.NET默认值属性 [英] .NET DefaultValue attribute
问题描述
我听到人们说关于默认值属性包括一些不同的东西：
I've heard people say a few different things about the DefaultValue attribute including:
- 它集之前什么都使用它的属性的值。
- 它不适合autoproperties工作。
- 这只是用来装饰的，你必须手动设置实际的默认值。
- "It sets the value of the property before anything else uses it."
- "It doesn't work for autoproperties."
- "It's only for decoration. You must manually set actual default values."
哪个（如果有的话）是正确的？请问默认值实际设置的默认值？有没有情况下，它不工作？难道只是最好不要用它？
Which (if any) is right? Does DefaultValue actually set default values? Are there cases where it doesn't work? Is it best just not to use it?
推荐答案
在这里我通常使用的地方默认值是反序列化的XML类这是串行/。它的不实例化过程中设置的默认值，不会影响autoproperties。
The place where I typically used DefaultValue is for classes which are serialized/deserialized to XML. It does not set the default value during instantiation and doesn't impact autoproperties.
从MSDN：
一个DefaultValueAttribute不会导致成员被自动与属性的值初始化。您必须设置的初始值在code。
A DefaultValueAttribute will not cause a member to be automatically initialized with the attribute's value. You must set the initial value in your code.
编辑：罗兰指出，随着人在他们的答案中提到的属性也使用窗体设计器
As Roland points out, and as others mentioned in their answers the attribute is also used by the Form Designer
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