我有包含以下内容的员工薪水表:
public partial class S_EmployeeSalary
{
public int SalaryId { get; set; }
public int TypeId { get; set; }
public int UserId { get; set; }
public double Salary { get; set; }
public Nullable<double> ExtraSalary { get; set; }
public Nullable<double> Insurance { get; set; }
public Nullable<double> Sanctions { get; set; }
public System.DateTime SalaryDate { get; set; }
public virtual C_UserItems C_UserItems { get; set; }
}
当用户单击它时,我有一个按钮,它会自动从上个月的记录中创建一个副本,以仅更新创建的新月的记录:
public ActionResult CreateNewRows(int typeId)
{
IQueryable<S_EmployeeSalary> moduleItems = db.S_EmployeeSalary
.Include(x => x.C_UserItems)
.Where(x => x.TypeId == typeId && DbFunctions.DiffDays(x.SalaryDate, DateTime.Now) > 30 && DbFunctions.DiffDays(x.SalaryDate, DateTime.Now) < 30);
foreach (var item in moduleItems)
{
S_EmployeeSalary entity = new S_EmployeeSalary
{
TypeId = typeId,
UserId = item.UserId,
Salary = item.Salary,
ExtraSalary = item.ExtraSalary,
Insurance = item.Insurance,
Sanctions = item.Sanctions,
SalaryDate = DateTime.Now
};
db.S_EmployeeSalary.Add(entity);
}
db.SaveChanges();
}
我的问题是我怎么能只指定上个月的记录来选择它,我尝试了DbFunctions.DiffDays,但是效果不佳,有人可以帮助我提出新的想法吗?注意员工的薪水,所以我需要上个月而不是过去30天
取决于您想要上个月还是过去30天(问题尚不清楚)
这是上个月的:
var startOfTthisMonth = new DateTime(DateTime.Today.Year, DateTime.Today.Month, 1);
var firstDay = startOfTthisMonth.AddMonths(-1);
var lastDay = startOfTthisMonth.AddDays(-1);
IQueryable<S_EmployeeSalary> moduleItems = db.S_EmployeeSalary
.Include(x => x.C_UserItems)
.Where(x => x.TypeId == typeId &&
x.SalaryDate >= firstDay &&
x.SalaryDate <= lastDay);
这是前30天的数据:
var firstDay = DateTime.Today.AddDays(-30);
IQueryable<S_EmployeeSalary> moduleItems = db.S_EmployeeSalary
.Include(x => x.C_UserItems)
.Where(x => x.TypeId == typeId &&
x.SalaryDate >= firstDay);
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