silverlight IsolatedStorageFile 创建及 *** 作xml

概述//记得添加xml xml.Linq的引用哦using System;using System.IO;using System.Net;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Ink;using System.

//记得添加xml  xml.linq的引用哦using System;using System.IO;using System.Net;using System.windows;using System.windows.Controls;using System.windows.documents;using System.windows.Ink;using System.windows.input;using System.windows.Media;using System.windows.Media.Animation;using System.windows.Shapes;using System.Collections.Generic;using System.IO.IsolatedStorage;using System.Xml;using System.Xml.linq;namespace XmlMemoryDemo{    public class MemoryOper    {                private static string strXml =        @"<?xml version=""1.0"" enCoding=""utf-8""?>            <projects>                <name>value</name>            </projects>";        /// <summary>        /// 判断文件是否存在        /// </summary>        private static bool existFille(string path)        {            using (var isofile = IsolatedStoragefile.GetUserStoreForApplication())            {                if (isofile.fileExists(path))                {                    return true;                }                return false;            }        }        /// <summary>        /// 判断节点是否存在        /// </summary>        private static bool exitsNode(string path,string name,string value)        {            List<MemoryNode> nodes = getNodes(path);            MemoryNode node = new MemoryNode(name,path);            if (nodes.Contains(node))            {                return true;            }            return false;        }        /// <summary>        /// 创建文件        /// </summary>        /// <param name="path"></param>        private static voID createfile(string path)        {            if (!existFille(path))            {                using (var isofile = IsolatedStoragefile.GetUserStoreForApplication())                {                    using (var stream = new IsolatedStoragefileStream(path,fileMode.Create,isofile))                    {                        using (var writer = new StreamWriter(stream))                        {                            writer.Writeline(strXml);                            writer.Close();                        }                        stream.Close();                    }                }            }        }        /// <summary>        /// 返回所有节点        /// </summary>        private static List<MemoryNode> getNodes(string path)        {            createfile(path);            using (var isofile = IsolatedStoragefile.GetUserStoreForApplication())            {                using (var stream = new IsolatedStoragefileStream(path,fileMode.Open,isofile))                {                    XmlReader reader = XmlReader.Create(stream);                    Xdocument xDoc = Xdocument.Load(reader);                    XElement Root = xDoc.Root;                    List<MemoryNode> results = new List<MemoryNode>();                    foreach (XElement ele in Root.Elements())                    {                        MemoryNode result = new MemoryNode(ele.name.ToString(),ele.Value.ToString());                        results.Add(result);                    }                    stream.Close();                    return results;                }            }        }        /// <summary>        /// 通过名称获得value        /// </summary>        public static string getValue(string path,string name)        {            List<MemoryNode> nodes = getNodes(path);            foreach(MemoryNode node in nodes)            {                if (node.name.Equals(name))                {                    return node.value;                }            }            return "";        }        /// <summary>        /// 添加节点        /// </summary>        public static voID addNode(string path,string value)        {            createfile(path);            if (exitsNode(path,name,value))            {                updateNode(path,value);//已经存在的节点更新即可                return;            }            using (var isofile = IsolatedStoragefile.GetUserStoreForApplication())            {                Xdocument xdoc=null;                using (IsolatedStoragefileStream isoStream = new IsolatedStoragefileStream(path,isofile))                {                    XElement newElement = new XElement(name,value);                    xdoc=Xdocument.Load(isoStream);                    xdoc.Root.Add(newElement);                }                using (IsolatedStoragefileStream isoStream = new IsolatedStoragefileStream(path,fileMode.Truncate,fileAccess.Write,isofile))                {                    using (StreamWriter sw = new StreamWriter(isoStream,System.Text.EnCoding.UTF8))                    {                        xdoc.Save(sw);                    }                }            }        }        /// <summary>        /// 更新节点        /// </summary>        private static voID updateNode(string path,string value)        {            createfile(path);            using (var isofile = IsolatedStoragefile.GetUserStoreForApplication())            {                Xdocument xdoc = null;                using (IsolatedStoragefileStream isoStream = new IsolatedStoragefileStream(path,value);                    xdoc = Xdocument.Load(isoStream);                    XElement root = xdoc.Root;                    foreach (XElement ele in root.Elements())                    {                        if (ele.name.ToString().Equals(name))                        {                            ele.Remove();                        }                    }                    xdoc.Root.Add(new XElement(name,value));                                        /*                    foreach (XElement ele in root.Elements())                    {                        if (ele.name.ToString().Equals(name))                        {                            ele.Remove();                        }                    }                    xdoc.Root.Add(new XElement(name,value));                   */                    /*                    foreach (XElement ele in root.Elements())                    {                        if (ele.name.ToString().Equals(name))                        {                            ele.ReplaceWith(new XElement(name,value));                        }                    }                     */                                     }                using (IsolatedStoragefileStream isoStream = new IsolatedStoragefileStream(path,System.Text.EnCoding.UTF8))                    {                        xdoc.Save(sw);                    }                }            }        }    }    /// <summary>    /// 记录节点信息的类 重写了Equals方法    /// </summary>    public class MemoryNode    {        public string name { set; get; }        public string value { set; get; }        public MemoryNode(string name,string value)        {            this.name = name;            this.value = value;        }        public overrIDe bool Equals(Object node)        {            if (node == null)            {                return false;            }            MemoryNode newNode = (MemoryNode)node;            if(this.name.Equals(newNode.name))            {                return true;            }            return false;                    }           }}

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