如何格式化DatePicker以显示日/月/年的日期格式? [英] How can I format a DatePicker to display the date format day / month / year?

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本文介绍了如何格式化DatePicker以显示日/月/年的日期格式?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在使用Windows Phone 8.1 与ComboBox选择器结合使用，但这对我来说不是一个选择.

有可能吗?

解决方案

编辑模板

在Xaml中，每个控件都有一种您可以操纵的样式，以更改其外观.控件也相互继承，例如，日期选择器由按钮和内容容器组成.按钮由边框和内容容器组成.

要更新日期选择器样式.从菜单中右键单击Visual Studio中的日期选择器控件，单击编辑模板"，然后单击编辑副本".对于此示例，您要在日期选择器模板...中编辑按钮模板的样式.

您还需要创建一个要在模板中使用的Converter类

这个答案对我有用带有日期选择器的页面... 

 <页面x:Class ="DatePikerAnswer.MainPage"xmlns ="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x ="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:local ="using:DatePikerAnswer"xmlns:d ="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc ="http://schemas.openxmlformats.org/markup-compatibility/2006"mc:Ignorable ="d"Background ="{ThemeResource ApplicationPageBackgroundThemeBrush}">< Page.Resources><！-格式转换器->< local:DateConverter x:Key ="FormatConverter"/><！-我的按钮样式->< Thickness x:Key ="PhoneBorderThickness"> 2.5</Thickness>< FontWeight x:Key ="PhoneButtonFontWeight"> Semibold</FontWeight>< x:Double x:Key ="TextStyleLargeFontSize"> 18.14</x:Double>< x:Double x:Key ="PhoneButtonMinHeight"> 57.5</x:Double>< x:Double x:Key ="PhoneButtonMinWidth"> 109</x:Double>< Thickness x:Key ="PhoneTouchTargetOverhang"> 0,9.5</Thickness>< SolidColorBrush x:Key ="ButtonDisabledBackgroundThemeBrush" Color ="Transparent"/>< Style x:Key ="MyButtonStyle" TargetType ="Button">< Setter Property ="Background" Value ="Transparent"/>< Setter Property ="BorderBrush" Value ="{ThemeResource PhoneForegroundBrush}"/>< Setter Property ="Foreground" Value ="{ThemeResource PhoneForegroundBrush}"/>< Setter Property ="BorderThickness" Value ="{ThemeResource PhoneBorderThickness}"/>< Setter Property ="FontFamily" Value ="{ThemeResource PhoneFontFamilyNormal}"/>< Setter Property ="FontWeight" Value ="{ThemeResource PhoneButtonFontWeight}"/>< Setter Property ="FontSize" Value ="{ThemeResource TextStyleLargeFontSize}"/>< Setter Property ="Padding" Value ="9.5,0"/>< Setter Property ="MinHeight" Value ="{ThemeResource PhoneButtonMinHeight}"/>< Setter属性="MinWidth"值="{ThemeResource PhoneButtonMinWidth}"/>< Setter Property ="Horizo​​ntalAlignment" Value =左"/>< Setter Property ="VerticalAlignment" Value ="Center"/>< Setter Property ="Template">< Setter.Value>< ControlTemplate TargetType ="Button">< Grid x:Name ="Grid" Background ="Transparent">< VisualStateManager.VisualStateGroups>< VisualStateGroup x:Name ="CommonStates">< VisualStateGroup.Transitions>< VisualTransition From ="Pressed" To ="PointerOver"><故事板>< PointerUpThemeAnimation Storyboard.TargetName ="Grid"/></Storyboard></VisualTransition>< VisualTransition从="PointerOver"到=普通"><故事板>< PointerUpThemeAnimation Storyboard.TargetName ="Grid"/></Storyboard></VisualTransition>< VisualTransition From ="Pressed" To ="Normal"><故事板>< PointerUpThemeAnimation Storyboard.TargetName ="Grid"/></Storyboard></VisualTransition></VisualStateGroup.Transitions>< VisualState x:Name ="Normal"/>< VisualState x:Name ="PointerOver"/>< VisualState x:Name ="Pressed"><故事板>< PointerDownThemeAnimation Storyboard.TargetName ="Grid"/>< ObjectAnimationUsingKeyFrames Storyboard.TargetProperty ="Foreground" Storyboard.TargetName ="ContentPresenter">< DiscreteObjectKeyFrame KeyTime ="0" Value ="{ThemeResource ButtonPressedForegroundThemeBrush}"/></ObjectAnimationUsingKeyFrames>< ObjectAnimationUsingKeyFrames Storyboard.TargetProperty ="Background" Storyboard.TargetName ="Border">< DiscreteObjectKeyFrame KeyTime ="0" Value ="{ThemeResource ButtonPressedBackgroundThemeBrush}"/></ObjectAnimationUsingKeyFrames></Storyboard></VisualState>< VisualState x:Name ="Disabled"><故事板>< ObjectAnimationUsingKeyFrames Storyboard.TargetProperty ="Foreground" Storyboard.TargetName ="ContentPresenter">< DiscreteObjectKeyFrame KeyTime ="0" Value ="{ThemeResource ButtonDisabledForegroundThemeBrush}"/></ObjectAnimationUsingKeyFrames>< ObjectAnimationUsingKeyFrames Storyboard.TargetProperty ="BorderBrush" Storyboard.TargetName ="Border">< DiscreteObjectKeyFrame KeyTime ="0" Value ="{ThemeResource ButtonDisabledBorderThemeBrush}"/></ObjectAnimationUsingKeyFrames>< ObjectAnimationUsingKeyFrames Storyboard.TargetProperty ="Background" Storyboard.TargetName ="Border">< DiscreteObjectKeyFrame KeyTime ="0" Value ="{ThemeResource ButtonDisabledBackgroundThemeBrush}"/></ObjectAnimationUsingKeyFrames></Storyboard></VisualState></VisualStateGroup></VisualStateManager.VisualStateGroups>< Border x:Name ="Border" BorderBrush ="{TemplateBinding BorderBrush}" BorderThickness ="{TemplateBinding BorderThickness}" Background ="{TemplateBinding Background}" Margin ="{ThemeResource PhoneTouchTargetOverhang}">< ContentPresenter x:Name ="ContentPresenter"AutomationProperties.AccessibilityView =原始"ContentTemplate ="{TemplateBinding ContentTemplate}"Content ="{绑定内容，RelativeSource = {RelativeSource TemplatedParent}，转换器= {StaticResource FormatConverter}，ConverterParameter = \ {0:dd/MM/yyyy \}}""Foreground ="{TemplateBinding Foreground}"Horizo​​ntalAlignment ="{TemplateBinding Horizo​​ntalContentAlignment}"Margin ="{TemplateBinding Padding}"VerticalAlignment ="{TemplateBinding VerticalContentAlignment}"/></Border></Grid></ControlTemplate></Setter.Value></Setter></样式><！-DatePicker样式->< FontFamily x:Key ="PhoneFontFamilyNormal"> Segoe WP</FontFamily>< x:Double x:Key ="ContentControlFontSize"> 20.26</x:Double>< Style x:Key ="MyDatePickerStyle1" TargetType ="DatePicker">< Setter Property ="FontFamily" Value ="{ThemeResource PhoneFontFamilyNormal}"/>< Setter Property ="FontSize" Value ="{ThemeResource ContentControlFontSize}"/>< Setter Property ="Foreground" Value ="{ThemeResource DatePickerForegroundThemeBrush}"/>< Setter Property ="Horizo​​ntalAlignment" Value =拉伸"/>< Setter Property ="Horizo​​ntalContentAlignment" Value =左"/>< Setter Property ="Template">< Setter.Value>< ControlTemplate TargetType ="DatePicker">< StackPanel x:Name ="LayoutRoot" Margin ="{TemplateBinding Padding}">< ContentPresenter x:Name ="HeaderContentPresenter"ContentTemplate ="{TemplateBinding HeaderTemplate}"Content ="{TemplateBinding Header}" Margin ="0,0,0，-3"Style ="{StaticResource HeaderContentPresenterStyle}"/>< Button x:Name ="FlyoutButton"BorderBrush ="{TemplateBinding前景}"BorderThickness ="2.5"Background ="{TemplateBinding Background}"Foreground ="{TemplateBinding Foreground}"Horizo​​ntalAlignment =拉伸"Horizo​​ntalContentAlignment ="{TemplateBinding Horizo​​ntalContentAlignment}"IsEnabled ="{TemplateBinding IsEnabled}"Style ="{StaticResource MyButtonStyle}"填充="6.5,0,0,3"/></StackPanel></ControlTemplate></Setter.Value></Setter></样式></Page.Resources><网格> 

 </Grid></Page>

转换器类... 

