(no subject)

I will hidden an object, say StudentPrimaryKey,
which definition is the following,

public class StudentCoursePrimartKey(
  private String StudentID;
  private Integer itemno;
 
  public StudentCoursePrimartKey(String StudentID,
                                 Integer itemno){
  ...
  } 
}   

My page specification like this,
...
<component id="primaryKey" type="Hidden">
   <binding name="value" expression="primaryKey"/>
        <field-binding name="encode"
field-name="Boolean.TRUE"/>
      </component>
...

After the form submits, the primaryKey is still null,
why?

Anyway, how to define its component specification when
I want to hidden an specific object.

Thanks

Frank


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