logo标签列表

从DatePicker中获取日期，格式为yyyy/MM/dd

c#wpfxamlmvvmdatepicker
7

我有一个WPF C#应用程序(.NET 4.0)，并且我有一个日期选择器。我想知道是否可以更改日期格式(日期选择器的文本属性)为yyyy/MM/dd格式。

我正在使用MVVM模式，因此我想知道XAML代码，如果可能的话，在这个地方进行更改。

3个回答
6
我可以使用这段代码：
<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>

使用datePicker资源，我可以设置其textBox的格式。这样一来，就不需要转换器、通用模板或任何其他额外的代码。
1

使用此代码作为您的日期选择器模板，并使用此值转换器。在模板中，带有DatePickerTextBox的行已被修改为使用您请求的yyyy/MM/dd格式（通过转换器）。我修改的模板来自这里。

示例用法：

<DatePicker Template="{StaticResource SpecialDatePicker}" SelectedDate="{Binding Path=Date}" />

数值转换器代码：

public class DateFixerConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return DateTime.Parse((string)value).ToString("yyyy/MM/dd");
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return DateTime.Parse((string) value);
    }
}

模板代码：

    <ControlTemplate x:Key="SpecialDatePicker" TargetType="DatePicker">
        <Border BorderThickness="{TemplateBinding Border.BorderThickness}" Padding="{TemplateBinding Control.Padding}" BorderBrush="{TemplateBinding Border.BorderBrush}" Background="{TemplateBinding Panel.Background}">
            <Grid Name="PART_Root" HorizontalAlignment="{TemplateBinding Control.HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding Control.VerticalContentAlignment}">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="Auto" />
                </Grid.ColumnDefinitions>
                <Grid.Resources>
                    <SolidColorBrush x:Key="DisabledBrush">#A5FFFFFF</SolidColorBrush>
                    <ControlTemplate TargetType="Button" x:Key="DropDownButtonTemplate">
                        <Grid>
                            <Grid Background="#11FFFFFF" Width="19" Height="18" FlowDirection="LeftToRight" Margin="0,0,0,0" HorizontalAlignment="Center" VerticalAlignment="Center">
                                <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 BorderThickness="1,1,1,1" CornerRadius="0,0,1,1" BorderBrush="#FF45D6FA" Name="Highlight" Margin="-1,-1,-1,-1" Opacity="0" Grid.Row="0" Grid.ColumnSpan="4" Grid.RowSpan="4" />
                                <Border BorderThickness="1,1,1,1" CornerRadius="0.5,0.5,0.5,0.5" BorderBrush="#FFFFFFFF" Background="#FF1F3B53" Name="Background" Margin="0,-1,0,0" Opacity="1" Grid.Row="1" Grid.ColumnSpan="4" Grid.RowSpan="3" />
                                <Border BorderThickness="1,1,1,1" CornerRadius="0.5,0.5,0.5,0.5" BorderBrush="#BF000000" Name="BackgroundGradient" Margin="0,-1,0,0" Opacity="1" Grid.Row="1" Grid.ColumnSpan="4" Grid.RowSpan="3">
                                    <Border.Background>
                                        <LinearGradientBrush StartPoint="0.7,0" EndPoint="0.7,1">
                                            <LinearGradientBrush.GradientStops>
                                                <GradientStop Color="#FFFFFFFF" Offset="0" />
                                                <GradientStop Color="#F9FFFFFF" Offset="0.375" />
                                                <GradientStop Color="#E5FFFFFF" Offset="0.625" />
                                                <GradientStop Color="#C6FFFFFF" Offset="1" />
                                            </LinearGradientBrush.GradientStops>
                                        </LinearGradientBrush>
                                    </Border.Background>
                                </Border>
                                <Rectangle StrokeThickness="1" Grid.ColumnSpan="4" Grid.RowSpan="1">
                                    <Rectangle.Fill>
                                        <LinearGradientBrush StartPoint="0.46,1.6" EndPoint="0.3,-1.1">
                                            <LinearGradientBrush.GradientStops>
                                                <GradientStop Color="#FF4084BD" />
                                                <GradientStop Color="#FFAFCFEA" Offset="1" />
                                            </LinearGradientBrush.GradientStops>
                                        </LinearGradientBrush>
                                    </Rectangle.Fill>
                                    <Rectangle.Stroke>
                                        <LinearGradientBrush StartPoint="0.48,1.25" EndPoint="0.48,-1">
                                            <LinearGradientBrush.GradientStops>
                                                <GradientStop Color="#FF494949" />
                                                <GradientStop Color="#FF9F9F9F" Offset="1" />
                                            </LinearGradientBrush.GradientStops>