 使用系统；使用System.Collections.Generic;使用System.Globalization;使用System.Linq;使用System.Text;使用System.Threading.Tasks;使用Windows.UI.Xaml.Data;命名空间DatePikerAnswer{类DateConverter:IValueConverter{公共对象Convert(对象值，类型targetType，对象参数，字符串语言){如果(值！=空){///Convert Class引发异常，因此无法转换为日期时间字符串TheCurrentDate = value.ToString();string []值= TheCurrentDate.Split('/');字符串Day，Month，Year；天=值[1]；月=值[0]；年=值[2]；字符串retvalue = string.Format("{0}/{1}/{2}"，Day，Month，Year);返回retvalue;}返回值；}公共对象ConvertBack(对象值，类型targetType，对象参数，字符串语言){抛出新的NotImplementedException();}}}

最终结果是...

I'm using the Windows Phone 8.1 DatePicker

It's displaying the date as month/day/year by default and I can't see any way to change this to the 'correct' way of day/month/year.

This is how I declare the DatePicker

<DatePicker Name="datePicker" HorizontalAlignment="Center" MonthFormat="{}{month.full}"/>

displaying it as

I can see in the linked msdn article that I can use a DateTimeFormatter in conjunction with ComboBox selectors but that's not an option for me.

Is it possible?

解决方案

To Edit the Template

In Xaml every control has a style which you can manipulate, to change it's look and feel. Controls also inherit from one another, for example a date picker is made up of a button and a content container. And a button is made up of a border and a content container.

To Update the date pickers style.. Right click on the date picker control in visual studio from the Menu click edit template then click edit a copy. For this example you want to edit the style of the button template with in the date picker Template...

You will also need to create a Converter class to used in the template

This answer worked for me Page with date picker...

<Page
x:Class="DatePikerAnswer.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:DatePikerAnswer"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Page.Resources>
    <!-- Format Converter -->
    <local:DateConverter x:Key="FormatConverter"/>

