绑定字符串格式给出不正确的结果

本文关键字：不正确 结果 字符串 格式 绑定 | 更新日期: 2023-09-27 18:35:07

出于某种原因，使用Content="{Binding Time, StringFormat=t}仍然给了我一个很长的日期。支持字段是用 DateTime.Now 初始化的 DateTime 属性，但无论我尝试哪种字符串格式，它仍然显示完整日期......

我只想看到 HH：mm tt

有什么想法吗？

XAML ： 

<Window x:Class="ArgosSystem.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:loc="clr-namespace:ArgosSystem"
        xmlns:sys="clr-namespace:System;assembly=System"
        Title="MainWindow" Height="800" Width="1280" Loaded="Window_Loaded">
    <Window.Resources>
        <DataTemplate DataType="{x:Type loc:Picknote}">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="200" MinWidth="200" />
                    <ColumnDefinition Width="350" />
                    <ColumnDefinition Width="250" />
                    <ColumnDefinition Width="50" />
                </Grid.ColumnDefinitions>
                <Label Content="{Binding Time, StringFormat=t}" VerticalContentAlignment="Center"  Foreground="IndianRed" FontSize="36" Grid.Column="0" />
                <Label Content="{Binding Customer}" VerticalContentAlignment="Center" Foreground="IndianRed" FontSize="36" Grid.Column="1" />
                <Label Content="{Binding PicknoteNo}"  VerticalContentAlignment="Center"  Foreground="IndianRed" FontSize="36" Grid.Column="2" />
                <Label Content="{Binding Qty}"  VerticalContentAlignment="Center"  Foreground="IndianRed" FontSize="36" Grid.Column="3" />
            </Grid>
        </DataTemplate>
    </Window.Resources>
    <Grid Background="Black">
        <DockPanel>
            <ScrollViewer Name="lstPicknoteScroll" VerticalScrollBarVisibility="Auto">
                <ItemsControl Name="lstPicknotes" ItemsSource="{Binding}"  IsTabStop="False" Foreground="Cornsilk" />
            </ScrollViewer>
        </DockPanel>
    </Grid>
</Window>

C# ：

public partial class MainWindow : Window
{
    ObservableCollection<Picknote> picknotes = new ObservableCollection<Picknote>();
    public MainWindow()
    {
        InitializeComponent();
        lstPicknotes.DataContext = picknotes;
    }
    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        picknotes.Add(new Picknote
        {
            Time = DateTime.Now,
            Customer = "REED FOR SPEED",
            PicknoteNo = "PKN767677",
            Qty = 100
        });
        picknotes.Add(new Picknote
        {
            Time = DateTime.Now.AddHours(-2),
            Customer = "F1 AUTOMOTIVE",
            PicknoteNo = "PKN767677",
            Qty = 50
        });
        picknotes.Add(new Picknote
        {
            Time = DateTime.Now.AddHours(-1),
            Customer = "FERGUSENS",
            PicknoteNo = "PKN767677",
            Qty = 10
        });
    }
}

绑定字符串格式给出不正确的结果

StringFormat 适用于字符串类型的属性。内容属性的类型为"对象"，因此需要使用"标签"控件的"内容字符串格式"属性指定格式。

<Label Content="{Binding Time}" ContentStringFormat="t" VerticalContentAlignment="Center"  Foreground="IndianRed" FontSize="36" Grid.Column="0" />
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