查询词典 nullable

You can make value types nullable using the Nullable generic type, and you can create structures that combine multiple value types.

利用 Nullable 泛型类型，你能够判断值类型是否被赋值，并且你能够建立由多种值类型组成的结构。

Optional parameters in our MVC framework are handled using nullable type arguments on Controller Action methods. Because the page parameter on our List action is a nullable int that is what "int?"

MVC 框架中的操作方法的可选参数使用 nullable 类型的参数，因为 List 方法的页码参数是可选参数

Since a non-nullable value type can never be set to a null reference, when a class member of such a type is mapped to an XML element declaration, the

由于永远不能将不可为空值类型设置为空引用，因此，在将此种类型的类成员映射到XML元素声明时

This is fine for any value type except nullable types.

这是对任何类型的外空值类型的罚款。

As you might know, this behavior can be changed explicitly with the use of boost::nullable .

你可能也知道，这一行为可以用 boost：：nullable 来改变。

NET 2.0, if you add nullable="true" to a schema element,.

NET 2.0的，如果您添加空=&真&的架构元素。

NET will wrap it in a nullable type.

NET将包装在一个可空类型。

For everything else, we can do ToString and it will be OK, but for nullable types, we have to invoke the HasValue property of the type.

对于一切，我们可以做的toString，它将被确定，但空类型，我们必须援引类型HasValue属性。

When an object field needs to be changed in any way, be it the data type, name, nullable, etc., simply change the model and re-generate.

当一个对象字段需要改变以任何方式，无论是数据类型，名称，空，等等，简单地改变模型和重新生成。

IND_COL as the column is nullable as we may miss some rows.

IND_COL 上的索引，因为可空列的索引会使我们丢掉一些记录。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。