WPF自定义控件

封装了一个选择年月的控件，XAML代码：

<UserControl x:Class="SunCreate.CombatPlatform.Client.DateMonthPicker"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Height="23" Loaded="UserControl_Loaded">
    <UserControl.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="/SunCreate.CombatPlatform.Client.Resources;Component/Resource/DateTimePickerResource.xaml" />
            </ResourceDictionary.MergedDictionaries>
            <Style TargetType="ToggleButton" x:Key="stlToggleButton">
                <Setter Property="Foreground" Value="White"></Setter>
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate>
                            <Border x:Name="Back" Background="Transparent" BorderThickness="0" BorderBrush="Transparent">
                                <Path Name="PathFill" Fill="#1b94e0" Width="8" Height="6" StrokeThickness="0" Data="M5,0 L10,10 L0,10 z" RenderTransformOrigin="0.5,0.5" Stretch="Fill">
                                    <Path.RenderTransform>
                                        <TransformGroup>
                                            <ScaleTransform/>
                                            <SkewTransform/>
                                            <RotateTransform Angle="180"/>
                                            <TranslateTransform/>
                                        </TransformGroup>
                                    </Path.RenderTransform>
                                </Path>
                            </Border>
                            <ControlTemplate.Triggers>
                                <Trigger Property="IsMouseOver" Value="True">
                                    <Setter TargetName="PathFill" Property="Fill" Value="#1b94e0"></Setter>
                                    <Setter TargetName="Back" Property="Background" Value="Transparent"></Setter>
                                    <Setter TargetName="Back" Property="BorderBrush" Value="Transparent"></Setter>
                                </Trigger>
                            </ControlTemplate.Triggers>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
            <Style TargetType="ComboBox" x:Key="stlComboBox">
                <Setter Property="SnapsToDevicePixels" Value="True"/>
                <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
                <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
                <Setter Property="ScrollViewer.CanContentScroll" Value="True"/>
                <Setter Property="HorizontalAlignment" Value="Left"></Setter>
                <Setter Property="Foreground" Value="Black"></Setter>
                <Setter Property="Height" Value="30"></Setter>
                <Setter Property="Margin" Value="0,0,0,0"></Setter>
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="ComboBox">
                            <Grid>
                                <Grid.Background>
                                    <ImageBrush ImageSource="/SunCreate.CombatPlatform.Client.Resources;component/Image/Face/1比n人脸比对/输入框.png"/>
                                </Grid.Background>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="0.7*"/>
                                    <ColumnDefinition Width="0.3*" MaxWidth="30" MinWidth="18"/>
                                </Grid.ColumnDefinitions>
                                <TextBox  Grid.Column="0" IsReadOnly="True" Foreground="#1ba4f6" BorderThickness="1" BorderBrush="Transparent"  Text="{TemplateBinding Text}" Background="Transparent"></TextBox>
                                <Border  Grid.Column="0" BorderThickness="0" Background="Transparent">
                                </Border>
                                <Border Grid.Column="1" BorderThickness="0" CornerRadius="0,1,1,0" Background="Transparent">
                                    <ToggleButton Style="{StaticResource stlToggleButton}" IsChecked="{Binding Path=IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" ClickMode="Press"></ToggleButton>
                                </Border>
                                <Popup IsOpen="{TemplateBinding IsDropDownOpen}" Placement="Bottom" x:Name="Popup" Focusable="False" AllowsTransparency="True" PopupAnimation="Slide">
                                    <Border CornerRadius="1" MaxHeight="{TemplateBinding MaxDropDownHeight}" MinWidth="{TemplateBinding ActualWidth}" x:Name="DropDown" SnapsToDevicePixels="True" Background="Transparent">
                                        <Border.Effect>
                                            <DropShadowEffect Color="#1ba4f6" BlurRadius="2" ShadowDepth="0" Opacity="0.5"/>
                                        </Border.Effect>
                                        <ScrollViewer Margin="4,6,4,6" Style="{DynamicResource ScrollViewerStyle}" MaxHeight="{TemplateBinding MaxDropDownHeight}" SnapsToDevicePixels="True" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" CanContentScroll="True">
                                            <!-- StackPanel 用于显示子级，方法是将 IsItemsHost 设置为 True -->
                                            <StackPanel IsItemsHost="True" KeyboardNavigation.DirectionalNavigation="Contained" Background="#1ba4f6"/>
                                        </ScrollViewer>
                                    </Border>
                                </Popup>
                            </Grid>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </ResourceDictionary>
    </UserControl.Resources>
    <Grid>
        <StackPanel Orientation="Horizontal">
            <ComboBox Grid.Column ="2" Grid.Row="0" Name="cbYear" SelectionChanged="cbYear_SelectionChanged"  SelectedValuePath="Text" DisplayMemberPath="Text" Height="25" Width="55" Style="{StaticResource stlComboBox}" VerticalAlignment ="Center"  >
            </ComboBox>
            <TextBlock Text="年" Margin="5 0 5 0" VerticalAlignment="Center" Foreground="#1ba4f6" />
            <ComboBox Grid.Column ="2" Grid.Row="0" Name="cbMonth" SelectionChanged="cbMonth_SelectionChanged" SelectedValuePath="Text" DisplayMemberPath="Text" Height="25" Width="40" Style="{StaticResource stlComboBox}" VerticalAlignment ="Center" >
            </ComboBox>
            <TextBlock Text="月" Margin="5 0 5 0" VerticalAlignment="Center" Foreground="#1ba4f6" />
        </StackPanel>
    </Grid>
</UserControl>

