
// 基本原理: // 1. 從下往上計算位置 // 2. 模仿Word中組織結構圖的特點 // 調用代碼: Tree < string > tree = new Tree< string >( null , " 董事會 " ); tree.Add( " 北京公司 " ); tree.Add( " 董事秘書室特殊機構 " ); tree.Add( " 上海公司 " ); tree.Childs[ 0 ].Add( " 總經理辦公室 " ); tree.Childs[ 0 ].Add( " 財務部 " ); tree.Childs[ 0 ].Add( " 銷售部 " ); tree.Childs[ 2 ].Add( " 上海銷售部 " ); Bitmap bmp = tree.DrawAsImage(); // 實現代碼: using System; using System.Collections.Generic; using System.Text; using System.Drawing; namespace Test { /// <summary> /// 用來輸出組織結構圖的類 /// </summary> /// <typeparam name="T"></typeparam> public class Tree<T> { Tree <T> _Parent = null ; T _Content; List <Tree<T>> _Childs = new List<Tree<T>> (); SizeF _Size; Rectangle _Rec; public Tree(Tree<T> parent, T content) { _Parent = parent; _Content = content; } public Tree<T> Add(T content) { Tree <T> tree = new Tree<T>( this , content); _Childs.Add(tree); return tree; } public Tree<T> Parent { get { return _Parent; } } public T Content { get { return _Content; } } public List<Tree<T>> Childs { get { return _Childs; } } public SizeF Size { get { return _Size; } set { _Size = value; } } public Rectangle Rec { get { return _Rec; } set { _Rec = value; } } void MeatureAllSize(Graphics g, Font font, int addWidth) { _Size = g.MeasureString(_Content.ToString(), font); _Size.Width += addWidth; foreach (Tree<T> tree in Childs) tree.MeatureAllSize(g, font, addWidth); } List <List<Tree<T>>> GetTreeLayers() { List <List<Tree<T>>> layers = new List<List<Tree<T>>> (); GetTreeLayers(layers, new List<Tree<T>>( new Tree<T>[] { this }), 0 ); return layers; } void GetTreeLayers(List<List<Tree<T>>> layers, List<Tree<T>> childs, int level) { if (childs.Count == 0 ) return ; if (layers.Count <= level) layers.Add( new List<Tree<T>> ()); for ( int i = 0 ; i < childs.Count; i++ ) { layers[level].Add(childs[i]); GetTreeLayers(layers, childs[i].Childs, level + 1 ); } } /// <summary> /// 設置顯示區域(從最后一層最左開始) /// </summary> /// <param name="level"></param> /// <param name="height"></param> /// <param name="interval"></param> /// <param name="left"></param> void SetRectangle( int level, int height, int hInterval, int vInterval, int left) { int index = 0 ; if (Parent != null ) index = Parent.Childs.IndexOf( this ); if (Childs.Count == 0 ) { // 沒有兒子,就向前靠 if (left > 0 ) left += hInterval; } else { // 有兒子,就在兒子中間 int centerX = (Childs[ 0 ].Rec.Left + Childs[Childs.Count - 1 ].Rec.Right) / 2 ; left = centerX - ( int )_Size.Width / 2 ; // 并且不能和前面的重復,如果重復,聯同子孫和子孫的右邊節點右移 if (Parent != null && index > 0 ) { int ex = (Parent.Childs[index - 1 ].Rec.Right + hInterval) - left; if (index > 0 && ex > 0 ) { for ( int i = index; i < Parent.Childs.Count; i++ ) Parent.Childs[i].RightChilds(ex); left += ex; } } } _Rec = new Rectangle(left, (height + vInterval) * level, ( int )_Size.Width, height); } /// <summary> /// 所有子孫向右平移 /// </summary> /// <param name="ex"></param> void RightChilds( int ex) { Rectangle rec; for ( int i = 0 ; i < _Childs.Count; i++ ) { rec = _Childs[i].Rec; rec.Offset(ex, 0 ); _Childs[i].Rec = rec; _Childs[i].RightChilds(ex); } } void Offset( int x, int y) { _Rec.Offset(x, y); for ( int i = 0 ; i < _Childs.Count; i++ ) _Childs[i].Offset(x, y); } public Bitmap DrawAsImage() { return DrawAsImage(Pens.Black, new Font( " 宋體 " , 10.5f ), 26 , 20 , 5 , 20 , 26 ); } public Bitmap DrawAsImage(Pen pen, Font font, int h, int horPadding, int horInterval, int verInterval, int borderWidth) { Bitmap bmp = new Bitmap( 1 , 1 ); Graphics g = Graphics.FromImage(bmp); // 把樹扁平化 List<List<Tree<T>>> layers = GetTreeLayers(); // 算出每個單元的大小 MeatureAllSize(g, font, horPadding); g.Dispose(); bmp.Dispose(); // 從最后一層開始排列 int left = 0 ; for ( int i = layers.Count - 1 ; i >= 0 ; i-- ) { for ( int j = 0 ; j < layers[i].Count; j++ ) { layers[i][j].SetRectangle(i, h, horInterval, verInterval, left); left = layers[i][j].Rec.Right; } } Offset(borderWidth, borderWidth); // 獲取畫布需要的大小 int maxHeight = (h + verInterval) * layers.Count - verInterval + borderWidth * 2 ; int maxWidth = 0 ; for ( int i = layers.Count - 1 ; i >= 0 ; i-- ) { for ( int j = 0 ; j < layers[i].Count; j++ ) { if (layers[i][j].Rec.Right > maxWidth) maxWidth = layers[i][j].Rec.Right; } } maxWidth += borderWidth; // 邊寬 // 畫 bmp = new Bitmap(maxWidth, maxHeight); g = Graphics.FromImage(bmp); g.Clear(Color.White); StringFormat format = (StringFormat)StringFormat.GenericDefault.Clone(); format.Alignment = StringAlignment.Center; format.LineAlignment = StringAlignment.Center; Rectangle rec, recParent; for ( int i = 0 ; i < layers.Count; i++ ) { for ( int j = 0 ; j < layers[i].Count; j++ ) { // 畫字 rec = (Rectangle)layers[i][j].Rec; g.DrawRectangle(pen, rec); g.DrawString(layers[i][j].Content.ToString(), font, new SolidBrush(pen.Color), rec, format); // 畫到父親的線 if (layers[i][j].Parent != null ) { recParent = layers[i][j].Parent.Rec; g.DrawLine(pen, rec.Left + rec.Width / 2 , rec.Top, rec.Left + rec.Width / 2 , rec.Top - verInterval / 2 ); g.DrawLine(pen, recParent.Left + recParent.Width / 2 , recParent.Bottom, recParent.Left + recParent.Width / 2 , rec.Top - verInterval / 2 ); g.DrawLine(pen, rec.Left + rec.Width / 2 , rec.Top - verInterval / 2 , recParent.Left + recParent.Width / 2 , rec.Top - verInterval / 2 ); } } } g.Flush(); g.Dispose(); return bmp; } } }
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