WPF日期选取器格式

ee7vknir  于 2022-11-18  发布在  其他
关注(0)|答案(5)|浏览(113)

我从这个论坛得到了这个示例代码。

<DatePicker SelectedDate="{Binding myVideModelProperty}"
                Height="25" HorizontalAlignment="Left" Margin="81,-2,0,0" Name="myDatePicker" VerticalAlignment="Top" Width="115">
        <DatePicker.Resources>
            <Style TargetType="{x:Type DatePickerTextBox}">
                <Setter Property="Control.Template">
                    <Setter.Value>
                        <ControlTemplate>
                            <TextBox x:Name="PART_TextBox" 
                                Text="{Binding Path=SelectedDate, RelativeSource={RelativeSource AncestorType={x:Type DatePicker}}, StringFormat={}{0:yyyy/MM/dd}}" />
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </DatePicker.Resources>
    </DatePicker>

但是我希望yyyy/MM/dd的格式来自一个名为dateformat的应用程序属性。你能帮我把stringformat作为一个绑定到应用程序属性吗？

wpf

5条答案

按热度按时间
esbemjvw

esbemjvw1#

所有其他的答案看起来都有点复杂。它就像这样简单：

<DatePicker SelectedDate="{Binding PropertyName, StringFormat=dd/MM/yyyy}"/>

您需要做的就是调整字符串格式以适合自己。

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h43kikqp

h43kikqp2#

将此代码段用于DatePicker（您必须设置其样式）：

<DatePicker SelectedDate="{Binding myVideModelProperty}">
        <DatePicker.Resources>
            <Style TargetType="{x:Type DatePickerTextBox}">
                <Setter Property="Control.Template">
                    <Setter.Value>
                        <ControlTemplate>
                            <TextBox x:Name="PART_TextBox"
                                     Text="{Binding Path=SelectedDate, 
                                            RelativeSource={RelativeSource AncestorType={x:Type DatePicker}}, 
                                            StringFormat={x:Static local:App.DateFormat}}" />
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </DatePicker.Resources>
    </DatePicker>

将此代码段用于App.xaml.cs（将命名空间更改为有用的名称）：

namespace _24417730
{
    public partial class App
    {
        public static string DateFormat = "yyyy/MM/dd";
    }
}

在包含DatePicker的xaml控件中，定义XAML命名空间，如下所示：xmlns:local="clr-namespace:_24417730"
请注意，您必须将命名空间变更为用来定义应用程序类别的命名空间。
下面是我如何在MainWindow.xaml控件上定义xaml命名空间的：

<Window x:Class="_24417730.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:_24417730"
        Title="MainWindow" Height="350" Width="525">
    <StackPanel>
        <DatePicker SelectedDate="{Binding myVideModelProperty}">
            <DatePicker.Resources>
                <Style TargetType="{x:Type DatePickerTextBox}">
                    <Setter Property="Control.Template">
                        <Setter.Value>
                            <ControlTemplate>
                                <TextBox x:Name="PART_TextBox"
                                                 Text="{Binding Path=SelectedDate, 
                                                        RelativeSource={RelativeSource AncestorType={x:Type DatePicker}}, 
                                                        StringFormat={x:Static local:App.DateFormat}}" />
                            </ControlTemplate>
                        </Setter.Value>
                    </Setter>
                </Style>
            </DatePicker.Resources>
        </DatePicker>
    </StackPanel>
</Window>

此外，阅读Static Markup Extension和XAML Namespaces可能有助于将来的参考。
如果您需要进一步的说明，我将很乐意为您提供帮助。

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wztqucjr

wztqucjr3#

您可以使用转换器来实现这一点。或者您可以向类中添加另一个属性，它将返回带格式的日期。
带变频器

public class DateFormatConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return string.Format(Application.DateFormat, value);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
    }
}
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llmtgqce