后台代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.ComponentModel;

namespace SunCreate.CombatPlatform.Client
{
    /// <summary>
    /// 
    /// </summary>
    public partial class DateMonthPicker : UserControl, INotifyPropertyChanged
    {
        private DateTime _selectedMonth;
        public static DependencyProperty selectedTimeProperty;

        static DateMonthPicker()
        {
            selectedTimeProperty = DependencyProperty.Register("SelectedMonth", typeof(DateTime), typeof(DateMonthPicker), new PropertyMetadata(DateTime.Now, new PropertyChangedCallback(SelectedMonthChanged)));
        }

        public DateMonthPicker()
        {
            InitializeComponent();

            int currentYear = DateTime.Now.Year;
            int currentMonth = DateTime.Now.Month;
            List<object> yearList = new List<object>();
            for (int i = currentYear - 20; i <= currentYear; i++)
            {
                yearList.Add(new { Text = i.ToString() });
            }
            cbYear.ItemsSource = yearList;

            cbMonth.ItemsSource = new List<object>() { 
                new { Text = "1" },
                new { Text = "2" },
                new { Text = "3" },
                new { Text = "4" },
                new { Text = "5" },
                new { Text = "6" },
                new { Text = "7" },
                new { Text = "8" },
                new { Text = "9" },
                new { Text = "10" },
                new { Text = "11" },
                new { Text = "12" }};

            this._selectedMonth = DateTime.Now;
        }

        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            cbYear.SelectedValue = _selectedMonth.Year.ToString();
            cbMonth.SelectedValue = _selectedMonth.Month.ToString();
        }

        private static void SelectedMonthChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
        {
            (obj as DateMonthPicker).ChangeSelect(e.NewValue);
        }

        private void ChangeSelect(object value)
        {
            _selectedMonth = (DateTime)value;
            cbYear.SelectedValue = _selectedMonth.Year.ToString();
            cbMonth.SelectedValue = _selectedMonth.Month.ToString();
        }

        public DateTime SelectedMonth
        {
            get { return (DateTime)this.GetValue(DateMonthPicker.selectedTimeProperty); }
            set { this.SetValue(DateMonthPicker.selectedTimeProperty, value); }
        }

        public DateTime StartDay
        {
            get
            {
                return this._selectedMonth.AddDays(1 - this._selectedMonth.Day).Date;
            }
        }

        public DateTime EndDay
        {
            get
            {
                return this.StartDay.AddMonths(1).AddDays(-1);
            }
        }

        #region INotifyPropertyChanged 成员
        public event PropertyChangedEventHandler PropertyChanged;
        private void SendPropertyChanged(String propertyName)
        {
            if (PropertyChanged != null)
                this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
        #endregion

        private void cbYear_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            ComboBox cb = sender as ComboBox;
            if (this._selectedMonth != DateTime.MinValue && cb.SelectedValue != null)
            {
                this._selectedMonth = new DateTime(Convert.ToInt32(cb.SelectedValue), this._selectedMonth.Month, 1);
                SelectedMonth = this._selectedMonth;
            }
        }

        private void cbMonth_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            ComboBox cb = sender as ComboBox;
            if (this._selectedMonth != DateTime.MinValue && cb.SelectedValue != null)
            {
                this._selectedMonth = new DateTime(this._selectedMonth.Year, Convert.ToInt32(cb.SelectedValue), 1);
                SelectedMonth = this._selectedMonth;
            }
        }
    }
}

效果图：