xml与object 之间的ORM

xml映射为object对象，同时object对象，以xml来表示：

    public class Tools
    {
        private static XmlNodeList SelectNodes(string xpath, string path)
        {
            XmlDocument doc = new XmlDocument();
            doc.Load(path);
            return doc.SelectNodes(xpath);
        }
        private static XmlNode SelectSingleNode(string xpath, string path)
        {
            XmlDocument doc = new XmlDocument();
            doc.Load(path);
            return doc.SelectSingleNode(xpath);
        }

        public static T SelectSingle<T>(string selectNode, string path) where T : IxmlToObject<T>, new()
        {
            T item = new T();

            var node = SelectSingleNode(selectNode, path);

            if (node != null)
            {
                T obj = item.XmlToObject(node);

            }
            return item;
        }
        public static void SaveXml(IxmlFormat obj, string path)
        {
            XmlDocument doc = new XmlDocument();
            var xml = obj.ToXml();
            doc.LoadXml(xml);
            doc.Save(path);
        }

        public static List<T> SelectList<T>(string selectNode,string path) where T:new()
        {
            List<T> items = new List<T>();

            var nodes = SelectNodes(selectNode,path);

            if (nodes != null)
            {
                var type = typeof(T);
                var properties = type.GetProperties().ToList();

                foreach (XmlNode node in nodes)
                {
                    T config = new T();

                    foreach (XmlAttribute a in node.Attributes)
                    {
                        string name = a.Name;
                        string value = a.Value;

                        var p = properties.FirstOrDefault(t => t.Name.ToLower() == name.ToLower());

                        if (p != null)
                        {
                           p.SetValue(config, value, null);
                        }
                    }
                    items.Add(config);
                }
            }
            return items;
        }

        public static string ReplaceSpecialChars(string content)
        {
            if (string.IsNullOrEmpty(content)) return "";

            string[] specialChars = { "&", "<", ">", """, "'" };
            string[] entities = { "&amp;", "&lt;", "&gt;", "&quot;", "&apos;" };

            int i = 0;
            foreach (var item in specialChars)
            {
                content = content.Replace(item, entities[i]);
                i++;
            }
            return content;
        }
}

这是公共的接口：

    public interface IxmlFormat
    {
        string ToXml();
    }
    public interface IxmlToObject<T>
    {
        T XmlToObject(XmlNode node);
    }

下面是自定义Object对象对接口的实现：

public class TestCase : IxmlFormat, IxmlToObject<TestCase>
    {
        public string Title { set; get; }
        public string Author { set; get; }
        public string BibType { set; get; }
        /// <summary>
        /// 测试用例路径
        /// </summary>
        public string FilePath { set; get; }

        public List<SearchResult> StandardResults { set; get; }

        public List<SearchResult> SearchResults { set; get; }

        public string ToXml()
        {
            var title = Tools.ReplaceSpecialChars(this.Title);
            var author = Tools.ReplaceSpecialChars(this.Author);
            var bibType = Tools.ReplaceSpecialChars(this.BibType);

            StringBuilder sb = new StringBuilder();

            sb.Append("<?xml version="1.0" encoding="utf-8" ?>");

            if (SearchResults != null && SearchResults.Count > 0)
            {
                sb.AppendFormat("<case  title="{0}"  author="{1}"  bibType="{2}" >", title, author, bibType);

                foreach (SearchResult item in SearchResults)
                {
                    sb.AppendFormat("<item title="{0}">", Tools.ReplaceSpecialChars(item.Title));

                    foreach (var fitem in item.Fields)
                    {
                        sb.AppendFormat("<field content="{0}"/>", Tools.ReplaceSpecialChars(fitem));
                    }
                    sb.AppendFormat("</item>");
                }

                sb.Append("</case>");
            }
            return sb.ToString();
        }

        public TestCase XmlToObject(XmlNode node)
        {
            string title = node.Attributes["title"].Value;
            string author = node.Attributes["author"].Value;
            string bibType = node.Attributes["bibType"].Value;

            this.Title = title;
            this.Author = author;
            this.BibType = bibType;


            this.StandardResults = new List<SearchResult>();
            XmlNodeList itemNodes = node.SelectNodes("//item");
            foreach (XmlNode n in itemNodes)
            {
                var sr = new SearchResult()
                {
                    Title = n.Attributes["title"].Value,
                    Fields = new List<string>()
                };

                var fileds = n.ChildNodes;

                foreach (XmlNode fn in fileds)
                {
                    sr.Fields.Add(fn.Attributes["content"].Value);
                }
                this.StandardResults.Add(sr);
            }

            return this;
        }
    }

    public class SearchResult
    {
        public string Title { set; get; }

        public List<string> Fields { set; get; }

    }

这是一个测试用例，程序从xml文件中读取测试用例，运行测试程序，完成后把结果保存到另外一个xml文件中，这个xml文件结构和测试用例的xml结构一样。我们看看如何读取测试用例：

        /// <summary>
        /// 读取测试用例
        /// </summary>
        /// <returns></returns>
        private static List<TestCase> GetTestCase(string caseDir)
        {
            List<TestCase> tests = new List<TestCase>();

            var files = Directory.GetFiles(caseDir);

            foreach (var f in files)
            {
                var filePath = f;
                var testCase = Tools.SelectSingle<TestCase>("//case", filePath);
                testCase.FilePath = filePath;
                tests.Add(testCase);
            }

            return tests;
        }

保存测试结果：

         TestCase t = new TestCase()
         {
             FilePath = viewModel.FilePath,
             Author = viewModel.SearchAuthor,
             Title = viewModel.SearchTitle,
             BibType = viewModel.SearchType,
             SearchResults = viewModel.TestResultData,
             StandardResults = viewModel.StandardResults
         };

          string path = viewModel.TestResultFilePath + "\" + viewModel.ResolveName;

          if (!Directory.Exists(path)) Directory.CreateDirectory(path);

          path += "\" + Path.GetFileNameWithoutExtension(t.FilePath) + "_data.xml";

          Tools.SaveXml(t, path);

注意：对象与xml之间的转换，再转为xml时，注意特殊符号的转义，否则会报错。