希望写个ProgressBar的样式，在progress value不同的时候显示不同的颜色的progress bar

1.写转换器

public class ProgressBarValueConverter : IValueConverter    {        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)        {            double v = (double)value;            string imageUri = "../Images/progress bar_1.png";            if (v > 80)            {                imageUri = "../Images/progress bar_3.png";            }            else if (v > 50)            {                imageUri = "../Images/progress bar_2.png";            }            BitmapImage img = new BitmapImage(new Uri(imageUri, UriKind.Relative));            return img;        }        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)        {            throw new NotImplementedException();        }    }

2.创建样式

3.设置progress bar的style

 

progress bar.png: 

progress bar_1.png: 

progress bar_2.png:

progress bar_3.png:

 

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如果仅仅是希望创建一个扁平化的progress bar，那么连转换器都可以不用写

Flat Progress Bar.png：

Flat Progress Bar_1.png：