asp.net core 检测上传文件为图片格式
#region 检测图片格式
var validMimeTypes = new[] { "image/jpeg", "image/png", "image/gif" };
if (!validMimeTypes.Contains(upload.ContentType.ToLowerInvariant()))
{
return "{\"uploaded\": 0,\"error\": {\"message\": \"请上传图片格式\"}}";
}
#endregion