鼠标悬停事件时突出显示列表框项目

Question

当鼠标悬停在listview项目上时，我正在尝试更改其背景颜色

我有一个鼠标悬停事件，但我如何在鼠标悬停在项目上时添加“高亮”效果？

private void pinnedAppsListBox_MouseHover(object sender, EventArgs e)
{

}

Answer 1

使用以下命令：

private void pinnedAppsListBox_MouseHover(object sender, EventArgs e){

   Point point = pinnedAppsListBox.PointToClient(Cursor.Position);
   int index = pinnedAppsListBox.IndexFromPoint(point);
   if (index < 0) return;
   //Do any action with the item
   pinnedAppsListBox.GetItemRectangle(index).Inflate(1,2);
}

Answer 2

转到列表视图的ItemMouseHover事件并添加，然后设置项目的属性"BackColor“。

private void listView1_ItemMouseHover(object sender, ListViewItemMouseHoverEventArgs e)
{
            e.Item.BackColor = Color.Black;
}

Answer 3

声明此全局变量

使用此Listview项目变量可跟踪悬停在哪个项目上

ListViewItem lvHoveredItem;

设置以下函数以打开控件的DoubleBuffering，以防止闪烁：

public static void SetDoubleBuffering(System.Windows.Forms.Control control, bool value)
    {
        System.Reflection.PropertyInfo controlProperty = typeof(System.Windows.Forms.Control)
            .GetProperty("DoubleBuffered", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
        controlProperty.SetValue(control, value, null);
    }

在加载控件的位置调用此函数

SetDoubleBuffering(lvTaskList, true);

然后在listview的mousemove事件中使用以下代码

private void lvTaskList_MouseMove(object sender, MouseEventArgs e)
    {
        //Set the Color you want the list Item to be when mouse is over
        Color oItemColor = Color.Lavender;
        Color oOriginalColor = Color.blue; //Your original color


        //get the Item the Mouse is currently hover
        ListViewItem lvCurrentItem = lvTaskList.GetItemAt(e.X, e.Y);


        if ((lvCurrentItem != null) && (lvCurrentItem != lvHoveredItem))
        {
            lvCurrentItem.BackColor = oItemColor;

            if(lvHoveredItem != null)
            {
                lvHoveredItem.BackColor = oOriginalColor ;                    
            }

            lvHoveredItem = lvCurrentItem;
            return;

        }


        if (lvCurrentItem == null)
        {
            if (lvHoveredItem != null)
            {
                lvHoveredItem.BackColor = oOriginalColor; 
            }
        }

    }

您还可以添加MouseLeave事件

private void lvTaskList_MouseLeave(object sender, EventArgs e)
    {

        Color oOriginalColor = Color.Blue; //Your original color

        //When the mouse leave the control. If a ListViewItem was highlighted then set it's original color back
        if (lvHoveredItem != null)
        {
            lvHoveredItem.BackColor = oOriginalColor ;
        }

        lvHoveredItem = null;
    }