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Refresh method example (VBScript)

Applies to: Access 2013 | Access 2016

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="https://<%=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 thecurrent 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>&nbsp;</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 'ExecuteOptionsDim FO 'FetchOptions
EO = "adcExecSync" 'Default valueFO = "adcFetchBackground" 'Default value 
Sub SetExO(NewEO)EO = NewEO
End Sub 
Sub SetFO(NewFO)FO = NewFO
End Sub 
' Set parameters of RDS.DataControl at Run TimeSub Run_OnClick
RDC.Server = txtServer.ValueRDC.SQL = txtSQL.Value
RDC.Connect = txtConnect.ValueIf EO = "adcExecSync" Then 'Determine which ExecuteOption chosen
RDC.ExecuteOptions = adcExecSyncMsgBox "Recordset brought in on current calling thread Synchronously"
ElseRDC.ExecuteOptions = adcExecAsync
MsgBox "Recordset brought in on another thread Asynchronously"End If 
If FO = "adcFetchBackground" Then 'Determine 'which FetchOption chosenRDC.FetchOptions = adcFetchBackground
MsgBox "Control goes back to user after first batch of records returned"ElseIf FO = " adcFetchUpFront" Then
RDC.FetchOptions = adcFetchUpFrontMsgBox "All records returned before control goes back to user"
ElseRDC.FetchOptions = adcFetchAsync
MsgBox "Control goes back to user immediately"End If 
RDC.RefreshEnd Sub
--></Script> 
</body></html>
<!-- EndRefreshVBS -->

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