INullable INullable INullable INullable Interface

定義

所有的 System.Data.SqlTypes 物件和結構都會實作 INullable 介面。All the System.Data.SqlTypes objects and structures implement the INullable interface.

public interface class INullable
public interface INullable
type INullable = interface
Public Interface INullable
衍生

備註

SqlTypes可以包含 null 值, 並使用資料庫的語義來評估 null。SqlTypes can contain the value null and use database semantics for evaluating nulls. Null 是在資料庫中用來表示未知或遺漏值。Nulls are used in a database to indicate an unknown or missing value.

屬性

IsNull IsNull IsNull IsNull

指出結構是否為 null。Indicates whether a structure is null. 這個屬性是唯讀的。This property is read-only.

適用於

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