小弟我在前面写的两篇文章里面，源码都只是用JS模拟了AJAX，实在没有象样的东西，在此表示歉意。
昨天写了个简单的模拟Windows文件夹的AJAX无限级菜单树，希望下载后对大家有点用处。
开发环境：VS2005、C#、.net2.0、AJAX引擎是自己写的，没有用到AJAX的DLL。
运行环境：IE
小弟我在前面写的两篇文章里面，源码都只是用JS模拟了AJAX，实在没有象样的东西，在此表示歉意。
昨天写了个简单的模拟Windows文件夹的AJAX无限级菜单树，希望下载后对大家有点用处。
开发环境：VS2005、C#、.net2.0、Access、AJAX引擎是自己写的，没有用到AJAX的DLL。
运行环境：IE
具体的功能与界面如下：
初始菜单：
展开文件夹：
新建同级：
新建子级：
修改：
删除：
tree.htm
1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2 <html xmlns="http://www.w3.org/1999/xhtml" >
3 <head>
4 <meta http-equiv="Content-Type" content="text/html; charset=GB2312" />
5 <title>无限级联极菜单树</title>
6 <script language="javascript" type="text/javascript" src="js/Ajax.js"></script>
7 <script language="javascript" type="text/javascript">
8 <!--
9 function window.onload()
10 {
11 getdata("tree.aspx?mode=getTree&fatherID=0","divAjax");
12 }
13 -->
14 </script>
15 </head>
16 <body>
17 <div id='divAjax'></div>
18 <div id="contextmenu" style="text-align:center;border:1px solid #666666;background:#eeeeee;width:60px;padding:5px;display:none;position:absolute"></div>
19 </body>
20 </html>
21
Ajax.js
1 function $(id)
2 {
3 return document.getElementById(id);
4 }
5 function echo(obj,html)
6 {
7 $(obj).innerHTML=html;
8 }
9 function createxmlhttp()
10 {
11 var xmlhttp = false;
12 try
13 {
14 xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
15 }
16 catch (e)
17 {
18 try
19 {
20 xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
21 }
22 catch (e)
23 {
24 xmlhttp = false;
25 }
26 }
27 if (!xmlhttp && typeof XMLHttpRequest!='undefined')
28 {
29 xmlhttp = new XMLHttpRequest();
30 if (xmlhttp.overrideMimeType)
31 {
32 //设置MiME类别
33 xmlhttp.overrideMimeType('text/xml');
34 }
35 }
36 return xmlhttp;
37 }
38 //向服务器获取数据
39 function getdata(url,obj,initJS)
40 {
41 var xmlhttp = createxmlhttp();
42 xmlhttp.onreadystatechange=requestdata;
43 xmlhttp.open("GET",url,true);
44 xmlhttp.setRequestHeader("If-Modified-Since","0");
45 xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
46 xmlhttp.send(null);
47 function requestdata()
48 {
49 echo(obj,"<IMG SRC='Images/loading.gif' /> <span style=' font-size:12px; color:Black;'>loading
..</span><br>");
50 if(xmlhttp.readyState==4)
51 {
52 if(xmlhttp.status==200)
53 {
54 echo(obj,xmlhttp.responseText);
55 if(initJS != null)
56 {
57 getInitJS(initJS);
58 }
59 }
60 }
61 }
62 }
63 //向服务器发送数据
64 function postdata(url,obj,data)
65 {
66 var xmlhttp= createxmlhttp();
67 xmlhttp.onreadystatechange=requestdata;
68 xmlhttp.open("POST", url, true);
69 xmlhttp.setRequestHeader("If-Modified-Since","0");
70 xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
71 xmlhttp.send(data);
72 function requestdata()
73 {
74 echo(obj,"<IMG SRC='Images/loading.gif' /> <span style=' font-size:12px; color:Black;'>loading..</span><br>");
75 if(xmlhttp.readyState==4)
76 {
77 if(xmlhttp.status==200)
78 {
79 if(!postInitJS(xmlhttp.responseText))
80 {
81 echo(obj,xmlhttp.responseText);
82 }
83 }
84 }
85 }
86 }
87
88 function ShowSub(id,flag)
89 {
90 if(flag=="1")
91 {
92 eval("sub" + id).style.display='';
93 document.images["AddImg" + id].src='Images/subImg.bmp';
94 return;
95 }
96 if(flag=="0")
97 {
98 eval("sub" + id).style.display='none';
99 document.images["AddImg" + id].src='Images/addImg.bmp';
100 return;
101 }
102 if(eval("sub" + id).style.display=='none')
103 {
104 eval("sub" + id).style.display='';
105 document.images["AddImg" + id].src='Images/subImg.bmp';
106 return;
107 }
108 else
109 {
110 eval("sub" + id).style.display='none';
111 document.images["AddImg" + id].src='Images/addImg.bmp';
112 return;
113 }
114 }
115
116 function showMenu(id,fatherID)
117 {
118 contextmenu.style.posLeft = document.body.scrollLeft + event.x + 10 ;
119 contextmenu.style.posTop = document.body.scrollTop + event.y + 10;
120 var menuHtml = "";
121 menuHtml = menuHtml + "<span style='cursor:hand;font-size:12px; color:Black;' onmousemove=this.style.backgroundColor='#00cccc'; onmouseout=this.style.backgroundColor=''; onclick=getdata('tree.aspx?mode=getAdd&fatherID=" + fatherID + "','add" + fatherID + "','addFocus" + fatherID + "');closeMenu(); >添加同级</span><br />";
122 menuHtml = menuHtml + "<span style='cursor:hand;font-size:12px; color:Black;' onmousemove=this.style.backgroundColor='#00cccc'; onmouseout=this.style.backgroundColor=''; onclick=getdata('tree.aspx?mode=addSub&id=" + id + "','addSub" + id + "','getTree" + id + "');closeMenu(); >添加子级</span><br />";
123 menuHtml = menuHtml + "<span style='cursor:hand;font-size:12px; color:Black;' onmousemove=this.style.backgroundColor='#00cccc'; onmouseout=this.style.backgroundColor=''; onclick=getdata('tree.aspx?mode=getEdit&id=" + id + "','edit" + id + "','editFocus" + id + "');closeMenu(); >修 改</span><br />";
124 menuHtml = menuHtml + "<span style='cursor:hand;font-size:12px; color:Black;' onmousemove=this.style.backgroundColor='#00cccc'; onmouseout=this.style.backgroundColor=''; onclick=closeMenu();if(confirm('你确定要删除此菜单吗？')){postdata('tree.aspx?mode=del&id=" + id + "&fatherID=" + fatherID + "','edit" + id + "');} >删 除</span>";
125 document.getElementById('contextmenu').innerHTML = menuHtml ;
126 contextmenu.style.display = "" ;
127 }
128
129 function closeMenu()
130 {
131 contextmenu.style.display="none";
132 }
133
