■ TreeView 클래스 : 드래그 & 드롭 사용하기

------------------------------------------------------------------------------------------------------------------------


TestProject.zip


MainForm.cs

 

 

using System;

using System.Drawing;

using System.Windows.Forms;

 

namespace TestProject

{

    /// <summary>

    /// 메인 폼

    /// </summary>

    public partial class MainForm : Form

    {

        //////////////////////////////////////////////////////////////////////////////////////////////////// Field

        ////////////////////////////////////////////////////////////////////////////////////////// Private

 

        #region Field

 

        /// <summary>

        /// 소스 노드

        /// </summary>

        private TreeNode sourceNode;

 

        #endregion

 

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

        ////////////////////////////////////////////////////////////////////////////////////////// Public

 

        #region 생성자 - MainForm()

 

        /// <summary>

        /// 생성자

        /// </summary>

        public MainForm()

        {

            InitializeComponent();

 

            #region 트리뷰를 설정한다.

 

            this.treeView.AllowDrop = true;

 

            #endregion

            #region 이벤트를 설정한다.

 

            Load                    += Form_Load;

            this.treeView.ItemDrag  += treeView_ItemDrag;

            this.treeView.DragEnter += treeView_DragEnter;

            this.treeView.DragDrop  += treeView_DragDrop;

 

            #endregion

        }

 

        #endregion

 

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method

        ////////////////////////////////////////////////////////////////////////////////////////// Private

 

        #region 폼 로드시 처리하기 - Form_Load(sender, e)

 

        /// <summary>

        /// 폼 로드시 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void Form_Load(object sender, EventArgs e)

        {

            TreeNode rootNode = null;

 

            for(int i = 0; i < 101; i++)

            {

                if(i % 10 == 0)

                {

                    if(rootNode != null)

                    {

                        this.treeView.Nodes.Add(rootNode);

                    }

 

                    rootNode = new TreeNode(i.ToString());

                }

                else

                {

                    TreeNode childNode = new TreeNode(i.ToString());

 

                    rootNode.Nodes.Add(childNode);

                }

            }

 

            this.treeView.ExpandAll();

        }

 

        #endregion

        #region 트리뷰 항목 DRAG 처리하기 - treeView_ItemDrag(sender, e)

 

        /// <summary>

        /// 트리뷰 항목 DRAG 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void treeView_ItemDrag(object sender, ItemDragEventArgs e)

        {

            this.sourceNode = e.Item as TreeNode;

 

            DoDragDrop(e.Item.ToString(), DragDropEffects.Move | DragDropEffects.Copy);

        }

 

        #endregion

        #region 트리뷰 DRAG ENTER 처리하기 - treeView_DragEnter(sender, e)

 

        /// <summary>

        /// 트리뷰 DRAG ENTER 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void treeView_DragEnter(object sender, DragEventArgs e)

        {

            if(e.Data.GetDataPresent(DataFormats.Text))          

            {

                e.Effect = DragDropEffects.Move;

            }

            else

            {

                e.Effect = DragDropEffects.None;

            }

        }

 

        #endregion

        #region 트리뷰 DRAG DROP 처리하기 - treeView_DragDrop(sender, e)

 

        /// <summary>

        /// 트리뷰 DRAG DROP 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void treeView_DragDrop(object sender, DragEventArgs e)

        {

            TreeView treeView = sender as TreeView;

 

            Point dropPoint = treeView.PointToClient(new Point(e.X, e.Y));

 

            TreeNode targetNode = this.treeView.GetNodeAt(dropPoint);

 

            TreeNode copyNode;

 

            if(targetNode != null)

            {

                copyNode = new TreeNode

                (

                    sourceNode.Text,

                    sourceNode.ImageIndex,

                    sourceNode.SelectedImageIndex

                );

 

                if(sourceNode.Index > targetNode.Index)

                {

                    targetNode.Parent.Nodes.Insert(targetNode.Index, copyNode);

                }

                else

                {

                    targetNode.Parent.Nodes.Insert(targetNode.Index + 1, copyNode);

                }

 

                this.sourceNode.Remove();

 

                this.treeView.Invalidate();

            }

        }

 

        #endregion

    }

}

 

------------------------------------------------------------------------------------------------------------------------

Posted by 사용자 icodebroker
TAG

댓글을 달아 주세요