public async Task <IActionResult> OnPostQueryAsync() { try { HttpClient httpclient = clientFactory.CreateClient(); SubmissionsClient client = new SubmissionsClient(httpclient); ProgrammingLanguage?lang = null; if (!string.IsNullOrEmpty(PostData.QueryLanguage)) { lang = Enum.Parse <ProgrammingLanguage>(PostData.QueryLanguage); } JudgeState?state = null; if (!string.IsNullOrEmpty(PostData.QueryJudgeState)) { state = Enum.Parse <JudgeState>(PostData.QueryJudgeState); } Core.Submissions.SubmissionMetadata[] ms = (await client.QueryAsync(PostData.Id, PostData.ProblemId, PostData.UserId, lang, state)).ToArray(); List <SubmissionModel> ss = new List <SubmissionModel>(); foreach (Core.Submissions.SubmissionMetadata v in ms) { ss.Add(await SubmissionModel.GetAsync(v, httpclient)); } Submissions = ss; } catch { Submissions = Array.Empty <SubmissionModel>(); } return(Page()); }