llmtgqce4#

<Style TargetType="{x:Type DatePicker}">
    <Setter Property="Foreground" Value="#FF333333"/>
    <Setter Property="IsTodayHighlighted" Value="True"/>
    <Setter Property="SelectedDateFormat" Value="Short"/>
    <Setter Property="Background" Value="Transparent"/>
    <Setter Property="Padding" Value="2"/>
    <Setter Property="BorderBrush">
        <Setter.Value>
            <LinearGradientBrush EndPoint=".5,0" StartPoint=".5,1">
                <GradientStop Color="#FFA3AEB9" Offset="0"/>
                <GradientStop Color="#FF8399A9" Offset="0.375"/>
                <GradientStop Color="#FF718597" Offset="0.375"/>
                <GradientStop Color="#FF617584" Offset="1"/>
            </LinearGradientBrush>
        </Setter.Value>
    </Setter>
    <Setter Property="BorderThickness" Value="1"/>
    <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type DatePicker}">
                <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}">
                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="CommonStates">
                            <VisualState x:Name="Normal"/>
                            <VisualState x:Name="Disabled">
                                <Storyboard>
                                    <DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="PART_DisabledVisual"/>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                    <Grid x:Name="PART_Root" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
                        <Grid.Resources>
                            <SolidColorBrush x:Key="DisabledBrush" Color="#A5FFFFFF"/>
                            <ControlTemplate x:Key="DropDownButtonTemplate" TargetType="{x:Type Button}">
                                <Grid>
                                    <VisualStateManager.VisualStateGroups>
                                        <VisualStateGroup x:Name="CommonStates">
                                            <VisualStateGroup.Transitions>
                                                <VisualTransition GeneratedDuration="0"/>
                                                <VisualTransition GeneratedDuration="0:0:0.1" To="MouseOver"/>
                                                <VisualTransition GeneratedDuration="0:0:0.1" To="Pressed"/>
                                            </VisualStateGroup.Transitions>
                                            <VisualState x:Name="Normal"/>
                                            <VisualState x:Name="MouseOver">
                                                <Storyboard>
                                                    <ColorAnimation Duration="0" To="#FF448DCA" Storyboard.TargetProperty="(Border.Background).(SolidColorBrush.Color)" Storyboard.TargetName="Background"/>
                                                    <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetProperty="(Border.Background).(GradientBrush.GradientStops)[3].(GradientStop.Color)" Storyboard.TargetName="BackgroundGradient">
                                                        <SplineColorKeyFrame KeyTime="0" Value="#7FFFFFFF"/>
                                                    </ColorAnimationUsingKeyFrames>
                                                    <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetProperty="(Border.Background).(GradientBrush.GradientStops)[2].(GradientStop.Color)" Storyboard.TargetName="BackgroundGradient">
                                                        <SplineColorKeyFrame KeyTime="0" Value="#CCFFFFFF"/>
                                                    </ColorAnimationUsingKeyFrames>
                                                    <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetProperty="(Border.Background).(GradientBrush.GradientStops)[1].(GradientStop.Color)" Storyboard.TargetName="BackgroundGradient">
                                                        <SplineColorKeyFrame KeyTime="0" Value="#F2FFFFFF"/>
                                                    </ColorAnimationUsingKeyFrames>
                                                </Storyboard>
                                            </VisualState>
                                            <VisualState x:Name="Pressed">
                                                <Storyboard>
                                                    <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetProperty="(Border.Background).(SolidColorBrush.Color)" Storyboard.TargetName="Background">
                                                        <SplineColorKeyFrame KeyTime="0" Value="#FF448DCA"/>
                                                    </ColorAnimationUsingKeyFrames>
                                                    <DoubleAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="Highlight">
                                                        <SplineDoubleKeyFrame KeyTime="0" Value="1"/>
                                                    </DoubleAnimationUsingKeyFrames>
                                                    <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetProperty="(Border.Background).(GradientBrush.GradientStops)[1].(GradientStop.Color)" Storyboard.TargetName="BackgroundGradient">
                                                        <SplineColorKeyFrame KeyTime="0" Value="#EAFFFFFF"/>
                                                    </ColorAnimationUsingKeyFrames>
                                                    <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetProperty="(Border.Background).(GradientBrush.GradientStops)[2].(GradientStop.Color)" Storyboard.TargetName="BackgroundGradient">
                                                        <SplineColorKeyFrame KeyTime="0" Value="#C6FFFFFF"/>
                                                    </ColorAnimationUsingKeyFrames>
                                                    <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetProperty="(Border.Background).(GradientBrush.GradientStops)[3].(GradientStop.Color)" Storyboard.TargetName="BackgroundGradient">
                                                        <SplineColorKeyFrame KeyTime="0" Value="#6BFFFFFF"/>
                                                    </ColorAnimationUsingKeyFrames>
