如何在使用ASP.NET MVC导入Excel之前删除特定表中的所有记录

Question

请在保存新记录之前，如何删除所有现有记录，刷新并重置表格。我想从我的控制器那里做到。

控制器

        public ActionResult Create(ITEM items)
    {
        try
        {
            // TODO: Add insert logic here
            if (ModelState.IsValid)
            {

                _itemsService.AddCity(thirdparties);
                return RedirectToAction("Index");
            }
        }
        catch
        {
            ModelState.AddModelError("", "We cannot add this items. Verify your data entries !");
        }

        return View(items);
    }

我有一个N层图层

1. 基础设施
2. 存储库
3. 网络（呈现

基础设施

    public interface IRepository<T> where T : class
    {
    IEnumerable<T> FindAll(Expression<Func<T, bool>> predicate = null);
    T FindById(object id);
    T FindByEntity(T entity);
    T FindByString(object strValue);
    void Add(T entity);
    void Remove(T entity);
   }


    public abstract class Repository<T> : IRepository<T> where T : class
{
    public virtual IEnumerable<T> FindAll(Expression<Func<T, bool>> predicate = null)
    {
        IQueryable<T> items = DataContextFactory.AdminEntities.Set<T>();
        return (predicate == null) ? items : items.Where(predicate);
    }

    public abstract T FindById(object id);

    public abstract T FindByString(object strValue);

    public abstract T FindByEntity(T entity);

    public virtual void Add(T entity)
    {
        DataContextFactory.AdminEntities.Set<T>().AddOrUpdate(entity);

        DataContextFactory.AdminEntities.SaveChanges();
    }

    public virtual void Remove(T entity)
    {
        T item = FindByEntity(entity);

        if (item != null)
            DataContextFactory.AdminEntities.Set<T>().Remove(item);

        DataContextFactory.AdminEntities.SaveChanges();
    }


}

存储库

    public class CitiesManager: ICitiesManager
{
    private readonly IRepository<CITIES> _citiesRepository;

    public CitiesManager(IRepository<CITIES> citiesRepository)
    {
        _citiesRepository = citiesRepository;
    }

    public CITIES City(Int32 cityID)
    {
        return _citiesRepository.FindById(cityID);
    }

    public IEnumerable<CITIES> Cities()
    {
        return _citiesRepository.FindAll().ToList();
    }

    public void AddCity(CITIES cities)
    {
        _citiesRepository.Add(cities);
    }

    public void RemoveCity(Int32 cityID)
    {
        _citiesRepository.Remove(City(cityID));
    }
}

我的模型类属于基础设施

基础设施 - ＆gt;存储库 - ＆gt;网络