The Invalid interface callback of ValidationAttribute is too lagging.

[Jason-Git123]

Describe the bug

The validation of TextBox-Text is achieved through the custom ValidationAttribute attribute marked by the bound Model attribute, but the IsValid interface of the ValidationAttribute is only called after the attribute has been updated

eg：

int m_addressLength = 32;
[Range(1, 32)]
public int AddressLength
{
get {return m_addressLength;}
set
{
m_addressLength = value;
RaisePropertyChanged(nameof(AddressLength))
}
}

To Reproduce

Is there a way to callback the ValidationAttribute-IsValid check before updating the mode property.

Expected behavior

No response

Avalonia version

e.g. 11.3.3

OS

No response

Additional context

No response

[timunie]

Personally I prefer to use the communityToolkit.MVVM package. It has a method to invalidate the validation for specific properties or all properties.

https://docs.avaloniaui.net/docs/guides/development-guides/data-validation

[timunie]

Btw: 32 is a valid value in your sample