logo标签列表

WPF日期选择器格式化

c#wpfvb.netdate-format
10
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>

我希望日期格式（yyyy/MM/dd）可以从一个名为dateformat的应用程序属性中获取。你能帮我把stringformat作为绑定到应用程序属性吗？

6个回答
13

其他所有答案似乎都有点复杂。其实很简单：

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

你需要做的是调整字符串格式以适应自己的需求。

终于，这是正确的答案！我希望我能给你点赞不止一次。我已经搜索了太久以找到正确的答案，最终在这个隐藏的帖子底部找到了零点赞的正确答案... - Xavier Peña
尽管现在我遇到了与这个解决方案相关的不同问题。对于那些可能感兴趣的人：https://dev59.com/z5Tfa4cB1Zd3GeqPYPd8 - Xavier Peña
5
绑定字符串时可能有效，但绑定日期时间时无效。 - Catarina Ferreira
4
使用此片段作为您的日期选择器（您需要对其进行样式设置）：
    <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>

请使用此片段替换 App.xaml.cs（将命名空间更改为有用的内容）：
namespace _24417730
{
    public partial class App
    {
        public static string DateFormat = "yyyy/MM/dd";
    }
}

在包含您的DatePicker的xaml控件中，定义一个XAML命名空间，如下所示：xmlns:local="clr-namespace:_24417730" 请注意，您将不得不将命名空间更改为您用于定义应用程序类的命名空间。
以下是我在MainWindow.xaml控件上定义xaml命名空间的方法：
<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，阅读静态标记扩展和XAML命名空间可能有助于以后的参考。
如果需要进一步澄清，我很乐意提供帮助。
它在Application.xaml.vb中被定义为静态属性。 - Indu
这个页面上的任何答案都应该能解决你的问题。如果你需要更清晰的指导，请告诉我，我会修订我的初始答案并提供一个更完整适用的示例。 - Tyler Kendrick
我第一次在WPF上工作。我遇到了错误 - 找不到类型“Application”。请注意，类型名称区分大小写。我已经像这样定义了本地：xmlns:local="clr-namespace:BillingApp"，BillingApp是根程序集命名空间。Application.xaml.vb中没有定义任何命名空间。 - Indu
很可能你的DataContext没有在Application.xaml中设置。如果你将设置绑定到退出事件的xaml部分发布，并告诉我它在哪个文件中，我很可能可以给你解决方案。 - Tyler Kendrick
看起来你描述的问题与此帖子中描述的原始问题完全不同。如果你发布一个新的问题，并提供关于如何/何时调用此事件的详细信息，我很乐意帮助你。只需在此处发布新问题的链接，或向我发送链接的消息即可。 - Tyler Kendrick
显示剩余3条评论
1
你可以使用转换器来实现这个功能。 或者你可以给你的类添加另一个属性，用于返回格式化后的日期。
使用转换器：
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)
    {
    }
}
0
大多数情况下，当你想改变日期格式时，通常是因为你选择了错误的文化设置。
正确设置当前线程的文化设置：
Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture("fr-FR");

如果这样的文化格式仍然不适合您，您可以通过CultureInfo的ShortDatePattern和LongDatePattern属性进行更改。

ci.DateTimeFormat.ShortDatePattern = "dd/MM/yyyy"; //where ci a CultureInfo object

最后，您可以通过SelectedDateFormat属性告诉DatePicker首选Short或Long格式。

0
在编程相关中，添加代码如下所示的 DatePickerTextBox 的样式，不需要使用 CultureInfo，通过 StringFormat 来设置你想要的格式：
<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>
0

<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>

网页内容由stack overflow 提供, 点击上面的
可以查看英文原文，
原文链接