demo20230512/Areas/admin/Controllers/PCRController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Data.Entity;
using Weee.DAL;
using Weee.Areas.Admin.ViewModels;
using Weee.Models;
using PagedList;

namespace Weee.Areas.Admin.Controllers
{
    public class PCRController : AdminControllerBase
    {
        public PCRController(WeeeDataContext db) : base(db)
        {
        }

        public ActionResult Index(int page = 1)
        {
            var pcrs = db.PCRs.ToList();
            var onePageOfPcrs = pcrs.ToPagedList(page, 10);
            return View(onePageOfPcrs);
        }

        public ActionResult Edit(int id, int? copyfrom)
        {
            var Copy = copyfrom == null ? new PCR() : db.PCRs.Where(x => x.ID == copyfrom).Single();
            var viewModel = id == 0 ? copyfrom == null ?
                    new PCR() :
                    new PCR()
                            {
                                DisplayNameCN = Copy.DisplayNameCN,
                                Percentage = Copy.Percentage,
                                DisplayNameTW = Copy.DisplayNameTW,
                                DisplayNameEN = Copy.DisplayNameEN,
                                Description = Copy.Description
                            } :
                    db.PCRs.Where(x => x.ID == id).Single();
            return View(viewModel);
        }

        [HttpPost]
        [Weee.Filter.MvcLog]
        public ActionResult Edit(int id, PCR viewModel)
        {
            if (ModelState.IsValid && id == viewModel.ID)
            {
                if (CheckNameExist(viewModel.DisplayNameTW, id))
                {
                    ModelState.AddModelError(string.Empty, "\"" + viewModel.DisplayNameTW + "\"已存在");
                    return View(viewModel);
                }
                db.Entry(viewModel).State = id == 0 ? EntityState.Added : EntityState.Modified;
                db.SaveChanges();
                return RedirectToAction("index");
            }
            return View(viewModel);
        }

        [HttpGet]
        [Weee.Filter.MvcLog]
        public ActionResult Delete(int id)
        {
            db.Entry(new PCR() { ID = id }).State = EntityState.Deleted;
            db.SaveChanges();

            return RedirectToAction("index");
        }

        private bool CheckNameExist(string name, int id)
        {
            var exist = (from a in db.PCRs
                         where a.DisplayNameTW == name && a.ID != id
                         select a).Any();
            return exist;
        }
    }
}