CODEWITHSUNDEEP
c#reflection
ca9163d9
ca9163d9

Reputation: 29159

PropertyInfo.SetValue ArgumentException?

I have the following code. However, it has a runtime exception on SetValue. What may cause the error?

var _filter = new Filter(....); // Filter implemented IFilter
ApplyFilter(_view.Name, x => x.Name); 

private void ApplyFilter<T>(T curr, Expression<Func<IFilter, T>> prev) 
{
    var expr = (MemberExpression)prev.Body;
    var prop = (PropertyInfo)expr.Member;
    if (!EqualityComparer<T>.Default.Equals(curr, (T)_filter[prop.Name]))
    {
        prop.SetValue(_filter, curr, null); // Error
        ..... // do something on _filter

The exception is:

System.ArgumentException was unhandled
  Message=Property set method not found.
  Source=mscorlib
  StackTrace:
       at System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture)
       at System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, Object[] index)
       at MyApp.ErrorLogPresenter.ApplyFilter[T](T curr, Expression`1 prev) in d:\....cs:line 50

Upvotes: 0

Views: 1580

Answers (1)

Marc Gravell
Marc Gravell

Reputation: 1062492

Message=Property set method not found.

This usually simply means that the property you are using does not define a setter. Either ensure that a suitable setter exists, or use a different approach to assign values.

Upvotes: 4

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