                                                    <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetProperty="(Border.Background).(GradientBrush.GradientStops)[0].(GradientStop.Color)" Storyboard.TargetName="BackgroundGradient">
                                                        <SplineColorKeyFrame KeyTime="0" Value="#F4FFFFFF"/>
                                                    </ColorAnimationUsingKeyFrames>
                                                </Storyboard>
                                            </VisualState>
                                            <VisualState x:Name="Disabled"/>
                                        </VisualStateGroup>
                                    </VisualStateManager.VisualStateGroups>
                                    <Grid Background="#11FFFFFF" FlowDirection="LeftToRight" HorizontalAlignment="Center" Height="18" Margin="0" VerticalAlignment="Center" Width="19">
                                        <Grid.ColumnDefinitions>
                                            <ColumnDefinition Width="20*"/>
                                            <ColumnDefinition Width="20*"/>
                                            <ColumnDefinition Width="20*"/>
                                            <ColumnDefinition Width="20*"/>
                                        </Grid.ColumnDefinitions>
                                        <Grid.RowDefinitions>
                                            <RowDefinition Height="23*"/>
                                            <RowDefinition Height="19*"/>
                                            <RowDefinition Height="19*"/>
                                            <RowDefinition Height="19*"/>
                                        </Grid.RowDefinitions>
                                        <Border x:Name="Highlight" BorderBrush="#FF45D6FA" BorderThickness="1" Grid.ColumnSpan="4" CornerRadius="0,0,1,1" Margin="-1" Opacity="0" Grid.Row="0" Grid.RowSpan="4"/>
                                        <Border x:Name="Background" BorderBrush="#FFFFFFFF" BorderThickness="1" Background="#FF1F3B53" Grid.ColumnSpan="4" CornerRadius=".5" Margin="0,-1,0,0" Opacity="1" Grid.Row="1" Grid.RowSpan="3"/>
                                        <Border x:Name="BackgroundGradient" BorderBrush="#BF000000" BorderThickness="1" Grid.ColumnSpan="4" CornerRadius=".5" Margin="0,-1,0,0" Opacity="1" Grid.Row="1" Grid.RowSpan="3">
                                            <Border.Background>
                                                <LinearGradientBrush EndPoint=".7,1" StartPoint=".7,0">
                                                    <GradientStop Color="#FFFFFFFF" Offset="0"/>
                                                    <GradientStop Color="#F9FFFFFF" Offset="0.375"/>
                                                    <GradientStop Color="#E5FFFFFF" Offset="0.625"/>
                                                    <GradientStop Color="#C6FFFFFF" Offset="1"/>
                                                </LinearGradientBrush>
                                            </Border.Background>
                                        </Border>
                                        <Rectangle Grid.ColumnSpan="4" Grid.RowSpan="1" StrokeThickness="1">
                                            <Rectangle.Fill>
                                                <LinearGradientBrush EndPoint="0.3,-1.1" StartPoint="0.46,1.6">
                                                    <GradientStop Color="#FF4084BD"/>
                                                    <GradientStop Color="#FFAFCFEA" Offset="1"/>
                                                </LinearGradientBrush>
                                            </Rectangle.Fill>
                                            <Rectangle.Stroke>
                                                <LinearGradientBrush EndPoint="0.48,-1" StartPoint="0.48,1.25">
                                                    <GradientStop Color="#FF494949"/>
                                                    <GradientStop Color="#FF9F9F9F" Offset="1"/>
                                                </LinearGradientBrush>
                                            </Rectangle.Stroke>
                                        </Rectangle>
                                        <Path Grid.ColumnSpan="4" Grid.Column="0" Data="M11.426758,8.4305077 L11.749023,8.4305077 L11.749023,16.331387 L10.674805,16.331387 L10.674805,10.299648 L9.0742188,11.298672 L9.0742188,10.294277 C9.4788408,10.090176 9.9094238,9.8090878 10.365967,9.4510155 C10.82251,9.0929432 11.176106,8.7527733 11.426758,8.4305077 z M14.65086,8.4305077 L18.566387,8.4305077 L18.566387,9.3435936 L15.671368,9.3435936 L15.671368,11.255703 C15.936341,11.058764 16.27293,10.960293 16.681133,10.960293 C17.411602,10.960293 17.969301,11.178717 18.354229,11.615566 C18.739157,12.052416 18.931622,12.673672 18.931622,13.479336 C18.931622,15.452317 18.052553,16.438808 16.294415,16.438808 C15.560365,16.438808 14.951641,16.234707 14.468243,15.826504 L14.881817,14.929531 C15.368796,15.326992 15.837872,15.525723 16.289043,15.525723 C17.298809,15.525723 17.803692,14.895514 17.803692,13.635098 C17.803692,12.460618 17.305971,11.873379 16.310528,11.873379 C15.83071,11.873379 15.399232,12.079271 15.016094,12.491055 L14.65086,12.238613 z" Fill="#FF2F2F2F" HorizontalAlignment="Center" Margin="4,3,4,3" Grid.Row="1" Grid.RowSpan="3" RenderTransformOrigin="0.5,0.5" Stretch="Fill" VerticalAlignment="Center"/>
                                        <Ellipse Grid.ColumnSpan="4" Fill="#FFFFFFFF" HorizontalAlignment="Center" Height="3" StrokeThickness="0" VerticalAlignment="Center" Width="3"/>
                                        <Border x:Name="DisabledVisual" BorderBrush="#B2FFFFFF" BorderThickness="1" Grid.ColumnSpan="4" CornerRadius="0,0,.5,.5" Opacity="0" Grid.Row="0" Grid.RowSpan="4"/>
                                    </Grid>
                                </Grid>
                            </ControlTemplate>
                        </Grid.Resources>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="Auto"/>
                        </Grid.ColumnDefinitions>
                        <Button x:Name="PART_Button" Grid.Column="1" Foreground="{TemplateBinding Foreground}" Focusable="False" HorizontalAlignment="Left" Margin="3,0,3,0" Grid.Row="0" Template="{StaticResource DropDownButtonTemplate}" VerticalAlignment="Top" Width="20"/>

