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ADO 属性


❮ 完整字段对象参考

值属性设置或返回参数、字段或属性对象的値。

对象 值属性的描述
参数 值属性设置或返回一个变体,表示参数对象的値

注意: 在尝试读取值属性之前,记录集应关闭。ADO 只能从提供程序读取一次值属性

字段

值属性设置或返回一个变体,表示字段对象的当前値

注意: 对于添加到记录字段集合的新字段对象,您必须先设置值属性并执行更新,然后才能设置任何其他属性

属性 值属性设置或返回一个变体,表示属性对象的当前値

注意: 您不能设置只读属性的值


语法

objectname.Value

示例 - 对于字段对象

<%
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).Value)

rs.Close
conn.close
%>

示例 - 对于参数对象

<%
set comm=Server.CreateObject("ADODB.Command")
set para=Server.CreateObject("ADODB.Parameter")

para.Type=adVarChar
para.Size=25
para.Direction=adParamInput
para.Value=varfname

comm.Parameters.Append para
%>

示例 - 对于属性对象

<%
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

set prop=Server.CreateObject("ADODB.Property")

'显示订单表的属性
for each prop in rs.Properties
  response.write("Attr:" & prop.Attributes & "<br>")
  response.write("Name:" & prop.Name & "<br>")
  response.write("Value:" & prop.Value & "<br>")
next

rs.close
conn.close
set rs=nothing
set conn=nothing
%>

❮ 完整字段对象参考
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