Silverlight 使用IsolatedStorage新建XML文件，并且用LINQ查询XML

代码



Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->using System;

using System.Linq;

using System.Windows.Shapes;

using System.Collections.Generic;

using System.Collections.ObjectModel;

using System.IO.IsolatedStorage;

using System.IO;

using System.Xml.Linq;

using System.Xml;

namespace ServiceFacade

{



    public class FResourceCategoryCode

    {

       readonly string strFileName = "ResourceCategoryCode.xml";

        List<FResourceCategoryCodeModel> lfrccs = new List<FResourceCategoryCodeModel>();

/// <summary>

/// 生成XML缓存文件

/// </summary>

public void CreateFile(List<FResourceCategoryCodeModel> lfrccm)

{

try

{

using (IsolatedStorageFile isoStore =

IsolatedStorageFile.GetUserStoreForApplication())

{

using (IsolatedStorageFileStream isoStream =

new IsolatedStorageFileStream(strFileName,

FileMode.Create, isoStore))

{

// 根据每个用户存储一个信息

XmlWriterSettings settings = new XmlWriterSettings();

settings.Indent = true;

// 创建一个XmlWriter.

using (XmlWriter writer = XmlWriter.Create(isoStream, settings))

{

//设置XML的根

writer.WriteStartElement("ResourceCategorys");

foreach (var v in lfrccm)

{

//设置每个元素的根

writer.WriteStartElement("ResourceCategory");



//以下为设置每个元素及值

writer.WriteStartElement("cncCategroyStandard");

writer.WriteString(v.CncCategroyStandard);

writer.WriteEndElement();



writer.WriteStartElement("cnvcCategoryCode");

writer.WriteString(v.CnvcCategoryCode);

writer.WriteEndElement();



writer.WriteStartElement("cnvcCategoryName");

writer.WriteString(v.CnvcCategoryName);

writer.WriteEndElement();



writer.WriteStartElement("cniLevel");

writer.WriteString(Convert.ToString(v.CniLevel));

writer.WriteEndElement();



writer.WriteStartElement("cnvcParentCode");

writer.WriteString(v.CnvcParentCode);

writer.WriteEndElement();



writer.WriteStartElement("cniOrderID");

writer.WriteString(Convert.ToString(v.CniOrderID));

writer.WriteEndElement();



//XML结束标记

writer.WriteEndElement();

}

//XML根结束标记

writer.WriteEndElement();

writer.Flush();

}

}

}

}

catch

{

;

}

}



/// <summary>

        /// 读取缓存文件

        /// </summary>

        private void ReadXml()

        {

            using (IsolatedStorageFile store =

                     IsolatedStorageFile.GetUserStoreForApplication())

            {

                //读取文件并把文件转化为StreamReader

                StreamReader reader = new StreamReader(store.OpenFile(strFileName,

                   FileMode.Open, FileAccess.Read));

                //把字符串转化为XML

                XDocument xmlStory = XDocument.Parse(reader.ReadToEnd());

                //利用LINQ TO XML转化为集合

               var varDetails = from details in xmlStory.Descendants("ResourceCategory")  //只取得节点为ResourceCategory的信息

                                 select new FResourceCategoryCodeModel

                                 {

                                     CncCategroyStandard = (string)details.Element("cncCategroyStandard"),

                                     CnvcCategoryCode = (string)details.Element("cnvcCategoryCode"),

                                     CnvcCategoryName = (string)details.Element("cnvcCategoryName"),

                                     CniLevel = (int)details.Element("cniLevel"),

                                     CniOrderID = (int)details.Element("cniOrderID"),

                                     CnvcParentCode = (string)details.Element("cnvcParentCode")

                                 };

                lfrccs = varDetails.ToList<FResourceCategoryCodeModel>();

                store.Dispose();

            }

        }



/// <summary>

        /// 实体类

        /// </summary>

  public class FResourceCategoryCodeModel

    {

        private int _cniCategroyID;

        /// <summary>

        /// 流水号

        /// </summary>

        public int CniCategroyID

        {

            get { return _cniCategroyID; }

            set { _cniCategroyID = value; }

        }

        private string _cncCategroyStandard;

        /// <summary>

        /// 标准分类编码

        /// </summary>

        public string CncCategroyStandard

        {

            get { return _cncCategroyStandard; }

            set { _cncCategroyStandard = value; }

        }

        private string _cnvcCategoryCode;

        /// <summary>

        /// 资源分类编码

        /// </summary>

        public string CnvcCategoryCode

        {

            get { return _cnvcCategoryCode; }

            set { _cnvcCategoryCode = value; }

        }

        private string _cnvcCategoryName;

        /// <summary>

        /// 资源分类名称

        /// </summary>

        public string CnvcCategoryName

        {

            get { return _cnvcCategoryName; }

            set { _cnvcCategoryName = value; }

        }

        private int _cniLevel;

        /// <summary>

        /// 资源分类层级

        /// </summary>

        public int CniLevel

        {

            get { return _cniLevel; }

            set { _cniLevel = value; }

        }

        private string _cnvcParentCode;

        /// <summary>

        /// 资源分类父级代码

        /// </summary>

        public string CnvcParentCode

        {

            get { return _cnvcParentCode; }

            set { _cnvcParentCode = value; }

        }

        private int _cniOrderID;

        /// <summary>

        /// 排序ID

        /// </summary>

        public int CniOrderID

        {

            get { return _cniOrderID; }

            set { _cniOrderID = value; }

        }

        private string _cnvcRemark;

        /// <summary>

        /// 说明文字

        /// </summary>

        public string CnvcRemark

        {

            get { return _cnvcRemark; }

            set { _cnvcRemark = value; }

        }

}

}

}

然后通过调用方法CreateFile和ReadXml就可以实现了，文件存放的地址是SL的独立空间，在XP系统下的存放地址为C:\Documents and Settings\用户名\Local Settings\Application Data\Microsoft\Silverlight目录下，可以找到很多缓存文件

文章转自：http://www.cnblogs.com/888h/archive/2010/10/20/1856407.html