利用TreeView控件动态生成无限级树（续:通过绑定动态xml文件）

在上一篇 利用TreeView控件动态生成无限级树
中提到的那个动态生成XML文件进行绑定的办法
今天也被我实现了
把生成XML文件的代码单独放到一个页面中，比如说叫GetXml.aspx页中去
然后指定

TreeView2.TreeNodeSrc  =   " GetXml.aspx " ;

而这个GetXml.aspx.cs中的代码如下

private   void  SendXml()

        

{

            

//Create Xml File

            XmlDocument objXmlDoc = new XmlDocument();

            

//Insert Xml Declaration

            XmlDeclaration objXmlDeclare = objXmlDoc.CreateXmlDeclaration("1.0", "UTF-8", "yes");

            objXmlDoc.InsertBefore(objXmlDeclare, objXmlDoc.DocumentElement);

            XmlElement objRootElem 

= objXmlDoc.CreateElement("TREENODES");

            objXmlDoc.AppendChild(objRootElem);

            CreateXml(objXmlDoc, objRootElem, 

0);

            System.Xml.XmlTextWriter xmlwriter 

= new System.Xml.XmlTextWriter(Response.OutputStream,Response.ContentEncoding);

            xmlwriter.Formatting 

= Formatting.Indented;

            xmlwriter.Indentation 

= 4;

            xmlwriter.IndentChar 

= ' ';

            objXmlDoc.WriteTo(xmlwriter);

            xmlwriter.Flush();

            Response.End();

            xmlwriter.Close();

        }

        

private   void  CreateXml(XmlDocument objXMLDoc, XmlElement objRootElem,  int  belong)

        

{

            

//Get DataSet

            DataSet ds = new DataSet();

            

foreach(DataRow dr in ds.Tables[0].Rows)

            

{

                

//Create ChildNode TreeNode

                XmlElement objXmlElem = objXMLDoc.CreateElement("TREENODE");

                objRootElem.AppendChild(objXmlElem);

                

//Create Attributes Text

                XmlAttribute objXmlAttText = objXMLDoc.CreateAttribute("Text");

                objXmlAttText.Value 

= dr["text"].ToString().Trim();

                objXmlElem.SetAttributeNode(objXmlAttText);

                

//Create Attributes CheckBox

                XmlAttribute objXmlAttCB = objXMLDoc.CreateAttribute("CheckBox");

                objXmlAttCB.Value 

= "True";

                objXmlElem.SetAttributeNode(objXmlAttCB);

                

//Create Attributes Expanded

                XmlAttribute objXmlAttExp = objXMLDoc.CreateAttribute("Expanded");

                objXmlAttExp.Value 

= "True";

                objXmlElem.SetAttributeNode(objXmlAttExp);

                

int id = int.Parse(dr["id"].ToString().Trim());

                CreateXml(objXMLDoc, objXmlElem, id);

            }

        }

函数的递归思想用的仍然是上一篇中的同样的思想
这里把生成的objXMLdoc文件用XmlTextWriter写入到一个Xml流中
然后利用xmlwriter.Flush()的方式进行输出
这样就可以得到这个Xml文件了
在PageLoad函数里调用这个SendXml()方法即可

private   void  Page_Load( object  sender, System.EventArgs e)

        

{

            BindXmlTree();

        }