private async void ButtonCommit_Click(object sender, RoutedEventArgs e) { ButtonCommit.IsEnabled = false; var gradeStr = TextBoxGrade.Text; if (string.IsNullOrEmpty(gradeStr)) { State.AddMessage = "参数不能为空"; ButtonCommit.IsEnabled = true; return; } if (SelectorViewModel.StudentIndex <= 0 || SelectorViewModel.CourseIndex <= 0) { State.AddMessage = "学生或者课程必选"; ButtonCommit.IsEnabled = true; return; } if (double.TryParse(gradeStr, out double grade)) { if (grade < 0 || grade > 100) { State.AddMessage = "成绩必须在0-100之间"; ButtonCommit.IsEnabled = true; return; } var response = await HttpClient.AddReportAsync( SelectorViewModel.Students[SelectorViewModel.StudentIndex].Sno, SelectorViewModel.Courses[SelectorViewModel.CourseIndex].Cono, grade ); if (response.Code == System.Net.HttpStatusCode.OK) { State.AddMessage = "添加成功"; ButtonCommit.IsEnabled = true; await Task.Delay(3000); PageNavigator.PopupClose(); } else { State.AddMessage = response.Msg; ButtonCommit.IsEnabled = true; } } else { State.AddMessage = "输入不符合数字"; ButtonCommit.IsEnabled = true; return; } ButtonCommit.IsEnabled = true; }