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[英]How Do I Assign Different Functions/ClickEvents To Buttons Inside A DatagridColumn In WPF?
[英]How do I databind DataGridColumn.SortDirection in WPF, using XAML?
这与数据绑定代码中的 DataGrid 列 header有关,但它提出了相反的问题:“我如何在 XAML 中执行此操作?”,而不是“我如何在代码中执行此操作?”
我构建了这个 MainWindow.xaml
<Window x:Class="MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="450" Width="800"
DataContext="{Binding RelativeSource={RelativeSource Self}}">
<Grid>
<DataGrid AutoGenerateColumns="False" CanUserSortColumns="True" Sorting="DataGrid_Sorting" Margin="5" ItemsSource="{Binding ItemsSource}">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Value}" SortDirection="{Binding SortDirection, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Window}}, Mode=TwoWay}" Header="Click Me" x:Name="column"/>
</DataGrid.Columns>
</DataGrid>
</Grid>
</Window>
和这个 MainWindow.xaml.cs
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Windows;
public partial class MainWindow : Window
{
private ListSortDirection? _sortDirection;
public ListSortDirection? SortDirection
{
get => _sortDirection;
set
{
// I expect this message box to appear, but it doesn't.
MessageBox.Show($"Setting sort direction to {value?.ToString() ?? "null"}");
_sortDirection = value;
}
}
public IEnumerable<object> ItemsSource { get; } = new[] { 1, 2, 3, 4, 5 }.Select(x => new { Value = x }).ToList();
public MainWindow() => InitializeComponent();
private void DataGrid_Sorting(object sender, System.Windows.Controls.DataGridSortingEventArgs e)
=> MessageBox.Show($"Sorting grid.\nColumn sort direction was {column.SortDirection?.ToString() ?? "null"}.");
}
DataGrid.ItemsSource
的绑定按预期工作,但我构建的绑定没有为DataGridColumn.SortDirection
工作。 单击列 header(“单击我”)时,我希望看到两个消息框,但只出现一个。
我可以把BindingOperations.SetBinding(column, DataGridColumn.SortDirectionProperty, new Binding(nameof(SortDirection)) { Source = this, Mode = BindingMode.TwoWay });
在构造函数中按预期设置绑定,但我一直认为绑定应该在 XAML 中构建,而不是在代码中构建。
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