134 document.oncontextmenu=function()
135 {
136 return false;
137 }
138
139 document.onclick=function()
140 {
141 if(document.activeElement!=contextmenu)
142 {
143 closeMenu();
144 }
145 }
146 function getInitJS(JS)
147 {
148 if(JS.substr(0,6)=='addSub')
149 {
150 id=JS.substr(6,JS.length);
151 getdata('tree.aspx?mode=getAdd&fatherID=' + id,'add' + id,'addFocus' + id);
152 }
153 if(JS.substr(0,8)=='addFocus')
154 {
155 id=JS.substr(8,JS.length);
156 $('addName'+id).select();
157 }
158 if(JS.substr(0,9)=='editFocus')
159 {
160 id=JS.substr(9,JS.length);
161 $('editName'+id).select();
162 }
163 if(JS.substr(0,7)=='getTree')
164 {
165 id=JS.substr(7,JS.length);
166 getdata('tree.aspx?mode=getTree&fatherID=' + id,'sub' + id,'addSub' + id);
167 ShowSub(id,'1');
168 }
169 }
170 function postInitJS(JS)
171 {
172 if(JS.substr(0,5)=='added')
173 {
174 id=JS.substr(5,JS.length);
175 if(id=="0")
176 {
177 getdata("tree.aspx?mode=getTree&fatherID=0","divAjax");
178 }
179 else
180 {
181 getdata("tree.aspx?mode=getTree&fatherID=" + id,"sub" + id );
182 }
183 return true;
184 }
185 if(JS.substr(0,6)=='edited')
186 {
187 id=JS.substr(6,JS.length);
188 getdata('tree.aspx?mode=returnEdit&id=' + id,'edit' + id );
189 return true;
190 }
191 if(JS.substr(0,10)=='addNameRep')
192 {
193 id=JS.substr(10,JS.length);
194 alert('此菜单名已经存在');
195 getdata('tree.aspx?mode=getAdd&fatherID=' + id ,'add' + id ,'addFocus' + id);
196 return true;
197 }
198 if(JS.substr(0,11)=='editNameRep')
199 {
200 id=JS.substr(11,JS.length);
201 alert('此菜单名已经存在');
202 getdata('tree.aspx?mode=getEdit&id=' + id ,'edit' + id ,'editFocus' + id);
203 return true;
204 }
205 if(JS.substr(0,10)=='deletError')
206 {
207 id=JS.substr(10,JS.length);
208 alert('请先删除此菜单的子级项');
209 if(id=="0")
210 {
211 getdata("tree.aspx?mode=getTree&fatherID=0","divAjax");
212 }
213 else
214 {
215 getdata("tree.aspx?mode=getTree&fatherID=" + id,"sub" + id );
216 }
217 return true;
218 }
219 if(JS.substr(0,7)=='deleted')
220 {
221 id=JS.substr(7,JS.length);
222 if(id=="0")
223 {
224 getdata("tree.aspx?mode=getTree&fatherID=0","divAjax");
225 }
226 else
227 {
228 getdata("tree.aspx?mode=getTree&fatherID=" + id,"sub" + id );
229 }
230 return true;
231 }
232 return false;
233 }
234
235 function postAdd(id)
236 {
237 if($('addName'+id).value=='')
238 {
239 alert('菜单名字不能为空！');
240 $('addName'+id).focus();
241 return false;
242 }
243 data="Name="+($('addName'+id).value);
244 postdata('tree.aspx?mode=saveAdd&fatherID=' + id ,'add' + id,data);
245 }
246
247 function postEdit(id)
248 {
249 if($('editName'+id).value=='')
250 {
251 alert('菜单名字不能为空！');
252 $('editName'+id).focus();
253 return false;
254 }
255 data="Name="+($('editName'+id).value);
256 postdata('tree.aspx?mode=saveEdit&id=' + id ,'edit' + id,data);
257 }
258
tree.aspx
1 <%@ import namespace="System" %>
2 <%@ import namespace="System.Data" %>
3 <%@ import namespace="System.Configuration" %>
4 <%@ import namespace="System.Collections" %>
5 <%@ import namespace="System.Configuration" %>
6 <%@ import namespace="System.Web" %>
7 <%@ import namespace="System.Web.Security" %>
8 <%@ import namespace="System.Web.UI" %>
9 <%@ import namespace="System.Web" %>
10 <%@ import namespace="System.Web.UI.WebControls" %>
11 <%@ import namespace="System.Web.UI.WebControls.WebParts" %>
12 <%@ import namespace="System.Web.UI.HtmlControls" %>
13 <%@ import namespace="System.Data.OleDb" %>
14 <%@ Page Language="C#" %>
15
16 <script runat="server">
17 //Webconfig文件中获取数据库路径
18 public string g_StrConn = ConfigurationManager.AppSettings["Conn_Access"];
19 protected void Page_Load(object sender, EventArgs e)
20 {
21 string mode = Request.QueryString["mode"];
22 switch (mode)
23 {
24 case "getTree":
25 Response.Write(getTree());
26 break;
27 case "getAdd":
28 Response.Write(getAdd());
29 break;
30 case "saveAdd":
31 Response.Write(saveAdd());
32 break;
33 case "getEdit":
34 Response.Write(getEdit());
35 break;
36 case "saveEdit":
37 Response.Write(saveEdit());
38 break;
39 case "addSub":
40 Response.Write(addSub());
41 break;
42 case "del":
43 Response.Write(del());
44 break;
45 case "returnEdit":
46 Response.Write(returnEdit());
47 break;
48 }
49 }
50
51 //******************
52 //** 获取树结构 **
53 //******************
54 public string getTree()
55 {
56 string fatherID = Request.QueryString["fatherID"];
57 if (!IsNumber(fatherID))
58 {
59 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
60 }
61 string StrSql = "Select * From tree Where FatherID=" + fatherID + " Order By Name Asc";
62 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
63 OleDbCommand MyCmd = new OleDbCommand(StrSql, MyConn);
64 try
65 {
66 MyCmd.Connection.Open();
67 OleDbDataReader Dr = MyCmd.ExecuteReader();
68 string TopStr = "<a id='add" + fatherID + "'></a><table border='0' cellpadding='0' cellspacing='0' style='width: 100%; height: 10px'>";
69 string BottomStr = "</table>";
70 string MiddleStr = "";
71 while (Dr.Read())
72 {
73 MiddleStr = MiddleStr + "<tr><td align='left' valign='middle' style='width:200px;height:22px;' colspan='2'><span id='addSub" + Dr["ID"].ToString() + "'>";
74 string StrSql2 = "Select * From tree Where FatherID=" + Dr["ID"].ToString();
75 OleDbConnection MyConn2 = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
