动态菜单(二)

   这天都能感冒，悲剧。上次写到一半一个Ctrl+C 浏览器崩溃了。沉重的被打击了。。

   上次我们说的是输出html组成动态菜单。同学们有没有改成递归的形式？没有改的同学就是不喜欢学习的同学。

   这次我们来个Repeater嵌套Repeater组成的二级菜单.典型的应用一个Iframe，左边是菜单，右边是内容。有上下LOGO先上个图看看效果.

 

   还算可以吧 这东西做简单的系统 可以直接用了。

   里面还封装了一个弹出框比如点击版本信息会弹出一个遮罩效果的弹出框这里就不上图了。

 先说说iframe设置

  1  < body  scroll ="no"  leftmargin ="0"  topmargin ="0"  marginheight ="0"  marginwidth ="0" >
  2       < table  border ="0"  cellspacing ="0"  cellpadding ="0"  width ="100%"  height ="100%" >
  3           < tr >
  4               < td  width ="100%"  height ="50"  colspan ="3"  style ="border-bottom: 1px solid #000000" >
  5                   < table  height ="49"  border ="0"  cellspacing ="0"  cellpadding ="0"  width ="100%"  class ="font_size" >
  6                       < tr >
  7                           < td  style ="background-image: url(images/top-gray.gif); background-repeat: no-repeat;
  8                              background-position: right top" >
  9                               < b > Ziye.Net </ b >
 10                               < br  />
 11                               < font  size ="2"  color ="#999999"  face ="Verdana, Arial, Helvetica, sans-serif" > &nbsp;   &nbsp;
 12                                   &nbsp;&nbsp;  动态菜单(二)Iframe应用 </ font >
 13                           </ td >
 14                           < td  style ="background-image: url(images/top-gray.gif); background-repeat: no-repeat;
 15                              background-position: right top"  valign ="bottom" >
 16                               &nbsp;
 17                           </ td >
 18                       </ tr >
 19                   </ table >
 20               </ td >
 21           </ tr >
 22           <%
 23              switch (MenuStyle)
 24              {
 25                   case   0 :
 26           %>
 27           < tr >
 28               < td  id ="frmTitle"  name ="frmTitle"  nowrap ="nowrap"  valign ="middle"  align ="center"
 29                  width ="198"  style ="border-right: 1px solid #000000" >
 30                   < iframe  name ="BoardTitle"  style ="height: 100%; visibility: inherit; width: 198; z-index: 2"
 31                      scrolling ="auto"  frameborder ="0"  src ="left.aspx" ></ iframe >
 32               </ td >
 33               < td  style ="width: 10pt"  bgcolor ="#7898A8"  title ="关闭/打开左栏"  class ="navPoint" >
 34                   < table  border ="0"  cellpadding ="0"  cellspacing ="0"  width ="11"  height ="100%"  align ="right" >
 35                       < tr >
 36                           < td  valign ="middle"  align ="right"  class ="middleCss"  style ="width: 13px" >
 37                               < img  border ="0"  src ="images/Menu/close.gif"  id ="menuimg"  alt ="隐藏左栏"  onmouseover ="javascript: menuonmouseover();"
 38                                  onmouseout ="javascript: menuonmouseout();"  onclick ="javascript:switchSysBar()"
 39                                  style ="cursor: hand"  width ="11"  height ="76"   />
 40                           </ td >
 41                       </ tr >
 42                   </ table >
 43               </ td >
 44               < td  style ="width: 100%" >
 45                   < iframe  id ="mainFrame"  name ="mainFrame"  style ="height: 100%; visibility: inherit;
 46                      width: 100%; z-index: 1"  scrolling ="auto"  frameborder ="0"  src ="Manage_Welcome.aspx" >
 47                   </ iframe >
 48               </ td >
 49           </ tr >
 50           <%
 51              break;
 52           case   1 :
 53              
 54           %>
 55           <% -- 测试 -- %>
 56           <%
 57              break;
 58           case   2 :
 59           %>
 60           <% --  测试 -- %>
 61           <%
 62              break;
 63 
 64      }
 65           %>
 66           < tr >
 67               < td  colspan ="3"  height ="20" >
 68                   < table  border ="0"  cellpadding ="0"  cellspacing ="0"  width ="100%"  height ="20" >
 69                       < tr >
 70                           < td  colspan ="3"  height ="20" >
 71                               < table  border ="0"  cellpadding ="0"  cellspacing ="0"  width ="100%"  height ="20" >
 72                                   < tr >
 73                                       < td  class ="down_text"  style ="height: 20px" >
 74                                          Powered By  < a  href ="http://hi.csdn.net/wxr0323"  target ="_blank" >< font  color ="#ffffff" > Ziye.com </ font ></ a >
 75                                          Information Technology Logistics Inc.QQ:459919
 76                                       </ td >
 77                                   </ tr >
 78                               </ table >
 79                           </ td >
 80                           < td  align ="right"  width ="400"  bgcolor ="#000000" >
 81                               < table  border ="0"  cellpadding ="0"  cellspacing ="0"  width ="100%" >
 82                                   < tr >
 83                                       < td  style ="cursor: pointer; border-left: 1px solid #FFFFFF;"  onclick ="javascript:showPopWin('子夜','Manage_Welcome.aspx?rand'+rand(100000000),400, 255, AlertMessageBox,true)" >
 84                                           &nbsp; < img  src ="images/userset.gif"  style ="margin-bottom: -3px" > &nbsp; < img  src ="images/about.gif"
 85                                              style ="margin-bottom: -3px" > &nbsp; < font  color ="#FFFFFF" > 版本信息 </ font >
 86                                       </ td >                                   
 87                                       < td  style ="cursor: pointer; border-left: 1px solid #FFFFFF;"  onclick ="javascript: window.mainFrame.location.href='Manage_Welcome.aspx'" >
 88                                           &nbsp; < img  src ="images/house.gif"  style ="margin-bottom: -3px" > &nbsp; < font  color ="#FFFFFF" > 回到首页 </ font >
 89                                       </ td >
 90                                       < td  style ="cursor: pointer; border-left: 1px solid #FFFFFF;"  onclick ="javascript: window.top.location.href = 'http://hi.csdn.net/wxr0323'" >
 91                                           &nbsp; < img  src ="images/logout.gif"  style ="margin-bottom: -3px" > &nbsp; < font  color ="#FFFFFF" > 退出系统 </ font >
 92                                       </ td >
 93                                       < td  style ="cursor: pointer; border-left: 1px solid #FFFFFF;"  onclick ="javascript:window.open('http://hi.csdn.net/wxr0323');" >
 94                                           &nbsp; < img  src ="images/help.gif"  style ="margin-bottom: -3px" > &nbsp; < font  color ="#FFFFFF" > 帮助手册 </ font >
 95                                       </ td >
 96                                   </ tr >
 97                               </ table >
 98                           </ td >
 99                       </ tr >
100                   </ table >
101               </ td >
102           </ tr >
103       </ table >
104  </ body >

