Menu
×
   ❮     
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI GO KOTLIN SASS VUE DSA GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE
     ❯   

ADO 属性


❮ 完整属性对象参考

Value 属性用于设置或返回参数、字段或属性对象的的值。

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

注意: 在尝试读取 Value 属性之前,Recordset 应该关闭。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,表示字段对象的当前值

注意: 对于添加到记录的 Fields 集合中的新字段对象,您必须先设置 Value 属性并执行更新,然后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,表示属性对象的当前值

注意: 无法设置只读属性的 Value


语法

objectname.Value

示例 - 用于字段对象

<%
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 - 用于参数对象

<%
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 - 用于属性对象

<%
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 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
%>

❮ 完整属性对象参考
×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:
[email protected]

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:
[email protected]

W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2024 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.