1、集合操作
// <summary> /// 判断一个集合是否包含某个值 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="list"></param> /// <param name="value"></param> /// <returns>返回索引值</returns> public static int IsContainValue<T>(IEnumerable<T> list, T value) { return list.ToList<T>().FindIndex(i => i.Equals(value)); }
2、反射
/// <summary> /// 实例化反射对象 /// </summary> /// <param name="t">如果类型为null，就根据对象获取类型</param> /// <param name="obj">如果对象为null，就根据类型实例化对象</param> static void JudgeType(ref Type t, ref object obj, ref BindingFlags flags, bool isPublic, bool isStatic) { if (t != null) { obj = Activator.CreateInstance(t); } else { t = obj.GetType(); } flags = (isStatic ? BindingFlags.Static : BindingFlags.Instance) | (isPublic ? BindingFlags.Public : BindingFlags.NonPublic); } /// <summary> /// 获取对象的属性或者字段的值 /// </summary> /// <param name="t">如果类型为null，就根据对象获取类型</param> /// <param name="obj">如果对象为null，就根据类型实例化对象</param> /// <param name="name">属性或者字段的名称</param> /// <param name="isPublic">是否是public修饰符修饰的</param> /// <param name="isStatic">是否是静态的</param> /// <returns>返回字段或者属性的值</returns> public static object GetFieldOrProperty(Type t, object obj, string name, bool isPublic, bool isStatic) { BindingFlags flags = BindingFlags.Default; JudgeType(ref t, ref obj, ref flags, isPublic, isStatic); FieldInfo fieldInfo = t.GetField(name, flags); if (fieldInfo == null) { PropertyInfo propertyInfo = t.GetProperty(name, flags); if (propertyInfo != null) { return propertyInfo.GetValue(obj, null); } return null; } return fieldInfo.GetValue(obj); } /// <summary> /// 反射执行对象的方法 /// </summary> /// <param name="t">如果类型为null，就根据对象获取类型</param> /// <param name="obj">如果对象为null，就根据类型实例化对象</param> /// <param name="methodName">方法名称</param> /// <param name="parameters">方法参数</param> /// <param name="isPublic">是否是public修饰符修饰的</param> /// <param name="isStatic">是否是静态的</param> public static void ExecuteMethod(Type t, object obj, string methodName, object[] parameters, bool isPublic, bool isStatic) { BindingFlags flags = BindingFlags.Default; JudgeType(ref t, ref obj, ref flags, isPublic, isStatic); MethodInfo methodInfo = t.GetMethod(methodName, flags); if (methodInfo != null) { methodInfo.Invoke(obj, parameters); } } /// <summary> /// 得到属性或者字段或者方法的特性 /// </summary> /// <param name="t">如果类型为null，就根据对象获取类型</param> /// <param name="obj">如果对象为null，就根据类型实例化对象</param> /// <param name="name">名称</param> /// <param name="isPublic">是否是public修饰符修饰的</param> /// <param name="isStatic">是否是静态的</param> /// <returns></returns> public static object[] GetCustomAttributes(Type t, object obj, string name, bool isPublic, bool isStatic) { BindingFlags flags = BindingFlags.Default; JudgeType(ref t, ref obj, ref flags, isPublic, isStatic); MethodInfo methodInfo = t.GetMethod(name, flags); if (methodInfo != null) { return methodInfo.GetCustomAttributes(false); } else { FieldInfo fieldInfo = t.GetField(name, flags); if (fieldInfo != null) { return fieldInfo.GetCustomAttributes(false); } else { PropertyInfo propertyInfo = t.GetProperty(name, flags); if (propertyInfo != null) { return propertyInfo.GetCustomAttributes(false); } return null; } } } /// <summary> /// 加载程序集，并实例化对象 /// </summary> /// <param name="dllPath">程序集路径（绝对路径）</param> /// <param name="index">为-1，表示要实例化所有对象，不为-1，表示要实例化索引为index的对象</param> /// <param name="objList">输出实例化的对象</param> /// <returns>返回所有类型</returns> public static Type[] GetTypes(string dllPath, int index, ref List<object> objList) { objList = new List<object>(); Type[] t; object obj; Assembly assembly = Assembly.LoadFile(dllPath); t = assembly.GetTypes(); if (index == -1) { foreach (var item in t) { obj = Activator.CreateInstance(item); objList.Add(obj); } } else { obj = Activator.CreateInstance(t[index]); objList.Add(obj); } return t; }
3、序列化
// JavaScriptSerializer在net3.5中已被标记“过时”,使用这个类，必须引用System.Web.Extensions.dll // 新的序列化类“DataContractJsonSerializer”，使用DataContract和DataMember特性来分别标记你要序列化的对象和成员 // 如果不想序列化某个成员，就标记为 [IgnoreDataMember] // 你可以在DataMember属性里用"Name"参数指定名称，例子如下： // [DataMember(Name = "First")] // public string FirstName { get; set; } // 序列化后的结果：{"First":"Chris","LastName":"Pietschmann"} /// <summary> /// 序列化，需要引用System.Runtime.Serialization和System.ServiceModel.Web /// </summary> /// <typeparam name="T"></typeparam> /// <param name="obj"></param> /// <returns></returns> public static string Serialize<T>(T obj) { using (MemoryStream stream = new MemoryStream()) { string result = string.Empty; DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType()); serializer.WriteObject(stream, obj); result = Convert.ToBase64String(stream.ToArray(), Base64FormattingOptions.None); return result; } } /// <summary> /// 反序列化 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="str"></param> /// <returns></returns> public static T Deserialize<T>(string str) { //T obj = Activator.CreateInstance<T>(); using (MemoryStream stream = new MemoryStream(Convert.FromBase64String(str))) { DataContractJsonSerializer deserialize = new DataContractJsonSerializer(typeof(T)); var obj = (T)deserialize.ReadObject(stream); return obj; } }
4、网页
/// <summary> /// 获取网页源文件 /// </summary> /// <param name="url"></param> /// <returns></returns> public static string GetWebContent(string url) { System.Net.WebClient wc = new System.Net.WebClient(); wc.Credentials = System.Net.CredentialCache.DefaultCredentials; return wc.DownloadString(url); } /// <summary> /// 向网页发送Post或者Get请求 /// </summary> private static CookieContainer cookie = new CookieContainer();// 主要是设置session值 public static string WebRequest(string url, bool isPost, IDictionary<string, string> parames) { HttpWebRequest webRequest = null; string param = string.Empty; foreach (var item in parames.Keys) { param += item + "=" + parames[item] + "&"; } param.TrimEnd(‘&‘); if (!isPost) url += "?" + param; webRequest = System.Net.WebRequest.Create(url) as HttpWebRequest; webRequest.Method = isPost ? "Post" : "Get"; webRequest.KeepAlive = true; webRequest.CookieContainer = cookie; webRequest.Timeout = 1000 * 60; webRequest.ContentType = "application/x-www-form-urlencoded"; if (isPost) { byte[] bs = Encoding.UTF8.GetBytes(param); webRequest.ContentLength = bs.Length; using (Stream requestWriter = webRequest.GetRequestStream()) { requestWriter.Write(bs, 0, bs.Length); } } WebResponse webResponse = webRequest.GetResponse(); //string cookieheader = webRequest.CookieContainer.GetCookieHeader(new Uri(url)); //cookie.SetCookies(new Uri(url), cookieheader); string responseData = string.Empty; using (StreamReader responseReader = new StreamReader(webResponse.GetResponseStream())) { responseData = responseReader.ReadToEnd(); } return responseData; }