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.");
}
}