reflection

问题 Let's say I have retrieved a System.Type object using reflection and want to use that type to convert a List<Object> into another List of that type. If I try: Type type = GetTypeUsingReflection(); var myNewList = listObject.ConvertAll(x => Convert.ChangeType(x, type)); I get an exception since the object does not implement the IConvertible interface. Is there a way around this or another way to approach this problem? 回答1: Type type = typeof(int); // could as well be obtained by Reflection var

问题 Strange behavior when comparing two string properties with the usage of reflection. var a = new A { X = "aa", B = 1 }; var b = new A { X = "aa", B = 2 }; Type type = typeof(A); object aObjValue = type.GetProperty("X")?.GetValue(a); object bObjValue = type.GetProperty("X")?.GetValue(b); Console.WriteLine("aObjValue == bObjValue : " + (aObjValue == bObjValue)); Console.WriteLine("aObjValue.Equals(bObjValue) : " + aObjValue.Equals(bObjValue)); a.X = Console.ReadLine(); aObjValue = type

问题 Strange behavior when comparing two string properties with the usage of reflection. var a = new A { X = "aa", B = 1 }; var b = new A { X = "aa", B = 2 }; Type type = typeof(A); object aObjValue = type.GetProperty("X")?.GetValue(a); object bObjValue = type.GetProperty("X")?.GetValue(b); Console.WriteLine("aObjValue == bObjValue : " + (aObjValue == bObjValue)); Console.WriteLine("aObjValue.Equals(bObjValue) : " + aObjValue.Equals(bObjValue)); a.X = Console.ReadLine(); aObjValue = type

问题 I got an issue. In Unity I want to reflect into a private field. But I always get null for the fieldinfo. what am I doing wrong? public abstract class _SerializableType { [SerializeField] private string name; } // because I am using a CustomPropertyDrawer for all inherited from _SerializeType public class SerializableType<T> : _SerializableType { } public class SerializableType : _SerializableType { } [Serializable] public class CTech : SerializableType<_CouplingTechnology> { } so using this

问题 Using .Net 3.5 I have a Range Attributes (System.ComponentModel.DataAnnotations) on a Property... [Range(0, 5, ErrorMessage = "Weight must be between 0 and 5")] public virtual double Weight{ get; set; } And I have a Validate method in the class that checks validation attributes... protected virtual void Validate() { var type = this.GetType(); foreach (var property in type.GetProperties()) { foreach (ValidationAttribute attribute in property.GetCustomAttributes(typeof(ValidationAttribute),true

问题 Using .Net 3.5 I have a Range Attributes (System.ComponentModel.DataAnnotations) on a Property... [Range(0, 5, ErrorMessage = "Weight must be between 0 and 5")] public virtual double Weight{ get; set; } And I have a Validate method in the class that checks validation attributes... protected virtual void Validate() { var type = this.GetType(); foreach (var property in type.GetProperties()) { foreach (ValidationAttribute attribute in property.GetCustomAttributes(typeof(ValidationAttribute),true

问题 As a followup to this question I have now come to the problem of being able to get the Type of a type that is defined by the user in his own solution. Using the standard mscorlib types, everything works. The question is very easy: how can I get this type from an assembly that I will only know at runtime? As described in the comments here: Also, what do you mean by "extracting the type"? You mean getting the Reflection type? There's no good helper, partly because (typically) you can never

问题 As a followup to this question I have now come to the problem of being able to get the Type of a type that is defined by the user in his own solution. Using the standard mscorlib types, everything works. The question is very easy: how can I get this type from an assembly that I will only know at runtime? As described in the comments here: Also, what do you mean by "extracting the type"? You mean getting the Reflection type? There's no good helper, partly because (typically) you can never

问题 I would like to run a Main class with exec-maven-plugin and from my dependencies generate documentation like a swagger file. The annotation that I care is javax.ws.rs.Path which has @Retention(RetentionPolicy.RUNTIME) My Java code public class ContextClassReader extends ClassReader { private static final ExtensibleClassLoader CLASS_LOADER = new ExtensibleClassLoader(); public ContextClassReader(final String className) throws IOException { super(CLASS_LOADER.getResourceAsStream(className

问题 I would like to ask how to achieve the following in Scala. Consider scala> case class C(i:Int) defined class C scala> val c = C(1) c: C = C(1) Given a field of interest, in this case scala> val fname = "i" fname: String = i we would like to retrieve the original value and type of field i in c. A first, naive, attempt included the following, scala> val f = c.getClass.getDeclaredField(fname) f: java.lang.reflect.Field = private final int C.i scala> f.setAccessible(true) scala> f.getType res3: