使用界面属性更新进度条视图模型

Question

这是我的代码：

    namespace ns1
    Class A()
    {
        //set interface prop value
        _progressBarListner.CurrCount =2;
        _progressBarListner.TotalCount =5;
    }

    Interface IProgressBarListner
    {
        int CurrCount {get;set;}
        int TotalCount {get;set;}
    }

    public class ProgBarViewModel : BindableBase
    {
        // binded variable to a label on progress bar
        public string ProgressPercentage
            {
                get => _progressPercentage;
                set => SetProperty(ref _progressPercentage, value);
            }

        // binded variable to value attribute of progress bar
        public double ProgressValue
        {
            get => _progressValue;
            set => SetProperty(ref _progressValue, value);
        }  

        //Instead of using this event handler, I would like to consume interface property to set 

          private void UpdateProgressBar(UpdateProgressBarArgs args)
            {                
                var percentCompleted = (args.CurrentCount / args.TotalCount) * 100;
                ProgressValue = percentCompleted;
                ProgressPercentage = string.Format(CultureInfo.InvariantCulture, "{0} %", percentCompleted.ToString("0", CultureInfo.InvariantCulture));            
            }
    }

当前，它订阅一个事件并更新进度条视图模型属性。相反，我想使用此接口属性来更新进度条视图模型。我怎么能达到同样的目的？