public static IRuleBuilderOptions <T, TProperty> AllowedFileExtension <T, TProperty>(this IRuleBuilder <T, TProperty> ruleBuilder, AllowedExtensionsOptions options) where TProperty : IFormFile
{
return(ruleBuilder
.Must(x => !string.IsNullOrEmpty(x.FileName))
.Must(x => options.Extensions.Contains(x.FileName.Split('.').LastOrDefault()))
.WithMessage($"Filename empty or Forbidden file extension. Allowed extension: {string.Join(", ", options.Extensions)}"));
}
public FileHelper(IOptions <AllowedExtensionsOptions> options)
{
_options = options.Value;
}