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Asked: 2026-05-11T11:29:18+00:00

I have a generic class that I am using Reflection to pull out the

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I have a generic class that I am using Reflection to pull out the properties of the type of the generic and looking for an attribute. I am recursing into each property to do the same for each of their properties. My issue is when I come to some sort of collection property (property that is a collection) or ICollection property. I will not be able to cast the value returned from GetValue into a specific type (tried to cast into IEnumerable but does not work for generic IEnumerables).

Here is some code to help understand a little more:

 public class NotificationMessageProcessor<T> : INotificationProcessor<T>     {           IList<string> availableTags = new List<string>();            public string ReplaceNotificationTags<T>(string message, T instance)           {               LoadTagValues(instance);              return ReplaceTags(message);            }            private string ReplaceTags(string message)           {              foreach (KeyValuePair<string, string> tagVal in tagValues)              {                  message = message.Replace(string.Format('<{0}>', tagVal.Key),     tagVal.Value);              }              return message;           }            private void LoadTagValues(object val)           {               Type elementType = val.GetType();               PropertyInfo[] typeProperties = elementType.GetProperties();               foreach (PropertyInfo prop in typeProperties)               {                   NotificationTag[] tags =      (NotificationTag[])prop.GetCustomAttributes(typeof(NotificationTag), false);                 if (tags != null && tags.Length > 0)                 {                     string tagName = tags[0].TagName;                     object propValue = prop.GetValue(val, null);                     string propTypeString = prop.PropertyType.FullName;                     tagName = prop.ReflectedType.Name + '.' + tagName;                     if (propValue != null)                     {                       tagValues.Add(tagName, propValue.ToString());                     }                      if (propValue != null)                     {                        if (!prop.PropertyType.IsPrimitive)                        {                          LoadTagValues(propValue);                        }                     }                 }                 else                 {                    if (!prop.PropertyType.IsPrimitive)                    {                      object propValue = null;                          if (prop.GetGetMethod().GetParameters().Count() == 0)                         {                             propValue = prop.GetValue(val, null);                         }                         else                         {                            //have a collection...need to process but do not know how many in collection....                                 propValue = prop.GetValue(val, new object[] { 0 });                          }                     if (propValue != null)                     {                         LoadTagValues(propValue);                     }                 }             }         }     }      NotificationMessageProcessor<User> userProcessor = new NotificationMessageProcessor();     userProcessor.ReplaceNotificationTags<User>(someMessage, instanceOfUser);

The User object has the proper attributes

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1 Answer

  1. I am doing the cast to IEnumerable, I was trying to cast the wrong object when I was having issues.

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