Web API Save base64 Image string in database using code first

Step 1: Add following method in your web api controller class:

[AllowAnonymous]
        [Route("SaveImage")]
        public async Task<IHttpActionResult> SaveImage(ImageModel image)
        {
            SweepsContext context = new SweepsContext();
            context.Images.Add(new Image
            {
                MimeType = image.MimeType,
                Data = Convert.FromBase64String(image.ImageString),
                Name = image.Name
            });
            context.SaveChanges();

            return Ok();
        }

Step 2: Create ImageModel named model in your Models folder as following.

public class ImageModel
{
    public string Name { get; set; }
    public string MimeType { get; set; }
    public string ImageString { get; set; }
}

Step 3: Create Image class in your entities folder or where ever you are saving your code first entities.

 public class Image
    {
        [Key]
        public int Id { get; set; }
        public string Name { get; set; }
        public string MimeType { get; set; }
        public byte[] Data { get; set; }
    }

Step 4: Add following action in MVC controller.

   public ActionResult Image(int id)
        {
            YourContext context = new YourContext();
            var image = context.Images.FirstOrDefault(x => x.Id == id);
            return new FileContentResult(image.Data, image.MimeType);
        }