public bool IsValid()
{
if (RawFile != null)
{
Filename = Filename ?? RawFile.FileName;
using (var stream = new MemoryStream())
{
RawFile.CopyTo(stream);
FileBytes = stream.ToArray();
var data = Convert.ToBase64String(FileBytes);
var index = data.LastIndexOf("base64", StringComparison.Ordinal);
Data = index == -1 ? data : data.Substring(index + 7);
}
}
if (string.IsNullOrEmpty(FileType))
{
if (!string.IsNullOrEmpty(Filename))
{
FileType = Path.GetExtension(Filename).ToLower();
}
if (string.IsNullOrEmpty(FileType))
{
var match = Regex.Match(Data, "data:(.*?);");
if (!match.Success)
{
return(false);
}
FileType = match.Groups[1].Value;
}
}
if (string.IsNullOrEmpty(FileType))
{
return(false);
}
return(true);
}
