C# 自定义属性Attribute
自定义属性
/// <summary> /// 脱敏属性 /// </summary> public class SensitiveAttribute:Attribute { #region Fields public SensitiveType SensitiveType { get; set; } /// <summary> /// 开始位置 /// </summary> public int Start { get; set; } /// <summary> /// 长度 /// </summary> public int Len { get; set; } /// <summary> /// 敏感字符替换 /// </summary> public string SensitiveReChar { get; set; } #endregion #region Constructors and Destructors public SensitiveAttribute() { this.Start = 1; this.Len = 2; this.SensitiveReChar = "*"; } public SensitiveAttribute(SensitiveType type = SensitiveType.IdNumber,int start = 1,int len = 5,string sensitiveReChar = "*") { this.SensitiveType = type; this.Start = start; this.Len = len; this.SensitiveReChar = sensitiveReChar; } #endregion #region Public Methods and Operators #endregion } /// <summary> /// 类型 /// </summary> public enum SensitiveType { IdNumber, Name }
类：
/// <summary> /// /// </summary> public class UserInfo { public string Code { get; set; } public string Name { get; set; } [Sensitive] public string Phone { get; set; } [Sensitive(SensitiveType.Name,Len = 3)] public string IdCard { get; set; } }
获取属性
public static class CustomAttributeHelper { #region MyRegion ///// <summary> ///// Cache Data ///// </summary> //private static readonly Dictionary<string, string> Cache = new Dictionary<string, string>(); ///// <summary> ///// 获取CustomAttribute Value ///// </summary> ///// <typeparam name="T">Attribute的子类型</typeparam> ///// <param name="sourceType">头部标有CustomAttribute类的类型</param> ///// <param name="attributeValueAction">取Attribute具体哪个属性值的匿名函数</param> ///// <returns>返回Attribute的值，没有则返回null</returns> //public static string GetCustomAttributeValue<T>(this Type sourceType, Func<T, string> attributeValueAction) where T : Attribute //{ // return GetAttributeValue(sourceType, attributeValueAction, null); //} ///// <summary> ///// 获取CustomAttribute Value ///// </summary> ///// <typeparam name="T">Attribute的子类型</typeparam> ///// <param name="sourceType">头部标有CustomAttribute类的类型</param> ///// <param name="attributeValueAction">取Attribute具体哪个属性值的匿名函数</param> ///// <param name="name">field name或property name</param> ///// <returns>返回Attribute的值，没有则返回null</returns> //public static string GetCustomAttributeValue<T>(this Type sourceType, Func<T, string> attributeValueAction, // string name) where T : Attribute //{ // return GetAttributeValue(sourceType, attributeValueAction, name); //} //private static string GetAttributeValue<T>(Type sourceType, Func<T, string> attributeValueAction, // string name) where T : Attribute //{ // var key = BuildKey(sourceType, name); // if (!Cache.ContainsKey(key)) // { // CacheAttributeValue(sourceType, attributeValueAction, name); // } // return Cache[key]; //} ///// <summary> ///// 缓存Attribute Value ///// </summary> //private static void CacheAttributeValue<T>(Type type, // Func<T, string> attributeValueAction, string name) //{ // var key = BuildKey(type, name); // var value = GetValue(type, attributeValueAction, name); // lock (key + "_attributeValueLockKey") // { // if (!Cache.ContainsKey(key)) // { // Cache[key] = value; // } // } //} //private static string GetValue<T>(Type type, // Func<T, string> attributeValueAction, string name) //{ // object attribute = null; // if (string.IsNullOrEmpty(name)) // { // attribute = // type.GetCustomAttributes(typeof(T), false).FirstOrDefault(); // } // else // { // var propertyInfo = type.GetProperty(name); // if (propertyInfo != null) // { // attribute = // propertyInfo.GetCustomAttributes(typeof(T), false).FirstOrDefault(); // } // var fieldInfo = type.GetField(name); // if (fieldInfo != null) // { // attribute = fieldInfo.GetCustomAttributes(typeof(T), false).FirstOrDefault(); // } // } // return attribute == null ? null : attributeValueAction((T)attribute); //} ///// <summary> ///// 缓存Collection Name Key ///// </summary> //private static string BuildKey(Type type, string name) //{ // if (string.IsNullOrEmpty(name)) // { // return type.FullName; // } // return type.FullName + "." + name; //} #endregion public static List<T> GetSensitiveResult<T>(List<T> source) where T : class { PropertyInfo[] pro = (typeof(T)).GetProperties(); if (pro.Count() == 0) { return source; } SensitiveAttribute sensitive = new SensitiveAttribute(); var customProper = (typeof(T)).GetProperties().Where(p => p.GetCustomAttributes(typeof(SensitiveAttribute), true).Any()); foreach (var sou in source) { foreach (var item in customProper) { var itemValue = item.GetValue(sou, null); if (null!= itemValue) { var attrName = item.GetCustomAttribute(typeof(SensitiveAttribute), true); var sensitiveAttr = (attrName as SensitiveAttribute); string strSenChar = sensitiveAttr.SensitiveReChar; for (int i = 0; i < sensitiveAttr.Len - 1; i++) { strSenChar += sensitiveAttr.SensitiveReChar; } item.SetValue(sou, itemValue.ToString().Replace(itemValue.ToString().Substring(sensitiveAttr.Start, sensitiveAttr.Len), strSenChar), null); } } //foreach (var item in pro) //{ // var attrName = item.GetCustomAttribute(typeof(SensitiveAttribute), true); // var attrValue = sou.GetType().GetProperty(item.Name); // if (attrName != null) // { // var itemValue = item.GetValue(sou,null); // if (itemValue != null) // { // //item.SetValue(sou, itemValue.ToString().Replace(itemValue.ToString().Substring(3, 6), "******"), null); // } // } //} } return source; } }
/// <summary> /// 自定义属性 /// </summary> public static class CustomAttributeHelper { public static List<T> GetSensitiveResult<T>(List<T> source) where T : class { var customProper = (typeof(T)).GetProperties().Where(p => p.GetCustomAttributes(typeof(SensitiveAttribute), true).Any()); if (!customProper.Any()) { return source; } SensitiveAttribute sensitive = new SensitiveAttribute(); foreach (var sou in source) { foreach (var item in customProper) { var itemValue = item.GetValue(sou, null); if (null!= itemValue) { var attrName = item.GetCustomAttribute(typeof(SensitiveAttribute), true); var sensitiveAttr = (attrName as SensitiveAttribute); string strSenChar = sensitiveAttr.SensitiveReChar; for (int i = 0; i < sensitiveAttr.Len - 1; i++) { strSenChar += sensitiveAttr.SensitiveReChar; } item.SetValue(sou, itemValue.ToString().Replace(itemValue.ToString().Substring(sensitiveAttr.Start, sensitiveAttr.Len), strSenChar), null); } } } return source; } /// <summary> /// 脱敏属性结果 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="source"></param> /// <returns></returns> public static T GetSensitiveResult<T>(T source) where T : class { var customProper = (typeof(T)).GetProperties().Where(p => p.GetCustomAttributes(typeof(SensitiveAttribute), true).Any()); if (!customProper.Any()) { return source; } SensitiveAttribute sensitive = new SensitiveAttribute(); foreach (var item in customProper) { var itemValue = item.GetValue(source, null); if (null != itemValue) { var attrName = item.GetCustomAttribute(typeof(SensitiveAttribute), true); var sensitiveAttr = (attrName as SensitiveAttribute); string strSenChar = sensitiveAttr.SensitiveReChar; for (int i = 0; i < sensitiveAttr.Len - 1; i++) { strSenChar += sensitiveAttr.SensitiveReChar; } item.SetValue(source, itemValue.ToString().Replace(itemValue.ToString().Substring(sensitiveAttr.Start, sensitiveAttr.Len), strSenChar), null); } } return source; } private static int SIZE = 6; private static string SYMBOL = "*"; public static String toConceal(String