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ADO 属性


❮ 参数对象完整参考

Value 属性用于设置或返回 Parameter、Field 或 Property 对象的值。

对象 Value 属性的描述
参数 Value 属性用于设置或返回一个变体,表示 Parameter 对象的值

注意:在尝试读取 Value 属性之前,应先关闭记录集。ADO 只能从提供程序中读取一次 Value 属性

字段

Value 属性用于设置或返回一个变体,表示 Field 对象的当前值

注意:对于添加到 Record 的 Fields 集合中的新 Field 对象,必须先设置 Value 属性并执行更新,才能设置任何其他属性

属性 Value 属性用于设置或返回一个变体,表示 Property 对象的当前值

注意:您不能为只读属性设置 Value


语法

objectname.Value

示例 - 对于 Field 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 Parameter 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 Property 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 Orders 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
%>

❮ 参数对象完整参考
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