C
C#•7mo ago
SWEETPONY

Is it possible to update public IReadOnlyList?

There is public IReadOnlyList<ISelectionNode> Selections { get; } from public api I know it is not a good idea but I want to extend it. Is it possible?
4 Replies
Angius
Angius•7mo ago
With reflections, maybe Get the list normally, turn it into a regular list, append to it Then turn it into a readonly list again and use reflections to change the value of this property to that new list
SWEETPONY
SWEETPONYOP•7mo ago
hm I tried this: 
var newSelections = new List<ISelectionNode>(node.SelectionSet!.Selections) 
{                                                                           
    new FieldNode("test")                                                   
}.AsReadOnly();                                                             
                                                                            
var selectionSetProperty = node.GetType().GetProperty("SelectionSet");      
var selectionSet = selectionSetProperty?.GetValue(node);                    
var selectionsProperty = selectionSet?.GetType().GetProperty("Selections"); 
                                                                            
if(selectionsProperty != null)                                              
{                                                                           
    selectionsProperty.SetValue(selectionSet, newSelections);               
}                                                                           
var newSelections = new List<ISelectionNode>(node.SelectionSet!.Selections) 
{                                                                           
    new FieldNode("test")                                                   
}.AsReadOnly();                                                             
                                                                            
var selectionSetProperty = node.GetType().GetProperty("SelectionSet");      
var selectionSet = selectionSetProperty?.GetValue(node);                    
var selectionsProperty = selectionSet?.GetType().GetProperty("Selections"); 
                                                                            
if(selectionsProperty != null)                                              
{                                                                           
    selectionsProperty.SetValue(selectionSet, newSelections);               
}
but got an exception "Property set method not found." in the last line
Angius
Angius•7mo ago
Angius
Angius•7mo ago
You need to save the data in the backing field directly selectionProperty.GetBackingField().SetValue(selectionSet, newSelections)

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