C#ListView选中selectedItem上下移动

最新推荐文章于 2021-12-19 12:07:29 发布

转载最新推荐文章于 2021-12-19 12:07:29 发布 · 3.2k 阅读

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本文深入探讨了移动开发与前端开发中的关键操作技术，包括ListView元素上下移动的具体实现步骤，涉及代码逻辑与实际应用案例。通过实例解析，帮助开发者掌握高效管理列表视图元素的技巧。

//上移
private void ListViewUpMove(ListView listView)
        {
            if (listView.SelectedItems.Count == 0)
            {
                return;
            }
            listView.BeginUpdate();
            if (listView.SelectedItems[0].Index > 0)
            {
                foreach (ListViewItem lvi in listView.SelectedItems)
                {
                    ListViewItem lviSelectedItem = lvi;
                    int indexSelectedItem = lvi.Index;
                    listView.Items.RemoveAt(indexSelectedItem);
                    listView.Items.Insert(indexSelectedItem - 1, lviSelectedItem);
                }
            }
            listView.EndUpdate();
            if (listView.Items.Count > 0 && listView.SelectedItems.Count > 0)
            {
                listView.Focus();
                listView.SelectedItems[0].Focused = true;
                listView.SelectedItems[0].EnsureVisible();
            }
        }
=============================================================
//下移
        private void ListViewDownMove(ListView listView)
        {
            if (listView.SelectedItems.Count == 0)
            {
                return;
            }
            listView.BeginUpdate();
            int indexMaxSelectedItem = listView.SelectedItems[listView.SelectedItems.Count

- 1].Index;
            if (indexMaxSelectedItem < listView.Items.Count - 1)
            {
                for (int i = listView.SelectedItems.Count - 1; i >= 0; i--)
                {
                    ListViewItem lviSelectedItem = listView.SelectedItems[i];
                    int indexSelectedItem = lviSelectedItem.Index;
                    listView.Items.RemoveAt(indexSelectedItem);
                    listView.Items.Insert(indexSelectedItem + 1, lviSelectedItem);
                }
            }
            listView.EndUpdate();
            if (listView.Items.Count > 0 && listView.SelectedItems.Count > 0)
            {
                listView.Focus();
                listView.SelectedItems[listView.SelectedItems.Count - 1].Focused = true;
                listView.SelectedItems[listView.SelectedItems.Count - 1].EnsureVisible();
            }
        }