Hi, @GavinCrump IronPython3 and PythonNet 3.
opened 04:17PM - 24 Mar 22 UTC
closed 09:29PM - 27 Apr 22 UTC
confirmed
### Prerequisites
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### Description
.NET property is not accessible in derived classes where only the setter or the getter has been overridden
a workaround is to use the unbound base class instance method syntax (Ipy2 or Ipy3)
### Steps to Reproduce
C# lib
```
using System;
using System.Collections.Generic;
namespace TestGetter
{
public class BaseClass
{
protected string name = "noname";
public virtual string Name
{
get { return name; }
set {name = value; }
}
}
public class DerivedClass : BaseClass
{
public override string Name
{
set { base.Name = value.ToUpper();}
}
}
}
```
Python code
```
import clr
import sys
import System
print(sys.implementation)
print(sys.version)
sys.path.append(r'C:\Users\****l\Documents\SharpDevelop Projects\TestGetter\TestGetter\bin\Debug')
clr.AddReference("TestGetter")
from TestGetter import BaseClass, DerivedClass
d = DerivedClass()
b = BaseClass()
b.Name = 'BaseClass Name'
d.Name = 'DerivedClass Name'
print("#" * 40)
print(b.Name) # ok
print("#" * 40)
try:
print(d.Name) # TypeError: property cannot be read
except:
import traceback
print(traceback.format_exc())
print("#" * 40)
try:
print(BaseClass.Name.GetValue(d)) # workaround ok
except:
import traceback
print(traceback.format_exc())
```
Result
opened 08:43PM - 13 May 21 UTC
closed 04:42PM - 04 Jan 22 UTC
bug
### Environment
- Pythonnet version: 2.5.2
- Python version: 3.7
- Op… erating System: Windows 10
- .NET Runtime: 4.8
### Details
- Let's create a simple base class that exposes a property, then create a derived class that overrides the setter, but not the getter (that is supposed to be as it was defined in the base class)
```C#
namespace PythonNetTest
{
public class BaseClass
{
protected string name = "noname";
public virtual string Name { get => name; set => name = value; }
}
public class DerivedClass : BaseClass
{
public override string Name { set => base.Name = value.ToUpper(); }
}
}
```
- Let's now use the above classes in Python
```python
import clr
clr.AddReference("PythonNetTest")
from PythonNetTest import BaseClass, DerivedClass
d = DerivedClass()
b = BaseClass()
b.Name = 'BaseClass Name'
d.Name = 'DerivedClass Name'
print(b.Name) # ok
print(d.Name) # TypeError: property cannot be read
```
- Here the `print(d.Name)` will rise the exception `TypeError: property cannot be read`.
- As a workaround it is possible to use `print(d.GetType().BaseType.GetProperty('Name').GetValue(d))` instead, but it is not one would expect.
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