76 OleDbCommand MyCmd2 = new OleDbCommand(StrSql2, MyConn2);
77 try
78 {
79 MyCmd2.Connection.Open();
80 OleDbDataReader Dr2 = MyCmd2.ExecuteReader();
81 if (Dr2.Read())
82 {
83 MiddleStr = MiddleStr + "<img alt='' id='AddImg" + Dr["ID"].ToString() + "' src='Images/addImg.bmp' onclick=getdata('tree.aspx?mode=getTree&fatherID=" + Dr["ID"].ToString() + "','sub" + Dr["id"].ToString() + "');ShowSub(" + Dr["id"].ToString() + "); /> <img alt='' src='Images/folder.bmp' /> <a id='edit" + Dr["ID"].ToString() + "'><span style='cursor:hand;font-size:12px; color:Black;' oncontextmenu=showMenu(" + Dr["ID"].ToString() + "," + fatherID + "); onclick=alert('" + Dr["Name"].ToString() + "'); >" + Dr["Name"].ToString() + "</span></a>";
84 }
85 else
86 {
87 MiddleStr = MiddleStr + "<span style='font-size:11px; color:Black;'> </span><img alt='' src='Images/folder.bmp' /> <a id='edit" + Dr["ID"].ToString() + "'><span style='cursor:hand;font-size:12px; color:Black;' oncontextmenu=showMenu(" + Dr["ID"].ToString() + "," + fatherID + "); onclick=alert('" + Dr["Name"].ToString() + "');>" + Dr["Name"].ToString() + "</span></a>";
88 }
89 MyCmd2.Connection.Close();
90 }
91 catch
92 {
93 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
94 }
95 MiddleStr = MiddleStr + "</span></td></tr><tr><td align='left' valign='middle' style='width:22px;'></td><td align='left' valign='middle' ><div style='display:none;' id='sub" + Dr["id"].ToString() + "'></div></td></tr>";
96 }
97 MyCmd.Connection.Close();
98 return TopStr + MiddleStr + BottomStr;
99 }
100 catch
101 {
102 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
103 }
104 }
105
106 //************************
107 //** 获取节点新增表单 **
108 //************************
109 public string getAdd()
110 {
111 string addHtml = "";
112 string fatherID = Request.QueryString["fatherID"];
113 if (!IsNumber(fatherID))
114 {
115 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
116 }
117 addHtml = addHtml + "<span style='font-size:11px; color:Black;'> </span><img alt='' src='Images/folder.bmp' /> <input onblur=postAdd(" + fatherID + ") name='addName" + fatherID + "' type='text' value='新建菜单项' size='15'><br />";
118 return addHtml;
119 }
120
121 //**********************
122 //** 保存新增的节点 **
123 //**********************
124 public string saveAdd()
125 {
126 string id = Request.QueryString["id"];
127 string Name = Request["Name"];
128 if (Name.CompareTo("") == 0)
129 {
130 return "nameNull";
131 }
132 string fatherID = Request["fatherID"];
133 if (!IsNumber(fatherID))
134 {
135 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
136 }
137 if (!checkName(Name,""))
138 {
139 return "addNameRep" + fatherID;
140 }
141 string StrSql = "Select * From tree";
142 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
143 try
144 {
145 MyConn.Open();
146 OleDbDataAdapter odAdapt = new OleDbDataAdapter(StrSql, MyConn);
147 OleDbCommandBuilder oCB = new OleDbCommandBuilder(odAdapt);
148 DataSet DS = new DataSet();
149 odAdapt.Fill(DS);
150 DataRow DR = DS.Tables[0].NewRow();
151 DR["name"] = Name;
152 DR["fatherID"] = fatherID;
153 DS.Tables[0].Rows.Add(DR);
154 odAdapt.Update(DS);
155 MyConn.Close();
156 return "added" + fatherID;
157 }
158 catch
159 {
160 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
161 }
162 }
163
164 //********************
165 //** 新增子级节点 **
166 //********************
167 public string addSub()
168 {
169 string changeHtml = "";
170 string id = Request.QueryString["id"];
171 if (!IsNumber(id))
172 {
173 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
174 }
175 string StrSql = "Select * From tree Where id=" + id;
176 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
177 try
178 {
179 MyConn.Open();
180 OleDbDataAdapter odAdapt = new OleDbDataAdapter(StrSql, MyConn);
181 DataSet DS = new DataSet();
182 odAdapt.Fill(DS);
183 DataTable DT = DS.Tables[0];
184 changeHtml = changeHtml + "<img alt='' id='AddImg" + DT.Rows[0]["ID"].ToString() + "' src='Images/addImg.bmp' onclick=getdata('tree.aspx?mode=getTree&fatherID=" + DT.Rows[0]["ID"].ToString() + "','sub" + DT.Rows[0]["ID"].ToString() + "');ShowSub(" + DT.Rows[0]["ID"].ToString() + "); /> <img alt='' src='Images/folder.bmp' /> <a id='edit" + DT.Rows[0]["ID"].ToString() + "'><span style='cursor:hand;font-size:12px; color:Black;' oncontextmenu=showMenu(" + DT.Rows[0]["ID"].ToString() + "," + DT.Rows[0]["fatherID"].ToString() + "); onclick=alert('" + DT.Rows[0]["name"].ToString() + "'); >" + DT.Rows[0]["name"].ToString() + "</span></a>";
185 MyConn.Close();
186 }
187 catch
188 {
189 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
190 }
191 return changeHtml;
192 }
193
194 //************************
195 //** 获取节点修改表单 **
196 //************************
197 public string getEdit()
198 {
199 string editHtml = "";
200 string startValue = "";
201 string id = Request.QueryString["id"];
202 if (!IsNumber(id))
203 {
204 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
205 }
206 string StrSql = "Select * From tree Where id=" + id;
207 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
208 try
209 {
210 MyConn.Open();
211 OleDbDataAdapter odAdapt = new OleDbDataAdapter(StrSql, MyConn);
212 DataSet DS = new DataSet();
