c# – Reflection.Emit私有字段/属性访问

我正在使用Reflection.Emit来动态生成字段的getter.到目前为止,我的代码适用于我测试的所有情况,除非该字段不公开.当字段不公开时,调用委托会抛出“System.NullReferenceException：Object reference not not set to object of object”.

我正在使用此代码生成:(字段是FieldInfo)

DynamicMethod dm = new DynamicMethod(String.Concat ("_Set",field.Name,"_"),typeof(void),new Type[] { typeof(object),typeof(object) },field.DeclaringType,true);
ILGenerator generator = dm.GetILGenerator ();

generator.Emit (OpCodes.Ldarg_0);
generator.Emit (OpCodes.Ldarg_1);
if (field.FieldType.IsValueType)
    generator.Emit (OpCodes.Unbox_Any,field.FieldType);
generator.Emit (OpCodes.Stfld,field);
generator.Emit (OpCodes.Ret);

return (Action<object,object>)dm.CreateDelegate (typeof(Action<object,object>));

var field = this.GetType().GetField("someField",BindingFlags.NonPublic | BindingFlags.Instance);

var field = this.GetType().GetField("someField",BindingFlags.NonPublic | BindingFlags.Static);