通过

GetAncestor 方法

Retrieves the SqlHierarchyId node n levels up the hierarchical tree.

命名空间：  Microsoft.SqlServer.Types
程序集：  Microsoft.SqlServer.Types（在 Microsoft.SqlServer.Types.dll 中）

语法

声明
<SqlMethodAttribute(DataAccess := DataAccessKind.None, SystemDataAccess := SystemDataAccessKind.None,  _
    InvokeIfReceiverIsNull := False, OnNullCall := False,  _
    IsDeterministic := True, IsPrecise := True, IsMutator := False)> _
Public Function GetAncestor ( _
    n As Integer _
) As SqlHierarchyId
用法
Dim instance As SqlHierarchyId
Dim n As Integer
Dim returnValue As SqlHierarchyId

returnValue = instance.GetAncestor(n)

[SqlMethodAttribute(DataAccess = DataAccessKind.None, SystemDataAccess = SystemDataAccessKind.None, 
    InvokeIfReceiverIsNull = false, OnNullCall = false, 
    IsDeterministic = true, IsPrecise = true, IsMutator = false)]
public SqlHierarchyId GetAncestor(
    int n
)

[SqlMethodAttribute(DataAccess = DataAccessKind::None, SystemDataAccess = SystemDataAccessKind::None, 
    InvokeIfReceiverIsNull = false, OnNullCall = false, 
    IsDeterministic = true, IsPrecise = true, IsMutator = false)]
public:
SqlHierarchyId GetAncestor(
    int n
)

[<SqlMethodAttribute(DataAccess = DataAccessKind.None, SystemDataAccess = SystemDataAccessKind.None, 
    InvokeIfReceiverIsNull = false, OnNullCall = false, 
    IsDeterministic = true, IsPrecise = true, IsMutator = false)>]
member GetAncestor : 
        n:int -> SqlHierarchyId 

public function GetAncestor(
    n : int
) : SqlHierarchyId

参数

  • n
    类型：System. . :: . .Int32
    An integer representing the number of levels to ascend in the hierarchy.

返回值

类型：Microsoft.SqlServer.Types. . :: . .SqlHierarchyId
SqlHierarchyId representing the nth ancestor of this.
If a number greater than GetLevel is passed, nullNothingnullptrunitnull 引用（在 Visual Basic 中为 Nothing） is returned.
If a negative number is passed, an exception is raised indicating that the argument is out of range.