CODEWITHSUNDEEP
c#fieldinfo
Cherno
Cherno

Reputation: 69

GetValue() from a variable field inside a class

Suppose I have a simple class:

 public class TestScript : MonoBehaviour {
      public Vector3 myVector3;
 }

Now I want to iterate through an the fields of an instance of this class and to access the fields of this field (Field-Ception!) and assign the values to variables of the right Type, effectively "wrapping" the field so it can be serialized. Here, I would reach the Vector3 field "myVector3" and upon reaching it, go over it's fields and assign their Values to three floats (what a Vector3 is made up of).

Problem? fieldinfo.GetValue() returns the Type MonoField! If I use fieldinfo.FieldType, it returns Vector3, but that doesn't help me as I need the Value :/

TestScript myTestScript;//an instance of the MonoBehaviour class
const BindingFlags flags = BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance;
 //the fields... only 1 in this case (myVector3)
 FieldInfo[] fields = myTestScript.GetType().GetFields(flags);

 //store Type...
 var tp = myTestScript.GetType();
 //iterate over the fields
 foreach FieldInfo field in fields) {

      if (field != null) {
           //check if the field is of Type Vector3
           if(field.FieldType == typeof(Vector3)) {
                const BindingFlags flags_v3 = BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance;
                //the following will give me an array of FieldInfo 
                //with Type MonoField, but I need the 
                //actual x, y and z (floats) fields!
                FieldInfo[] fields_v3 = field.GetType().GetFields(flags);
                //added with edit:
                foreach(FieldInfo field_v3 in fields_v3) {
                    object value = field_v3 .GetValue(field)//the line in question... Since field.GetType returns MonoFields instead of the Vector3, I can not access the Vector3 Type's x y z fields/values.
                }
           }
      }
 }

Upvotes: 0

Views: 1948

Answers (1)

IS4
IS4

Reputation: 13207

field.GetType() returns the type of the actual reflection object, which is MonoField, in this case. Use field.FieldType, this property contains the type of the value stored in the field itself:

FieldInfo[] fields_v3 = field.FieldType.GetFields(flags);

Upvotes: 1

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