asp.net2.0 TreeView實現權限樹

   現在很多流行的bs系統中，不可缺少的就是權限的管理，普遍的做法是做成一個權限的樹，對樹的節點權限進行操作，使權限一目瞭然。這裏簡單介紹一個對樹的增，刪，改的實現。具體要細化當然要視自己的情況需要阿。中間有用到，實現比較粗糙。意在說明思路而已。看看提供的數據源。        

實現的簡單效果：                     

下面有三個按鈕對其進行操作：增加，編輯，刪除。

                   

主要實現代碼：

db.cs

1.----自己大概寫：

public class RetriveDataII
{
    private static RetriveData RetriveDataobj = null;
    const string strcon = "Data Source=STONE_HEGUANGGZ;Initial Catalog=UNote;User ID=sa;Password=sa";
    private string SQL="select * from UNOTE_Menu";

    DataSet ds = new DataSet();
    public RetriveDataII(){}
    public RetriveDataII(string SQL)
    {
         this.SQL = SQL;
    }

    public DataSet getData()
    {
        using (SqlConnection con = new SqlConnection(strcon))
        {
            con.Open();
            SqlDataAdapter da = new SqlDataAdapter(SQL, con);
            da.Fill(ds);
            return ds;
        }
    }
    public int ExcuteDB(string SQL)
    {
        using (SqlConnection con = new SqlConnection(strcon))
        {
            con.Open();
            SqlCommand cm = new SqlCommand(SQL,con);
            return cm.ExecuteNonQuery();
        }
    }
}
2.-----調用Enterprise Library 3.1

public class RetriveData
{

    private static RetriveData RetriveDataobj = null;
    private string SQL;
    private RetriveData()
    {
         SQL = "select * from UNOTE_Menu";
    }

    public static RetriveData CreateOject()
    {
        if (RetriveDataobj == null)
        {
            RetriveDataobj = new RetriveData();
            return RetriveDataobj;
        }
        else
            return RetriveDataobj;
    }

    public DataSet RetriveDB()   
    {

        Database db = DatabaseFactory.CreateDatabase("UNOTE");
       
        return db.ExecuteDataSet(CommandType.Text,SQL);
    }

   
}

Treeview的生成：

    public void intialTree(TreeNodeCollection trNode,string parentID)
    {
        DataView dv=new DataView();
        //-----singlton----
        //RetriveData rd = RetriveData.CreateOject();
        //------------------
        //------normal--------
        RetriveDataII rd = new RetriveDataII();
        TreeNode tmpNd;
        string intId;
        const string CLICK_TV_ITEM = "<a style='cursor:hand;' onclick=/"javascript:HandlTreeValue({0},'{1}');/">{1}</a>";
        //-----singlton----
        //dv.Table = rd.RetriveDB().Tables[0];
        //--------------------

        //-----normal------------
        dv.Table = rd.getData().Tables[0];
        dv.RowFilter = "ParentId=" + parentID;
        foreach(DataRowView drv in dv)
        {
            tmpNd=new TreeNode();
            tmpNd.Value=drv["NodeId"].ToString();
            //tmpNd.Text=drv["NodeName"].ToString();
            tmpNd.Text = string.Format(CLICK_TV_ITEM, drv["NodeId"].ToString(),drv["NodeName"].ToString());
            //tmpNd.ImageUrl="../webimages/"+drv["Icon"].ToString();
            //tmpNd.NavigateUrl="../"+drv["Address"].ToString();
            trNode.Add(tmpNd);
            intId=drv["ParentId"].ToString();
            intialTree(tmpNd.ChildNodes, tmpNd.Value);
        }

    }

  主要的js

    function HandlTreeValue(a,b)
    {
      //alert(a+'|||'+b);
      document.getElementById('trnID').value=a;
      document.getElementById('trnText').value=b;    
     
