如何通过反射获取类型的所有常量？

虽然这是一个旧代码：

private FieldInfo[] GetConstants(System.Type type){    ArrayList constants = new ArrayList();    FieldInfo[] fieldInfos = type.GetFields(        // Gets all public and static fields        BindingFlags.Public | BindingFlags.Static |         // This tells it to get the fields from all base types as well        BindingFlags.FlattenHierarchy);    // Go through the list and only pick out the constants    foreach(FieldInfo fi in fieldInfos)        // IsLiteral determines if its value is written at         //   compile time and not changeable        // IsInitonly determines if the field can be set         //   in the body of the constructor        // for C# a field which is readonly keyword would have both true         //   but a const field would have only IsLiteral equal to true        if(fi.IsLiteral && !fi.IsInitOnly) constants.Add(fi);    // Return an array of FieldInfos    return (FieldInfo[])constants.ToArray(typeof(FieldInfo));}

资源

您可以使用泛型和LINQ轻松将其转换为更清晰的代码：

private List<FieldInfo> GetConstants(Type type){    FieldInfo[] fieldInfos = type.GetFields(BindingFlags.Public |         BindingFlags.Static | BindingFlags.FlattenHierarchy);    return fieldInfos.Where(fi => fi.IsLiteral && !fi.IsInitOnly).ToList();}

或一行：

type.GetFields(BindingFlags.Public | BindingFlags.Static |    BindingFlags.FlattenHierarchy)    .Where(fi => fi.IsLiteral && !fi.IsInitOnly).ToList();