                                        </LinearGradientBrush>
                                    </Rectangle.Stroke>
                                </Rectangle>
                                <Path Data="M11.426758,8.4305077L11.749023,8.4305077 11.749023,16.331387 10.674805,16.331387 10.674805,10.299648 9.0742188,11.298672 9.0742188,10.294277C9.4788408,10.090176 9.9094238,9.8090878 10.365967,9.4510155 10.82251,9.0929432 11.176106,8.7527733 11.426758,8.4305077z M14.65086,8.4305077L18.566387,8.4305077 18.566387,9.3435936 15.671368,9.3435936 15.671368,11.255703C15.936341,11.058764 16.27293,10.960293 16.681133,10.960293 17.411602,10.960293 17.969301,11.178717 18.354229,11.615566 18.739157,12.052416 18.931622,12.673672 18.931622,13.479336 18.931622,15.452317 18.052553,16.438808 16.294415,16.438808 15.560365,16.438808 14.951641,16.234707 14.468243,15.826504L14.881817,14.929531C15.368796,15.326992 15.837872,15.525723 16.289043,15.525723 17.298809,15.525723 17.803692,14.895514 17.803692,13.635098 17.803692,12.460618 17.305971,11.873379 16.310528,11.873379 15.83071,11.873379 15.399232,12.079271 15.016094,12.491055L14.65086,12.238613z" Stretch="Fill" Fill="#FF2F2F2F" Margin="4,3,4,3" HorizontalAlignment="Center" VerticalAlignment="Center" RenderTransformOrigin="0.5,0.5" Grid.Column="0" Grid.Row="1" Grid.ColumnSpan="4" Grid.RowSpan="3" />
                                <Ellipse Fill="#FFFFFFFF" StrokeThickness="0" Width="3" Height="3" HorizontalAlignment="Center" VerticalAlignment="Center" Grid.ColumnSpan="4" />
                                <Border BorderThickness="1,1,1,1" CornerRadius="0,0,0.5,0.5" BorderBrush="#B2FFFFFF" Name="DisabledVisual" Opacity="0" Grid.Row="0" Grid.ColumnSpan="4" Grid.RowSpan="4" />
                            </Grid>
                        </Grid>
                    </ControlTemplate>
                </Grid.Resources>
                <Button Foreground="{TemplateBinding TextElement.Foreground}" Name="PART_Button" Width="20" Margin="3,0,3,0" HorizontalAlignment="Left" VerticalAlignment="Top" Focusable="False" Grid.Column="1" Grid.Row="0">
                    <Button.Template>
                        <ControlTemplate TargetType="Button">
                            <Grid>
                                <Grid Background="#11FFFFFF" Width="19" Height="18" FlowDirection="LeftToRight" Margin="0,0,0,0" HorizontalAlignment="Center" VerticalAlignment="Center">
                                    <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 BorderThickness="1,1,1,1" CornerRadius="0,0,1,1" BorderBrush="#FF45D6FA" Name="Highlight" Margin="-1,-1,-1,-1" Opacity="0" Grid.Row="0" Grid.ColumnSpan="4" Grid.RowSpan="4" />
                                    <Border BorderThickness="1,1,1,1" CornerRadius="0.5,0.5,0.5,0.5" BorderBrush="#FFFFFFFF" Background="#FF1F3B53" Name="Background" Margin="0,-1,0,0" Opacity="1" Grid.Row="1" Grid.ColumnSpan="4" Grid.RowSpan="3" />
                                    <Border BorderThickness="1,1,1,1" CornerRadius="0.5,0.5,0.5,0.5" BorderBrush="#BF000000" Name="BackgroundGradient" Margin="0,-1,0,0" Opacity="1" Grid.Row="1" Grid.ColumnSpan="4" Grid.RowSpan="3">
                                        <Border.Background>
                                            <LinearGradientBrush StartPoint="0.7,0" EndPoint="0.7,1">
                                                <LinearGradientBrush.GradientStops>
                                                    <GradientStop Color="#FFFFFFFF" Offset="0" />
                                                    <GradientStop Color="#F9FFFFFF" Offset="0.375" />
                                                    <GradientStop Color="#E5FFFFFF" Offset="0.625" />
                                                    <GradientStop Color="#C6FFFFFF" Offset="1" />
                                                </LinearGradientBrush.GradientStops>
                                            </LinearGradientBrush>
                                        </Border.Background>
                                    </Border>
                                    <Rectangle StrokeThickness="1" Grid.ColumnSpan="4" Grid.RowSpan="1">
                                        <Rectangle.Fill>
                                            <LinearGradientBrush StartPoint="0.46,1.6" EndPoint="0.3,-1.1">
                                                <LinearGradientBrush.GradientStops>
                                                    <GradientStop Color="#FF4084BD" />