213 odAdapt.Fill(DS);
214 DataTable DT = DS.Tables[0];
215 startValue = DT.Rows[0]["name"].ToString().Trim();
216 MyConn.Close();
217 editHtml = editHtml + "<input onblur=postEdit(" + id + ") name='editName" + id + "' type='text' value='" + startValue + "' size='15'>";
218 return editHtml;
219 }
220 catch
221 {
222 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
223 }
224 }
225
226 //**********************
227 //** 保存修改的节点 **
228 //**********************
229 public string saveEdit()
230 {
231 string id = Request.QueryString["id"];
232 if (!IsNumber(id))
233 {
234 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
235 }
236 string Name = Request["Name"];
237 if (Name.CompareTo("")==0)
238 {
239 return "nameNull";
240 }
241 if (!checkName(Name,id))
242 {
243 return "editNameRep" + id;
244 }
245 string StrSql = "Select * From tree Where id=" + id;
246 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
247 try
248 {
249 MyConn.Open();
250 OleDbDataAdapter odAdapt = new OleDbDataAdapter(StrSql, MyConn);
251 OleDbCommandBuilder oCB = new OleDbCommandBuilder(odAdapt);
252 DataSet DS = new DataSet();
253 odAdapt.Fill(DS);
254 DataTable DT = DS.Tables[0];
255 DT.Rows[0]["name"] = Name;
256 odAdapt.Update(DS);
257 MyConn.Close();
258 return "edited" + id;
259 }
260 catch
261 {
262 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
263 }
264 }
265
266 //************************
267 //** 返回修改后的节点 **
268 //************************
269 public string returnEdit()
270 {
271 string editHtml = "";
272 string startValue = "";
273 string fatherID = "";
274 string id = Request.QueryString["id"];
275 if (!IsNumber(id))
276 {
277 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
278 }
279 string StrSql = "Select * From tree Where id=" + id;
280 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
281 try
282 {
283 MyConn.Open();
284 OleDbDataAdapter odAdapt = new OleDbDataAdapter(StrSql, MyConn);
285 DataSet DS = new DataSet();
286 odAdapt.Fill(DS);
287 DataTable DT = DS.Tables[0];
288 startValue = DT.Rows[0]["name"].ToString().Trim();
289 fatherID = DT.Rows[0]["fatherID"].ToString().Trim();
290 MyConn.Close();
291 editHtml = editHtml + "<span style='cursor:hand;font-size:12px; color:Black;' oncontextmenu=showMenu(" + id + "," + fatherID + "); onclick=alert('" + startValue + "'); >" + startValue + "</span>";
292 return editHtml;
293 }
294 catch
295 {
296 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
297 }
298 }
299
300 //****************
301 //** 删除节点 **
302 //****************
303 public string del()
304 {
305 string id = Request.QueryString["id"];
306 if (!IsNumber(id))
307 {
308 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
309 }
310 string fatherID = Request.QueryString["fatherID"];
311 if (!IsNumber(fatherID))
312 {
313 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
314 }
315 string StrSql = "select * From Tree where fatherID=" + id;
316 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
317 OleDbCommand MyCmd = new OleDbCommand(StrSql, MyConn);
318 try
319 {
320 MyCmd.Connection.Open();
321 OleDbDataReader Dr = MyCmd.ExecuteReader();
322 if (Dr.Read())
323 {
324 return "deletError" + fatherID;
325 }
326 MyCmd.Connection.Close();
327 }
328 catch
329 {
330 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
331 }
332 string StrSql2 = "Delete * From Tree where id=" + id;
333 OleDbConnection MyConn2 = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
334 OleDbCommand myCmd2 = new OleDbCommand(StrSql2, MyConn2);
335 try
336 {
337 MyConn2.Open();
338 myCmd2.ExecuteReader();
339 MyConn2.Close();
340 return "deleted" + fatherID;
341 }
342 catch
343 {
344 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
345 }
346 }
347
348 //************************
349 //** 判断名字是否存在 **
350 //************************
351 public bool checkName(string name,string id)
352 {
353 name = MoveBidStr(name);
354 string StrSql = "";
355 if (id.CompareTo("") == 0)
356 {
357 StrSql = "select * from Tree where name='" + name + "'";
358 }
359 else
360 {
361 StrSql = "select * from Tree where name='" + name + "' and id<>" + id;
362 }
363 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
364 OleDbCommand MyCmd = new OleDbCommand(StrSql, MyConn);
365 try
366 {
367 MyCmd.Connection.Open();
368 OleDbDataReader Dr = MyCmd.ExecuteReader();
369 if (Dr.Read())
370 {
371 return false;
372 }
373 else
374 {
375 return true;
376 }
377 MyCmd.Connection.Close();
378 }
379 catch
380 {
381 return false;
382 }
383 }
384 //**************************
385 //** 判断是否是数字组合 **
386 //**************************
387 public bool IsNumber(string strDate)
388 {
389 if (strDate == null)
390 {
391 return false;
392 }
393 if (strDate.Equals(string.Empty))
394 {
395 return false;
396 }
397
398 Regex numRegex = new Regex(@"0*[0-9][0-9]*$");
399 return numRegex.IsMatch(strDate);
400 }
401 //******************
402 //** 过滤'"符号 **
403 //******************
404 public string MoveBidStr(string strString)
405 {
406 string str;
407 str = strString;
408 if (str != null)
409 {
410 str = str.Replace("'", "''");
411 str = str.Replace(((char)39).ToString(), ((char)39 + (char)39).ToString());
412 }
413 return str;
414 }
415 </script>
416
昨天写了个简单的模拟Windows文件夹的AJAX无限级菜单树，希望下载后对大家有点用处。
