//基本原理：     // 1. 从下往上计算位置      // 2. 模仿Word中组织结构图的特点     //调用代码：     Tree<string> tree = new Tree<string>(null, "董事会");                   tree.Add("北京公司");                   tree.Add("董事秘书室特殊机构");                   tree.Add("上海公司");                     tree.Childs[0].Add("总经理办公室");                   tree.Childs[0].Add("财务部");                   tree.Childs[0].Add("销售部");                     tree.Childs[2].Add("上海销售部");                    Bitmap bmp = tree.DrawAsImage();     //实现代码：    using System;   using System.Collections.Generic;   using System.Text;   using System.Drawing;   namespace Test     {      /// <summary>      /// 用来输出组织结构图的类     /// </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>         /// 设置显示区域（从最后一层最左开始）          /// </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)              {                  // 没有儿子，就向前靠                  if (left > 0) left += hInterval;               }            else             {                  // 有儿子，就在儿子中间                  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复，如果重复，联同子孙和子孙的右边节点右移                 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>          /// 所有子孙向右平移          /// </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("宋体", 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);               // 把树扁平化              List<List<Tree<T>>> layers = GetTreeLayers();             // 算出每个单元的大小              MeatureAllSize(g, font, horPadding);               g.Dispose();              bmp.Dispose();               // 从最后一层开始排列             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);              // 获取画布需要的大小              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; // 边宽              // 画              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++)                   {                      // 画字                     rec = (Rectangle)layers[i][j].Rec;                      g.DrawRectangle(pen, rec);                      g.DrawString(layers[i][j].Content.ToString(), font, new SolidBrush(pen.Color),                          rec, format);                      // 画到父亲的线                     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;          }      }   }