一、得到当前显示的月份：
DateTime SelectedDay = this.MC.DisplayDate;
二、得到当前选中的天，得到当前选中的周，得到当前显示的月份：
如果你使用系统默认的事件SelectedDateChanged是很难获取焦点的，给Calendar注册MC_MouseLeftButtonUp事件
1 //在初始化时注册事件 2 MC.AddHandler(Button.MouseLeftButtonDownEvent, new RoutedEventHandler(MC_MouseLeftButtonUp), true); 3 4 private void MC_MouseLeftButtonUp(object sender, RoutedEventArgs e)
事件的关键代码：
1 if (sender is Calendar)
2 {
3 if (MC.InputHitTest(Mouse.GetPosition(e.Source as FrameworkElement)) is TextBlock)
4 {
5 TextBlock tb = MC.InputHitTest(Mouse.GetPosition(e.Source as FrameworkElement))
6 as TextBlock;//本行代码是个关键，使用了WPF内置的碰撞检测
7 if (tb != null)
8 {
9
10 try
11 {
12 //获取选择的是哪一天
13 int.Parse(tb.Text);
14 }
15
16 catch (Exception ex) //Click The WeekDaysButton
17 {
18
19 //获取选择的是星期几，如果点击“周1、周2、...周7”按钮，程序会走到此处来得出星期几。
20 int indexofWeek = (tb.Parent as Grid).Children.IndexOf(tb);
21 //次方法能获取切换月份按钮后的当前月份
22 DateTime SelectedDay = this.MC.DisplayDate;
23 }
24 }
25 }
26 }
三、自定义日期的背景颜色
3.1、首先要自定义几个类，用于模板转换
1 public class CustemItems
2 {
3 bool isSpecific;
4
5 public bool IsSpecific
6 {
7 get { return isSpecific; }
8 set { isSpecific = value; }
9 }
10
11 DateTime d;
12
13 public DateTime Dete
14 {
15 get { return d; }
16 set { d = value; }
17 }
18 string s;
19
20 public string StrOfColor
21 {
22 get { return s; }
23 set { s = value; }
24 }
25 public CustemItems(DateTime d, string str)
26 {
27 Dete = d;
28 StrOfColor = str;
29 }
30 }
1 public class BlueLetterDayConverter : IValueConverter
2 {
3 public static List<CustemItems> dict = new List<CustemItems>();
4
5
6 static BlueLetterDayConverter()
7 {
8
9 }
10
11 public object Convert(object value, Type targetType,
12 object parameter, CultureInfo culture)
13 {
14 string text = null;
15 for (int i = 0; i < dict.Count; i++)
16 {
17 if (dict[i].Dete == (DateTime)value)
18 {
19 text = dict[i].StrOfColor;
20 }
21 }
22
23 return text;
24 }
25
26 public object ConvertBack(object value, Type targetType,
27 object parameter, CultureInfo culture)
28 {
29 return null;
30 }
31 public void Add(DateTime date, string str)
32 {
33 dict.Add(new CustemItems(date, str));
34 }
35
36 public static void Update(List<CustemItems> MIList)
37 {
38 dict.Clear();
39 dict = MIList;
40 }
41
42 }
public class RedLetterDayConverter : IValueConverter
{
public static List<CustemItems> dict = new List<CustemItems>();
static RedLetterDayConverter()
{
}
public object Convert(object value, Type targetType,
object parameter, CultureInfo culture)
{
string text = null;
for (int i = 0; i < dict.Count; i++)
{
if (dict[i].Dete == (DateTime)value)
{
text = dict[i].StrOfColor;
}
}
return text;
}
public object ConvertBack(object value, Type targetType,
object parameter, CultureInfo culture)
{
return null;
}
public void Add(DateTime date, string str)
{
dict.Add(new CustemItems(date, str));
}
public static void Update(List<CustemItems> MIList)
{
dict.Clear();
dict = MIList;
}
}
3.2 Calendar模板的定义
1 <Calendar x:Name="MC" HorizontalAlignment="Left" VerticalAlignment="Top"
2 MouseLeftButtonDown="MC_MouseLeftButtonUp"
3 >
4 <Calendar.CalendarDayButtonStyle>
5 <Style TargetType="{x:Type CalendarDayButton}">
6 <Setter Property="Template">
7 <Setter.Value>
8 <ControlTemplate TargetType="{x:Type CalendarDayButton}" x:Name="CalendarDayButtonControlTemplate">
9 <ControlTemplate.Resources>
10 <src:RedLetterDayConverter x:Key="convRed" />
11 <src:BlueLetterDayConverter x:Key="convBlue" />
12 </ControlTemplate.Resources>
13 <Grid>
14 <Rectangle x:Name="RedLetterDayBackground" IsHitTestVisible="False" Fill="Red"/>
15 <Rectangle x:Name="BlueLetterDayConverter" IsHitTestVisible="False" Fill="Blue"/>
16
17 <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
18 VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="5,1,5,1"/>
19 </Grid>
20 <ControlTemplate.Triggers>
21 <DataTrigger Binding="{Binding Converter={StaticResource convRed}}" Value="{x:Null}">
22 <Setter TargetName="RedLetterDayBackground" Property="Visibility" Value="Hidden" />
23 </DataTrigger>
24 <DataTrigger Binding="{Binding Converter={StaticResource convBlue}}" Value="{x:Null}">
25 <Setter TargetName="BlueLetterDayConverter" Property="Visibility" Value="Hidden" />
26 </DataTrigger>
27 </ControlTemplate.Triggers>
28 </ControlTemplate>
29 </Setter.Value>
30 </Setter>
31 </Style>
32 </Calendar.CalendarDayButtonStyle>
33
34 </Calendar>
3.3 更新转换模板的List
1 List<CustemItems> ItemListRed = new List<CustemItems>();
2 List<CustemItems> ItemListBule = new List<CustemItems>();
3
4 ...
5
6 RedLetterDayConverter.Update(ItemListRed);
7 BlueLetterDayConverter.Update(ItemListBule);
8 if (!StartTimer)
9 {
10 dispatcherTimer.Start();
11 }
3.4 重点：
因为从根本上讲ControlTemplate.Resources是一个静态的资源，它无法做到资源变更后，系统自动会通知控件（或者控件模板）去更新对应的UI显示，这个在《WPF程序设计指南[Charles Petzold]》书中的第535页至539页有详细介绍。所以我们要在变更RedLetterDayConverter 或者BlueLetterDayConverter里面的List<>对象以后，需要使用一个Timer去手动更新UI，从而触发模板的更新。
1 void dispatcherTimer_Tick(object sender, EventArgs e)
2 {
3 StartTimer = true;
4 MC.DisplayDate = MC.DisplayDate.AddMonths(1);
5 MC.DisplayDate = MC.DisplayDate.AddMonths(-1);
6 Thread.Sleep(50);
7 dispatcherTimer.Stop();
8 StartTimer = false;
9 }
完整的例子：
WPF--Calendar控件高级使用,布布扣,bubuko.com
时间： 2024-10-11 01:05:32