开发环境：VS2005、C#、.net2.0、Access、AJAX引擎是自己写的，没有用到AJAX的DLL。
运行环境：IE
具体的功能与界面如下：
初始菜单：
展开文件夹：
新建同级：
 |
 |
 |
新建子级：
 |
 |
修改：
 |
 |
删除：
 |
 |
右键菜单,模拟Windows失去焦点自动保存,判断是否重名，删除提示！
下面是3个程序主文件代码(Tree.htm、Tree.aspx、Ajax.js)
tree.htm1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2 <html xmlns="http://www.w3.org/1999/xhtml" >
3 <head>
4 <meta http-equiv="Content-Type" content="text/html; charset=GB2312" />
5 <title>无限级联极菜单树</title>
6 <script language="javascript" type="text/javascript" src="js/Ajax.js"></script>
7 <script language="javascript" type="text/javascript">
8 <!--
9 function window.onload()
10 {
11 getdata("tree.aspx?mode=getTree&fatherID=0","divAjax");
12 }
13 -->
14 </script>
15 </head>
16 <body>
17 <div id='divAjax'></div>
18 <div id="contextmenu" style="text-align:center;border:1px solid #666666;background:#eeeeee;width:60px;padding:5px;display:none;position:absolute"></div>
19 </body>
20 </html>
21
Ajax.js1 function $(id)
2 {
3 return document.getElementById(id);
4 }
5 function echo(obj,html)
6 {
7 $(obj).innerHTML=html;
8 }
9 function createxmlhttp()
10 {
11 var xmlhttp = false;
12 try
13 {
14 xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
15 }
16 catch (e)
17 {
18 try
19 {
20 xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
21 }
22 catch (e)
23 {
24 xmlhttp = false;
25 }
26 }
27 if (!xmlhttp && typeof XMLHttpRequest!='undefined')
28 {
29 xmlhttp = new XMLHttpRequest();
30 if (xmlhttp.overrideMimeType)
31 {
32 //设置MiME类别
33 xmlhttp.overrideMimeType('text/xml');
34 }
35 }
36 return xmlhttp;
37 }
38 //向服务器获取数据
39 function getdata(url,obj,initJS)
40 {
41 var xmlhttp = createxmlhttp();
42 xmlhttp.onreadystatechange=requestdata;
43 xmlhttp.open("GET",url,true);
44 xmlhttp.setRequestHeader("If-Modified-Since","0");
45 xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
46 xmlhttp.send(null);
47 function requestdata()
48 {
49 echo(obj,"<IMG SRC='Images/loading.gif' /> <span style=' font-size:12px; color:Black;'>loading
..</span><br>");50 if(xmlhttp.readyState==4)
51 {
52 if(xmlhttp.status==200)
53 {
54 echo(obj,xmlhttp.responseText);
55 if(initJS != null)
56 {
57 getInitJS(initJS);
58 }
59 }
60 }
61 }
62 }
63 //向服务器发送数据
64 function postdata(url,obj,data)
65 {
66 var xmlhttp= createxmlhttp();
67 xmlhttp.onreadystatechange=requestdata;
68 xmlhttp.open("POST", url, true);
69 xmlhttp.setRequestHeader("If-Modified-Since","0");
70 xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
71 xmlhttp.send(data);
72 function requestdata()
73 {
74 echo(obj,"<IMG SRC='Images/loading.gif' /> <span style=' font-size:12px; color:Black;'>loading
..</span><br>");75 if(xmlhttp.readyState==4)
76 {
77 if(xmlhttp.status==200)
78 {
79 if(!postInitJS(xmlhttp.responseText))
80 {
81 echo(obj,xmlhttp.responseText);
82 }
83 }
84 }
85 }
86 }
87
88 function ShowSub(id,flag)
89 {
90 if(flag=="1")
91 {
92 eval("sub" + id).style.display='';
93 document.images["AddImg" + id].src='Images/subImg.bmp';
94 return;
95 }
96 if(flag=="0")
97 {
98 eval("sub" + id).style.display='none';
99 document.images["AddImg" + id].src='Images/addImg.bmp';
100 return;
101 }
102 if(eval("sub" + id).style.display=='none')
103 {
104 eval("sub" + id).style.display='';
105 document.images["AddImg" + id].src='Images/subImg.bmp';
106 return;
107 }
108 else
109 {
110 eval("sub" + id).style.display='none';
111 document.images["AddImg" + id].src='Images/addImg.bmp';
112 return;
113 }
114 }
115
116 function showMenu(id,fatherID)
117 {
118 contextmenu.style.posLeft = document.body.scrollLeft + event.x + 10 ;
119 contextmenu.style.posTop = document.body.scrollTop + event.y + 10;
120 var menuHtml = "";
121 menuHtml = menuHtml + "<span style='cursor:hand;font-size:12px; color:Black;' onmousemove=this.style.backgroundColor='#00cccc'; onmouseout=this.style.backgroundColor=''; onclick=getdata('tree.aspx?mode=getAdd&fatherID=" + fatherID + "','add" + fatherID + "','addFocus" + fatherID + "');closeMenu(); >添加同级</span><br />";
122 menuHtml = menuHtml + "<span style='cursor:hand;font-size:12px; color:Black;' onmousemove=this.style.backgroundColor='#00cccc'; onmouseout=this.style.backgroundColor=''; onclick=getdata('tree.aspx?mode=addSub&id=" + id + "','addSub" + id + "','getTree" + id + "');closeMenu(); >添加子级</span><br />";
123 menuHtml = menuHtml + "<span style='cursor:hand;font-size:12px; color:Black;' onmousemove=this.style.backgroundColor='#00cccc'; onmouseout=this.style.backgroundColor=''; onclick=getdata('tree.aspx?mode=getEdit&id=" + id + "','edit" + id + "','editFocus" + id + "');closeMenu(); >修 改</span><br />";
124 menuHtml = menuHtml + "<span style='cursor:hand;font-size:12px; color:Black;' onmousemove=this.style.backgroundColor='#00cccc'; onmouseout=this.style.backgroundColor=''; onclick=closeMenu();if(confirm('你确定要删除此菜单吗？')){postdata('tree.aspx?mode=del&id=" + id + "&fatherID=" + fatherID + "','edit" + id + "');} >删 除</span>";
125 document.getElementById('contextmenu').innerHTML = menuHtml ;
126 contextmenu.style.display = "" ;
127 }
128
129 function closeMenu()
130 {
131 contextmenu.style.display="none";
132 }
133
134 document.oncontextmenu=function()
135 {
136 return false;
137 }
138
139 document.onclick=function()
140 {
141 if(document.activeElement!=contextmenu)
