WPF Image

后台设置Image的Souce

方法一：

BitmapImage imgSource = new BitmapImage(new Uri("location",UriKind.Relative));
Image image = new Image();
image.Souce = imgSource;

方法二：

MemoryStream ms = new MemoryStream();
----初始化ms------
BitmapImage imgSource = new BitmapImage();
imgSouce.BeginInit();
imgSouce.StreamSouce = new MemoryStream(ms.ToArray());
imgSouce.EndInit();
Image image = new Image();
image.Souce = imgSource;

　　　　

参考：http://www.360doc.com/content/13/0514/12/12098313_285327507.shtml

https://www.cnblogs.com/Big-Head/p/12068230.html

使用Rectangle+ImageBrush来代替Image，解决图片模糊的问题

参考：https://www.cnblogs.com/tommy-huang/p/4974677.html

“正由另一进程使用，因此该进程无法访问该文件”的问题解决方法

https://www.cnblogs.com/ZXdeveloper/p/3779755.html

Image 图片模糊处理

<Rectangle x:Name="rectangle" HorizontalAlignment="Left" Height="{TemplateBinding Height}" Width="140" Margin="7,0,0,0" Stroke="{x:Null}" RenderTransformOrigin="0.5,0.5">
    <Rectangle.RenderTransform>
        <TransformGroup>
            <ScaleTransform/>
            <SkewTransform/>
            <RotateTransform/>
            <TranslateTransform/>
        </TransformGroup>
    </Rectangle.RenderTransform>
    <Rectangle.Fill>
        <ImageBrush ImageSource="pack://application:,,,/images/demo.png"/>
    </Rectangle.Fill>
</Rectangle>

 

异步加载网络图片

示例调用：

<Window xmlns:cvt="clr-namespace:Micro.Converter;assembly=Micro.Common" ...>
<Window.Resources>
    <cvt:BitmapImageConverter x:Key="BitmapImageConverter"/>
</Window.Resources>
<Grid>
　　<Image Source="{Binding HeadUrl,IsAsync=True,Converter={StaticResource BitmapImageConverter}}" Stretch="Fill"/>
</Grid>
</Window>

 

 C# 转换器

namespace Micro.Converter
{
    /// <summary>
    /// 加载网络图片
    /// </summary>
    public class BitmapImageConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value == null) return null;

            string imageUrl = value.ToString();
            if (String.IsNullOrEmpty(imageUrl)) return new BitmapImage(new Uri(@"pack://application:,,,/icons/logo32x32.png"));

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(imageUrl);
            WebResponse response = request.GetResponse();
            System.Drawing.Image img = System.Drawing.Image.FromStream(response.GetResponseStream());
            Bitmap bitMap = new Bitmap(img);
            return BitmapToBitmapImage(bitMap);
        }
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
        public BitmapImage BitmapToBitmapImage(Bitmap bitmap)
        {
            Bitmap bitmapSource = new Bitmap(bitmap.Width, bitmap.Height);
            int i, j;
            for (i = 0; i < bitmap.Width; i++)
                for (j = 0; j < bitmap.Height; j++)
                {
                    System.Drawing.Color pixelColor = bitmap.GetPixel(i, j);
                    System.Drawing.Color newColor = System.Drawing.Color.FromArgb(pixelColor.R, pixelColor.G, pixelColor.B);
                    bitmapSource.SetPixel(i, j, newColor);
                }
            MemoryStream ms = new MemoryStream();
            bitmapSource.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
            BitmapImage bitmapImage = new BitmapImage();
            bitmapImage.BeginInit();
            bitmapImage.StreamSource = new MemoryStream(ms.ToArray());
            bitmapImage.EndInit();
            return bitmapImage;
        }
    }
}