WPF数据网格中的日期格式
本文关键字:日期 格式 网格 数据 数据网 WPF | 更新日期: 2023-09-27 18:12:59
我要更改的是日期列的格式"DD/MM/YYYY HH:MM:SS";DD.MM.YYYY" .
<DataGrid Name="dgBuchung" AutoGenerateColumns="True"
ItemsSource="{Binding}" Grid.ColumnSpan="3" >
<ab:DataGridTextColumn Header="Fecha Entrada" Width="110"
Binding="{Binding date, StringFormat={}{0:dd/MM/yyyy}}" IsReadOnly="True" />
</DataGrid>
不幸的是,代码抛出了一个XMLParseException
。
首先,这种方式的解决方案是可能的,而使用AutoGenerateColumns?如果不是,我还能怎么处理呢?
如果是,上面的代码有什么问题?
不要忘记使用DataGrid。列,所有列都必须在该集合内。在我的项目中,我对日期的格式略有不同:
<tk:DataGrid>
<tk:DataGrid.Columns>
<tk:DataGridTextColumn Binding="{Binding StartDate, StringFormat='{0:dd.MM.yy HH:mm:ss'}}" />
</tk:DataGrid.Columns>
</tk:DataGrid>
使用AutoGenerateColumns,您将无法控制格式,因为DataGird将添加自己的列。
来得太晚了,但万一有人偶然发现这个页面…
可以通过在XAML中设置AutoGeneratingColumn处理程序来实现:
<DataGrid AutoGeneratingColumn="OnAutoGeneratingColumn" ..etc.. />
然后在后面的代码中这样做:
private void OnAutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
if (e.PropertyType == typeof(System.DateTime))
(e.Column as DataGridTextColumn).Binding.StringFormat = "dd/MM/yyyy";
}
如果你的绑定属性是DateTime,那么你所需要做的就是
Binding={Property, StringFormat=d}
Binding="{Binding YourColumn ,StringFormat='yyyy-MM-dd'}"
首先选择datagrid,然后转到属性找到Datagrid_AutoGeneratingColumn并双击然后使用这个代码
Datagrid_AutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
if (e.PropertyName == "Your column name")
(e.Column as DataGridTextColumn).Binding.StringFormat = "dd/MMMMMMMMM/yyyy";
if (e.PropertyName == "Your column name")
(e.Column as DataGridTextColumn).Binding.StringFormat = "dd/MMMMMMMMM/yyyy";
}
我试了一下,它可以在WPF上工作
我知道公认的答案是相当旧的,但是有一种方法来控制AutoGeneratColumns的格式:
首先创建一个函数,在生成列时触发:
<DataGrid x:Name="dataGrid" AutoGeneratedColumns="dataGrid_AutoGeneratedColumns" Margin="116,62,10,10"/>
然后检查所生成的列的类型是否为DateTime,并将其字符串格式更改为"d"以删除时间部分:
private void DataGrid_AutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
if(YourColumn == typeof(DateTime))
{
e.Column.ClipboardContentBinding.StringFormat = "d";
}
}
这是一个非常古老的问题,但我找到了一个新的解决方案,所以我写了下来。
首先,这种方式的解决方案是可能的,而使用AutoGenerateColumns?