    <!-- My Button Style-->
    <Thickness x:Key="PhoneBorderThickness">2.5</Thickness>
    <FontWeight x:Key="PhoneButtonFontWeight">Semibold</FontWeight>
    <x:Double x:Key="TextStyleLargeFontSize">18.14</x:Double>
    <x:Double x:Key="PhoneButtonMinHeight">57.5</x:Double>
    <x:Double x:Key="PhoneButtonMinWidth">109</x:Double>
    <Thickness x:Key="PhoneTouchTargetOverhang">0,9.5</Thickness>
    <SolidColorBrush x:Key="ButtonDisabledBackgroundThemeBrush" Color="Transparent"/>
    <Style x:Key="MyButtonStyle" TargetType="Button">
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderBrush" Value="{ThemeResource PhoneForegroundBrush}"/>
        <Setter Property="Foreground" Value="{ThemeResource PhoneForegroundBrush}"/>
        <Setter Property="BorderThickness" Value="{ThemeResource PhoneBorderThickness}"/>
        <Setter Property="FontFamily" Value="{ThemeResource PhoneFontFamilyNormal}"/>
        <Setter Property="FontWeight" Value="{ThemeResource PhoneButtonFontWeight}"/>
        <Setter Property="FontSize" Value="{ThemeResource TextStyleLargeFontSize}"/>
        <Setter Property="Padding" Value="9.5,0"/>
        <Setter Property="MinHeight" Value="{ThemeResource PhoneButtonMinHeight}"/>
        <Setter Property="MinWidth" Value="{ThemeResource PhoneButtonMinWidth}"/>
        <Setter Property="HorizontalAlignment" Value="Left"/>
        <Setter Property="VerticalAlignment" Value="Center"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="Button">
                    <Grid x:Name="Grid" Background="Transparent">
                        <VisualStateManager.VisualStateGroups>
                            <VisualStateGroup x:Name="CommonStates">
                                <VisualStateGroup.Transitions>
                                    <VisualTransition From="Pressed" To="PointerOver">
                                        <Storyboard>
                                            <PointerUpThemeAnimation Storyboard.TargetName="Grid"/>
                                        </Storyboard>
                                    </VisualTransition>
                                    <VisualTransition From="PointerOver" To="Normal">
                                        <Storyboard>
                                            <PointerUpThemeAnimation Storyboard.TargetName="Grid"/>
                                        </Storyboard>
                                    </VisualTransition>
                                    <VisualTransition From="Pressed" To="Normal">
                                        <Storyboard>
                                            <PointerUpThemeAnimation Storyboard.TargetName="Grid"/>
                                        </Storyboard>
                                    </VisualTransition>
                                </VisualStateGroup.Transitions>
                                <VisualState x:Name="Normal"/>
                                <VisualState x:Name="PointerOver"/>
                                <VisualState x:Name="Pressed">
                                    <Storyboard>
                                        <PointerDownThemeAnimation Storyboard.TargetName="Grid"/>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentPresenter">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonPressedForegroundThemeBrush}"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="Border">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonPressedBackgroundThemeBrush}"/>
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Disabled">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentPresenter">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonDisabledForegroundThemeBrush}"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="BorderBrush" Storyboard.TargetName="Border">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonDisabledBorderThemeBrush}"/>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="Border">
                                            <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ButtonDisabledBackgroundThemeBrush}"/>
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>
                        </VisualStateManager.VisualStateGroups>
                        <Border x:Name="Border" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Margin="{ThemeResource PhoneTouchTargetOverhang}">
                            <ContentPresenter x:Name="ContentPresenter"
                                              AutomationProperties.AccessibilityView="Raw" 
                                              ContentTemplate="{TemplateBinding ContentTemplate}" 
                                              Content="{Binding Content,  RelativeSource={RelativeSource TemplatedParent},Converter={StaticResource FormatConverter},ConverterParameter=\{0:dd/MM/yyyy\}}" 
                                              Foreground="{TemplateBinding Foreground}" 
                                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" 
                                              Margin="{TemplateBinding Padding}" 
                                              VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                        </Border>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--DatePicker Style-->
    <FontFamily x:Key="PhoneFontFamilyNormal">Segoe WP</FontFamily>
    <x:Double x:Key="ContentControlFontSize">20.26</x:Double>
    <Style x:Key="MyDatePickerStyle1" TargetType="DatePicker">
        <Setter Property="FontFamily" Value="{ThemeResource PhoneFontFamilyNormal}"/>
        <Setter Property="FontSize" Value="{ThemeResource ContentControlFontSize}"/>
        <Setter Property="Foreground" Value="{ThemeResource DatePickerForegroundThemeBrush}"/>
        <Setter Property="HorizontalAlignment" Value="Stretch"/>
        <Setter Property="HorizontalContentAlignment" Value="Left"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="DatePicker">
                    <StackPanel x:Name="LayoutRoot" Margin="{TemplateBinding Padding}">
                        <ContentPresenter x:Name="HeaderContentPresenter"
                                          ContentTemplate="{TemplateBinding HeaderTemplate}"
                                          Content="{TemplateBinding Header}" Margin="0,0,0,-3" 
                                          Style="{StaticResource HeaderContentPresenterStyle}"/>
                        <Button x:Name="FlyoutButton" 
                                BorderBrush="{TemplateBinding Foreground}" 
                                BorderThickness="2.5" 
                                Background="{TemplateBinding Background}" 
                                Foreground="{TemplateBinding Foreground}" 
                                HorizontalAlignment="Stretch" 
                                HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" 
                                IsEnabled="{TemplateBinding IsEnabled}"
                                Style="{StaticResource MyButtonStyle}"
                                Padding="6.5,0,0,3"/>
                    </StackPanel>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</Page.Resources>

 <Grid>


  </Grid>
</Page>

Converter Class ...

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Windows.UI.Xaml.Data;

namespace DatePikerAnswer
{
  class DateConverter : IValueConverter
  {
    public object Convert(object value, Type targetType, object parameter, string language)
    {
       if (value != null)
        {
            ///Convert Class throws exception so can not convert to date time
            string TheCurrentDate = value.ToString();

            string[] Values = TheCurrentDate.Split('/');
            string Day, Month, Year;

            Day = Values[1];
            Month = Values[0];
            Year = Values[2];

            string retvalue = string.Format("{0}/{1}/{2}", Day, Month, Year);
            return retvalue;
       }
        return value;
    }

    public object ConvertBack(object value, Type targetType, object parameter, string language)
    {
        throw new NotImplementedException();
    }
  }
}

The End Result is ...

这篇关于如何格式化DatePicker以显示日/月/年的日期格式?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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