                                                    <GradientStop Color="#FFAFCFEA" Offset="1" />
                                                </LinearGradientBrush.GradientStops>
                                            </LinearGradientBrush>
                                        </Rectangle.Fill>
                                        <Rectangle.Stroke>
                                            <LinearGradientBrush StartPoint="0.48,1.25" EndPoint="0.48,-1">
                                                <LinearGradientBrush.GradientStops>
                                                    <GradientStop Color="#FF494949" />
                                                    <GradientStop Color="#FF9F9F9F" Offset="1" />
                                                </LinearGradientBrush.GradientStops>
                                            </LinearGradientBrush>
                                        </Rectangle.Stroke>
                                    </Rectangle>
                                    <Path Data="M11.426758,8.4305077L11.749023,8.4305077 11.749023,16.331387 10.674805,16.331387 10.674805,10.299648 9.0742188,11.298672 9.0742188,10.294277C9.4788408,10.090176 9.9094238,9.8090878 10.365967,9.4510155 10.82251,9.0929432 11.176106,8.7527733 11.426758,8.4305077z M14.65086,8.4305077L18.566387,8.4305077 18.566387,9.3435936 15.671368,9.3435936 15.671368,11.255703C15.936341,11.058764 16.27293,10.960293 16.681133,10.960293 17.411602,10.960293 17.969301,11.178717 18.354229,11.615566 18.739157,12.052416 18.931622,12.673672 18.931622,13.479336 18.931622,15.452317 18.052553,16.438808 16.294415,16.438808 15.560365,16.438808 14.951641,16.234707 14.468243,15.826504L14.881817,14.929531C15.368796,15.326992 15.837872,15.525723 16.289043,15.525723 17.298809,15.525723 17.803692,14.895514 17.803692,13.635098 17.803692,12.460618 17.305971,11.873379 16.310528,11.873379 15.83071,11.873379 15.399232,12.079271 15.016094,12.491055L14.65086,12.238613z" Stretch="Fill" Fill="#FF2F2F2F" Margin="4,3,4,3" HorizontalAlignment="Center" VerticalAlignment="Center" RenderTransformOrigin="0.5,0.5" Grid.Column="0" Grid.Row="1" Grid.ColumnSpan="4" Grid.RowSpan="3" />
                                    <Ellipse Fill="#FFFFFFFF" StrokeThickness="0" Width="3" Height="3" HorizontalAlignment="Center" VerticalAlignment="Center" Grid.ColumnSpan="4" />
                                    <Border BorderThickness="1,1,1,1" CornerRadius="0,0,0.5,0.5" BorderBrush="#B2FFFFFF" Name="DisabledVisual" Opacity="0" Grid.Row="0" Grid.ColumnSpan="4" Grid.RowSpan="4" />
                                </Grid>
                            </Grid>
                        </ControlTemplate>
                    </Button.Template>
                </Button>
                <!-- THIS LINE :: Notice the binding for Text -->
                <DatePickerTextBox  Text="{Binding RelativeSource={RelativeSource AncestorType=DatePicker},Path=Text,Converter={StaticResource DateFixer}}" Foreground="{TemplateBinding TextElement.Foreground}" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch" Name="PART_TextBox" Grid.Column="0" Grid.Row="0" xml:space="preserve"></DatePickerTextBox>
                <Grid Name="PART_DisabledVisual" Opacity="0" IsHitTestVisible="False" Grid.Column="0" Grid.Row="0" Grid.ColumnSpan="2">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*" />
                        <ColumnDefinition Width="Auto" />
                    </Grid.ColumnDefinitions>
                    <Rectangle RadiusX="1" RadiusY="1" Fill="#A5FFFFFF" Grid.Column="0" Grid.Row="0" />
                    <Rectangle RadiusX="1" RadiusY="1" Fill="#A5FFFFFF" Width="19" Height="18" Margin="3,0,3,0" Grid.Column="1" Grid.Row="0" />
                    <Popup Placement="Bottom" StaysOpen="False" AllowsTransparency="True" Name="PART_Popup" />
                </Grid>
            </Grid>
        </Border>
    </ControlTemplate>
0
根据这个帖子，你可以更改文化来获取正确的日期格式。
System.Globalization.CultureInfo culInfo = new System.Globalization.CultureInfo("en-us");
System.Globalization.DateTimeFormatInfo dtinfo = new System.Globalization.DateTimeFormatInfo();
dtinfo.ShortDatePattern = "yyyy/MM/dd";
但这是在axml文件中吗？我想使用MVVM模式。谢谢。 - Álvaro García
这不是放在XAML中的，请您在示例中插入一些代码，以便我更清楚地理解问题。 - Mattias Josefsson
1
@Daimroc MVVM 不意味着“在 XAML 中完成所有事情”。 - svick
@svick: 但我认为演示应该在axml中完成。如果我有一个多语言的应用程序，我只想更改日期的格式，这是axml的责任。 - Álvaro García
在Xaml中没有指定格式的能力。因此，您的选择是：调整文化设置或重新构建控件以支持日期格式。微软并没有考虑到所有事情，如果我们必须等待他们发布任何东西之前发生这种情况，现在我们可能很幸运地拥有.NET 1.0 beta版本。 :) - Steve Py
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