//删除用户一门课程
public bool DeleteUserCourse(string openId, string LessonCode)
{
try
{
_dbContext.Database.BeginTransaction();
//删除用户课程表
UserSrv userSrv = new UserSrv(_dbContext);
userSrv.DeleteUserCourse(openId, LessonCode);
//更新课程报名数
var cs = _dbContext.DbCourseSchedule.Where(a => a.LessonCode == LessonCode).FirstOrDefault();
cs.ApplyNum--;
if (cs.ApplyNum == 0)
{
TecSrv tecSrv = new TecSrv(_dbContext);
//删除老师课程
tecSrv.DeleteTecCourse(LessonCode);
}
_dbContext.SaveChanges();
_dbContext.Database.CommitTransaction();
}
catch (Exception ex)
{
_dbContext.Database.RollbackTransaction();
throw ex;
}
return(true);
}
