Vlastnost hodnoty ADO
❮ Vyplňte referenci objektu vlastnosti
Vlastnost Hodnota nastavuje nebo vrací hodnotu objektu Parametr, Pole nebo Vlastnost.
| Object | Description of the Value Property |
|---|---|
| Parameter | The Value property sets or returns a variant that
indicates the value of the Parameter object
Note: The Recordset should be closed before you try to read the Value property. ADO can only read the Value property once from the provider |
| Field | The Value property sets or returns a variant that indicates the current value of the Field object Note: For a new Field object that are added to the Fields collection of a Record, you must first set the Value property and perform an update before you can set any other property |
| Property | The Value property sets or returns a variant that
indicates the current value of the Property object
Note: You cannot set the Value for properties that are read-only |
Syntax
objectname.Value
Příklad – pro objekt Field:
<%
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
%>
Příklad – pro objekt Parametr:
<%
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
%>
Příklad – pro objekt Property:
<%
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")
'Display the property attributes of the Orders Table
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
%>
❮ Vyplňte referenci objektu vlastnosti