asp.net 用XML生成放便扩展的自定义树_asp.net教程-查字典教程网

摘要：数据源为XML，因此放便扩展。废话不多说，直接上代码（因一些原因，把部分数据修改或精简了）。XML代码：复制代码代码如下:程序代码：复制代码...

数据源为XML，因此放便扩展。

废话不多说，直接上代码（因一些原因，把部分数据修改或精简了）。

XML代码：

复制代码代码如下:

<?xml version="1.0" encoding="utf-8" ?>

</Menu>

</Menu>

</Menu>

</Menu>

</Module>

</Module>

</Module>

</Module>

</MenuData>

程序代码：

复制代码代码如下:

using System.Text;

using System.Collections;

using System.Xml;

using System.Web;

using System;

/// <summary>

/// CreateTree 的摘要说明

/// </summary>

public class MenuTree

{

int index = 0;//菜单栏目ID索引

private ArrayList havePermission = new ArrayList();

private bool isVip = false;

/// <summary>

/// 登录用户所拥有的权限

/// </summary>

private ArrayList HavePermissions

{

get { return havePermission; }

set { havePermission = value; }

}

/// <summary>

/// 登录用户是否是VIP

/// </summary>

private bool IsVip

{

get { return isVip; }

set { isVip = value; }

}

/// <summary>

/// 登录用户所拥有的权限是否为VIP用户

/// </summary>

/// <param name="havePermission"></param>

/// <param name="isVip"></param>

public MenuTree(ArrayList havePermission, bool isVip)

{

this.HavePermissions = havePermission;

this.IsVip = isVip;

}

/// <summary>

/// 绑定树

/// </summary>

public string BindDataToTree()

{

System.Xml.XmlDocument document = new System.Xml.XmlDataDocument();

document.Load(HttpContext.Current.Server.MapPath("MenuData.xml"));

return CreateTreeHtml(document.DocumentElement, 0);

}

/// <summary>

/// 创建栏目树

/// </summary>

/// <param name="document">xml节点</param>

/// <param name="deep">树深度</param>

private string CreateTreeHtml(System.Xml.XmlNode document, int deep)

{

string nodeType = "Menu";//节点的类型，来生成子节点的CSS类型

StringBuilder treeHtml = new StringBuilder();

foreach (System.Xml.XmlNode node in document.ChildNodes)

{

string menuId = string.Empty;

string treeNodeHtml = string.Empty;

string nodeName = node.Name;

string showName = GetAttributesValue(node.Attributes["Name"]);//显示栏目名

string nodeId = GetAttributesValue(node.Attributes["Id"]);//栏目ID

bool isExpand = GetAttributesValue(node.Attributes["IsExpand"]).ToLower().Trim() == "true" ? true : false;//是否展开

string permissions = GetAttributesValue(node.Attributes["Permissions"]);//权限字串

bool isOnlyVip = GetAttributesValue(node.Attributes["IsOnlyVip"]).ToLower().Trim() == "true" ? true : false;//是否只允许VIP访问

bool isUnVip = GetAttributesValue(node.Attributes["IsUnVip"]).ToLower().Trim() == "true" ? true : false;//是否只准非VIP访问

string eventScript = GetAttributesValue(node.Attributes["EventScript"]);//事件脚本

int chlidNodesCount = node.ChildNodes.Count;//子节点数

bool isPermissions = GetIsPermissions(permissions);//是否有权限

if (!isPermissions)

{

continue; //如果没有权限，不生成此节点

}

if (nodeName == "Module")

{

if (isUnVip && IsVip)

{

continue;//如果为VIP会员设为不允许访问子栏目

}

menuId = GetMenuId(nodeId);

treeHtml.AppendFormat("<div id='Menu{0}' onclick='DoNodes(this);{1}' onselectstart='return false;'>", menuId, eventScript);

treeHtml.Append("<img src='http://www.jb51.netimages/sideMenuIcon.gif' alt='' />");

treeHtml.AppendFormat("<span>{0}</span>", showName);

treeHtml.Append("</div>");

deep = 0;

nodeType = "Module";

}

else

{

treeHtml.Append("<table cellpadding='0' cellspacing='0'>");

treeHtml.Append("<tr>");

for (int i = 0; i < deep; i++)

{

if (i == deep - 1)

{

treeHtml.Append("<td>");

if (chlidNodesCount > 0)

{

menuId = GetMenuId(nodeId);

treeHtml.AppendFormat("<a id='Menu{0}' href='javascript:;' onclick='DoNodes(this,"menu")'><img src='http://www.jb51.netImages/{1}.gif' alt=''/></a>", menuId, (isExpand ? "open-menu" : "close-menu"));

}

else

{

treeHtml.Append("<img src='http://www.jb51.netImages/open-menuno.gif' alt=''/>");

}

treeHtml.Append("</td>");

}

else

{

treeHtml.Append("<td></td>");

}

string url = GetAttributesValue(node.Attributes["Url"]); //链接地址

string title = GetAttributesValue(node.Attributes["Title"]);//链接TITLE信息

string menuNodeId = nodeId.Trim().Length > 0 ? "id='MenuNode" + nodeId + "'" : string.Empty;//树节点ID

treeHtml.Append("<td>");

if (url.Length > 0 || chlidNodesCount == 0)

{

if (!isOnlyVip || (isOnlyVip && IsVip))//栏目是否只为VIP开放

{

if (url.Length > 0)

{

treeHtml.AppendFormat("<a href='{0}' target='MainFrame' title='{1}' {3} {4}>{2}</a>", url, title, showName, eventScript, menuNodeId);

}

else

{

treeHtml.AppendFormat("<a href='javascript:;' target='MainFrame' title='{0}' {2} {3}>{1}</a>", title, showName, eventScript, menuNodeId);

}

else

{

treeHtml.AppendFormat("<a href='javascript:;' target='MainFrame' title='{1}' onclick='return AlertVip();' {3}>{2}</a>", url, title, showName, menuNodeId);

}

else

{

treeHtml.AppendFormat("<a href='javascript:;' onclick='DoAClick("Menu{0}");' title='{1}' {3} {4}>{2}</a>", menuId, title, showName, eventScript, menuNodeId);

}

treeHtml.Append("</td>");

treeHtml.Append("</tr>");

treeHtml.Append("</table>");

}

if (chlidNodesCount > 0)

{

treeNodeHtml = CreateTreeHtml(node, deep + 1);

}

if (treeNodeHtml.Length > 0)

{

treeHtml.AppendFormat("<div id='Menu{0}Nodes' {1}>", menuId, (nodeType == "Module" ? "class='Menus'" : "class='MenuNodes'"), (isExpand ? "display:block;" : "display: none;"));

treeHtml.Append(treeNodeHtml);

treeHtml.Append("</div>");

}

return treeHtml.ToString();

}

/// <summary>

/// 取得栏目的ID

/// </summary>

private string GetMenuId(string nodeId)

{

return nodeId.Length > 0 ? nodeId : Convert.ToString(++index);

}

/// <summary>

/// 取得节点值

/// </summary>

private string GetAttributesValue(XmlAttribute attributeValue)

{

return attributeValue == null ? "" : attributeValue.Value.Trim();

}

/// <summary>

/// 是否有权限

/// </summary>

private bool GetIsPermissions(string permissions)

{

if (HavePermissions.Count == 0)

{

return false;

}

if (permissions.Length == 0)

{

return true;

}

else

{

string[] arrPermissions = permissions.Split(',');

for (int i = 0; i < arrPermissions.Length; i++)

{

if (HavePermissions.Contains(arrPermissions[i].Trim()))

{

return true;

}

return false;

}