1.建立一个aspx页面
html代码
<
html
xmlns
="http://www.w3.org/1999/xhtml"
>
<
head
id
="Head1"
runat
="server"
>
<
title
>
小山
</
title
>
<
link
type
="text/css"
href
="../../Styles/tree_css/tree.css"
rel
="stylesheet"
>
</
head
>
<
body
>
<
form
id
="Form1"
runat
="server"
>
<
table
width
=100%
cellpadding
=0
cellspacing
=0
border
=0
>
<
colgroup
>
<
col
width
=180
/>
<
col
/>
</
colgroup
>
<
tr
>
<
td
>
<
div
class
="TreeMenu"
id
="CategoryTree"
style
="width: 100%; height: 489px"
>
</
div
>
</
td
>
<
td
>
<
iframe
id
=furl
height
=20
style
="height: 497px; width: 100%;"
></
iframe
>
</
td
>
</
tr
>
</
table
>

<
script
language
="jscript"
>
function el(id)
{
return document.getElementById(id);
}
function ExpandSubCategory(iCategoryID)
{
var li_father = el("li_" + iCategoryID);
if (li_father.getElementsByTagName("li").length > 0) //分类已下载
{
ChangeStatus(iCategoryID);
return;
}
li_father.className = "Opened";
switchNote(iCategoryID, true);
AjaxMethod.GetSubCategory(iCategoryID, GetSubCategory_callback);
}
function GetSubCategory_callback(response)
{
var dt = response.value.Tables[0];
if (dt.Rows.length > 0)
{
var iCategoryID = dt.Rows[0].FatherID;
}
var li_father = el("li_" + iCategoryID);
var ul = document.createElement("ul");
for (var i = 0;i < dt.Rows.length;i++)
{
if (dt.Rows[i].IsChild == 1) //叶子节点
{
var li = document.createElement("li");
li.className = "Child";
li.id = "li_" + dt.Rows[i].CategoryID;
var img = document.createElement("img");
img.id = dt.Rows[i].CategoryID;
img.className = "s";
img.src = "../../Styles/tree_css/s.gif";
var a = document.createElement("a");
var id = dt.Rows[i].CategoryID;
a.onmouseover = function()
{
PreviewImage(id);
};
a.href = "javascript:OpenDocument('" + dt.Rows[i].CategoryID + "');";
a.innerHTML = dt.Rows[i].CategoryName;
}
else
{
var li = document.createElement("li");
li.className = "Closed";
li.id = "li_" + dt.Rows[i].CategoryID;
var img = document.createElement("img");
img.id = dt.Rows[i].CategoryID;
img.className = "s";
img.src = "../../Styles/tree_css/s.gif";
img.onclick = function ()
{
ExpandSubCategory(this.id);
};
img.alt = "展开/折叠";
var a = document.createElement("a");
a.href = "javascript:ExpandSubCategory(" +
dt.Rows[i].CategoryID + ");";
a.innerHTML = dt.Rows[i].CategoryName;
}
li.appendChild(img);
li.appendChild(a);
ul.appendChild(li);
}
li_father.appendChild(ul);
switchNote(iCategoryID, false);
}
// 叶子节点的单击响应函数
function OpenDocument(iCategoryID)
{
// 预加载信息
PreloadFormUrl(iCategoryID);
}
function PreviewImage(iCategoryID)
{
}
function ChangeStatus(iCategoryID)
{
var li_father = el("li_" + iCategoryID);
if (li_father.className == "Closed")
{
li_father.className = "Opened";
}
else
{
li_father.className = "Closed";
}
}
function switchNote(iCategoryID, show)
{
var li_father = el("li_" + iCategoryID);
if (show)
{
var ul = document.createElement("ul");
ul.id = "ul_note_" + iCategoryID;
var note = document.createElement("li");
note.className = "Child";
var img = document.createElement("img");
img.className = "s";
img.src = "../../Styles/tree_css/s.gif";
var a = document.createElement("a");
a.href = "javascript:void(0);";
a.innerHTML = "请稍候
";
note.appendChild(img);
note.appendChild(a);
ul.appendChild(note);
li_father.appendChild(ul);
}
else
{
var ul = el("ul_note_" + iCategoryID);
if (ul)
{
li_father.removeChild(ul);
}
}
}
// 加载根节点
var tree = el("CategoryTree");
var root = document.createElement("li");
root.id = "li_0";
tree.appendChild(root);
// 加载页面时显示第一级分类
ExpandSubCategory(0);
function PreloadFormUrl(iCategoryID)
{
// 采用同步调用的方式获取图片的信息
var ds = AjaxMethod.GetFormsList(iCategoryID).value;
// 如果返回了结果
if (ds)
{
// 判断数据表是否不为空
if (ds.Tables[0].Rows.length > 0)
{
// 返回的信息数据表
dt = ds.Tables[0];
el("furl").src = dt.Rows[0].FormUrl;
}
else // 分类下没有
{
}
}
}
</
script
>
</
form
>
</
body
>
</
html
>
using
System;
using
System.Data;
using
System.Configuration;
using
System.Collections;
using
System.Web;
using
System.Web.Security;
using
System.Web.UI;
using
System.Web.UI.WebControls;
using
System.Web.UI.WebControls.WebParts;
using
System.Web.UI.HtmlControls;
using
AjaxPro;
public
partial
class
Pages_Home_HomePage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Utility.RegisterTypeForAjax(typeof(AjaxMethod));
}
}
a
{
}
{
text-decoration:none;
}
a,a:visited
{
}
{
color:#000;
background:inherit;
}
body
{
}
{
margin:0;
padding:20px;
font:12px tahoma,宋体,sans-serif;
}
dt
{
}
{
font-size:22px;
font-weight:bold;
margin:0 0 0 15px;
}
dd
{
}
{
margin:0 0 0 15px;
}
h4
{
}
{
margin:0;
padding:0;
font-size:18px;
text-align:center;
}
p
{
}
{
margin:0;
padding:0 0 0 18px;
}
p a,p a:visited
{
}
{
color:#00f;
background:inherit;
}

