WPF MVVM - DataGrid单元格单击，获取列标题

public ICommand CellClickCommand { get; private set; }

CellClickCommand = new RelayCommand<object>(HandleCellClick);

<DataGrid ItemsSource="{Binding YourData}"
          SelectedItem="{Binding SelectedItem}">
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="MouseLeftButtonUp">
            <i:InvokeCommandAction Command="{Binding CellClickCommand}"
                                   CommandParameter="{Binding SelectedItem}" />
        </i:EventTrigger>
    </i:Interaction.Triggers>
    <!-- DataGrid columns -->
</DataGrid>

private void HandleCellClick(object parameter)
{
    // 获取列标题
    var columnTitle = YourDataGrid.Columns
        .FirstOrDefault(c => c.GetCellContent(parameter as YourDataItem) == Keyboard.FocusedElement)
        ?.Header.ToString();
    // 处理逻辑
}