对客户端树控件的包装

树控件在项目被经常使用，dtree.js这个脚本也被广泛使用，在服务端用起来有些不太方便，我写了以下一个类，是对dtree.js的包装。

using System;
  2  using System.Collections.Generic;
  3  using System.Linq;
  4  using System.Text;
  5 using System.Web.UI.WebControls;
  6 
  7 namespace Library.WebControls
  8 {
  9 publicclass Tree : Node
 10     {
 11 //仅有一个根结点
 12 privatestatic Node _rootNode =null;
 13 privateconstint _treePid =-1;
 14 privateconstint _id =0;
 15 privatereadonlystaticstring _openstream =@"a.openTo({0},true,false);";
 16 privatestring _keepopennodestream =string.Empty;
 17 
 18 public Node Root
 19         {
 20 get
 21             {
 22 return _rootNode;
 23             }
 24         }
 25 
 26 public Tree(string nodeText)
 27         {
 28             _rootNode =new Node(_id, _treePid, nodeText);
 29 //新建树节点时重新分配节点集
 30             Node._nodeList =new List<Node>();
 31 //树根
 32 base.Add(_rootNode);
 33         }
 34 
 35 ///<summary>
 36 /// 新建时默认打一个节点
 37 ///</summary>
 38 ///<param name="value"></param>
 39 publicvoid KeepOpenNode(int value)
 40         {
 41             _keepopennodestream =string.Format(_openstream, value);
 42         }
 43 
 44 ///<summary>
 45 /// 渲染树节构
 46 ///</summary>
 47 ///<returns></returns>
 48 publicnewstring Render()
 49         {
 50             StringBuilder sb =new StringBuilder();
 51             sb.Append("a = new dTree('a');");
 52             sb.Append("a.config.useCookies=true;");
 53 //递归渲染叶
 54             sb.Append(base.Render());
 55 if (!string.IsNullOrEmpty(_keepopennodestream))
 56             {
 57                 sb.Append(_keepopennodestream); 
 58             }
 59 return sb.ToString();
 60         }
 61 
 62     }
 63 
 64 publicclass Node
 65     {
 66         
 67 #region 内部量
 68 privateint _id;
 69 privateint _pid;
 70 privatestring _text;
 71 privatestring _url ="about:blank";
 72 privatestring _mouseovertip ="";
 73 privatestring _target ="";
 74 privatestring _nodestruct =@"a.add({0},{1},'{2}','{3}','{4}','{5}');";
 75 privatestring _writestream ="";
 76 ///<summary>
 77 /// 全树仅一个节点集
 78 ///</summary>
 79 internalstatic List<Node> _nodeList =null;
 80 #endregion
 81 
 82 #region 外部属性
 83 publicint Id
 84         {
 85 set
 86             {
 87                 _id = value;
 88             }
 89 get
 90             {
 91 return _id;
 92             }
 93         }
 94 
 95 publicint Pid
 96         {
 97 set
 98             {
 99                 _pid = value;
100             }
101 get
102             {
103 return _pid;
104             }
105         }
106 
107 publicstring Text
108         {
109 set
110             {
111                 _text = value;
112             }
113 get
114             {
115 if (string.IsNullOrEmpty(_text)) return"";
116 return _text;
117             }
118         }
119 
120 publicstring Url
121         {
122 set
123             {
124                 _url = value;
125             }
126 get
127             {
128 if (string.IsNullOrEmpty(_url)) return"about:blank";
129 return _url;
130             }
131         }
132 publicstring MouseOverTip
133         {
134 set
135             {
136                 _mouseovertip = value;
137             }
138 get
139             {
140 if (string.IsNullOrEmpty(_mouseovertip)) return"";
141 return _mouseovertip;
142             }
143         }
144 publicstring TarGet
145         {
146 set
147             {
148                 _target = value;
149             }
150 get
151             {
152 if (string.IsNullOrEmpty(_target)) return"";
153 return _target;
154             }
155         }
156 
157 internalint Count
158         {
159 get
160             {
161 return _nodeList.Count;
162             }
163         }
164 
165 #endregion
166 
167 #region 构造 Node()
168 public Node()
169         { }
170 
171 ///<summary>
172 /// 构造一个node点
173 ///</summary>
174 ///<param name="id">当前ID号</param>
175 ///<param name="pid">父ID号</param>
176 ///<param name="text">显示文本</param>
177 public Node(int id, int pid, string text)
178         {
179             _id = id;
180             _pid = pid;
181             _text = text;
182         }
183 ///<summary>
184 /// 构造一个node点
185 ///</summary>
186 ///<param name="id">当前ID号</param>
187 ///<param name="pid">父ID号</param>
188 ///<param name="text">显示文本</param>
189 ///<param name="url">连接地址</param>
190 public Node(int id, int pid, string text, string url)
191         {
192             _id = id;
193             _pid = pid;
194             _text = text;
195             _url = url;
196         }
197 ///<summary>
198 /// 构造一个node点
199 ///</summary>
200 ///<param name="id">当前ID号</param>
201 ///<param name="pid">父ID号</param>
202 ///<param name="text">显示文本</param>
203 ///<param name="url">连接地址</param>
204 ///<param name="mouseovertip">鼠标悬浮时显示</param>
205 ///<param name="target">框架名</param>
206 public Node(int id, int pid, string text, string url, string mouseovertip, string target)
207         {
208             _id = id;
209             _pid = pid;
210             _text = text;
211             _url = url;
212             _mouseovertip = mouseovertip;
213             _target = target;
214         }
215 ///<summary>
216 /// 构造一个node点
217 ///</summary>
218 ///<param name="id">当前ID号</param>
219 ///<param name="pid">父ID号</param>
220 ///<param name="text">显示文本</param>
221 ///<param name="url">连接地址</param>
222 ///<param name="target">框架名</param>
223 public Node(int id, int pid, string text, string url, string target)
224         {
225             _id = id;
226             _pid = pid;
227             _text = text;
228             _url = url;
229             _target = target;
230         }
231 
232 #endregion
233 
234 #region 外部方法
235 ///<summary>
236 /// 外部渲染方法
237 ///</summary>
238 ///<returns></returns>
239 internalstring Render()
240         {
241 returnthis.Render(this.Count -1);
242         }
243 
244 ///<summary>
245 /// 添加一个Node
246 ///</summary>
247 ///<param name="node"></param>
248 ///<returns></returns>
249 public Node Add(Node node)
250         {
251             _nodeList.Add(node);
252 return node;
253         }
254 #endregion
255 
256 privatestring Render(int count)
257         {
258 if (_nodeList[count].Pid ==-1)
259 returnstring.Format(_nodestruct, _id, _pid, _text, _url, _mouseovertip, _target);
260 else
261             {
262                 
263                 _writestream =string.Format(_nodestruct, _nodeList[count]._id, 
264                                             _nodeList[count]._pid, _nodeList[count]._text, 
265                                             _nodeList[count]._url, _nodeList[count]._mouseovertip, 
266                                             _nodeList[count]._target);
267 return _writestream = (_nodeList[count -1].Render(count -1) + _writestream);
268             }
269         }
270        
271     }
272 }

