I want a method to compress the large size image to a fixed smaller size before saving it to cash directory.

[MahmoudAlEssawi]

I searched a lot for that but nothing worked

[xtuzy]

cash directory? Maui.Graphics can resize image, see https://learn.microsoft.com/zh-cn/dotnet/maui/user-interface/graphics/images#resize-an-image

[MahmoudAlEssawi]

I tried Maui.Graphics but didn't work on windows and the image is rotated on android.

I need to compress the image in background without loading it on the screen.

[xtuzy]

why not try image library, like skiasharp or imagesharp, or you can search how to do on every platform, such as use java on android, convert java to c# is easy.

[MahmoudAlEssawi]

I Tried IImage Class and it works:

    private static IImage ConvertPathToIImage(Stream stream)
    {
        IImage image = null;
        if (stream != null)
        {

#if IOS || ANDROID || MACCATALYST
// PlatformImage isn't currently supported on Windows.
image = PlatformImage.FromStream(stream);
#elif WINDOWS
image = new W2DImageLoadingService().FromStream(stream);

#endif
}

        return image;
    }

    public static IImage ImageDownSize(Stream stream,float MaxWidthOrHeight = 720)
    {
        IImage image = ConvertPathToIImage(stream)??null;

        if (image != null)
        {
            var DownSizedIMG = image.Downsize(MaxWidthOrHeight);
            return DownSizedIMG;
        }
        else
        {
            return null;
        }
         
    }

    public static async Task<ImageObject> SaveIImageToImageObject(IImage image, string imagename)
    {
        if(image == null) return null;
        //var imagename = CloudKeyGeneration.GenerateKey("Image")+".Jpeg";
        var fullpath = Path.Combine(cacheDir, imagename);
        if (File.Exists(fullpath)) File.Delete(fullpath);
        using FileStream localFileStream = File.OpenWrite(fullpath);

#if WINDOWS
await image.SaveAsync(localFileStream, ImageFormat.Jpeg, 0.25f);
#else
await image.SaveAsync(localFileStream, ImageFormat.Jpeg, 0.8f);
#endif

        ImageObject imageobject = new()
        {
            IMGSource = fullpath,
            LocalFileName = imagename,
            ImageExtention = "Jpeg",
            Length = localFileStream.Length
        };
        return imageobject;
    }