142 {
143 closeMenu();
144 }
145 }
146 function getInitJS(JS)
147 {
148 if(JS.substr(0,6)=='addSub')
149 {
150 id=JS.substr(6,JS.length);
151 getdata('tree.aspx?mode=getAdd&fatherID=' + id,'add' + id,'addFocus' + id);
152 }
153 if(JS.substr(0,8)=='addFocus')
154 {
155 id=JS.substr(8,JS.length);
156 $('addName'+id).select();
157 }
158 if(JS.substr(0,9)=='editFocus')
159 {
160 id=JS.substr(9,JS.length);
161 $('editName'+id).select();
162 }
163 if(JS.substr(0,7)=='getTree')
164 {
165 id=JS.substr(7,JS.length);
166 getdata('tree.aspx?mode=getTree&fatherID=' + id,'sub' + id,'addSub' + id);
167 ShowSub(id,'1');
168 }
169 }
170 function postInitJS(JS)
171 {
172 if(JS.substr(0,5)=='added')
173 {
174 id=JS.substr(5,JS.length);
175 if(id=="0")
176 {
177 getdata("tree.aspx?mode=getTree&fatherID=0","divAjax");
178 }
179 else
180 {
181 getdata("tree.aspx?mode=getTree&fatherID=" + id,"sub" + id );
182 }
183 return true;
184 }
185 if(JS.substr(0,6)=='edited')
186 {
187 id=JS.substr(6,JS.length);
188 getdata('tree.aspx?mode=returnEdit&id=' + id,'edit' + id );
189 return true;
190 }
191 if(JS.substr(0,10)=='addNameRep')
192 {
193 id=JS.substr(10,JS.length);
194 alert('此菜单名已经存在');
195 getdata('tree.aspx?mode=getAdd&fatherID=' + id ,'add' + id ,'addFocus' + id);
196 return true;
197 }
198 if(JS.substr(0,11)=='editNameRep')
199 {
200 id=JS.substr(11,JS.length);
201 alert('此菜单名已经存在');
202 getdata('tree.aspx?mode=getEdit&id=' + id ,'edit' + id ,'editFocus' + id);
203 return true;
204 }
205 if(JS.substr(0,10)=='deletError')
206 {
207 id=JS.substr(10,JS.length);
208 alert('请先删除此菜单的子级项');
209 if(id=="0")
210 {
211 getdata("tree.aspx?mode=getTree&fatherID=0","divAjax");
212 }
213 else
214 {
215 getdata("tree.aspx?mode=getTree&fatherID=" + id,"sub" + id );
216 }
217 return true;
218 }
219 if(JS.substr(0,7)=='deleted')
220 {
221 id=JS.substr(7,JS.length);
222 if(id=="0")
223 {
224 getdata("tree.aspx?mode=getTree&fatherID=0","divAjax");
225 }
226 else
227 {
228 getdata("tree.aspx?mode=getTree&fatherID=" + id,"sub" + id );
229 }
230 return true;
231 }
232 return false;
233 }
234
235 function postAdd(id)
236 {
237 if($('addName'+id).value=='')
238 {
239 alert('菜单名字不能为空！');
240 $('addName'+id).focus();
241 return false;
242 }
243 data="Name="+($('addName'+id).value);
244 postdata('tree.aspx?mode=saveAdd&fatherID=' + id ,'add' + id,data);
245 }
246
247 function postEdit(id)
248 {
249 if($('editName'+id).value=='')
250 {
251 alert('菜单名字不能为空！');
252 $('editName'+id).focus();
253 return false;
254 }
255 data="Name="+($('editName'+id).value);
256 postdata('tree.aspx?mode=saveEdit&id=' + id ,'edit' + id,data);
257 }
258
tree.aspx1 <%@ import namespace="System" %>
2 <%@ import namespace="System.Data" %>
3 <%@ import namespace="System.Configuration" %>
4 <%@ import namespace="System.Collections" %>
5 <%@ import namespace="System.Configuration" %>
6 <%@ import namespace="System.Web" %>
7 <%@ import namespace="System.Web.Security" %>
8 <%@ import namespace="System.Web.UI" %>
9 <%@ import namespace="System.Web" %>
10 <%@ import namespace="System.Web.UI.WebControls" %>
11 <%@ import namespace="System.Web.UI.WebControls.WebParts" %>
12 <%@ import namespace="System.Web.UI.HtmlControls" %>
13 <%@ import namespace="System.Data.OleDb" %>
14 <%@ Page Language="C#" %>
15
16 <script runat="server">
17 //Webconfig文件中获取数据库路径
18 public string g_StrConn = ConfigurationManager.AppSettings["Conn_Access"];
19 protected void Page_Load(object sender, EventArgs e)
20 {
21 string mode = Request.QueryString["mode"];
22 switch (mode)
23 {
24 case "getTree":
25 Response.Write(getTree());
26 break;
27 case "getAdd":
28 Response.Write(getAdd());
29 break;
30 case "saveAdd":
31 Response.Write(saveAdd());
32 break;
33 case "getEdit":
34 Response.Write(getEdit());
35 break;
36 case "saveEdit":
37 Response.Write(saveEdit());
38 break;
39 case "addSub":
40 Response.Write(addSub());
41 break;
42 case "del":
43 Response.Write(del());
44 break;
45 case "returnEdit":
46 Response.Write(returnEdit());
47 break;
48 }
49 }
50
51 //******************
52 //** 获取树结构 **
53 //******************
54 public string getTree()
55 {
56 string fatherID = Request.QueryString["fatherID"];
57 if (!IsNumber(fatherID))
58 {
59 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
60 }
61 string StrSql = "Select * From tree Where FatherID=" + fatherID + " Order By Name Asc";
62 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
63 OleDbCommand MyCmd = new OleDbCommand(StrSql, MyConn);
64 try
65 {
66 MyCmd.Connection.Open();
67 OleDbDataReader Dr = MyCmd.ExecuteReader();
68 string TopStr = "<a id='add" + fatherID + "'></a><table border='0' cellpadding='0' cellspacing='0' style='width: 100%; height: 10px'>";
69 string BottomStr = "</table>";
70 string MiddleStr = "";
71 while (Dr.Read())
72 {
73 MiddleStr = MiddleStr + "<tr><td align='left' valign='middle' style='width:200px;height:22px;' colspan='2'><span id='addSub" + Dr["ID"].ToString() + "'>";
74 string StrSql2 = "Select * From tree Where FatherID=" + Dr["ID"].ToString();
75 OleDbConnection MyConn2 = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
76 OleDbCommand MyCmd2 = new OleDbCommand(StrSql2, MyConn2);
77 try
78 {
79 MyCmd2.Connection.Open();
