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  • EF实体的部分更新

    实现实体的部分更新
    假设实体InfoHotel如下:

    public class InfoHotel

    {

      public int Id{get;set;}

      public string Name{get;set;}

      public string Address{get;set;

      public string Other1{get;set};

      public string Other1{get;set};

      public string Other2{get;set};

      public string Other3{get;set};

    }

    有个网页仅仅修改Name和Address,保存的Action如下

    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Edit([Bind(Include = "Id,Name,Address")] InfoHotel item)
    {
      if (ModelState.IsValid)
      {
        var oldItem = db.InfoHotels.Find(this.KeyCorp);
        oldItem.Name = item.Name;
        oldItem.Address = item.KeyCardRW;
        oldItem.KeyPms = item.KeyPms;
        db.SaveChanges();
        return RedirectToAction("Index");
      }
      return View(item);
    }

    比较麻烦,可以改成

    public ActionResult Edit([Bind(Include = "Id,Name,Address")] InfoHotel item)
    {
      if (ModelState.IsValid)
      {
        var oldItem = db.InfoHotels.Find(this.KeyCorp)
    db.Entry(oldItem).CurrentValues.SetValues(item);
        db.SaveChanges();
        return RedirectToAction("Index");
      }
      return View(item);
    }

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  • 原文地址:https://www.cnblogs.com/catzhou/p/7821482.html
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