ListView内部值的交换移动

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支持LargeIcon、SmallIcon、Tile

#region ListView内部值的交换
        private void listView6_ItemDrag(object sender, ItemDragEventArgs e)
        {
            listView6.DoDragDrop(e.Item, DragDropEffects.Move);
        }

        private void listView6_DragEnter(object sender, DragEventArgs e)
        {
            e.Effect = e.AllowedEffect;
        }

        private void listView6_DragLeave(object sender, EventArgs e)
        {
            listView6.InsertionMark.Index = -1;
        }

        private void listView6_DragOver(object sender, DragEventArgs e)
        {
            Point targetPoint = listView6.PointToClient(new Point(e.X, e.Y));
            int targetIndex = listView6.InsertionMark.NearestIndex(targetPoint);

            if (targetIndex > -1)
            {
                Rectangle itemBounds = listView6.GetItemRect(targetIndex);
                if (targetPoint.X > itemBounds.Left + 10
                    && targetPoint.X < itemBounds.Left + itemBounds.Width - 20
                    && targetPoint.Y > itemBounds.Top + 10
                    && targetPoint.Y < itemBounds.Top + itemBounds.Height - 20)
                {
                    listView6.Items[targetIndex].BackColor = Color.Red;
                    //设置预期放置位置
                    listView6.InsertionMark.Index = targetIndex;
                }
                else
                {
                    foreach (ListViewItem item in listView6.Items)
                    {
                        item.BackColor = Color.White;
                    }
                }
            }
            else
            {
                foreach (ListViewItem item in listView6.Items)
                {
                    item.BackColor = Color.White;
                }
            }
        }

        private void listView6_DragDrop(object sender, DragEventArgs e)
        {
            int targetIndex = listView6.InsertionMark.Index;

if (targetIndex == -1) { return; }

ListViewItem draggedItme = (ListViewItem)e.Data.GetData(typeof(ListViewItem));

            string message = "是否要将“" + draggedItme.Text + "”移至“" + listView6.Items[targetIndex].Text + "”";
            if (MessageBox.Show(message, "警告", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning) == DialogResult.OK)
            {
                string temp = "";
                int imgIndex = 0;

                //更换图标
                imgIndex = listView6.Items[targetIndex].ImageIndex;
                listView6.Items[targetIndex].ImageIndex = draggedItme.ImageIndex;
                listView6.SelectedItems[0].ImageIndex = imgIndex;

                //更换子项值
                for (int i = 1; i < listView6.Items[targetIndex].SubItems.Count; i++)
                {
                    temp = listView6.Items[targetIndex].SubItems[i].Text;
                    listView6.Items[targetIndex].SubItems[i].Text = draggedItme.SubItems[i].Text;
                    listView6.SelectedItems[0].SubItems[i].Text = temp;
                }
            }

            //重置背景色
            foreach (ListViewItem item in listView6.Items)
            {
                if (item.Index % 2 == 0) { item.BackColor = System.Drawing.Color.PaleGreen; }
                else { item.BackColor = new Color(); }
            }
            listView6.InsertionMark.Index = -1;
        }
        #endregion