AOP面向切面編程
阿新 • • 發佈:2017-05-08
文件 library 執行方法 color ise cati 字符 arm ado
首先是下載準備好三個dll類庫
Microsoft.Practices.EnterpriseLibrary.PolicyInjection.dll
Microsoft.Practices.Unity.dll
Microsoft.Practices.Unity.Interception.dll
第二步、將三個dll文件,包含進項目的DLL類庫文件夾,然後在項目中引用它們三個。
第三步、定義一個Handler類
using System; using System.Collections.Generic; using System.Linq; using System.Text;using Microsoft.Practices.Unity.InterceptionExtension; namespace Aop { public class Handler : ICallHandler { public int Order { get; set; } public string MethodName { get; set; }
// input是方法的參數,getNext是要執行的方法 public IMethodReturn Invoke(IMethodInvocation input, GetNextHandlerDelegate getNext) { Console.WriteLine("攔截方法前的邏輯" + MethodName); var inputs = input.Inputs; if (inputs.Count > 0) { for (int i = 0; i < inputs.Count; i++) { Console.WriteLine("參數:" + Serializer.ToJson(inputs[i])); } }var returnmsg = getNext()(input, getNext); return returnmsg; } } }
2)頂一個一個HandlerAttr.cs類
using System; using System.Collections.Generic; using System.Linq; using System.Text; using Microsoft.Practices.Unity.InterceptionExtension; using Microsoft.Practices.Unity; namespace Aop { public class HandlerAttr : HandlerAttribute { public string MethodName { get; set; } public override ICallHandler CreateHandler(IUnityContainer container) { return new Handler() { MethodName = this.MethodName }; } } }
3)一個其他的幫助類,提前已經準備好了。
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace Aop { /// <summary> /// 強類型JSON序列化幫助類 /// </summary> public class Serializer { /// <summary> /// 序列化目標對象 /// </summary> /// <typeparam name="T">對象類型</typeparam> /// <param name="obj">對象實例</param> /// <returns>Json字符串</returns> public static string ToJson<T>(T obj) { if (obj == null) return string.Empty; System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(obj.GetType()); MemoryStream ms = new MemoryStream(); serializer.WriteObject(ms, obj); string retVal = System.Text.Encoding.UTF8.GetString(ms.ToArray()); ms.Dispose(); return retVal; } /// <summary> /// 反序列化json字符為對象實例 /// </summary> /// <typeparam name="T">目標對象類型</typeparam> /// <param name="json">json字符串</param> /// <returns>對象實例</returns> public static T ToObject<T>(string json) { T obj = Activator.CreateInstance<T>(); MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(json)); System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(obj.GetType()); obj = (T)serializer.ReadObject(ms); ms.Close(); ms.Dispose(); return obj; } } }
4)給一個方法標記上特性
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Aop { public class Parm { public string Key { get; set; } } public interface ITest { void Method(string str); void Method2(Parm p); } public class Test : MarshalByRefObject, ITest { [HandlerAttr(MethodName = "Method註解")] public void Method(string str) { Console.WriteLine(string.Format("這是Method(),參數是:{0}", str)); } [HandlerAttr(MethodName = "Method2註解")] public void Method2(Parm p) { Console.WriteLine("這是Method2()"); } } }
5)調用執行方法,查看切面代碼是否執行。
using System; using System.Collections.Generic; using System.Linq; using System.Text; using Microsoft.Practices.EnterpriseLibrary.PolicyInjection; namespace Aop { class Program { static void Main(string[] args) { try { Test test = PolicyInjection.Create<Test>(); test.Method("A"); test.Method2(new Parm() { Key = "A" }); } catch (Exception ex) { } finally { Console.ReadLine(); } } } }
AOP面向切面編程