80 OleDbDataReader Dr2 = MyCmd2.ExecuteReader();
81 if (Dr2.Read())
82 {
83 MiddleStr = MiddleStr + "<img alt='' id='AddImg" + Dr["ID"].ToString() + "' src='Images/addImg.bmp' onclick=getdata('tree.aspx?mode=getTree&fatherID=" + Dr["ID"].ToString() + "','sub" + Dr["id"].ToString() + "');ShowSub(" + Dr["id"].ToString() + "); /> <img alt='' src='Images/folder.bmp' /> <a id='edit" + Dr["ID"].ToString() + "'><span style='cursor:hand;font-size:12px; color:Black;' oncontextmenu=showMenu(" + Dr["ID"].ToString() + "," + fatherID + "); onclick=alert('" + Dr["Name"].ToString() + "'); >" + Dr["Name"].ToString() + "</span></a>";
84 }
85 else
86 {
87 MiddleStr = MiddleStr + "<span style='font-size:11px; color:Black;'> </span><img alt='' src='Images/folder.bmp' /> <a id='edit" + Dr["ID"].ToString() + "'><span style='cursor:hand;font-size:12px; color:Black;' oncontextmenu=showMenu(" + Dr["ID"].ToString() + "," + fatherID + "); onclick=alert('" + Dr["Name"].ToString() + "');>" + Dr["Name"].ToString() + "</span></a>";
88 }
89 MyCmd2.Connection.Close();
90 }
91 catch
92 {
93 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
94 }
95 MiddleStr = MiddleStr + "</span></td></tr><tr><td align='left' valign='middle' style='width:22px;'></td><td align='left' valign='middle' ><div style='display:none;' id='sub" + Dr["id"].ToString() + "'></div></td></tr>";
96 }
97 MyCmd.Connection.Close();
98 return TopStr + MiddleStr + BottomStr;
99 }
100 catch
101 {
102 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
103 }
104 }
105
106 //************************
107 //** 获取节点新增表单 **
108 //************************
109 public string getAdd()
110 {
111 string addHtml = "";
112 string fatherID = Request.QueryString["fatherID"];
113 if (!IsNumber(fatherID))
114 {
115 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
116 }
117 addHtml = addHtml + "<span style='font-size:11px; color:Black;'> </span><img alt='' src='Images/folder.bmp' /> <input onblur=postAdd(" + fatherID + ") name='addName" + fatherID + "' type='text' value='新建菜单项' size='15'><br />";
118 return addHtml;
119 }
120
121 //**********************
122 //** 保存新增的节点 **
123 //**********************
124 public string saveAdd()
125 {
126 string id = Request.QueryString["id"];
127 string Name = Request["Name"];
128 if (Name.CompareTo("") == 0)
129 {
130 return "nameNull";
131 }
132 string fatherID = Request["fatherID"];
133 if (!IsNumber(fatherID))
134 {
135 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
136 }
137 if (!checkName(Name,""))
138 {
139 return "addNameRep" + fatherID;
140 }
141 string StrSql = "Select * From tree";
142 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
143 try
144 {
145 MyConn.Open();
146 OleDbDataAdapter odAdapt = new OleDbDataAdapter(StrSql, MyConn);
147 OleDbCommandBuilder oCB = new OleDbCommandBuilder(odAdapt);
148 DataSet DS = new DataSet();
149 odAdapt.Fill(DS);
150 DataRow DR = DS.Tables[0].NewRow();
151 DR["name"] = Name;
152 DR["fatherID"] = fatherID;
153 DS.Tables[0].Rows.Add(DR);
154 odAdapt.Update(DS);
155 MyConn.Close();
156 return "added" + fatherID;
157 }
158 catch
159 {
160 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
161 }
162 }
163
164 //********************
165 //** 新增子级节点 **
166 //********************
167 public string addSub()
168 {
169 string changeHtml = "";
170 string id = Request.QueryString["id"];
171 if (!IsNumber(id))
172 {
173 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
174 }
175 string StrSql = "Select * From tree Where id=" + id;
176 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
177 try
178 {
179 MyConn.Open();
180 OleDbDataAdapter odAdapt = new OleDbDataAdapter(StrSql, MyConn);
181 DataSet DS = new DataSet();
182 odAdapt.Fill(DS);
183 DataTable DT = DS.Tables[0];
184 changeHtml = changeHtml + "<img alt='' id='AddImg" + DT.Rows[0]["ID"].ToString() + "' src='Images/addImg.bmp' onclick=getdata('tree.aspx?mode=getTree&fatherID=" + DT.Rows[0]["ID"].ToString() + "','sub" + DT.Rows[0]["ID"].ToString() + "');ShowSub(" + DT.Rows[0]["ID"].ToString() + "); /> <img alt='' src='Images/folder.bmp' /> <a id='edit" + DT.Rows[0]["ID"].ToString() + "'><span style='cursor:hand;font-size:12px; color:Black;' oncontextmenu=showMenu(" + DT.Rows[0]["ID"].ToString() + "," + DT.Rows[0]["fatherID"].ToString() + "); onclick=alert('" + DT.Rows[0]["name"].ToString() + "'); >" + DT.Rows[0]["name"].ToString() + "</span></a>";
185 MyConn.Close();
186 }
187 catch
188 {
189 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
190 }
191 return changeHtml;
192 }
193
194 //************************
195 //** 获取节点修改表单 **
196 //************************
197 public string getEdit()
198 {
199 string editHtml = "";
200 string startValue = "";
201 string id = Request.QueryString["id"];
202 if (!IsNumber(id))
203 {
204 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
205 }
206 string StrSql = "Select * From tree Where id=" + id;
207 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
208 try
209 {
210 MyConn.Open();
211 OleDbDataAdapter odAdapt = new OleDbDataAdapter(StrSql, MyConn);
212 DataSet DS = new DataSet();
213 odAdapt.Fill(DS);
214 DataTable DT = DS.Tables[0];
215 startValue = DT.Rows[0]["name"].ToString().Trim();
216 MyConn.Close();