value) { if (null == value || "".Equals(value)) { return value; } int len = value.Length; int pamaone = len / 2; int pamatwo = pamaone - 1; int pamathree = len % 2; StringBuilder stringBuilder = new StringBuilder(); if (len <= 2) { if (pamathree == 1) { return SYMBOL; } stringBuilder.Append(SYMBOL); stringBuilder.Append(value.Substring(len - 1,1)); } else { if (pamatwo <= 0) { stringBuilder.Append(value.Substring(0, 1)); stringBuilder.Append(SYMBOL); stringBuilder.Append(value.Substring(len - 1, 1)); } else if (pamatwo >= SIZE / 2 && SIZE + 1 != len) { int pamafive = (len - SIZE) / 2; stringBuilder.Append(value.Substring(0, pamafive)); for (int i = 0; i < SIZE; i++) { stringBuilder.Append(SYMBOL); } if ((pamathree == 0 && SIZE / 2 == 0) || (pamathree != 0 && SIZE % 2 != 0)) { stringBuilder.Append(value.Substring(len - pamafive)); } else { stringBuilder.Append(value.Substring(len - (pamafive + 1))); } } else { int pamafour = len - 2; stringBuilder.Append(value.Substring(0, 1)); for (int i = 0; i < pamafour; i++) { stringBuilder.Append(SYMBOL); } stringBuilder.Append(value.Substring(len - 1)); } } return stringBuilder.ToString(); } }
自定义过滤器：
public class SensitiveCustomAttribute:ActionFilterAttribute { //&& (objectContent.Value.GetType().BaseType == typeof(Parm) || objectContent.Value.GetType() == typeof(Parm)) public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext) { var objectContent = actionExecutedContext.Response.Content as ObjectContent; if (objectContent != null && objectContent.Value != null) { var res = objectContent.Value.GetType().GetProperty("Data"); if (null!= res) { var resVal = res.GetValue(objectContent.Value, null); if (resVal.GetType().IsGenericType) { foreach (var sou in (IEnumerable)resVal) { var customProper = sou.GetType().GetProperties().Where(p => p.GetCustomAttributes(typeof(SensitiveAttribute), true).Any()); foreach (var item in customProper) { var itemValue = item.GetValue(sou, null); if (null != itemValue) { var attrName = item.GetCustomAttribute(typeof(SensitiveAttribute), true); var sensitiveAttr = (attrName as SensitiveAttribute); string strSenChar = sensitiveAttr.SensitiveReChar; for (int i = 0; i < sensitiveAttr.Len - 1; i++) { strSenChar += sensitiveAttr.SensitiveReChar; } item.SetValue(sou, itemValue.ToString().Replace(itemValue.ToString().Substring(sensitiveAttr.Start, sensitiveAttr.Len), strSenChar), null); } } } } else if(resVal.GetType().IsClass) { var customProper = resVal.GetType().GetProperties().Where(p => p.GetCustomAttributes(typeof(SensitiveAttribute), true).Any()); foreach (var item in customProper) { var itemValue = item.GetValue(resVal, null); if (null != itemValue) { var attrName = item.GetCustomAttribute(typeof(SensitiveAttribute), true); var sensitiveAttr = (attrName as SensitiveAttribute); string strSenChar = sensitiveAttr.SensitiveReChar; for (int i = 0; i < sensitiveAttr.Len - 1; i++) { strSenChar += sensitiveAttr.SensitiveReChar; } item.SetValue(resVal, itemValue.ToString().Replace(itemValue.ToString().Substring(sensitiveAttr.Start, sensitiveAttr.Len), strSenChar), null); } } } //var customProper3 = s.GetType().GetProperties().Where(p => p.GetCustomAttributes(typeof(SensitiveAttribute), true).Any()); //var customProper2 = objectContent.Value.GetType().GetProperties().Where(p => p.GetCustomAttributes(typeof(SensitiveAttribute), true).Any()); //var customProper = res.GetType().GetProperties().Where(p => p.GetCustomAttributes(typeof(SensitiveAttribute), true).Any()); //if (!customProper.Any()) //{ // return ; //} //SensitiveAttribute sensitive = new SensitiveAttribute(); //foreach (var item in customProper) //{ // var itemValue = item.GetValue(res, null); // if (null != itemValue) // { // var attrName = item.GetCustomAttribute(typeof(SensitiveAttribute), true); // var sensitiveAttr = (attrName as SensitiveAttribute); // string strSenChar = sensitiveAttr.SensitiveReChar; // for (int i = 0; i < sensitiveAttr.Len - 1; i++) // { // strSenChar += sensitiveAttr.SensitiveReChar; // } // item.SetValue(res, itemValue.ToString().Replace(itemValue.ToString().Substring(sensitiveAttr.Start, sensitiveAttr.Len), strSenChar), null); // } //} } } base.OnActionExecuted(actionExecutedContext); } }
