Delphi对象持久化，最好的方法是什么 [英] Delphi object persistence, what is the best way

问题描述

我已经开发了绘制一些形状的应用程序（主要是线条），现在我需要能够将草图存储到文件中，我知道delphi已经建立了用于对象持久化的例程，但是我从来没有使用过。有人可以告诉我可以使用对象持久性，如果我必须持久化对象，并引用其他对象（将被存储到），我有TLine对象可以连接到其他TLine对象等。

最好使用此功能或编写自定义过程来存储/读取对象到/从文件。

thx

解决方案

过去使用的一种方法是存储我的对象编写一个XML文件中的属性，编写一个添加到传递的IXMLNode的自定义保存例程，以及一个从传递的IXMLNode读取的新构造函数。我将组件存储为一个节点，属性作为属性（除非属性是另一个对象，那么它将是一个子节点）。

我相信有一些例程在Delphi Jedi项目中，它将为您处理组件流，但是我没有直接使用它们，因为我的XML流已经完成了，因为我的对象非常简单，只能使用少量属性渲染。 p>

I have developed application for drawing some shapes (lines mostly) , now i need to be able to store sketch to a file, i know that delphi has build in routines for object persistance, but i have never used it.

Can someone tell me can object persistence be used if i have to persist object that have also references to other objects (that will be stored to), i have TLine object wich can be connected to other TLine object etc.

Is it better to use this feature or write custom procedure to store/read object to/from file.

thx

解决方案

One method that I have used in the past is to store my object properties in an XML file writing a custom "save" routine which adds to a passed IXMLNode, and a new constructor which reads from a passed IXMLNode. I store component as a node, and the properties as attributes (unless the property is another object, then it would be a child node).

I believe there are some routines in the Delphi Jedi project which will handle component streaming for you, but I have not used them directly as most of my XML streaming has been done by hand since my objects were extremely simple and could be rendered with only a handful of properties.

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