.TreeMenu img.s
{
}
{
cursor:hand;
vertical-align:middle;
}
.TreeMenu ul
{
}
{
padding:0;
}
.TreeMenu li
{
}
{
list-style:none;
padding:0;
}
.Closed ul
{
}
{
display:none;
}
.Child img.s
{
}
{
background:none;
cursor:default;
}

#CategoryTree ul
{
}
{
margin:0 0 0 17px;
}
#CategoryTree img.s
{
}
{
width:34px;
height:18px;
}
#CategoryTree .Opened img.s
{
}
{
background:url(skin3/opened.gif) no-repeat 0 1px;
}
#CategoryTree .Closed img.s
{
}
{
background:url(skin3/closed.gif) no-repeat 0 1px;
}
#CategoryTree .Child img.s
{
}
{
background:url(skin3/child.gif) no-repeat 13px 2px;
}

#CategoryTree
{
}
{
float:left;
width:249px;
border:1px solid #99BEEF;
background:#D2E4FC;
color:inherit;
margin:3px;
padding:3px;
height:600px;
}
using
System;
using
System.Data;
using
System.Data.SqlClient;
using
System.Configuration;
using
System.Web;
using
System.Web.Security;
using
System.Web.UI;
using
System.Web.UI.WebControls;
using
System.Web.UI.WebControls.WebParts;
using
System.Web.UI.HtmlControls;
using
AjaxPro;

/**/
/// <summary>
/// Summary description for AjaxMethod
/// </summary>
public
class
AjaxMethod
{}
{
public AjaxMethod()
{
//
// TODO: Add constructor logic here
//
}
[AjaxMethod(HttpSessionStateRequirement.ReadWrite)]
public static DataSet GetSubCategory(int iCategoryID)
{}
{
string sql = string.Format("SELECT CategoryID, CategoryName, FatherID, dbo.IsLeaf(CategoryID) as IsChild FROM Category WHERE FatherID = {0}", iCategoryID);
return GetDataSet(sql);
}
[AjaxMethod(HttpSessionStateRequirement.ReadWrite)]
public static DataSet GetFormsList(int iCategoryID)
{}
{
string sql = string.Format("SELECT * FROM forms WHERE form_category_id = {0}", iCategoryID);
return GetDataSet(sql);
}
public static string ConnectionString = ConfigurationSettings.AppSettings["ConnectionString"].ToString();
public static DataSet GetDataSet(string sql)
{}
{
SqlDataAdapter sda = new SqlDataAdapter(sql, ConnectionString);
DataSet ds = new DataSet();
sda.Fill(ds);
if (ds != null)
return ds;
else
return null;
}
}
if
exists
(
select
*
from
dbo.sysobjects
where
id
=
object_id
(N
'
[dbo].[Category]
'
)
and
OBJECTPROPERTY
(id, N
'
IsUserTable
'
)
=
1
)
drop
table
[
dbo
]
.
[
Category
]
GO

if
exists
(
select
*
from
dbo.sysobjects
where
id
=
object_id
(N
'
[dbo].[Forms]
'
)
and
OBJECTPROPERTY
(id, N
'
IsUserTable
'
)
=
1
)
drop
table
[
dbo
]
.
[
Forms
]
GO

CREATE
TABLE
[
dbo
]
.
[
Category
]
(
[
CategoryID
]
[
int
]
IDENTITY
(
1
,
1
)
NOT
NULL
,
[
CategoryName
]
[
varchar
]
(
20
) COLLATE Chinese_PRC_CI_AS
NULL
,
[
FatherID
]
[
int
]
NULL
)
ON
[
PRIMARY
]
GO

CREATE
TABLE
[
dbo
]
.
[
Forms
]
(
[
FormID
]
[
int
]
IDENTITY
(
1
,
1
)
NOT
NULL
,
[
FormName
]
[
nvarchar
]
(
50
) COLLATE Chinese_PRC_CI_AS
NULL
,
[
FormUrl
]
[
nvarchar
]
(
50
) COLLATE Chinese_PRC_CI_AS
NULL
,
[
Form_category_id
]
[
int
]
NULL
,
[
target
]
[
char
]
(
10
) COLLATE Chinese_PRC_CI_AS
NULL
)
ON
[
PRIMARY
]
GO
CREATE
FUNCTION
IsLeaf (
@cat_id
int
)
RETURNS
int
AS
BEGIN

declare
@count
int
select
@count
=
(
select
count
(
*
)
from
Category
where
FatherID
=
@cat_id
)
if
(
@count
=
0
)
return
1
return
0

END
1067





