| RDS 2.5 API Reference |  |
Refresh Method Example (VBScript)
The following example shows how to set the necessary parameters of RDS.DataControl at run time. The manner in which a Recordset is retrieved using the Refresh method is determined by the settings of the ExecuteOptions and FetchOptions properties. To test this example, cut and paste the following code into a normal ASP document and name it RefreshVBS.asp. Use Find to locate the file Adovbs.inc and place it in the directory you plan to use. ASP script will identify your server.
<!-- BeginRefreshVBS -->
<%@ Language=VBScript %>
<!--use the following META tag instead of adovbs.inc-->
<!--METADATA TYPE="typelib" uuid="00000205-0000-0010-8000-00AA006D2EA4" -->
<html>
<head>
<meta name="VI60_DefaultClientScript" content=VBScript>
<meta name="GENERATOR" content="Microsoft Visual Studio 6.0">
<title>Refresh Method Example (VBScript)</title>
<style>
<!--
body {
font-family: 'Verdana','Arial','Helvetica',sans-serif;
BACKGROUND-COLOR:white;
COLOR:black;
}
.thead {
background-color: #008080;
font-family: 'Verdana','Arial','Helvetica',sans-serif;
font-size: x-small;
color: white;
}
.thead2 {
background-color: #800000;
font-family: 'Verdana','Arial','Helvetica',sans-serif;
font-size: x-small;
color: white;
}
.tbody {
text-align: center;
background-color: #f7efde;
font-family: 'Verdana','Arial','Helvetica',sans-serif;
font-size: x-small;
}
-->
</style>
</head>
<body>
<h1>Refresh Method Example (VBScript)</h1>
<H2>RDS API Code Examples </H2>
<HR>
<TABLE DATASRC=#RDC>
<TR>
<TD> <INPUT DATAFLD="FirstName" SIZE=15> </TD>
<TD> <INPUT DATAFLD="LastName" SIZE=15> </TD>
<TD> <INPUT DATAFLD="Title" SIZE=15> </TD>
<TD> <INPUT DATAFLD="HireDate" SIZE=15> </TD>
</TR>
</TABLE>
<!-- RDS.DataControl with no parameters set at design time -->
<OBJECT classid="clsid:BD96C556-65A3-11D0-983A-00C04FC29E33"
ID=RDC HEIGHT=1 WIDTH=1>
</OBJECT>
<HR>
Server: <Input Size=70 Name="txtServer" Value="http://<%=Request.ServerVariables("SERVER_NAME")%>"><BR>
Connect: <Input Size=70 Name="txtConnect" Value="Provider='sqloledb';Integrated Security='SSPI';Initial Catalog='Northwind'"><BR>
SQL: <Input Size=70 Name="txtSQL" Value="Select * from Employees">
<HR>
<TABLE BORDER=1 WIDTH="60%">
<TR>
<TD COLSPAN=3 BGCOLOR=silver>
Choose if you want the Recordset brought back Synchronously on the
current calling thread or Asynchronously on another thread.
</TD>
</TR>
<TR>
<TD>Synchronously: <BR>
<Input Type="Radio" Name="optExecuteOptions" Checked OnClick="SetExO('adcExecSync')">
</TD>
<TD>Asynchronously: <BR>
<Input Type="Radio" Name="optExecuteOptions" OnClick="SetExO('adcExecAsync')">
</TD>
<TD> </TD>
</TR>
<TR>
<TD COLSPAN=3 BGCOLOR=silver>
Fetch Up Front, Background Fetch with Blocking or Background Fetch
without Blocking
</TD>
<TR>
<TD>Up Front:<BR>
<Input Type="Radio" Name="optFetchOptions" OnClick="SetFO('adcFetchUpFront')">
</TD>
<TD>Background w/ Blocking:<BR>
<Input Type="Radio" Name="optFetchOptions" Checked OnClick="SetFO('adcFetchBackground')">
</TD>
<TD>Background w/o Blocking:<BR>
<Input Type="Radio" Name="optFetchOptions" OnClick="SetFO('adcFetchAsync')">
</TD>
</TR>
</TABLE>
<INPUT TYPE=BUTTON NAME="Run" VALUE="Run"><BR>
<Script Language="VBScript">
<!--
Dim EO 'ExecuteOptions
Dim FO 'FetchOptions
EO = "adcExecSync" 'Default value
FO = "adcFetchBackground" 'Default value
Sub SetExO(NewEO)
EO = NewEO
End Sub
Sub SetFO(NewFO)
FO = NewFO
End Sub
' Set parameters of RDS.DataControl at Run Time
Sub Run_OnClick
RDC.Server = txtServer.Value
RDC.SQL = txtSQL.Value
RDC.Connect = txtConnect.Value
If EO = "adcExecSync" Then 'Determine which ExecuteOption chosen
RDC.ExecuteOptions = adcExecSync
MsgBox "Recordset brought in on current calling thread Syncronously"
Else
RDC.ExecuteOptions = adcExecAsync
MsgBox "Recordset brought in on another thread Asyncronously"
End If
If FO = "adcFetchBackground" Then 'Determine ‘which FetchOption chosen
RDC.FetchOptions = adcFetchBackground
MsgBox "Control goes back to user after first batch of records returned"
ElseIf FO = " adcFetchUpFront" Then
RDC.FetchOptions = adcFetchUpFront
MsgBox "All records returned before control goes back to user"
Else
RDC.FetchOptions = adcFetchAsync
MsgBox "Control goes back to user immediately"
End If
RDC.Refresh
End Sub
-->
</Script>
</body>
</html>
<!-- EndRefreshVBS -->
See Also
DataControl Object (RDS) | ExecuteOptions Property (RDS) | FetchOptions Property (RDS) | Recordset Object | Refresh Method