读写XML文件

深碍√TFBOYSˉ_ 2022-05-25 22:09 160阅读 0赞

**1.将XML数据写入文件**

/// <summary>
             /// 写入xml
             /// </summary>
             /// <typeparam name="T">传入obj得类型</typeparam>
             /// <param name="fileName">保存得文件路径</param>
             /// <param name="obj">要保存得数据</param>
            public void WriteObjectToFile<T>(string fileName, T obj)
            {
                DataContractSerializer serializer = new DataContractSerializer(typeof(T));
                using (XmlWriter writer = new XmlTextWriter(fileName, Encoding.UTF8))
                {
                    serializer.WriteObject(writer, obj);
                }
            }

**2.从文件中读取XML数据，并序列化为对象**

/// <summary>
             /// 从文件中读取数据到xml文件
             /// </summary>
             /// <typeparam name="T">返回类型</typeparam>
             /// <param name="fileName">读取的文件路径</param>
            public T ReadObjectFromFile<T>(string fileName)
            {
                //会有多线程访问，文件被占用问题
                FileStream fs = new FileStream(fileName, FileMode.Open);
                /*FileAccess.Read读取和写入到文件的访问 *ReadWrite 允许随后打开文件读取或写入。 * 如果未指定此标志，则文件关闭前，任何打开该文件以进行读取或写入的请求（由此进程或另一进程发出）都将失败。 *FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite); */
                XmlDictionaryReader reader =
                    XmlDictionaryReader.CreateTextReader(fs, new XmlDictionaryReaderQuotas());
                DataContractSerializer ser = new DataContractSerializer(typeof(T));
    
                T obj = (T)ser.ReadObject(reader, true);
                reader.Close();
                fs.Close();
                return obj;
    
            }

**3.将模型数据序列化为XML格式，并返回字符串**

/// <summary>
           /// 
           /// </summary>
           /// <typeparam name="T">类型</typeparam>
           /// <param name="obj">模型数据</param>
           /// <returns>返回xml字符串</returns>
            public string Serialize<T>(T obj)
            {
                DataContractSerializer ser = new DataContractSerializer(typeof(T));
                string xmlStr = String.Empty;
                using (MemoryStream stream = new MemoryStream())
                {
                    try
                    {
                        ser.WriteObject(stream, obj);
                        xmlStr = Encoding.Unicode.GetString(stream.ToArray());
                    }
                    catch
                    {
                        throw;
                    }
                }
                return xmlStr;
            }

**4.将XML字符串转换成模型**

/// <summary>
            /// 
            /// </summary>
            /// <typeparam name="T"></typeparam>
            /// <param name="xmlStr">xml字符串</param>
            /// <returns>返回模型</returns>
            public T Deserialize<T>(string xmlStr)
            {
                T obj;
                try
                {
                    DataContractSerializer dcs = new DataContractSerializer(typeof(T));
                    using (TextReader reader = new StringReader(xmlStr))
                    {
                        using (XmlReader xReader = XmlReader.Create(reader))
                        {
                            obj = (T)dcs.ReadObject(xReader);
                        }
                    }
                }
                catch
                {
                    throw;
                }
                return obj;
    
            }

后两个方法依赖的程序集

using System.Runtime.Serialization;

Model模型要加特性，这样才能序列化成功

[Serializable, DataContract]
        public class NFSInfo
        {
            [DataMember]
            public string Name{ get; set; }
            [DataMember]
            public string Age { get; set; }
        }