更改WPF DataGrid中单元格的背景颜色

Question

我需要一个简单的code snippet来更改WPF DataGrid cell的背景颜色。我有column index和row index。我想更改CellEditEnding event hadler内的颜色。我写了event handler。现在我需要简单的code snippet来更改background color的{​​{1}}。

Answer 1

如下所示，您可以更改特定的单元格背景，而无需使用选定的...

using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Media;

namespace SelectDataGridCell
{
	public partial class MainWindow : Window
	{
		public MainWindow()
		{
			this.InitializeComponent();
		}

		private void Button_Click(object sender, System.Windows.RoutedEventArgs e)
		{
			DataGridCell cell = GetCell(1, 1, myDataGrid);
            		cell.Background = new SolidColorBrush(Colors.Red);
		}

        public DataGridCell GetCell(int rowIndex, int columnIndex, DataGrid dg)
        {
            DataGridRow row = dg.ItemContainerGenerator.ContainerFromIndex(rowIndex) as DataGridRow;
            DataGridCellsPresenter p = GetVisualChild<DataGridCellsPresenter>(row);
            DataGridCell cell = p.ItemContainerGenerator.ContainerFromIndex(columnIndex) as DataGridCell;
            return cell;
        }

        static T GetVisualChild<T>(Visual parent) where T : Visual
        {
            T child = default(T);
            int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
            for (int i = 0; i < numVisuals; i++)
            {
                Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
                child = v as T;
                if (child == null)
                {
                    child = GetVisualChild<T>(v);
                }
                if (child != null)
                {
                    break;
                }
            }
            return child;
        } 
	}
}

<Window
	xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
	xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
	x:Class="SelectDataGridCell.MainWindow"
	x:Name="Window"
	Title="MainWindow"
	Width="640" Height="480">

	<Grid x:Name="LayoutRoot" DataContext="{Binding Source={StaticResource SampleDataSource}}">
		<DataGrid x:Name="myDataGrid" Margin="0,0,244,205" AutoGenerateColumns="False" ItemsSource="{Binding Collection}">
			<DataGrid.Columns>
				<DataGridTextColumn Binding="{Binding Property1}" Header="Property1"/>
				<DataGridCheckBoxColumn Binding="{Binding Property2}" Header="Property2"/>
			</DataGrid.Columns>
		</DataGrid>
		<Button Content="Button" HorizontalAlignment="Left" VerticalAlignment="Bottom" Width="75" Margin="8,0,0,146.04" Click="Button_Click"/>
	</Grid>
</Window>