使用方法：

publicpartialclass DemoTree : System.Web.UI.Page
 2     {
 3 protected Tree tree =new Tree("测试树");
 4 protectedvoid Page_Load(object sender, EventArgs e)
 5         {
 6 this.InitScript();
 7         }
 8 protectedoverridevoid OnInit(EventArgs e)
 9         {
10             Node node = tree.Add(new Node(1, tree.Root.Id, "根1", "#"));
11             Node node2 = tree.Add(new Node(2, tree.Root.Id, "根2", "#"));
12             Node node3 = tree.Add(new Node(3, tree.Root.Id, "根3", "#"));
13 
14             Node nodelist = node.Add(new Node(4, node.Id, "叶1", "#"));
15             Node nodelist2 = node.Add(new Node(5, node.Id, "叶2", "#"));
16 
17             Node nodelist3 = node3.Add(new Node(6, node3.Id, "子叶1", "#"));
18             Node nodelist4 = node3.Add(new Node(7, node3.Id, "子叶2", "#"));
19             Node nodelist5 = node3.Add(new Node(8, node3.Id, "子叶3", "#"));
20 
21             Node nodelist6 = nodelist5.Add(new Node(9, nodelist5.Id, "子子叶1", "#"));
22 
23 base.OnInit(e);
24         }
25 
26 
27 
28 protectedvoid InitScript()
29         {
30             Type type = GetType();
31 if (ClientScript.IsStartupScriptRegistered(type, "TreeScript") ==false)
32             {
33 string strScript =@"<script language=javascript>"+ tree.Render() +"document.write(a);</script>";
34 
35                 ClientScript.RegisterStartupScript(type, "TreeScript", strScript);
36             }
37         }
38       
39     }
40