C#遞歸讀取XML菜單數據的方法

2020-01-24 02:13:49

字體：大中小

來源：轉載

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本文實例講述了C#遞歸讀取XML菜單數據的方法。分享給大家供大家參考。具體分析如下：

最近在研究一些關于C#的一些技術，縱觀之前的開發項目的經驗，做系統時顯示系統菜單的功能總是喜歡把數據寫在數據庫表，然后直接讀取加載到菜單樹上顯示。

現在想把菜單數據都放在XML里，然后遞歸讀取XML。

由于項目使用WCF，實體類使用了兩個，一個是業務邏輯層中的實體，一個是調用業務邏輯層遞歸方法后進行數據實體的轉換，XML讀取方法寫在業務邏輯層中。

思路：

1.先讀取XML里所有的菜單

2.根據用戶的權限顯示所屬用戶的菜單加載到頁面上

XML數據如下：

復制代碼代碼如下:

<?xml version="1.0" encoding="utf-8"?>
<ZCSoft.Net xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   <Applications>
      <Application ID ="OA" Text="OA管理系統">
        <Modules>
          <Module ID="OA_System" Text="系統管理">
            <Menus>
         　　　<Menu ID="OA_System_UserManager" Text="人員管理" URL="System/UserManager/UserManagerList.aspx"> </Menu>
              <Menu ID="OA_System_RoleManager" Text="角色管理" URL="System/RoleManager/RoleManagerList.aspx"></Menu>
              <Menu ID="OA_System_LoginLog" Text="登錄日志" URL="System/Log/LoginLogList.aspx"></Menu>
          　　<Menu ID="OA_System_OperateLog" Text="操作日志" URL="System/Log/OperateLogList.aspx"></Menu>
            </Menus>
          </Module>

菜單的業務邏輯實體類：

復制代碼代碼如下:

public class MenuTreeSearchModel
{
//菜單ID
public string ItemCode { get; set; }

//菜單名稱
public string ItemName { get; set; }

//菜單顯示類型
public string ItemType { get; set; }

//排序
public int ItemOrder { get; set; }

//是否顯示
public bool Visible { get; set; }

//菜單鏈接
public string ItemUrl { get; set; }

//上級ID
public string ParentItem { get; set; }

//系統平臺ID
public string ApplicationCode { get; set; }

//系統平臺名稱
public string ApplicationName { get; set; }

//模塊ID
public string ModuleCode { get; set; }

//模塊名稱
public string ModuleName { get; set; }
}

遞歸方法，讀取每個模塊和模塊下的菜單：

復制代碼代碼如下:

protected void GetChildMenuList(XElement root, List<MenuTreeSearchModel> menuTreeList)
{
    var firstNode = root.FirstNode as XElement;//讀取root節點內的第一個節點
    if (null != firstNode)
    {
//讀取root節點下面同級的所有節點
var appList =
  from ele in root.Element(firstNode.Name.LocalName).Elements()
  select ele;

bool thisVisible = true;//默認節點是可見的
XAttribute thisAttr = root.Attribute("Display");
if (null != thisAttr)//如果菜單的上級模塊有顯示屬性
{
string thisDisplay = thisAttr.Value;
thisVisible = thisDisplay.ToLower() == "false" ? false : true;
}

foreach (var application in appList)
{
     //模塊Display屬性
     XAttribute modAttr = application.Attribute("Display");
     bool visible = true;
     if (null != modAttr)
     {
  string display = application.Attribute("Display").Value;
  visible = display.ToLower() == "false" ? false : true;
     }
     var nextNode = application.FirstNode as XElement;//該節點的下級節點

     string itemType = "Folder";//目錄還是菜單
     string itemUrl = null;//鏈接地址
     string parentItem = null;//上一節點ID
     string applicationCode = null;//平臺編碼
     string applicationName = null;//平臺名稱
     string moduleCode = null;//模塊編碼
     string moduleName = null;//模塊名稱

     if (application.Name.LocalName == "Application")
     {
  applicationCode = application.Attribute("ID").Value;
  applicationName = application.Attribute("Text").Value;
     }

     if (application.Name.LocalName == "Module")
     {
  moduleCode = application.Attribute("ID").Value;
  moduleName = application.Attribute("Text").Value;
  applicationCode = root.Attribute("ID").Value;
  applicationName = root.Attribute("Text").Value;

