wpf listview拖动选择多个项目

在WPF中，ListView是一个常用的控件，用于显示和编辑项目的集合。通常情况下，我们可以通过鼠标点击来选择ListView中的项目，但有时候我们可能需要通过拖动来选择多个项目。本文将介绍如何在WPF中实现ListView的拖动选择多个项目，并提供一个案例代码来帮助读者更好地理解。

csharp
// XAML代码
          PreviewMouseLeftButtonUp="ListView_PreviewMouseLeftButtonUp"
          MouseMove="ListView_MouseMove">
    项目1
    项目2
    项目3
    项目4
    项目5
// C#代码
private bool isDragging = false;
private Point startPoint;
private ListViewItem clickedItem;
private void ListView_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
    startPoint = e.GetPosition(null);
    clickedItem = FindAncestor((DependencyObject)e.OriginalSource);
}
private void ListView_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
    if (isDragging)
    {
        isDragging = false;
    }
    else
    {
        // 处理单击事件
        clickedItem.IsSelected = !clickedItem.IsSelected;
    }
}
private void ListView_MouseMove(object sender, MouseEventArgs e)
{
    if (e.LeftButton == MouseButtonState.Pressed && !isDragging)
    {
        Point currentPosition = e.GetPosition(null);
        if (Math.Abs(currentPosition.X - startPoint.X) > SystemParameters.MinimumHorizontalDragDistance ||
            Math.Abs(currentPosition.Y - startPoint.Y) > SystemParameters.MinimumVerticalDragDistance)
        {
            isDragging = true;
            if (clickedItem != null)
            {
                clickedItem.IsSelected = true;
            }
        }
    }
}
private static T FindAncestor(DependencyObject current) where T : DependencyObject
{
    do
    {
        if (current is T)
        {
            return (T)current;
        }
        current = VisualTreeHelper.GetParent(current);
    }
    while (current != null);
    return null;
}