    }
   
    function Add(type)
    {
      var returnvalue;
      var objID=document.getElementById('trnID');
      var objText=document.getElementById('trnText');
      //alert(objID+'||'+objText);
      var strURL="ModifyTree.aspx?type="+type+"&NodeID="+objID.value+"&NodeText="+objText.value;
      //alert(strURL);
      var strMode='dialogHeight:400px;dialogWidth:820px;scroll:no;center:yes; status:no;help:no';     
      if((objID=='undefined')||(objText=='undefined')) return false;
     
      if(type=='A')
      {
         returnvalue = window.showModalDialog(strURL,"",strMode);
         if(returnvalue=="" || returnvalue=="undefined")
        {
          window.close();
        }
         return true;
      }
        //window.open('AA100050.aspx?proCode='+proCode,str1,str2);
      if(type=='M')
      {
           
            if((objID.value.length==0)||(objText.value.length==0))
            {
              alert('請點選節點！');
              return false;
            }
            returnvalue = window.showModalDialog(strURL,"",strMode);
            if(returnvalue=="" || returnvalue=="undefined")
            {
              window.close();
            }
            return true;
      }
      if(type=='D')
      {
       
        if((objID.value.length==0)||(objText.value.length==0))
        {
          alert('請點選節點！');
          return false;
        }
        else
        {
        
         alert(type);
         return ComfirmDel();
        }
       }    
    }

  function winClose()
  {
     window.close();
     return false;
  }
 
 
  //生成xmlHttp對象
function fn_getXmlHttpRequest()
{
 var A=null;
 try
 {
  A=new ActiveXObject("Msxml2.XMLHTTP");//initialize a xmlhttp object
 }
 catch(e)
 {
  try
  {
   A=new ActiveXObject("Microsoft.XMLHTTP");
  }
  catch(oc)
  {
   A=null;
  }
 }

 if (!A && typeof XMLHttpRequest != "undefined" )
 {
     A=new XMLHttpRequest()
 }
 return A
}

function DeleteRootXX()
{
   var xmlHttp=fn_getXmlHttpRequest();
   var objID=document.getElementById('trnID');
   var objText=document.getElementById('trnText');
  
   var URL="Default.aspx?IsAjax=Y"+"&ajaxId="+objID.value+"&ajaxName="+escape(objText.value)+"&CacheFresh=" + Math.random();
   xmlHttp.open("get",URL,false);
   xmlHttp.send(null);
   var result = xmlHttp.responseText;
   //alert(result);  
   if(result!="NO" && result!="&&&")
   {
      if(result == 'HAD')
        return true;
      else
        return false;
   }
   else
   {
     return false;
   }
}

function ComfirmDel()
{
  if(!DeleteRootXX())
  {
    //alert('CCCCCCCCCCC');
    return true;
  }
  else
  {
     //alert('DDDDDDDD');
    if(confirm('該節點包括子節點，是否刪除！'))
        return true;
    else
        return false;
  }
}

新增，編輯，刪除等的操作。

  protected void btnDelete_Click(object sender, EventArgs e)
    {
        try
        {
            string strID = this.trnID.Value.Trim();
            string strText = this.trnText.Value.Trim();
            if ((strID.Length == 0) || (strText.Length == 0)) return;
            string strDel = "delete from UNOTE_Menu where NodeId='" + strID + "' or ParentId='" + strID + "'";
            Response.Write(strDel);
            RetriveDataII rd = new RetriveDataII();
            int i=rd.ExcuteDB(strDel);
            if (i > 0)
            {
                this.TreeView1.Nodes.Clear();
                intialTree(this.TreeView1.Nodes, "0");
            }
        }
        catch { }

    }
    protected void btnModify_Click(object sender, EventArgs e)
    {
        this.TreeView1.Nodes.Clear();
        intialTree(this.TreeView1.Nodes, "0");
    }
    protected void btnAdd_Click(object sender, EventArgs e)
    {
        this.TreeView1.Nodes.Clear();
        intialTree(this.TreeView1.Nodes, "0");
    }