  if (thisVisible) //如果該模塊的所屬平臺中的Display屬性設置為可見true（注意：沒有設置則默認為可見），則模塊的上級為Application的ID
  {
      parentItem = root.Attribute("ID").Value;
  }
     }

     if (application.Name.LocalName == "Menu")
     {
  itemType = "Menu";
  itemUrl = application.Attribute("URL").Value;
  moduleCode = root.Attribute("ID").Value;
  moduleName = root.Attribute("Text").Value;
  applicationCode = root.Parent.Parent.Attribute("ID").Value;
  applicationName = root.Parent.Parent.Attribute("Text").Value;

  if (thisVisible) //如果該菜單的所屬模塊中的Display屬性設置為可見true（注意：沒有設置則默認為可見），則菜單的上級為Module的ID
  {
      parentItem = root.Attribute("ID").Value;
  }
  else//如果該菜單的所屬模塊中的Display屬性設置為不可見false，則菜單的上級為Application的ID
  {
      parentItem = root.Parent.Parent.Attribute("ID").Value;
  }
     }

     MenuTreeSearchModel model = new MenuTreeSearchModel();
     model.ItemCode = application.Attribute("ID").Value;
     model.ItemName = application.Attribute("Text").Value;
     model.ItemType = itemType;
     model.ItemOrder = 0;
     model.Visible = visible;
     model.ItemUrl = itemUrl;
     model.ParentItem = parentItem;
     model.ApplicationCode = applicationCode;
     model.ApplicationName = applicationName;
     model.ModuleCode = moduleCode;
     model.ModuleName = moduleName;
     menuTreeList.Add(model);

     if (null != nextNode)//如果還有下級節點
     {
     　　　　　　　　//調用遞歸
   GetChildMenuList(application, menuTreeList);
     }
}
    }
}

從XML文檔讀?。?/p>

復制代碼代碼如下:

/// <summary>
/// 從XML文件讀取菜單節點
/// </summary>
/// <returns></returns>
public List<MenuTreeSearchModel> GetMenuTreeByReadXML()
{
    List<MenuTreeSearchModel> list = new List<MenuTreeSearchModel>();
//讀取XML文檔路徑，這里我把XML放在網站的bin目錄里
    string xmlPath = AppDomain.CurrentDomain.BaseDirectory + "Foundation.xml";
    XElement root = XElement.Load(xmlPath);
    var appList =
  from ele in root.Element("Applications").Elements()
  select ele;
//按系統平臺篩選
    foreach (var application in appList)
    {
MenuTreeSearchModel model = new MenuTreeSearchModel();
model.ItemCode = application.Attribute("ID").Value;
model.ItemName = application.Attribute("Text").Value;
model.ItemType = "Folder";
model.ItemOrder = 0;
model.Visible = true;
model.ItemUrl = null;
model.ParentItem = null;
model.ApplicationCode = application.Attribute("ID").Value;
model.ApplicationName = application.Attribute("Text").Value;
model.ModuleCode = null;
model.ModuleName = null;
list.Add(model);

//遞歸調用
GetChildMenuList(application, list);

}

return list;
}

以下是在調用服務契約方法時進行的實體類：

復制代碼代碼如下:

public class PublicUserMenuTreeData
{
//菜單ID
public string ItemCode { get; set; }

//菜單名稱
public string ItemName { get; set; }

//菜單顯示類型
public string ItemType { get; set; }

//排序
public int ItemOrder { get; set; }

//是否顯示
public bool Visible { get; set; }

//菜單鏈接
public string ItemUrl { get; set; }

//上級ID
public string ParentItem { get; set; }

//系統平臺ID
public string ApplicationCode { get; set; }

//系統平臺名稱
public string ApplicationName { get; set; }

//模塊ID
public string ModuleCode { get; set; }

    //模塊名稱
        public string ModuleName { get; set; }
    //當前菜單下的菜單集合
    public List<PublicUserMenuTreeData> UserMenuTreeDatas { set; get; }
}

