■ 리플렉션 박싱없이 비공개 필드 값을 구하는 방법을 보여준다.
▶ Program.cs
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using System; using System.Reflection; using System.Reflection.Emit; namespace TestProject { /// <summary> /// 프로그램 /// </summary> class Program { //////////////////////////////////////////////////////////////////////////////////////////////////// Delegate ////////////////////////////////////////////////////////////////////////////////////////// Private #region 값 구하기 대리자 - GetValueDelegate<T>(sourceInstance) /// <summary> /// 값 구하기 대리자 /// </summary> /// <typeparam name="T">값 타입</typeparam> /// <param name="sourceInstance">소스 인스턴스</param> /// <returns>값</returns> private delegate T GetValueDelegate<T>(object sourceInstance); #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 값 /// </summary> private int value = 5; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Private #region 프로그램 시작하기 - Main() /// <summary> /// 프로그램 시작하기 /// </summary> private static void Main() { Console.Title = "리플렉션 박싱없이 비공개 필드 값 구하기"; Program program = new Program(); program.value = 10; int value = GetNonPublicFieldValue<int>(program, "value"); Console.WriteLine("value 속성 : {0}", value); } #endregion #region 비공개 필드 값 구하기 - GetNonPublicFieldValue<TField>(sourceInstance, fieldName) /// <summary> /// 비공개 필드 값 구하기 /// </summary> /// <typeparam name="TField">필드 값 타입</typeparam> /// <param name="sourceInstance">소스 인스턴스</param> /// <param name="fieldName">필드명</param> /// <returns>필드 값</returns> private static TField GetNonPublicFieldValue<TField>(object sourceInstance, string fieldName) { FieldInfo fieldInfo = typeof(Program).GetField(fieldName, BindingFlags.Instance | BindingFlags.NonPublic); DynamicMethod dynamicMethod = new DynamicMethod ( Guid.NewGuid().ToString(), typeof(TField), new Type[] { typeof(object) }, sourceInstance.GetType(), false ); ILGenerator generator = dynamicMethod.GetILGenerator(); generator.Emit(OpCodes.Ldarg_0); generator.Emit(OpCodes.Ldfld, fieldInfo); generator.Emit(OpCodes.Ret); GetValueDelegate<TField> getValueDelegate = (GetValueDelegate<TField>)dynamicMethod.CreateDelegate(typeof(GetValueDelegate<TField>)); TField result = getValueDelegate(sourceInstance); return result; } #endregion } } |