                        <DatePickerTextBox x:Name="PART_TextBox" Grid.Column="0" Focusable="{TemplateBinding Focusable}" HorizontalContentAlignment="Stretch" Grid.Row="0" VerticalContentAlignment="Stretch" Text="{Binding SelectedDate,RelativeSource={RelativeSource TemplatedParent},StringFormat='dd/MM/yyyy'}" />
                        <Grid x:Name="PART_DisabledVisual" Grid.ColumnSpan="2" Grid.Column="0" IsHitTestVisible="False" Opacity="0" Grid.Row="0">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="*"/>
                                <ColumnDefinition Width="Auto"/>
                            </Grid.ColumnDefinitions>
                            <Rectangle Grid.Column="0" Fill="#A5FFFFFF" RadiusY="1" Grid.Row="0" RadiusX="1"/>
                            <Rectangle Grid.Column="1" Fill="#A5FFFFFF" Height="18" Margin="3,0,3,0" RadiusY="1" Grid.Row="0" RadiusX="1" Width="19"/>
                            <Popup x:Name="PART_Popup" AllowsTransparency="True" Placement="Bottom" PlacementTarget="{Binding ElementName=PART_TextBox}" StaysOpen="False"/>
                        </Grid>
                    </Grid>
                </Border>
                <ControlTemplate.Triggers>
                    <DataTrigger Binding="{Binding Source={x:Static SystemParameters.HighContrast}}" Value="false">
                        <Setter Property="Foreground" TargetName="PART_TextBox" Value="{Binding Foreground, RelativeSource={RelativeSource TemplatedParent}}"/>
                    </DataTrigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>
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yquaqz18

yquaqz185#

为DatePickerTextBox添加一个Style，如下所示，不需要CultureInfo，使用StringFormat生成所需的格式：

<DatePicker SelectedDate="{Binding myProperty}">
    <DatePicker.Resources>
        <Style TargetType="{x:Type DatePickerTextBox}">
            <Setter Property="Control.Template">
                <Setter.Value>
                    <ControlTemplate>
                        <TextBox x:Name="PART_TextBox" Text="{Binding Path=SelectedDate, StringFormat='dd MMMM yyyy', RelativeSource={RelativeSource AncestorType={x:Type DatePicker}}}" />
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </DatePicker.Resources>
</DatePicker>
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