實體轉換方法：

復制代碼代碼如下:

public PublicUserMenuTreeData TransferUserMenuTreeToPublicUserMenu(MenuTreeData userMenuTreeData)
{
    PublicUserMenuTreeData pubUserMenuTreeData = new PublicUserMenuTreeData();
    pubUserMenuTreeData.ItemCode = userMenuTreeData.ItemCode;
    pubUserMenuTreeData.ItemName = userMenuTreeData.ItemName;
    pubUserMenuTreeData.ItemType = userMenuTreeData.ItemType;
    pubUserMenuTreeData.ItemOrder = userMenuTreeData.ItemOrder;
    pubUserMenuTreeData.Visible = userMenuTreeData.Visible;
    pubUserMenuTreeData.ItemUrl = userMenuTreeData.ItemUrl;
    pubUserMenuTreeData.ParentItem = userMenuTreeData.ParentItem;
    pubUserMenuTreeData.ApplicationCode = userMenuTreeData.ApplicationCode;
    pubUserMenuTreeData.ApplicationName = userMenuTreeData.ApplicationName;
    pubUserMenuTreeData.ModuleCode = userMenuTreeData.ModuleCode;
    pubUserMenuTreeData.ModuleName = userMenuTreeData.ModuleName;
    return pubUserMenuTreeData;
}

用戶權限菜單方法：

復制代碼代碼如下:

/// <summary>
/// 有用戶權限樹獲取共用的用戶菜單列表
/// </summary>
/// <param name="listAllUserMenu"></param>
/// <returns></returns>
public List<PublicUserMenuTreeData> GetPublicUserMenuFromUserMenuTreeData(List<MenuTreeData> listAllUserMenu)
{
    List<PublicUserMenuTreeData> listPublicUserMenuTreeData = new List<PublicUserMenuTreeData>();
    List<MenuTreeData> list = listAllUserMenu.FindAll(d => string.IsNullOrEmpty(d.ParentItem)).ToList();
    foreach (var userMenuTreeData in list)
    {
PublicUserMenuTreeData pubUserMenuTreeData = TransferUserMenuTreeToPublicUserMenu(userMenuTreeData);
pubUserMenuTreeData.UserMenuTreeDatas = GetChildData(pubUserMenuTreeData.ItemCode, listAllUserMenu);
listPublicUserMenuTreeData.Add(pubUserMenuTreeData);
    }
    return listPublicUserMenuTreeData;
}
public List<PublicUserMenuTreeData> GetChildData(string parentId, List<MenuTreeData> listUserMenuTreeData)
{

    List<MenuTreeData> list = listUserMenuTreeData.FindAll(d => d.ParentItem == parentId).ToList();
    if (list.Count > 0)
    {
List<PublicUserMenuTreeData> listPublicUserMenuTreeData = new List<PublicUserMenuTreeData>();
foreach (var userMenuTreeData in list)
{
     PublicUserMenuTreeData pubUserMenuTreeData = TransferUserMenuTreeToPublicUserMenu(userMenuTreeData);
     pubUserMenuTreeData.UserMenuTreeDatas = GetChildData(pubUserMenuTreeData.ItemCode, listUserMenuTreeData);
     listPublicUserMenuTreeData.Add(pubUserMenuTreeData);
}
return listPublicUserMenuTreeData;
    }
    return null;
}

系統菜單類：

復制代碼代碼如下:

/// <summary>
/// 系統菜單
/// </summary>
[DataContract()]
public class MenuTreeData
{

[DataMember()]
public string ItemCode { get; set; }

[DataMember()]
public string ItemName { get; set; }

[DataMember()]
public string ItemType { get; set; }

[DataMember()]
public int ItemOrder { get; set; }

[DataMember()]
public bool Visible { get; set; }

[DataMember()]
public string ItemUrl { get; set; }

[DataMember()]
public string ParentItem { get; set; }

[DataMember()]
public string ApplicationCode { get; set; }

[DataMember()]
public string ApplicationName { get; set; }

[DataMember()]
public string ModuleCode { get; set; }

[DataMember()]
public string ModuleName { get; set; }

}

后臺頁面加載Load代碼：

復制代碼代碼如下:

string menuData = string.Empty;
 
var treeList= GetMenuTreeList();
if (treeList!= null)
{
         List<MenuTreeData> listAllUserMenu = treeList.FindAll(d => d.Visible).OrderBy(d => d.ItemOrder).ToList();
         List<PublicUserMenuTreeData> listPublicUserMenuTreeData = GetPublicUserMenuFromUserMenuTreeData(listAllUserMenu);
          menuData = JsonConvert.SerializeObject(listPublicUserMenuTreeData);
}

