Gets a value indicating whether the SqlHierarchyId is nullnull 引用（在 Visual Basic 中为 Nothing）.
命名空间： Microsoft.SqlServer.Types
程序集： Microsoft.SqlServer.Types（在 Microsoft.SqlServer.Types.dll 中）
语法
声明
Public ReadOnly Property IsNull As Boolean
Get
用法
Dim instance As SqlHierarchyId
Dim value As Boolean
value = instance.IsNull
public bool IsNull { get; }
public:
virtual property bool IsNull {
bool get () sealed;
}
abstract IsNull : bool
override IsNull : bool
final function get IsNull () : boolean
属性值
类型：System.Boolean
Boolean representing true (1) if the SqlHierarchyId node is nullnull 引用（在 Visual Basic 中为 Nothing）; otherwise, false (0).
实现
注释
This member is virtual.