关于 .net：在鼠标移动时突出显示 WPF DataGrid 上的列

Highlighting columns on a WPF DataGrid as mouse moves

我希望在鼠标移动时突出显示 WPF 数据网格上的列。我面临的一些问题是：

获取列的坐标以测试鼠标何时悬停在列上
更改列的背景颜色

任何帮助将不胜感激。

如何更新 DataGridCell 的样式并在其中定义一个 "IsMouseOver" 触发器？像这样：

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编辑：

以下是一个解决方案：1) 突出显示当前悬停的单元格，2) 突出显示整行，以及 3) 突出显示整个列。我只是快速编写了代码，还没有对其进行彻底测试，因此您可能会遇到一些问题。但无论如何，这应该让您了解如何完成它们。

我突出显示整个列的解决方案涉及使用两个附加属性，当鼠标悬停在 DataGridCell 上时，这些属性被分配给 DataGridCell。只需检查一下，看看它是否适合您。

XAML:

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DataGridBehavior 类：

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Interactivity;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Controls.Primitives;

namespace StackOverflow
{
public class DataGridBehavior : DependencyObject
{

public static bool GetHighlightColumn(DependencyObject obj)
{
return (bool)obj.GetValue(HighlightColumnProperty);
}

public static void SetHighlightColumn(DependencyObject obj, bool value)
{
obj.SetValue(HighlightColumnProperty, value);
}

// Using a DependencyProperty as the backing store for HighlightColumn. This enables animation, styling, binding, etc...
public static readonly DependencyProperty HighlightColumnProperty =
DependencyProperty.RegisterAttached("HighlightColumn", typeof(bool),
typeof(DataGridBehavior), new FrameworkPropertyMetadata(false, OnHighlightColumnPropertyChanged));

public static bool GetIsCellHighlighted(DependencyObject obj)
{
return (bool)obj.GetValue(IsCellHighlightedProperty);
}

public static void SetIsCellHighlighted(DependencyObject obj, bool value)
{
obj.SetValue(IsCellHighlightedProperty, value);
}

// Using a DependencyProperty as the backing store for IsCellHighlighted. This enables animation, styling, binding, etc...
public static readonly DependencyProperty IsCellHighlightedProperty =
DependencyProperty.RegisterAttached("IsCellHighlighted", typeof(bool), typeof(DataGridBehavior),
new UIPropertyMetadata(false));

private static void OnHighlightColumnPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
Console.WriteLine(e.NewValue);
DataGridCell cell = sender as DataGridCell;

if (cell != null)
{
DataGrid dg = GetDataGridFromCell(cell);
DataGridColumn column = cell.Column;

for (int i = 0; i < dg.Items.Count; i++)
{
DataGridRow row = dg.ItemContainerGenerator.ContainerFromIndex(i) as DataGridRow;
DataGridCell currentCell = GetCell(row, column);
if (currentCell != null)
{
currentCell.SetValue(DataGridBehavior.IsCellHighlightedProperty, e.NewValue);
}
}

}
}

private static DataGrid GetDataGridFromCell(DataGridCell cell)
{
DataGrid retVal = null;
FrameworkElement fe = cell;
while ((retVal == null) && (fe != null))
{
if (fe is DataGrid)
retVal = fe as DataGrid;
else
fe = VisualTreeHelper.GetParent(fe) as FrameworkElement;
}
return retVal;
}

private static DataGridCell GetCell(DataGridRow row, DataGridColumn column)
{
DataGridCell retVal = null;
DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(row);
if (presenter != null)
{
for (int i = 0; i < presenter.Items.Count; i++)
{
DataGridCell cell = presenter.ItemContainerGenerator.ContainerFromIndex(i) as DataGridCell;
if ((cell != null) && (cell.Column == column))
{
retVal = cell;
break;
}
}
}

return retVal;
}

private 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;
}
}
}