頁面加載腳本，這里使用Jquery：

復制代碼代碼如下:

var obj = menuData;
GetMenuInfo(obj);
function GetMenuInfo(obj) {
    var str = "";

    var objInfo = "";
    if (obj) {
objInfo = obj.split("|");
if (objInfo[0] != "") {
     var PublicUserMenuTreeData = JSON.parse(objInfo[0]);
     for (var i = 0; i < PublicUserMenuTreeData.length; i++) {
  str += ("<li>");
  var tempmenu= PublicUserMenuTreeData[i];
  if (tempmenu.ItemType && tempmenu.ItemType == "Menu") {
      str += ("<a href='#' onclick='" + tempmenu.ItemCode + "()' id='" + tempmenu.ItemCode + "'>" + tempmenu.ItemName + "</a>");
      str += ("<script> function " + tempmenu.ItemCode);
      str += ("() { tabframe1.newTab({ title: '" + tempmenu.ItemName + "',");
      if (tempmenu.ItemUrl.indexOf('?') != -1) {
   str += ("src: '" + tempmenu.ItemUrl + "&applicationid=" + tempmenu.ApplicationCode + "&moduleid=" + tempmenu.ModuleCode + "',");
      } else {
   str += ("src: '" + tempmenu.ItemUrl + "?applicationid=" + tempmenu.ApplicationCode + "&moduleid=" + tempmenu.ModuleCode + "',");
      }

      str += (" id: 'oa-system-" + tempmenu.ItemCode + "',");
      str += (" closable: true }); jQuery('#mainmenulist').hide(); return false; }<//script>");
  } else {
      str += ("<a href='#' id='" + PublicUserMenuTreeData[i].ItemCode + "'>" + PublicUserMenuTreeData[i].ItemName + "</a>");
  }

  if (PublicUserMenuTreeData[i].UserMenuTreeDatas) {
      str += GetRecurrenceData(PublicUserMenuTreeData[i].UserMenuTreeDatas);
  }
  str += (" </li>");
     }
}
    }

    function GetRecurrenceData(listPublicUserMenuTreeData) {
    var str = "";
    if (listPublicUserMenuTreeData && listPublicUserMenuTreeData.length>0) {
str += (" <ul>");
for (var j = 0; j < listPublicUserMenuTreeData.length; j++) {
     str += ("<li class='divFontWeight'>");
     if (listPublicUserMenuTreeData[j].ItemType && listPublicUserMenuTreeData[j].ItemType == "Menu") {
  str += ("<a href='#' onclick='" + listPublicUserMenuTreeData[j].ItemCode + "()' id='" + listPublicUserMenuTreeData[j].ItemCode + "'>" + listPublicUserMenuTreeData[j].ItemName + "</a>");
  str += ("<script> function " + listPublicUserMenuTreeData[j].ItemCode);
  str += ("() { tabframe1.newTab({ title: '" + listPublicUserMenuTreeData[j].ItemName + "',");
  if (listPublicUserMenuTreeData[j].ItemUrl.indexOf('?') != -1) {
      str += ("src: '" + listPublicUserMenuTreeData[j].ItemUrl + "&applicationid=" + listPublicUserMenuTreeData[j].ApplicationCode + "&moduleid=" + listPublicUserMenuTreeData[j].ModuleCode + "',");
  } else {
      str += ("src: '" + listPublicUserMenuTreeData[j].ItemUrl + "?applicationid=" + listPublicUserMenuTreeData[j].ApplicationCode + "&moduleid=" + listPublicUserMenuTreeData[j].ModuleCode + "',");
  }

  str += (" id: 'oa-system-" + listPublicUserMenuTreeData[j].ItemCode + "',");
  str += (" closable: true }); jQuery('#mainmenulist').hide(); return false; }<//script>");
     } else {
  str += ("<a href='#' id='" + listPublicUserMenuTreeData[j].ItemCode + "'>" + listPublicUserMenuTreeData[j].ItemName + "</a>");
     }

var ListMenuDatas = listPublicUserMenuTreeData[j].UserMenuTreeDatas;
str += GetRecurrenceData(ListMenuDatas);

     str += ("</li>");
}
str += (" </ul>");
    }
    return str;
}

效果圖：