/// <summary>
/// 更新给定的用户提交记录实体数据。
/// </summary>
/// <param name="entity">要更新的用户提交记录实体数据。</param>
/// <exception cref="ArgumentNullException"/>
/// <exception cref="InvalidOperationException"/>
/// <remarks>
/// 若给定的用户提交记录实体数据不在数据库中，抛出 InvalidOperationException 异常。
/// </remarks>
public void UpdateSubmissionEntity(SubmissionEntity entity)
{
if (entity == null)
{
throw new ArgumentNullException(nameof(entity));
}
SubmissionEntity target = Submissions.Find(entity.Id);
if (target == null)
{
throw new InvalidOperationException("给定的用户提交记录实体未在数据库中找到。");
}
// 更新用户提交记录实体数据。
target.CodeFilename = entity.CodeFilename;
target.CreationTimestamp = entity.CreationTimestamp;
target.Language = entity.Language;
target.ProblemId = entity.ProblemId;
target.RemoteSubmissionId = entity.RemoteSubmissionId;
target.Username = entity.Username;
target.VerdictResult = entity.VerdictResult;
target.VerdictStatus = entity.VerdictStatus;
target.VerdictTimestamp = entity.VerdictTimestamp;
SaveChanges();
}
/// <summary>
/// 使用给定的提交 ID 查询提交实体对象。
/// </summary>
/// <param name="id">提交ID。</param>
/// <returns>用户提交实体对象。若给定的提交 ID 不存在于数据集中，返回 null。</returns>
public SubmissionEntity QuerySubmissionEntityById(int id)
{
return(Submissions.Find(id));
}
//***************************************************************
//Name: FindSubmission()
//Purpose: This method takes the assignment name as a parameter.It should
// return the Submission with the given assignment name.If it is
// not found then return null.
//Input Type: string asn - assignment name
//Output Type: Submission - returns submission object or null
//***************************************************************
public Submission FindSubmission(string asn)
{
Submission result = Submissions.Find(x => x.AssignmentName == asn);
return(result);
}