/// <summary>
/// 更新一条题目类型种类
/// </summary>
/// <param name="entity">题目类型种类实体</param>
/// <returns>是否成功更新</returns>
public static IMethodResult AdminUpdateProblemCategory(ProblemCategoryEntity entity)
{
if (!AdminManager.HasPermission(PermissionType.ProblemManage))
{
throw new NoPermissionException();
}
if (entity.TypeID <= 0)
{
return(MethodResult.InvalidRequest(RequestType.ProblemCategory));
}
if (String.IsNullOrEmpty(entity.Title))
{
return(MethodResult.FailedAndLog("Problem category title cannot be NULL!"));
}
Boolean success = ProblemCategoryRepository.Instance.UpdateEntity(entity) > 0;
if (!success)
{
return(MethodResult.FailedAndLog("No problem category was updated!"));
}
ProblemCategoryCache.RemoveProblemCategoryListCache();//删除缓存
return(MethodResult.SuccessAndLog("Admin update problem category, id = {0}", entity.TypeID.ToString()));
}
/// <summary>
/// 使用指定的题目 ID 查询该题目的类别实体对象数据。
/// </summary>
/// <param name="problemId">要查询的题目的题目 ID 。</param>
/// <returns>一个列表，该列表包含了给定题目的所有类别实体对象。</returns>
/// <exception cref="ArgumentNullException"/>
public IList <ProblemCategoryEntity> QueryProblemCategoryEntities(string problemId)
{
if (problemId == null)
{
throw new ArgumentNullException(nameof(problemId));
}
// 将 problemId 处理为大写表示以方便数据库查询。
problemId = problemId.ToUpper();
// 收集 problemId 所对应的题目的类别对象的主键值。
var entities = from item in Relations
where item.ProblemId == problemId
select item.CategoryId;
// 查询类别对象主键值并得到类别实体对象。
List <ProblemCategoryEntity> ret = new List <ProblemCategoryEntity>();
foreach (int id in entities)
{
ProblemCategoryEntity item = QueryCategoryEntity(id);
if (item != null)
{
ret.Add(item);
}
}
return(ret);
}
/// <summary>
/// 将给定的题目类别实体对象添加至数据集中。
/// </summary>
/// <param name="entity">要添加的题目类别实体对象。</param>
/// <exception cref="ArgumentNullException"/>
public void AddProblemCategory(ProblemCategoryEntity entity)
{
if (entity == null)
{
throw new ArgumentNullException(nameof(entity));
}
Categories.Add(entity);
}
/// <summary>
/// 题目分类添加页面
/// </summary>
/// <returns>操作后的结果</returns>
public ActionResult CategoryAdd()
{
ProblemCategoryEntity entity = new ProblemCategoryEntity()
{
Order = 255
};
return(View("CategoryEdit", entity));
}
/// <summary>
/// 从数据集中移除给定题目类别实体对象。
/// </summary>
/// <param name="entity">要移除的题目类别实体对象。</param>
/// <exception cref="ArgumentNullException"/>
public void RemoveCategoryEntity(ProblemCategoryEntity entity)
{
if (entity == null)
{
throw new ArgumentNullException(nameof(entity));
}
Categories.Remove(entity);
SaveChanges();
}
public ActionResult CategoryAdd(FormCollection form)
{
ProblemCategoryEntity entity = new ProblemCategoryEntity()
{
Title = form["title"],
Order = form["order"].ToInt32(0)
};
return(ResultToMessagePage(ProblemCategoryManager.AdminInsertProblemCategory, entity, "Your have added problem category successfully!"));
}
public ActionResult CategoryEdit(Int32 id, FormCollection form)
{
ProblemCategoryEntity entity = new ProblemCategoryEntity()
{
TypeID = id,
Title = form["title"],
Order = form["order"].ToInt32(0)
};
return(ResultToMessagePage(ProblemCategoryManager.AdminUpdateProblemCategory, entity, "Your have edited problem category successfully!"));
}
/// <summary>
/// 将给定的题目类别实体对象添加到数据集中。
/// </summary>
/// <param name="entity">要添加的题目类别实体对象。</param>
/// <exception cref="ArgumentNullException"/>
public void AddProblemCategoryEntity(ProblemCategoryEntity entity)
{
if (entity == null)
{
throw new ArgumentNullException(nameof(entity));
}
entity.Name = entity.Name.ToUpper();
Categories.Add(entity);
SaveChanges();
}
/// <summary>
/// 根据ID得到题目类型种类实体
/// </summary>
/// <param name="id">题目类型种类ID</param>
/// <returns>题目类型种类实体</returns>
public static IMethodResult AdminGetProblemCategory(Int32 id)
{
if (!AdminManager.HasPermission(PermissionType.ProblemManage))
{
throw new NoPermissionException();
}
if (id <= 0)
{
return(MethodResult.InvalidRequest(RequestType.ProblemCategory));
}
ProblemCategoryEntity entity = ProblemCategoryRepository.Instance.GetEntity(id);
if (entity == null)
{
return(MethodResult.NotExist(RequestType.ProblemCategory));
}
return(MethodResult.Success(entity));
}
/// <summary>
/// 增加一条题目类型种类
/// </summary>
/// <param name="entity">题目类型种类实体</param>
/// <returns>是否成功增加</returns>
public static IMethodResult AdminInsertProblemCategory(ProblemCategoryEntity entity)
{
if (!AdminManager.HasPermission(PermissionType.ProblemManage))
{
throw new NoPermissionException();
}
if (String.IsNullOrEmpty(entity.Title))
{
return(MethodResult.FailedAndLog("Problem category title cannot be NULL!"));
}
Boolean success = ProblemCategoryRepository.Instance.InsertEntity(entity) > 0;
if (!success)
{
return(MethodResult.FailedAndLog("No problem category was added!"));
}
ProblemCategoryCache.RemoveProblemCategoryListCache();//删除缓存
return(MethodResult.SuccessAndLog("Admin add problem category, title = {0}", entity.Title));
}
