反射相关

1.一般反射方法： 

Type type= Type.GetType("FullClassName");
  MethodInfo methodInfo =type.GetMethod("MethedNam");
         object[] parameters;
                  foreach (var p in listPara)
             {
                 parameters[i] = p;
                 i++;
             }

         try
         {
                object o = Activator.CreateInstance(type);
            return methodInfo.Invoke(o, parameters ).ToString();

         }
         catch (Exception)
         {

             return string.Empty;
         }
       
         ///  T Get<T>() 

///{string interfaceName = typeof(T).Name;
/// T temp = (T)Assembly.Load("Dal").CreateInstance("DAL" + "." + interfaceName.Substring(1, interfaceName.Length - 1))

///}

 Express的compile方法

public Func<object, object[], object> GetDelegate()
{
    Expression<Func<object, object[], object>> exp = (instance, parameters) =>
        ((ClassName)instance).Method(parameters[0], parameters[1]);

    return exp.Compile();
}

 Emit： 代码片段

 internal static SetHandler CreateSetHandler(Type type, PropertyInfo propertyInfo)
        {
            MethodInfo setMethodInfo = propertyInfo.GetSetMethod(true);
            DynamicMethod dynamicSet = CreateSetDynamicMethod(type);
            ILGenerator setGenerator = dynamicSet.GetILGenerator();

            setGenerator.Emit(OpCodes.Ldarg_0);
            setGenerator.Emit(OpCodes.Ldarg_1);
            UnboxIfNeeded(setMethodInfo.GetParameters()[0].ParameterType, setGenerator);
            setGenerator.Emit(OpCodes.Call, setMethodInfo);
            setGenerator.Emit(OpCodes.Ret);

            return (SetHandler)dynamicSet.CreateDelegate(typeof(SetHandler));
        }
 private static DynamicMethod CreateSetDynamicMethod(Type type)
        {
            return new DynamicMethod("DynamicSet", typeof(void),
                  new Type[] { typeof(object), typeof(object) }, type, true);
        }