ListView中移动项目 [英] ListView moving items

问题描述

我还有一个问题，ListView控件:(现在我需要在组移动项目（上，下，到开始，到结束），但ListView控件是在最后总是显示移动的项目。

I have another problem with ListView :( Now I need to move items in group (up, down, to the beginning, to the end), but ListView is displaying moved items always at the end.

下面是示例code移动项目的开始：

Here is sample code for moving item to the beginning:

   if (1 == listView1.SelectedItems.Count)
    {

        ListViewItem item = listView1.SelectedItems[0];
        ListViewGroup gp = item.Group;

        int index;
        index = item.Index;

        if (index < listView1.Items.Count)
        {

            index = 0;

            listView1.Items.Remove(item);

            item.Group = gp;

            listView1.Items.Insert(index, item);
        }
    }

我试图谷歌找到了一些解决方案，我发现别人（<一个href=\"http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/838f90cd-33d8-4c81-9ed9-85220b511afe\" rel=\"nofollow\">http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/838f90cd-33d8-4c81-9ed9-85220b511afe)谁曾同样的问题和我一样，但他的解决方案是行不通的：（

I tried google to find some solution, and I found someone else (http://social.msdn.microsoft.com/Forums/en-US/winforms/thread/838f90cd-33d8-4c81-9ed9-85220b511afe) who had same problem like me, but his solution is not working :(

我考虑过使用ObjectListView，但我已经修改的ListView魔女现在支持拖放放大器;与Winamp的效果，onScroll事件，滚动同步下降等..和我不想失去这个东西:(

I considered using ObjectListView but I have modified ListView witch now supports drag & drop with WinAmp effect, onScroll events, scrolling synchronization etc.. and I don't want to lose this stuff :(

推荐答案

试试这个：

/// <summary>
/// Move the given item to the given index in the given group
/// </summary>
/// <remarks>The item and group must belong to the same ListView</remarks>
public void MoveToGroup(ListViewItem lvi, ListViewGroup group, int indexInGroup) {
    group.ListView.BeginUpdate();
    ListViewItem[] items = new ListViewItem[group.Items.Count + 1];
    group.Items.CopyTo(items, 0);
    Array.Copy(items, indexInGroup, items, indexInGroup + 1, group.Items.Count - indexInGroup);
    items[indexInGroup] = lvi;
    for (int i = 0; i < items.Length; i++)
        items[i].Group = null;
    for (int i = 0; i < items.Length; i++) 
        group.Items.Add(items[i]);
    group.ListView.EndUpdate();
}

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