Api.RetrieveColumnSize 方法 (JET_SESID、JET_TABLEID、JET_COLUMNID、Int32、RetrieveColumnGrbit)

项目
06/13/2023

从当前记录中检索单个列值的大小。记录是与光标当前位置的索引项关联的记录。或者，此函数可以从在游标复制缓冲区中创建的记录中检索列。此函数还可以从引用当前记录的索引项中检索列数据。

Namespace：Microsoft.Isam.Esent.Interop
装配： Microsoft.Isam.Esent.Interop.dll) 中的 Microsoft.Isam.Esent.Interop (

语法

'Declaration
Public Shared Function RetrieveColumnSize ( _
    sesid As JET_SESID, _
    tableid As JET_TABLEID, _
    columnid As JET_COLUMNID, _
    itagSequence As Integer, _
    grbit As RetrieveColumnGrbit _
) As Nullable(Of Integer)
'Usage
Dim sesid As JET_SESID
Dim tableid As JET_TABLEID
Dim columnid As JET_COLUMNID
Dim itagSequence As Integer
Dim grbit As RetrieveColumnGrbit
Dim returnValue As Nullable(Of Integer)

returnValue = Api.RetrieveColumnSize(sesid, _
    tableid, columnid, itagSequence, _
    grbit)

public static Nullable<int> RetrieveColumnSize(
    JET_SESID sesid,
    JET_TABLEID tableid,
    JET_COLUMNID columnid,
    int itagSequence,
    RetrieveColumnGrbit grbit
)