217 editHtml = editHtml + "<input onblur=postEdit(" + id + ") name='editName" + id + "' type='text' value='" + startValue + "' size='15'>";
218 return editHtml;
219 }
220 catch
221 {
222 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
223 }
224 }
225
226 //**********************
227 //** 保存修改的节点 **
228 //**********************
229 public string saveEdit()
230 {
231 string id = Request.QueryString["id"];
232 if (!IsNumber(id))
233 {
234 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
235 }
236 string Name = Request["Name"];
237 if (Name.CompareTo("")==0)
238 {
239 return "nameNull";
240 }
241 if (!checkName(Name,id))
242 {
243 return "editNameRep" + id;
244 }
245 string StrSql = "Select * From tree Where id=" + id;
246 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
247 try
248 {
249 MyConn.Open();
250 OleDbDataAdapter odAdapt = new OleDbDataAdapter(StrSql, MyConn);
251 OleDbCommandBuilder oCB = new OleDbCommandBuilder(odAdapt);
252 DataSet DS = new DataSet();
253 odAdapt.Fill(DS);
254 DataTable DT = DS.Tables[0];
255 DT.Rows[0]["name"] = Name;
256 odAdapt.Update(DS);
257 MyConn.Close();
258 return "edited" + id;
259 }
260 catch
261 {
262 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
263 }
264 }
265
266 //************************
267 //** 返回修改后的节点 **
268 //************************
269 public string returnEdit()
270 {
271 string editHtml = "";
272 string startValue = "";
273 string fatherID = "";
274 string id = Request.QueryString["id"];
275 if (!IsNumber(id))
276 {
277 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
278 }
279 string StrSql = "Select * From tree Where id=" + id;
280 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
281 try
282 {
283 MyConn.Open();
284 OleDbDataAdapter odAdapt = new OleDbDataAdapter(StrSql, MyConn);
285 DataSet DS = new DataSet();
286 odAdapt.Fill(DS);
287 DataTable DT = DS.Tables[0];
288 startValue = DT.Rows[0]["name"].ToString().Trim();
289 fatherID = DT.Rows[0]["fatherID"].ToString().Trim();
290 MyConn.Close();
291 editHtml = editHtml + "<span style='cursor:hand;font-size:12px; color:Black;' oncontextmenu=showMenu(" + id + "," + fatherID + "); onclick=alert('" + startValue + "'); >" + startValue + "</span>";
292 return editHtml;
293 }
294 catch
295 {
296 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
297 }
298 }
299
300 //****************
301 //** 删除节点 **
302 //****************
303 public string del()
304 {
305 string id = Request.QueryString["id"];
306 if (!IsNumber(id))
307 {
308 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
309 }
310 string fatherID = Request.QueryString["fatherID"];
311 if (!IsNumber(fatherID))
312 {
313 return "<span style='font-size:12px; color:Black;'>禁止提交非法的数据！</span>";
314 }
315 string StrSql = "select * From Tree where fatherID=" + id;
316 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
317 OleDbCommand MyCmd = new OleDbCommand(StrSql, MyConn);
318 try
319 {
320 MyCmd.Connection.Open();
321 OleDbDataReader Dr = MyCmd.ExecuteReader();
322 if (Dr.Read())
323 {
324 return "deletError" + fatherID;
325 }
326 MyCmd.Connection.Close();
327 }
328 catch
329 {
330 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
331 }
332 string StrSql2 = "Delete * From Tree where id=" + id;
333 OleDbConnection MyConn2 = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
334 OleDbCommand myCmd2 = new OleDbCommand(StrSql2, MyConn2);
335 try
336 {
337 MyConn2.Open();
338 myCmd2.ExecuteReader();
339 MyConn2.Close();
340 return "deleted" + fatherID;
341 }
342 catch
343 {
344 return "<span style='font-size:12px; color:Black;'>数据库连接失败！</span>";
345 }
346 }
347
348 //************************
349 //** 判断名字是否存在 **
350 //************************
351 public bool checkName(string name,string id)
352 {
353 name = MoveBidStr(name);
354 string StrSql = "";
355 if (id.CompareTo("") == 0)
356 {
357 StrSql = "select * from Tree where name='" + name + "'";
358 }
359 else
360 {
361 StrSql = "select * from Tree where name='" + name + "' and id<>" + id;
362 }
363 OleDbConnection MyConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" + Server.MapPath(g_StrConn));
364 OleDbCommand MyCmd = new OleDbCommand(StrSql, MyConn);
365 try
366 {
367 MyCmd.Connection.Open();
368 OleDbDataReader Dr = MyCmd.ExecuteReader();
369 if (Dr.Read())
370 {
371 return false;
372 }
373 else
374 {
375 return true;
376 }
377 MyCmd.Connection.Close();
378 }
379 catch
380 {
381 return false;
382 }
383 }
384 //**************************
385 //** 判断是否是数字组合 **
386 //**************************
387 public bool IsNumber(string strDate)
388 {
389 if (strDate == null)
390 {
391 return false;
392 }
393 if (strDate.Equals(string.Empty))
394 {
395 return false;
396 }
397
398 Regex numRegex = new Regex(@"0*[0-9][0-9]*$");
399 return numRegex.IsMatch(strDate);
400 }
401 //******************
402 //** 过滤'"符号 **
403 //******************
404 public string MoveBidStr(string strString)
405 {
406 string str;
407 str = strString;
408 if (str != null)
409 {
410 str = str.Replace("'", "''");
411 str = str.Replace(((char)39).ToString(), ((char)39 + (char)39).ToString());
412 }
413 return str;
414 }
415 </script>
416
程序写的比较急，所以没有进行整理和注释，会感觉乱乱的，希望大家别介意，有问题或需要改进的地方请大家留言。
源码下载 AjaxTree.rar
