[英]entity framework override property get
I have an entity named Product, with a property of ProductCode. 我有一个名为Product的实体,具有ProductCode的属性。 I would like to transparently maintain a prefix on the ProductCode property, which is invisible to the rest of the application, but is maintained in the entity.
我想透明地在ProductCode属性上维护一个前缀,该前缀对于应用程序的其余部分不可见,但在实体中维护。
I can do this to set the prefix: 我可以这样做来设置前缀:
partial void OnProductCodeChanged()
{
if (EntityState != System.Data.EntityState.Detached)
{
if (this.ProductCode.Length == 11)
{
this.ProductCode = "AAA" + this.ProductCode;
}
}
}
This works, but how can I override the get of ProductCode to automatically strip the "AAA" prefix when the object is fetched? 这行得通,但是在获取对象时,如何覆盖ProductCode的获取以自动去除“ AAA”前缀?
Why not add an internal property like this 为什么不添加这样的内部属性
internal string InternalProductCode
{
get
{
return String.Format("AAA-{0}",this.ProductCode);
}
}
then use that when you need the prefixed code... 然后在需要前缀代码时使用它...
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