WPF动态更改Image控件图片路径

step 1:先搞个转换器

class ImageConvert : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            BitmapImage bi = new BitmapImage();
            // BitmapImage.UriSource must be in a BeginInit/EndInit block.
            bi.BeginInit();
            bi.UriSource = new Uri(value.ToString(), UriKind.Absolute);
            bi.EndInit();
            return bi;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return null;
        }
    }

step 2:在前台页面添加转换器到资源

    <Window.Resources>
        <local:ImageConvert x:Key="ImageConvert"/>
    </Window.Resources>

step 3:在Image中绑定源，及转换器

 <Image x:Name="img" Source="{Binding ViewConfig.HomeBgPath, Converter={StaticResource ImageConvert}}"/>

其它的点，比如Binding之类的，自行百度好啦。