WPF DataGrid中的单元格高亮显示 [英] Cell Highlighing in WPF DataGrid

问题描述

我正在使用以下方法突出显示我的数据网格代码隐藏中的单元格。但问题是，当我滚出视图时，突出显示的细胞会丢失并跳跃。我已将行和列虚拟化都设置为false。请帮忙。

I am using the below method to highlight cells from my code-behind for my data grid. But the problem is that when I scroll out of view, the highlighted cells are getting lost and are jumping around. I have set both row and column virtualization to false. please help.

public void ColourCell(int row, int column, Color color, bool HighlightFlag = true)
        {
            DataGridRow rowContainer = GetRow(row);

            if (rowContainer != null)
            {
                DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(rowContainer);
                // try to get the cell but it may possibly be virtualized but enable virtualizion is off
                DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
                // now try to bring into view and retreive the cell
                if (cell != null)
                {
                    if (HighlightFlag == false)
                        cell.Background = new SolidColorBrush(Colors.MediumPurple);
                    else
                    {
                        cell.Background = new SolidColorBrush(color);
                    }
                }
            }
        }

public DataGridRow GetRow(int index)
        {
            DataGridRow row = (DataGridRow)DataGridControl.ItemContainerGenerator.ContainerFromIndex(index);
            if (row == null)
            {
                row = (DataGridRow)DataGridControl.ItemContainerGenerator.ContainerFromIndex(index);
            }
            return row;
        }

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;
        }

推荐答案

XAML版本要好得多：

http://social.msdn.microsoft.com/Forums/en-US / wpf / thread / a5fd5413-f055-4b56-83af-6d6bdb1d6fe9 / [ ^ ]

The XAML version is much better:
http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/a5fd5413-f055-4b56-83af-6d6bdb1d6fe9/[^]

此代码可以帮助您。

This code will help you.

private void GetCell(DataGridRow row, DataGridColumn column)
{

    DependencyObject parent = row;

    Lable1:

    for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
    {
        var item = VisualTreeHelper.GetChild(parent, i);
        if (item is DataGridCellsPresenter)
        {
            DataGridCellsPresenter presenter = item as DataGridCellsPresenter;

            DataGridCell cell = presenter.ItemContainerGenerator.ContainerFromIndex(1) as DataGridCell;

            cell.Background = Brushes.Red;

            break;
        }
        else
        {
            parent = item;
            goto Lable1;
        }
    }
}

这篇关于WPF DataGrid中的单元格高亮显示的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！