/// <summary>
/// 领取教材的数量
/// </summary>
/// <param name="textbookId"></param>
/// <returns></returns>
public int ReleaseCount(Guid textbookId)
{
var records = ReleaseRecords.Where(t => t.Textbook_Id == textbookId);
if (records == null || records.Count() == 0)
{
return(0);
}
else
{
var count = records.Sum(t => t.ReleaseCount);
return(count);
}
}
/// <summary>
/// 是否领过教材
/// </summary>
/// <param name="textbook"></param>
/// <returns></returns>
public bool HasTextbook(Guid textbookId)
{
var result = ReleaseRecords.FirstOrDefault(t => t.Textbook_Id == textbookId);
return(result == null ? false : true);
}
