替换实体框架对象

替换实体框架对象

本文介绍了替换实体框架对象的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述



在MVC应用程序中,我有一个用于经典视图/编辑/创建模式的大对象。当用户编辑对象时,将其保存为:

  public bool SetMyObject(MyObject newObject){
MyObject current = GetObjectById(newObject.Id);
current.Prop1 = newObject.Prop1
...
current.PropN = newObject.PropN
db.SaveChanges();
}

MyObject很大,所以我想知道有没有更好的方法来做,不涉及每个财产分配。例如, db.MyObject.UpdateObject(current,tnew)



Ty。

解决方案

您可以使用方法。



  public bool SetMyObject(MyObject newObject)
{
db.ApplyPropertyChanges(MyObjectSet,newObject);
db.SaveChanges();
}

(其中MyObjectSet是对象的实体集的名称属于)


In MVC app, I am having this big object that is used in classic view/edit/create pattern.

When user edits the object I save it as:

  public bool SetMyObject(MyObject newObject) {
     MyObject current = GetObjectById(newObject.Id);
     current.Prop1 = newObject.Prop1
     ...
     current.PropN = newObject.PropN
     db.SaveChanges();
  }

MyObject is pretty big so I am wondering is there any better way to do this, not involving per-property assignments. For instance something along the lines db.MyObject.UpdateObject(current, tnew).

Ty.

解决方案

You can use the ApplyPropertyChanges method.

public bool SetMyObject(MyObject newObject)
{
    db.ApplyPropertyChanges("MyObjectSet", newObject);
    db.SaveChanges();
}

(where "MyObjectSet" is the name of the entity set to which the object belongs)

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08-04 06:10