C＃ListView DragDrop重新排序无法正常工作

Question

我正在尝试实施DragDrop的{​​{1}}来重新排序我的列表。

列表不会按预期重新排序或移动项目。

代码

ListViewItems

Answer 1

最近我已经完成了这段代码试试这个。

private ListViewItem tempItem = null;
private void lvTables_MouseDown(object sender, MouseEventArgs e)
{
    if (e.Button == MouseButtons.Left)
    {
        Application.DoEvents();
        tempItem = lvTables.GetItemAt(e.X, e.Y);
        string sData = tempItem.Text + ":" + tempItem.Name;
        DragDropEffects effect = DoDragDrop(sData, DragDropEffects.Move);
        lvTables.Refresh();
    }       
}

private void lvTables_DragEnter(object sender, DragEventArgs e)
{

    if (e.Data.GetDataPresent(DataFormats.StringFormat))
        e.Effect = DragDropEffects.Move;
    else
        e.Effect = DragDropEffects.None;
}

private void lvTables_DragOver(object sender, DragEventArgs e)
{
    if (tempItem != null && lvTables.Items.Contains(tempItem))
    {
        Application.DoEvents();
        int iIndex = -1;
        try
        {
            Point p = lvTables.PointToClient(new Point(e.X, e.Y));
            iIndex = lvTables.GetItemAt(p.X, p.Y).Index;
        }
        catch
        { }
        if (iIndex > -1 && iIndex != tempItem.Index)
        {
            if (lvTables.Items.Contains(tempItem))
                lvTables.Items.Remove(tempItem);
            lvTables.Items.Insert(iIndex, tempItem);
            tempItem.Selected = true;
        }
    }
}

private void lvTables_MouseUp(object sender, MouseEventArgs e)
{
    if (tempItem != null)
    {
        lvTables.SelectedItems.Clear();
        tempItem.Selected = true;
        tempItem = null;
    }
}