Ajax檢測是否有子節點：

public void CHK_Data(string nodeId,string nodeName)
    {
        string strResult = "";
        try
        {
            string strQuery = "select * from UNOTE_Menu where";
            strQuery += "   ParentId='" + nodeId + "'";
            RetriveDataII rd = new RetriveDataII(strQuery);
            DataSet ds = rd.getData();
            if (ds.Tables[0].Rows.Count > 0)
            {
                strResult = "HAD";
                Response.Clear();
                Response.Write(strResult);
                Response.Flush();
                Response.Close();
            }
            else
            {
                strResult = "NO";
                Response.Clear();
                Response.Write(strResult);
                Response.Flush();
                Response.Close();
            }
        }
        catch
        {
            strResult = "&&&";
            Response.Clear();
            Response.Write(strResult);
            Response.Flush();
            Response.Close();
        }
    }

 

另外，還有兩個是關於，點擊子節點把父節點的js（checkbox的判斷）

function setParentState(objNode)
    {
        var objParentDiv = WebForm_GetParentByTagName(objNode,"div");
        //alert('setParentState___'+objParentDiv);
        if(objParentDiv == null || objParentDiv == "undefined")
            return;
           
        var divID = objParentDiv.getAttribute("ID");
        var prefix = divID.substring(0,divID.indexOf("Nodes"));
        var parentID = prefix + "CheckBox";
       
        var parentChk = document.getElementById(parentID);
        if(parentChk == null || parentChk == "undefined")
            return;

        if (objNode.checked)
        {
            parentChk.checked = true;
        }
        else
        {
            if (isAllChildrenUnChecked(parentChk))
            {
                parentChk.checked = false;
            }
        }
       
       
        setParentState(parentChk);
    }
   
    function setChildState(objNode)//設定子控件狀態
    {
        var nodeID = objNode.getAttribute("ID");   //chkBox ID
        //alert('setChildState__'+nodeID);
        var prefix = nodeID.substring(0,nodeID.indexOf("CheckBox"));  //節點的前綴
        var childrenDiv = document.getElementById(prefix + "Nodes");
       
        if(childrenDiv == null || childrenDiv == "undefined")
            return ;
            
        var childrenArray = childrenDiv.children; //取得所有子控件

        for(var i = 0;i< childrenArray.length;i++)
        {
            var container = childrenArray[i]; //子控件的容器
            var chk = WebForm_GetElementByTagName(container,"input");
//查找Check控件,由於只有一個種Input控件,就是CheckBox
            chk.checked = objNode.checked;
                  
            setChildState(chk);
                      
        }
           
    }
   
    function isAllChildrenUnChecked(objChk)
    {
        var objChkID = objChk.getAttribute("ID");
        var prefix = objChkID.substring(0,objChkID.indexOf("CheckBox"));  //節點的前綴
        var childrenDiv = document.getElementById(prefix + "Nodes");
       
         if(childrenDiv == null || childrenDiv == "undefined")
            return ;
           
        var childrenArray = childrenDiv.children; //取得所有子控件
       
        for(var i = 0;i< childrenArray.length;i++)
        {
            var container = childrenArray[i]; //子控件的容器
            var chk = WebForm_GetElementByTagName(container,"input");
 //查找Check控件,由於只有一個種Input控件,就是CheckBox
          
            if (chk.checked)
                return false;
                      
        }
       
        return true;
    }
   

    //觸發事件
    function HandleCheckEvent()
    {
        //alert(theForm.elements['TreeView1_SelectedNode'].index);
        var objNode = event.srcElement;

        if(objNode.tagName !="INPUT" || objNode.type!="checkbox")
            return;
        //alert(objNode);
         //設定子Chk狀態
        setChildState(objNode);
        //設定父Chk狀態
        setParentState(objNode);

     
    }