Covert xamarin.image into base 64 format

Question

I need to Convert a xamarin forms image into a base64 format, Can anyone help me with this?

This is how i've being trying to do it, but it doesent work.

var inputStream = signatureImage.Source.GetValue(UriImageSource.UriProperty);

            //Getting Stream as a Memorystream
            var signatureMemoryStream = inputStream as MemoryStream;

            if (signatureMemoryStream == null)
            {
                signatureMemoryStream = new MemoryStream();
                inputStream.CopyTo(signatureMemoryStream);
            }

            //Adding memorystream into a byte array
            var byteArray = signatureMemoryStream.ToArray();

            //Converting byte array into Base64 string
            base64String = Convert.ToBase64String(byteArray);

"signatureImage" is the image name.

Have a look at http://stackoverflow.com/questions/33947138/convert-image-into-byte-array-in-xamarin-forms — Rohit Vipin Mathews, Aug 24 '16 at 07:30
Thanks for the reply, but how can i pass a file path? The image is in XAML where the image source is being set from data taken from a signature pad. — anslem arnolda, Aug 24 '16 at 07:34

score 6 · Answer 1 · answered May 27 '17 at 21:48

Once you get your file path , you can use the following code that worked for me.

var stream = file.GetStream();
var bytes = new byte [stream.Length];
await stream.ReadAsync(bytes, 0, (int)stream.Length);
string base64 = System.Convert.ToBase64String(bytes);

I found it here

score 0 · Answer 2 · edited May 23 '17 at 12:08

Image is just a control in Xamarin forms to display the image. It is not something from which you can get your image byte array out.

You will be better of using the Media Plugin and save it to disk. Then load it via memory stream and convert.

You can also use FFImageLoading. It has 2 methods which can be of use for you :

The SO question - Convert Image into byte array in Xamarin.Forms shows how to do it in Platform specific code here.

The forum thread (Convert Image to byte[]) has a good discussion on why you can't get it from the control.

Thanks for the reply, But isnt there any other way that i could get the image from the XAML and and convert it to a byte array other than saving and getting it? — anslem arnolda, Aug 24 '16 at 07:39

score 0 · Answer 3 · answered Nov 18 '20 at 18:39

0

You can do this as below as well

var base64String = Convert.ToBase64String(File.ReadAllBytes(file.Path))

answered Nov 18 '20 at 18:39

Argon

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Covert xamarin.image into base 64 format

3 Answers3