ASP.NET MVC + EF 更新的几种方式（超赞）

1.常用

db.Entry(实体).State = EntityState.Modified;
db.SaveChanges();

2.指定更新

db.Configuration.ValidateOnSaveEnabled = false;
db.TUser.Attach(实体);
ObjectStateEntry stateEntry = ((IObjectContextAdapter)db).ObjectContext.ObjectStateManager.GetObjectStateEntry(实体);
stateEntry.SetModifiedProperty("字段1");
stateEntry.SetModifiedProperty("字段2");
db.SaveChanges();
db.Configuration.ValidateOnSaveEnabled = true;

3.指定更新(推荐!好用!)

TConsultant model = db.TConsultant.FirstOrDefault(t => t.ID == iID);
if (TryUpdateModel(model, new string[] { "Name", "Sex", "PhoneNuber", "CertificateNumber", "Email", "QQ", "Culture" }))
{
db.SaveChanges();
return Content("修改成功!");
}

4.代码部分

[HttpPost]
/// <summary>
/// 执行修改的代码
/// </summary>
/// <param name="model"></param>
/// <returns></returns>
public ActionResult Modify(BlogArticle model)
{
try
{
//1.将实体对象 a.加入 EF 对象容器中，并 b.获取 伪包装类对象
DbEntityEntry<BlogArticle> entry = db.Entry<BlogArticle>(model);
//2.将包装类对象的状态设置为 unchanged
entry.State = System.Data.EntityState.Unchanged;
//3.设置 被改变的属性
entry.Property(a => a.ATitle).IsModified = true;
entry.Property(a => a.AContent).IsModified = true;
entry.Property(a => a.ACate).IsModified = true;

//4.提交到数据库 完成修改
db.SaveChanges();
//5.更新成功，则命令浏览器 重定向 到 /Home/List 方法
return RedirectToAction("Index", "Home");
}
catch (Exception ex)
{
return Content("修改失败~~~" + ex.Message);
}
}
升级版:
db.Entry(model).State = EntityState.Unchanged;
db.Entry(model).Property(m => m.字段名).IsModified = true;
db.SaveChanges();