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Step by step, we will teach you how to make a three-level foldable tree menu.

Source: Internet
Author: User
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Thank you for helping me do the test.

 

Demo

[Url = Response

 

Download the required JS and CSS files from my resources.

 

Create Table bbs_panel1 in step 1

Id panelname panelmsg URL

21. development language xx

Table bbs_panel2

 

Id PID panelname panelinfo panelsort URL

1 21 VC/MFC

2 21 VB

 

Table bbs_panel3

 

Id PID ppid panelname panelinfo panelsort URL

1 1 21 basic classes

2 1 21 Interfaces

3 1 21 Network Programming

 

Step 2 nesting Repeater

[Code = HTML]

<Head runat = "server">

<Title> treeleft </title>

<LINK rel = "stylesheet" href = "JS/jquery.treeview.css"/>

<LINK rel = "stylesheet" href = "JS/red-treeview.css"/>

<LINK rel = "stylesheet" href = "JS/screen.css"/>

<SCRIPT src = "JS/jquery. js" type = "text/JavaScript"> </SCRIPT>

<SCRIPT src = "JS/jquery. Cookie. js" type = "text/JavaScript"> </SCRIPT>

<SCRIPT src = "JS/jquery. Treeview. js" type = "text/JavaScript"> </SCRIPT>

<SCRIPT type = "text/JavaScript">

$ (Function (){

$ ("# Tree"). Treeview ({

Collapsed: True,

Animated: "medium ",

Control: "# sidetreecontrol ",

Persist: "location"

});

})

$ (Document). Ready (

Function ()

{

Delclass ();

 

});

Function delclass ()

{

VaR Lis = Document. getelementsbytagname ('lil ');

VaR I;

VaR length;

For (I = 0; I <length; I ++)

{

If (LIS [I]. getelementsbytagname ('ul '). Length = 0)

{

Lis [I]. setattribute ('class ','');

}

}

}

 

</SCRIPT>

</Head>

<Body>

<Div id = "Main"> <a href = "#"> </a>

<Div id = "sidetree">

<Div id = "sidetreecontrol"> <a href = "#"> collapse all </a> | <a href = "#"> Expand All </a> </Div>

<Ul id = "Tree" class = "Treeview">

<Asp: repeater id = "bclass" runat = "server" onitemdatabound = "bclasslist">

<Itemtemplate>

<Li class = "expandable"> <Div class = "hitarea expandable-hitarea"> </div> <a href = "title. aspx? Mode = 1 & id = <% # eval ("ID") %> "target =" Main "> <strong> <% # eval (" menuname ") %> </strong> </a>

<Ul style = "display: none;"> <asp: repeater id = "bsclass" runat = "server" onitemdatabound = "bsclasslist"> <itemtemplate>

<Li class = "expandable"> <a href = "title. aspx? Mode = 2 & id = <% # eval ("PID") %> & pid = <% # eval ("ID ") %> "target =" Main "> <% # eval (" menuname ") %> </a>

<Ul style = "display: none;"> <asp: repeater id = "sclass" runat = "server"> <itemtemplate> <li> <a href = "title. aspx? Mode = 3 & id = <% # eval ("ppid") %> & pid = <% # eval ("PID ") %> & ppid = <% # eval ("ID") %> "target =" Main "> <% # eval (" menuname ") %> </a> </LI>

</Itemtemplate> </ASP: repeater>

</Ul>

</LI>

</Itemtemplate> </ASP: repeater>

</Ul>

</LI>

</Itemtemplate>

</ASP: repeater>

</Ul>

<Br style = "clear: Left"/>

</Div>

</Div>

</Body>

 

[/Code]

 

Step 3 Background

 

[Code = C #]

 

Private string strbbstype = "2 ";

Private string SQL = "";

Protected void page_load (Object sender, eventargs E)

{

If (request. querystring ["bbstype"]! = NULL)

{

Strbbstype = request. querystring ["bbstype"]. tostring ();

}

 

If (! Ispostback)

{

If (strbbstype = "1 ")

{

SQL = "select ID, menuname, URL from m_menuhead where ID> 0 order by ID ";

}

Else

{

SQL = "select ID, panelname as menuname, URL from bbs_panel1 ";

}

 

Dataset RD = new dataset ();

RD = sqlhelper. executedataset (sqlhelper. conn2, commandtype. Text, SQL );

Bclass. datasource = RD;

Bclass. databind ();

}

 

}

Protected void bclasslist (Object sender, repeateritemeventargs E)

{

If (E. Item. itemtype = listitemtype. Item | E. Item. itemtype = listitemtype. alternatingitem)

{

String preid = (datarowview) E. Item. dataitem). Row ["ID"]. tostring (); // obtain the corresponding ID

Repeater bsclass = (repeater) E. Item. findcontrol ("bsclass"); // locate the repeater to bind data

If (bsclass! = NULL)

{

If (strbbstype = "1 ")

{

SQL = "select ID, PID, menuname from m_menuchildren where pid =" + preid + "";

}

Else

{

SQL = "select ID, PID, panelname as menuname from bbs_panel2 where pid =" + preid + "";

}

Dataset SRD = new dataset ();

SRD = sqlhelper. executedataset (sqlhelper. conn2, commandtype. Text, SQL );

Bsclass. datasource = SRD;

Bsclass. databind ();

}

}

}

Protected void bsclasslist (Object sender, repeateritemeventargs E)

{

If (E. Item. itemtype = listitemtype. Item | E. Item. itemtype = listitemtype. alternatingitem)

{

String preid = (datarowview) E. Item. dataitem). Row ["ID"]. tostring (); // obtain the corresponding ID

Repeater sclass = (repeater) E. Item. findcontrol ("sclass"); // locate the repeater to bind data

If (sclass! = NULL)

{If (strbbstype = "1 ")

{

SQL = "select ID, PID, ppid, menuname from m_menuchildren2 where pid =" + preid + "";

}

Else

{

SQL = "select ID, PID, ppid, panelname as menuname from bbs_panel3 where pid =" + preid + "";

}

Dataset SRD = new dataset ();

SRD = sqlhelper. executedataset (sqlhelper. conn2, commandtype. Text, SQL );

// Sqlhelper. conn2 is the database connection character

Sclass. datasource = SRD;

Sclass. databind ();

 

}

}

}

 

[/Code]

 

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