//答题
public async Task <IActionResult> OnPostAsync(SetStudentAnswerDto setStudentAnswerModel)
{
if (!TryValidateModel(setStudentAnswerModel))
{
return(BadRequest(ModelState));
}
var htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(setStudentAnswerModel.Answer);
var imgs = htmlDoc.DocumentNode.SelectNodes("//img");
if (imgs != null)
{
foreach (var img in imgs)
{
img.AddClass("img-fluid d-block mx-auto img-responsive center-block");
img.SetAttributeValue("style", "width:90%");
}
setStudentAnswerModel.Answer = htmlDoc.DocumentNode.OuterHtml;
}
var result = await TaskService.SetStudentAnswerAsync(setStudentAnswerModel);
if (!result.Succeeded)
{
ModelState.AddModelError(string.Empty, result.ErrorMessage);
return(BadRequest(ModelState));
}
return(Content("OK"));
}
/// <summary>
/// 学生答题
/// </summary>
/// <param name="taskId"></param>
/// <param name="taskAnswer"></param>
/// <returns></returns>
public async Task <Result> SetStudentAnswerAsync(SetStudentAnswerDto model)
{
Result response = new Result();
do
{
//学生任务表查找这个任务
var studentTask = await context.StudentTasks.FirstOrDefaultAsync(e => e.TaskId == model.TaskId && e.StudentId == model.StudentId);
if (studentTask == null)
{
response.ErrorMessage = "学生表不存在任务";
break;
}
if (studentTask.IsTeacherModified)
{
response.ErrorMessage = "教师已经批改，不能答题了";
break;
}
//教师表查找这个任务
var teacherTask = await context.TeacherTasks.FirstOrDefaultAsync(e => e.Id == model.TaskId);
if (teacherTask == null)
{
response.ErrorMessage = "教师表不存在任务";
break;
}
///超过答题时间了
if (DateTime.Now > teacherTask.TaskEndTime || DateTime.Now < teacherTask.TaskStartTime)
{
response.ErrorMessage = "不在答题时间内，不能答题";
break;
}
//已经答过了 不能重复答题
//if (task.DateTime != DateTime.MinValue)
//{
// response.ErrorMessage = "已经答过了，不能重复答题";
// break;
//}
studentTask.StudentAnswer = model.Answer.Trim(); //答案
studentTask.DateTime = DateTime.Now; //答题时间
studentTask.IsAlreadyAnswered = true; //设置已经答题
await context.SaveChangesAsync();
response.Succeeded = true;
} while (false);
return(response);
}
public async Task <IActionResult> OnGetAsync()
{
if (string.IsNullOrEmpty(TaskId))
{
return(BadRequest());
}
//根据作业id和学生id获取作业
StudentTaskInfo = await TaskService.GetStudentTasks()
.FirstOrDefaultAsync(e => e.TaskId == TaskId &&
e.StudentId == CurUserId).ConfigureAwait(false);
if (StudentTaskInfo == null)
{
return(NotFound());
}
TaskInfo = await TaskService.GetTeacherTaskByIdAsync(TaskId);
if (TaskInfo == null)
{
return(NotFound());
}
CourseInfo = await CourseService.GetCourseByIdAsync(TaskInfo.CourseId);
if (CourseInfo == null)
{
return(NotFound());
}
//学生答题
setStudentAnswerModel = new SetStudentAnswerDto
{
TaskId = TaskId,
StudentId = CurUserId,
Answer = StudentTaskInfo.StudentAnswer
};
if (!string.IsNullOrEmpty(TaskInfo.Files))
{
Files = Newtonsoft.Json.JsonConvert.DeserializeObject <List <dynamic> >(TaskInfo.Files);
}
return(Page());
}
