UltraWebTree的递归绑定和节点拖动

1.html代码

< HTML >
     < HEAD >
         < title > TreeView </ title >
         < meta  content ="Microsoft Visual Studio .NET 7.1"  name ="GENERATOR" >
         < meta  content ="C#"  name ="CODE_LANGUAGE" >
         < meta  content ="JavaScript"  name ="vs_defaultClientScript" >
         < meta  content ="http://schemas.microsoft.com/intellisense/ie5"  name ="vs_targetSchema" >         
         < SCRIPT  type ="text/javascript" >     
        function UltraWebTree1_DragStart(oTree, oNode, oDataTransfer, oEvent)
        {
            //debugger;
            oDataTransfer.dataTransfer.setData("Text", oNode.getText());
            oDataTransfer.dataTransfer.effectAllowed = "move";        
        }

        function UltraWebTree1_Drop(oTree, oNode, oDataTransfer, oEvent)
        {
            //debugger;
            if(oNode.getParent()!=null)
            {
                alert("Please make sure that the form is moved to a case and try again.");
                return false;
            }
            var sourceNode = oDataTransfer.sourceObject;
            if(sourceNode.getParent()==null)
            {
                alert("Please make sure that the form is moved to a case and try again.");
                return false;
            }
            
            oNode.addChild(oDataTransfer.dataTransfer.getData("Text"));
            oNode.setExpanded(true);
            
                    
            if(sourceNode)
            {            
                sourceNode.remove();
                
            }
            return false;
        }
        
         </ SCRIPT >
     </ HEAD >
     < body >
         < form  id ="Form1"  method ="post"  runat ="server" >
             < TABLE  id ="Table1"  height ="100%"  cellSpacing ="0"  cellPadding ="0"  width ="100%"  border ="0" >
                
                 < TR  vAlign ="top"  height ="100%" >
                     < TD  colSpan ="2" >< ignav:ultrawebtree  id ="UltraWebTree1"  runat ="server"  AllowDrop ="True"  AllowDrag ="True"  BorderStyle ="Groove"
                            BackColor ="#E0E0E0"  BrowserTarget ="Auto"  Cursor ="hand"  WebTreeTarget ="HierarchicalTree"  AutoPostBack ="False"
                            Editable ="False"  Height ="100%"  Width ="100%"  BorderWidth ="3px" >
                             < SelectedNodeStyle  ForeColor ="White"  BackColor ="DarkBlue" ></ SelectedNodeStyle >
                             < Padding  Top ="5px" ></ Padding >
                             < Levels >
                                 < ignav:Level  Index ="0" ></ ignav:Level >
                                 < ignav:Level  Index ="1" ></ ignav:Level >
                                 < ignav:Level  Index ="2" ></ ignav:Level >
                             </ Levels >
                             < Styles >
                                <ignav:Style CssClass="DefaultItemClass"></ignav:Style>
                                <ignav:Style Cursor="Hand" Font-Underline="True" Font-Names="Arial" ForeColor="#FF8000" BackColor="PaleGoldenrod"
                                    CssClass="HoverClass"></ignav:Style>
                                <ignav:Style ForeColor="White" BackColor="Tan" CssClass="HiliteClass"></ignav:Style>
                             </ Styles >
                             < ClientSideEvents  AfterNodeSelectionChange ="AfterNodeSelChange"  DragStart ="UltraWebTree1_DragStart"
                                Drop ="UltraWebTree1_Drop" ></ ClientSideEvents >
                         </ ignav:ultrawebtree ></ TD >
                 </ TR >                 
             </ TABLE >
         </ form >
     </ body >
</ HTML >

2.cs代码

// using Infragistics.WebUI.UltraWebNavigator;
     public   class  TreeView : System.Web.UI.Page
     {        
        protected Infragistics.WebUI.UltraWebNavigator.UltraWebTree UltraWebTree1;
    
        private void Page_Load(object sender, System.EventArgs e)
        {
            if(!Page.IsPostBack)
            {
                UltraWebTree1.Nodes.Clear();
                BindTree(UltraWebTree1.Nodes,ds.Tables[0],"0");
            }
        }
        private void BindTree(Infragistics.WebUI.UltraWebNavigator.Nodes  Nds,DataTable dt,string id)
        {
            DataView dv = new DataView(dt);
            dv.RowFilter = "parentid = '"+id.ToString()+"'";
            Node node;

            foreach(DataRowView drv in dv)
            {
                node=new Node();
                node.Tag=drv["id"].ToString();
                node.Text=drv["name"].ToString();                
                node.Expanded=true;
                Nds.Add(node);
                BindTree(node.Nodes,dt,drv["id"].ToString());
            }  
        }
        
        
        Web Form Designer generated code#region Web Form Designer generated code
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: This call is required by the ASP.NET Web Form Designer.
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /**//// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {    
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion

         GetData#region GetData
            private DataTable GetData()
                {
                DataTable dt;
                dt = new DataTable();

                dt.Columns.Add("id");
                dt.Columns.Add("parentid");
                dt.Columns.Add("name");
            
                DataRow dr;
                dr = dt.NewRow();
                dr["id"] = "1";
                dr["parentid"] = "0";
                dr["name"] = "a";
                dt.Rows.Add(dr);

                dr = dt.NewRow();
                dr["id"] = "2";
                dr["parentid"] = "1";
                dr["name"] = "b";
                dt.Rows.Add(dr);

                dr = dt.NewRow();
                dr["id"] = "3";
                dr["parentid"] = "1";
                dr["name"] = "c";
                dt.Rows.Add(dr);

                dr = dt.NewRow();
                dr["id"] = "4";
                dr["parentid"] = "2";
                dr["name"] = "d";
                dt.Rows.Add(dr);

                dr = dt.NewRow();
                dr["id"] = "5";
                dr["parentid"] = "2";
                dr["name"] = "e";
                dt.Rows.Add(dr);

                dr = dt.NewRow();
                dr["id"] = "6";
                dr["parentid"] = "3";
                dr["name"] = "f";
                dt.Rows.Add(dr);
                return dt;

            }
            
    }