silverlight 从数据库获取到数据，动态生成XMLWEN文件，并获取文件进行操作

            // Silverlight中的独立存储是其内部的可信任的可访问文件空间，在这里你可以使用Silverlight随意的创建、读取、写入、删除目录和文件，它有一些类似于Cookie,但是它可以在客户端保存大量的数据。这个空间默认是1M，如果不够的时候可以申请扩大容量。

              private void PopulateWithData()
        {
            #region update by zxh

            List<decichain> lst = Session.ChainLst.Where(m => m.OrgID.ToString() == orgid).ToList();

            using (IsolatedStorageFile isoStore = IsolatedStorageFile.GetUserStoreForApplication())
            {
                #region 动态生成XML文件

                using (IsolatedStorageFileStream isoStream = new IsolatedStorageFileStream("IsoStoreFile.xml", FileMode.Create, isoStore))
                {
                    XmlWriterSettings settings = new XmlWriterSettings();
                    settings.Indent = true;

                    using (XmlWriter writer = XmlWriter.Create(isoStream, settings))
                    {
                        //写xml文件开始<?xml version="1.0" encoding="utf-8" ?>
                        writer.WriteStartDocument(false);
                        //写根节点
                        writer.WriteStartElement("Root");

                        foreach (decichain chain in lst.Where(m => m.UpDeci == -1).ToList())
                        {
                            writer.WriteStartElement("Node");
                            writer.WriteAttributeString("Name", chain.Name);
                            writer.WriteAttributeString("Email", chain.Email);
                            writer.WriteAttributeString("Phone", chain.Phone);
                            writer.WriteAttributeString("Position", chain.Position1);
                            writer.WriteAttributeString("Branch", chain.Branch);
                            writer.WriteAttributeString("ImgName", chain.ImgName);

                            AddChildrenNode(lst.Where(m => m.UpDeci == chain.ID).ToList(), writer);

                            //将此新节点添加到根节点下
                            writer.WriteEndElement();
                        }
                        writer.WriteEndElement();

                        writer.Flush();
                    }
                }

                #endregion

                using (StreamReader reader = new StreamReader(isoStore.OpenFile("IsoStoreFile.xml", FileMode.Open)))
                {
                    XElement dataXml = XElement.Load(reader);

                    foreach (XElement element in dataXml.Elements("Node"))
                    {
                        Node node = this.CreateNode(element);
                        node.Children.AddRange(this.GetSubNodes(element));
                        this.HierarchicalDataSource.Add(node);
                    }
                }
            }

            #endregion
        }

        private void AddChildrenNode(List<decichain> Lst, XmlWriter writer)
        {
            foreach (decichain chain in Lst)
            {
                writer.WriteStartElement("Node");
                writer.WriteAttributeString("Name", chain.Name);
                writer.WriteAttributeString("Email", chain.Email);
                writer.WriteAttributeString("Phone", chain.Phone);
                writer.WriteAttributeString("Position", chain.Position1);
                writer.WriteAttributeString("Branch", chain.Branch);
                writer.WriteAttributeString("ImgName", chain.ImgName);

                AddChildrenNode(Session.ChainLst.Where(m => m.UpDeci == chain.ID).ToList(), writer);

                //将此新节点添加到根节点下
                writer.WriteEndElement();
            }
        }

        private ObservableCollection<HierarchicalNodeViewModel> GetSubNodes(XContainer element)
        {
            var nodes = new ObservableCollection<HierarchicalNodeViewModel>();
            foreach (var subElement in element.Elements("Node"))
            {
                var node = this.CreateNode(subElement);
                node.Children.AddRange(this.GetSubNodes(subElement));
                nodes.Add(node);
            }

            return nodes;
        }

        private Node CreateNode(XElement element)
        {
            Node node = new Node();
            node.PropertyChanged += this.Node_PropertyChanged;
            node.Name = element.Attribute("Name").Value;
            node.Phone = element.Attribute("Phone").Value;
            node.Email = element.Attribute("Email").Value;
            node.ImagePath = "/Pics/" + element.Attribute("ImgName").Value;
            node.JobPosition = element.Attribute("Position").Value;
            node.Branch = (Branch)Enum.Parse(typeof(Branch), element.Attribute("Branch").Value, true);
            return node;
        }