/// <summary>
/// 统计人员流动情况
/// </summary>
/// <param name="dt">统计时间，以该时间为基准，统计包括该月在内的近一年的情况</param>
/// <param name="departmentID">部门编号</param>
/// <returns>到统计时间为止，近一年的人员流动情况</returns>
/// <param name="accountoperator"></param>
public List <EmployeeComeAndLeave> ComeAndLeaveStatistics(DateTime dt, int departmentID, Account accountoperator)
{
List <Employee> allEmployeeSource = new GetEmployee().GetAllEmployeeBasicInfo();
List <EmployeeComeAndLeave> employeeComeAndLeaveList = new List <EmployeeComeAndLeave>();
dt = new DateTime(dt.Year, dt.Month, 1); //定位到dt当月第一天，如2009-3-1
List <Employee> endDtEmployeeList = null;
for (int i = 11; i >= 0; i--) //从前面第11个月开始计算
{
DateTime thisMonthlastDate = dt.AddMonths(-i).AddMonths(1).AddDays(-1); //这个月最后一天
List <Employee> outEndDtEmployeeList;
EmployeeComeAndLeave employeeComeAndLeave =
ComeAndLeaveStatisticsOnlyOneMonth(thisMonthlastDate, departmentID, accountoperator,
endDtEmployeeList, out outEndDtEmployeeList, allEmployeeSource);
endDtEmployeeList = outEndDtEmployeeList;//为了支持ComeAndLeaveStatisticsOnlyOneMonth被单独调用，且endDtEmployeeList不要重复读取数据
//endDtEmployeeList 此值要被带入下一个循环中
employeeComeAndLeaveList.Add(employeeComeAndLeave);
}
return(employeeComeAndLeaveList);
}