/// <summary> /// 数据脱敏 /// </summary> /// <param name="resVal"></param> private void GetCustom(object resVal) { if (null == resVal) { return; } if (resVal.GetType().IsGenericType) { foreach (var sou in (IEnumerable)resVal) { var customProper = sou.GetType().GetProperties().Where(p => p.CanWrite && p.GetCustomAttributes(typeof(SensitiveAttribute), true).Any()); if (!customProper.Any()) { break; } foreach (var item in customProper) { if (item.PropertyType == typeof(String) || item.PropertyType == typeof(Int32) || item.PropertyType == typeof(Decimal)) { var itemValue = item.GetValue(sou, null); if (null != itemValue) { var attrName = item.GetCustomAttribute(typeof(SensitiveAttribute), true); var sensitiveAttr = (attrName as SensitiveAttribute); string strSenChar = sensitiveAttr.SensitiveReChar; for (int i = 0; i < sensitiveAttr.Len - 1; i++) { strSenChar += sensitiveAttr.SensitiveReChar; } itemValue = itemValue.ToString().Substring(0, sensitiveAttr.Start) + strSenChar + itemValue.ToString().Substring(sensitiveAttr.Start + sensitiveAttr.Len); item.SetValue(sou, itemValue, null); } } else { GetCustom(item); } } } } else if (resVal.GetType().IsClass) { var customProper = resVal.GetType().GetProperties().ToList().Where(p => p.CanWrite && p.GetCustomAttributes(typeof(SensitiveAttribute), true).Any()); foreach (var item in customProper) { var itProp = item.PropertyType.GetProperties().ToList().Where(p => p.GetCustomAttributes(typeof(SensitiveAttribute), true).Any()); if (item.PropertyType == typeof(String)|| item.PropertyType == typeof(Int32) || item.PropertyType == typeof(Decimal)) { var itemValue = item.GetValue(resVal, null); if (null != itemValue) { var attrName = item.GetCustomAttribute(typeof(SensitiveAttribute), true); var sensitiveAttr = (attrName as SensitiveAttribute); string strSenChar = sensitiveAttr.SensitiveReChar; for (int i = 0; i < sensitiveAttr.Len - 1; i++) { strSenChar += sensitiveAttr.SensitiveReChar; } itemValue = itemValue.ToString().Substring(0, sensitiveAttr.Start) + strSenChar + itemValue.ToString().Substring(sensitiveAttr.Start + sensitiveAttr.Len); item.SetValue(resVal, itemValue.ToString(), null); } } else if (item.PropertyType.IsGenericType ||(item.PropertyType.IsClass && itProp.Any())) { GetCustom(item.GetValue(resVal, null)); } } } }
获取属性
方法一、定义一个类的对象获取
Person p = new Person(); foreach (System.Reflection.PropertyInfo info in p.GetType().GetProperties()) { Console.WriteLine(info.Name); }
方法二、通过类获取
Person p = new Person(); foreach (System.Reflection.PropertyInfo info in p.GetType().GetProperties()) { Console.WriteLine(info.Name); }
3、通过属性名获取属性值
p.Name = "张三"; var name = p.GetType().GetProperty("Name").GetValue(p, null); Console.WriteLine(name);
4、完整代码及结果显示
var properties = typeof(Person).GetProperties(); foreach (System.Reflection.PropertyInfo info in properties) { Console.WriteLine(info.Name); } Console.WriteLine("另一种遍历属性的方法："); Person p = new Person(); foreach (System.Reflection.PropertyInfo info in p.GetType().GetProperties()) { Console.WriteLine(info.Name); } Console.WriteLine("通过属性值获取属性："); p.Name = "张三"; var name = p.GetType().GetProperty("Name").GetValue(p, null); Console.WriteLine(name); Console.ReadLine();
