图片从MediaLibrary到Base64字符串

Question

I have the following code to retrieve a picture from camera roll:

private string getBase64Image(Geophoto item)
{
    MediaLibrary mediaLibrary = new MediaLibrary();
    var pictures = mediaLibrary.Pictures;
    foreach (var picture in pictures)
    {
        var camerarollPath = picture.GetPath();
        if (camerarollPath == item.ImagePath)
        {
            // Todo Base64 convert here
        }
    }

    return "base64";
}

My question is now how to convert a Picture to a Base64 string?

Answer 1

Get the Stream from the Picture instance using the GetStream method. Get the byte array from the stream. Convert bytes into the Base64 string using the Convert.ToBase64String method.

Stream imageStream = picture.GetImage();
using (var memoryStream = new MemoryStream())
{
    imageStream.CopyTo(memoryStream);
    byte[] buffer = memoryStream.ToArray();
    // this is the Base64 string you are looking for
    string base64String = Convert.ToBase64String(buffer);
}