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ADO DefinedSizeActualSize 属性


❮ 完整字段对象参考

DefinedSize 属性返回一个长整型值,表示字段的定义大小(以字节为单位)。

ActualSize 属性是一个只读属性。它返回一个长整型值,表示字段值的实际长度。如果 ADO 无法确定 Field 对象值的长度,则返回 adUnknown。

DefinedSize 属性定义字段值可以有多长,而 ActualSize 表示字段值实际有多长。


语法

objrs.Fields(number).DefinedSize

objrs.Fields(number).ActualSize

示例

<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open "c:/webdata/northwind.mdb"

set rs=Server.CreateObject("ADODB.Recordset")
rs.open "Select * from orders", conn

response.write(rs.Fields(0).DefinedSize)
response.write(rs.Fields(0).ActualSize)

rs.Close
conn.close
%>

❮ 完整字段对象参考
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