 104行代码

 

< iframe  name ="BoardTitle"  style ="height: 100%; visibility: inherit; width: 198; z-index: 2" scrolling ="auto"  frameborder ="0"  src ="left.aspx" ></ iframe >

这一个iframe是指向菜单的。

 

 

 

< iframe  id ="mainFrame"  name ="mainFrame"  style ="height: 100%; visibility: inherit;                       width: 100%; z-index: 1"  scrolling ="auto"  frameborder ="0"  src ="Manage_Welcome.aspx" >
</ iframe >

这一个iframe是指向右边的页面。

 

 

 

 

从22行开始 switch(MenuStyle). 这个考虑到了分组权限。

第一个是当MenuStyle=0的时候加载第一个TR。等于1的时候可以加载第二个TR.

当一个用户是管理员的时候，可以在后台设置

 

public int MenuStyle = 0;(此代码是Default后台代码)

这样他登陆此页面的时候就加载为0下的TR了 

 

 

当用户是非管理员的时候可以设置 为1 就加载为1的HTML。

 

public int MenuStyle = 数据库中读取的字段;

这样是不是就有效的分组了呢？加载的时候里层可以在嵌一层用户权限列表。什么意思呢。最后讨论。这里只要知道不同的MenuStyle读取不同的TR就可以了 剩下的代码就是一些无聊的JS了。。

 

接下来我们开始整菜单。

 

数据库结构还有"SqlHelper"跟上节课的一样 

 

建立页面left.aspx;

repeater嵌套repeater

 

