选定单元格/行时更改单元格/行文本颜色- DataGrid WPF

<DataGrid ItemsSource="{Binding YourData}" SelectedCellsChanged="DataGrid_SelectedCellsChanged">
</DataGrid>

private void DataGrid_SelectedCellsChanged(object sender, SelectedCellsChangedEventArgs e)
{
    foreach (DataGridCellInfo cellInfo in e.AddedCells)
    {
        // 获取选中单元格的行和列
        int rowIndex = cellInfo.ItemIndex;
        int columnIndex = cellInfo.Column.DisplayIndex;

        // 获取选中单元格的DataGridCell对象
        DataGridCell cell = GetCell(rowIndex, columnIndex);

        // 更改单元格的文本颜色
        cell.Foreground = Brushes.Red;
    }
}

private DataGridCell GetCell(int rowIndex, int columnIndex)
{
    DataGridRow row = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromIndex(rowIndex);
    if (row != null)
    {
        DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(row);
        if (presenter != null)
        {
            DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
            if (cell != null)
                return cell;
        }
    }
    return null;
}

private childItem GetVisualChild<childItem>(DependencyObject obj) where childItem : DependencyObject
{
    int count = VisualTreeHelper.GetChildrenCount(obj);
    for (int i = 0; i < count; i++)
    {
        DependencyObject child = VisualTreeHelper.GetChild(obj, i);
        if (child != null && child is childItem)
            return (childItem)child;
        else
        {
            childItem childOfChild = GetVisualChild<childItem>(child);
            if (childOfChild != null)
                return childOfChild;
        }
    }
    return null;
}