontWeightProperty, FontWeights.Bold));
    dayButtonStyle.Triggers.Add(dataTrigger);
}
dayButtonStyle.Seal();
calendarDayButtonStyle.CalendarDayButtonStyle = dayButtonStyle;