/// <summary>
/// 当拖动某项时触发
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void listView1_ItemDrag(object sender, ItemDragEventArgs e)
{
Dictionary <ListViewItemEx, int> itemsCopy = new Dictionary <ListViewItemEx, int>();
foreach (ListViewItemEx item in LvDataContent.SelectedItems)
{
itemsCopy.Add(item, item.Index);
}
LvDataContent.DoDragDrop(itemsCopy, DragDropEffects.Move);
}
/// <summary>
/// 拖动时拖着某项置于某行上方时
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void listView1_DragOver(object sender, DragEventArgs e)
{
// 获得鼠标坐标
Point point = LvDataContent.PointToClient(new Point(e.X, e.Y));
// 返回离鼠标最近的项目的索引
int index = LvDataContent.InsertionMark.NearestIndex(point);
// 确定光标不在拖拽项目上
if (index > -1)
{
Rectangle itemBounds = LvDataContent.GetItemRect(index);
if (point.X > itemBounds.Left + (itemBounds.Width / 2))
{
LvDataContent.InsertionMark.AppearsAfterItem = true;
}
else
{
LvDataContent.InsertionMark.AppearsAfterItem = false;
}
}
LvDataContent.InsertionMark.Index = index;
}