铸造可空布尔为bool [英] Cast nullable bool to bool

问题描述

我有一个对象AlternateName.IsMaidenName

我要强制转换成一个复选框 - IsMaidenName

它不会让我投的，因为它说无法将源类型可空目标bool类型。

我已经在我们的应用程序内的其他景点这个问题，但我想在那里把它扔出去一个更好的方式来处理这些问题。

  IsMaidenNameChecked = AlternateName.IsMaidenName; 
  

解决方案

这是很合乎逻辑，你不能施放一个可空布尔？为BOOL，因为，如果布尔有什么价值，如果可空包含空

我会怎么做，是这样的：

  IsMaidenNameChecked = AlternateName.IsMaidenName？假; 
  

I have an object AlternateName.IsMaidenName

I want to cast that to a checkbox - IsMaidenName

It wont let me cast that as it says Cannot convert source type nullable to target type bool.

I've had this issue in other spots within our application but I wanted to throw it out there for a better way to handle these issues.

IsMaidenNameChecked = AlternateName.IsMaidenName;

解决方案

It is quite logical that you cannot cast a nullable bool to a bool, since, what value should the bool have, when the nullable contains null ?

What I would do, is this:

IsMaidenNameChecked = AlternateName.IsMaidenName ?? false;

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