Beispiel #1
0
        public string UploadAvatar(IFormFile file, string key)
        {
            if (file.Length >= 300000)
            {
                throw new Exception("Uploaded image may not exceed 300 kb, please upload a smaller image.");
            }

            try
            {
                using (var readStream = file.OpenReadStream())
                {
                    using (var img = Image.FromStream(readStream))
                    {
                        if (!img.RawFormat.Equals(ImageFormat.Jpeg) && !img.RawFormat.Equals(ImageFormat.Png))
                        {
                            throw new Exception("Uploaded file is not recognized as an image.");
                        }

                        var fileName = key + ".png";

                        try
                        {
                            // Check if previous avatar exists
                            var avatar = _avatarDirectoryInfo.GetFile(fileName);
                            if (avatar.Exists)
                            {
                                // delete the file
                                avatar.Delete();
                            }

                            // finally, build the image
                            AvatarBuilder.Build(readStream, fileName);
                        }
                        catch (Exception ex)
                        {
                            throw new Exception("Uploaded file is not recognized as a valid image.", ex);
                        }

                        return(key);
                    }
                }
            }
            catch (Exception)
            {
                throw new Exception("Uploaded file is not recognized as an image.");
            }
        }