是的,这可以用AttachedProperty来完成,如下所示。
<DataGrid AutoGenerateColumns="True"
local:DataGridOperation.DateTimeFormatAutoGenerate="yy-MM-dd"
ItemsSource="{Binding}" />
AttachedProperty
定义了两个AttachedProperty,允许您指定两种格式。DateTime
为DateTimeFormatAutoGenerate
, TimeSpan
为TimeSpanFormatAutoGenerate
。
class DataGridOperation
{
public static string GetDateTimeFormatAutoGenerate(DependencyObject obj) => (string)obj.GetValue(DateTimeFormatAutoGenerateProperty);
public static void SetDateTimeFormatAutoGenerate(DependencyObject obj, string value) => obj.SetValue(DateTimeFormatAutoGenerateProperty, value);
public static readonly DependencyProperty DateTimeFormatAutoGenerateProperty =
DependencyProperty.RegisterAttached("DateTimeFormatAutoGenerate", typeof(string), typeof(DataGridOperation),
new PropertyMetadata(null, (d, e) => AddEventHandlerOnGenerating<DateTime>(d, e)));
public static string GetTimeSpanFormatAutoGenerate(DependencyObject obj) => (string)obj.GetValue(TimeSpanFormatAutoGenerateProperty);
public static void SetTimeSpanFormatAutoGenerate(DependencyObject obj, string value) => obj.SetValue(TimeSpanFormatAutoGenerateProperty, value);
public static readonly DependencyProperty TimeSpanFormatAutoGenerateProperty =
DependencyProperty.RegisterAttached("TimeSpanFormatAutoGenerate", typeof(string), typeof(DataGridOperation),
new PropertyMetadata(null, (d, e) => AddEventHandlerOnGenerating<TimeSpan>(d, e)));
private static void AddEventHandlerOnGenerating<T>(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (!(d is DataGrid dGrid))
return;
if ((e.NewValue is string format))
dGrid.AutoGeneratingColumn += (o, e) => AddFormat_OnGenerating<T>(e, format);
}
private static void AddFormat_OnGenerating<T>(DataGridAutoGeneratingColumnEventArgs e, string format)
{
if (e.PropertyType == typeof(T))
(e.Column as DataGridTextColumn).Binding.StringFormat = format;
}
}
如何使用
<视图/h3><Window
x:Class="DataGridAutogenerateCustom.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:DataGridAutogenerateCustom"
Width="400" Height="250">
<Window.DataContext>
<local:MainWindowViewModel />
</Window.DataContext>
<StackPanel>
<TextBlock Text="DEFAULT FORMAT" />
<DataGrid ItemsSource="{Binding Dates}" />
<TextBlock Margin="0,30,0,0" Text="CUSTOM FORMAT" />
<DataGrid
local:DataGridOperation.DateTimeFormatAutoGenerate="yy-MM-dd"
local:DataGridOperation.TimeSpanFormatAutoGenerate="dd'-hh'-mm'-ss"
ItemsSource="{Binding Dates}" />
</StackPanel>
</Window>
ViewModel
public class MainWindowViewModel
{
public DatePairs[] Dates { get; } = new DatePairs[]
{
new (){StartDate= new (2011,1,1), EndDate= new (2011,2,1) },
new (){StartDate= new (2020,1,1), EndDate= new (2021,1,1) },
};
}
public class DatePairs
{
public DateTime StartDate { get; set; }
public DateTime EndDate { get; set; }
public TimeSpan Span => EndDate - StartDate;
}
<Window
x:Class="DataGridAutogenerateCustom.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:DataGridAutogenerateCustom"
Width="400" Height="250">
<Window.DataContext>
<local:MainWindowViewModel />
</Window.DataContext>
<StackPanel>
<TextBlock Text="DEFAULT FORMAT" />
<DataGrid ItemsSource="{Binding Dates}" />
<TextBlock Margin="0,30,0,0" Text="CUSTOM FORMAT" />
<DataGrid
local:DataGridOperation.DateTimeFormatAutoGenerate="yy-MM-dd"
local:DataGridOperation.TimeSpanFormatAutoGenerate="dd'-hh'-mm'-ss"
ItemsSource="{Binding Dates}" />
</StackPanel>
</Window>
public class MainWindowViewModel
{
public DatePairs[] Dates { get; } = new DatePairs[]
{
new (){StartDate= new (2011,1,1), EndDate= new (2011,2,1) },
new (){StartDate= new (2020,1,1), EndDate= new (2021,1,1) },
};
}
public class DatePairs
{
public DateTime StartDate { get; set; }
public DateTime EndDate { get; set; }
public TimeSpan Span => EndDate - StartDate;
}
demo_wpf_datagrid