 1  < asp:Repeater  ID ="LeftMenu"  runat ="server"  OnItemDataBound ="LeftMenu_ItemDataBound" >
 2           < ItemTemplate >
 3               < table  cellspacing ="0"  cellpadding ="0"  width ="159"  align ="center"  border ="0" >
 4                   < tr >
 5                       < td  width ="23" >
 6                           < img  height ="25"  src ="images/Menu/box_topleft.gif"  width ="23" >
 7                       </ td >
 8                       < td  class ="ttl"  onclick ="JavaScript:showHide('M_<%# Eval(" Menu_ID")% > ');" width="129"
 9                          background="images/Menu/box_topbg.gif">
10                           <% #  Eval ( " Menu_Name " ) %>
11                       </ td >
12                       < td  width ="7" >
13                           < img  height ="25"  src ="images/Menu/box_topright.gif"  width ="7" >
14                       </ td >
15                   </ tr >
16               </ table >
17               < table  id ="M_<%# Eval(" Menu_ID")% > " style="display: none" cellspacing="0" cellpadding="0"
18                  width="159" align="center" border="0">
19                   < tr >
20                       < td  background ='images/Menu/box_bg.gif'  height ="0px"  width ='159'  colspan ='3' >
21                           < table  width ="157"  border ="0"  cellpadding ="2"  cellspacing ="1" >
22                               < tbody >
23                                   < asp:Repeater  ID ="LeftMenu_Sub"  runat ="server" >
24                                       < ItemTemplate >
25                                           < tr >
26                                               < td  class ="table_none"  onclick ="javascript:NowShow('M_<%# Eval(" Menu_ID")% > ',' <% #  Eval ( " Menu_Url " ) %> ');"
27                                                  onmousemove="javascript:TDOverORIn('M_ <% #  Eval ( " Menu_ID " ) %> ');" onmouseout="javascript:TDOverOROut('M_ <% #  Eval ( " Menu_ID " ) %> ');"
28                                                  id="M_ <% #  Eval ( " Menu_ID " ) %> ">
29                                                   < img  height ='7'  hspace ='5'  src ='images/Menu/arrow.gif'  width ='5'  align ="bottom" >
30                                                   <% #  Eval ( " Menu_Name " ) %>
31                                               </ td >
32                                           </ tr >
33                                       </ ItemTemplate >
34                                   </ asp:Repeater >
35                               </ tbody >
36                           </ table >
37                       </ td >
38                   </ tr >
39               </ table >
40               < table  cellspacing ="0"  cellpadding ="0"  width ="159"  align ="center"  border ="0" >
41                   < tr >
42                       < td  colspan ="3" >
43                           < img  height ='10'  src ='images/Menu/box_bottom.gif'  width ='159' >
44                       </ td >
45                   </ tr >
46               </ table >
47           </ ItemTemplate >
48       </ asp:Repeater >

 

 绑定的方法就是简单的绑定字段

<% #  Eval ( " Menu_ID " ) %>

剩下的那些JS啊CSS啊。不动。只需要动我们要改的东西即可。

根据上节课的知识我们应该知道如何去抄一个菜单了吧？这节里面就不详细说如何去抄了。

其实这个也是我上大二的时候抄袭来的。前天翻资料一下找到了。就分享了。。

 后台

 

 

 

 1    protected   void  Page_Load( object  sender, EventArgs e)
 2          {
 3              BindMenu();
 4          }
 5           #region  "绑定主菜单"
 6           ///   <summary>
 7           ///  绑定主菜单
 8           ///   </summary>
 9           private   void  BindMenu()
10          {
11              LeftMenu.DataSource  =  SqlHelper.ReturnDataTable( " select * from Ziye_Menu where Menu_Fid=0 and Menu_able=1 " , CommandType.Text);
12              LeftMenu.DataBind();
13          }
14           #endregion
15 
16           #region  "绑定子菜单"
17           ///   <summary>
18           ///  绑定子菜单事件
19           ///   </summary>
20           ///   <param name="sender"></param>
21           ///   <param name="e"></param>
22           protected   void  LeftMenu_ItemDataBound( object  sender, RepeaterItemEventArgs e)
23          {
24               int  nParentID  =  Convert.ToInt32(((DataRowView)e.Item.DataItem).Row[ " Menu_ID " ]);
25              Repeater LeftSubID  =  (Repeater)e.Item.FindControl( " LeftMenu_Sub " );
26              LeftSubID.DataSource  =  SqlHelper.ReturnDataTable( " select * from Ziye_Menu where Menu_Fid=' "   +  nParentID  +   " ' " , CommandType.Text); 
27              LeftSubID.DataBind();
28          }
29           #endregion

 

 30行代码

先绑定父的repeater 

绑定之后查找

 

int  nParentID  =  Convert.ToInt32(((DataRowView)e.Item.DataItem).Row[ " Menu_ID " ]);

然后根据这个nparentID来查找子repeater的数据源 在绑定。。

 

就这么简单。。。

 

 接下来我们把上面的分组权限问题阐述一下。

For example:

数据库Users表中

ID      Name    Password     Group     MenuCollection

1        ziye          123            0          1,2,3,4,5,6,9

2        Mini          123            1          1,3,5,6,9,12

 

流程 :

登陆->登陆成功之后->读取信息->判断加载的Group->判断要读取的菜单->加载->显示

 

 

用户1登陆的时候读取他的信息

 

Group为0 那么就加载MenuStyle为0的TR。

进入页面读取菜单页面的时候 就根据MenuCollection来查询用户可以看见的菜单。(select * from menu where MenuID in (1,2,3,4,5,6,9);)

从而达到了一个用户 读取各自的菜单。然后可以在响应页面判断登陆权限结合FORM认证 应该可以满足简单的权限设计。

 

同理用户2登陆的时候 Group为1加载条件为1下面的TR 在读取菜单链表 加载菜单。

 

 

OVER了 第三章我们将结合Nhibernate spring.Net 来抄袭一个国产UI框架.

 

代码在第三节一起放出.