ListView 拖拽实例

实例内容：
ListView之间单项数据拖拽；
ListView之间多项数据拖拽；
ListView之间多项数据双向拖拽；
ListView内部位置移动；
ListView内部值的交换。

部分代码：

        #region ListView之间单项数据拖拽
        private void listView4_ItemDrag(object sender, ItemDragEventArgs e)
        {
            listView4.DoDragDrop(e.Item, DragDropEffects.Move);
        }

        private void listView5_DragEnter(object sender, DragEventArgs e)
        {
            e.Effect = e.AllowedEffect;
        }

        private void listView5_DragDrop(object sender, DragEventArgs e)
        {
            ListViewItem draggedItem = (ListViewItem)e.Data.GetData(typeof(ListViewItem));
            listView5.Items.Insert(0,(ListViewItem)draggedItem.Clone());
        }
        #endregion

        #region ListView之间多项数据拖拽
        private void listView2_ItemDrag(object sender, ItemDragEventArgs e)
        {
            ListViewItem[] items = new ListViewItem[((ListView)(sender)).SelectedItems.Count];
            int i = 0;

            foreach (ListViewItem item in ((ListView)(sender)).SelectedItems)
            {
                items[i] = item;
                i++;
            }

            ((ListView)(sender)).DoDragDrop(new DataObject("System.Windows.Forms.ListViewItem()", items), DragDropEffects.Copy);
        }

        private void listView3_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent("System.Windows.Forms.ListViewItem()"))
            {
                e.Effect = DragDropEffects.Copy;
            }
            else
            {
                e.Effect = DragDropEffects.None;
            }
        }   

        private void listView3_DragDrop(object sender, DragEventArgs e)
        {
            ListViewItem[] items = (ListViewItem[])(e.Data.GetData("System.Windows.Forms.ListViewItem()"));
            int i = 0;

            foreach (ListViewItem item in items)
            {
                ListViewItem listItem = new ListViewItem(items[i].Text,item.ImageIndex);
                listItem.SubItems.Add(items[i].SubItems[1].Text);
                listItem.SubItems.Add(items[i].SubItems[2].Text);
                ((ListView)(sender)).Items.Add(listItem);
                try
                {
                    if (sender == listView3)
                    {
                       listView2.Items.Remove(listView2.SelectedItems[0]);                       
                    }
                }
                catch (Exception exc)
                {
                    MessageBox.Show(exc.Message);
                }
                
                i++;
            }
        }
        #endregion

        #region  ListView内部位置移动
        private void listView1_ItemDrag(object sender, ItemDragEventArgs e)
        {
            listView1.DoDragDrop(e.Item, DragDropEffects.Move);
        }

        private void listView1_DragEnter(object sender, DragEventArgs e)
        {
            e.Effect = e.AllowedEffect;
        }

        private void listView1_DragOver(object sender, DragEventArgs e)
        {
            Point targetPoint = listView1.PointToClient(new Point(e.X, e.Y));
            int targetIndex = listView1.InsertionMark.NearestIndex(targetPoint);

            if (targetIndex>-1)
            {
                Rectangle itemBounds = listView1.GetItemRect(targetIndex);
                if (targetPoint.X>itemBounds.Left+(itemBounds.Width/2))
                {
                    listView1.InsertionMark.AppearsAfterItem = true;
                }
                else
                {
                    listView1.InsertionMark.AppearsAfterItem = false;
                }
            }
            listView1.InsertionMark.Index = targetIndex;
        }

        private void listView1_DragLeave(object sender, EventArgs e)
        {
            listView1.InsertionMark.Index = -1;
        }

        private void listView1_DragDrop(object sender, DragEventArgs e)
        {
            int targetIndex = listView1.InsertionMark.Index;
            if (targetIndex==-1)
            {
                return;
            }

            if (listView1.InsertionMark.AppearsAfterItem)
            {
                targetIndex++;
            }

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

            listView1.Items.Insert(targetIndex,(ListViewItem)draggedItme.Clone());
            listView1.Items.Remove(draggedItme);
        }

        private class ListViewIndexComparer : System.Collections.IComparer
        {
            public int Compare(object x, object y)
            {
                return ((ListViewItem)x).Index - ((ListViewItem)y).Index;
            }
        }
        #endregion        

。。。。。。
下载：https://files.cnblogs.com/EasyData/ListViewDragTest.rar