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Move Method Example (VBScript)

This example uses the Move method to position the record pointer, based on user input.

Use the following example in an Active Server Page (ASP). To view this fully functional example, you must either have the data source AdvWorks.mdb (installed with the SDK) located at C:\Program Files\Microsoft Platform SDK\Samples\DataAccess\Rds\RDSTest\advworks.mdb or edit the path in the example code to reflect the actual location of this file. This is a Microsoft Access database file.

Use Find to locate the file Adovbs.inc and place it in the directory you plan to use. Cut and paste the following code to Notepad or another text editor, and save it as MoveVBS.asp. You can view the result in any browser.

Try entering a letter or noninteger to see the error handling work.

<!-- BeginMoveVBS -->
<%@ Language=VBScript %>
<%' use this meta tag instead of adovbs.inc%>
<!--METADATA TYPE="typelib" uuid="00000205-0000-0010-8000-00AA006D2EA4" -->
<HTML>
<HEAD>
<TITLE>ADO Move Methods</TITLE>
<STYLE>
<!--
BODY {
   font-family: "MS SANS SERIF",sans-serif;
    }
.thead1 {
   background-color: #008080; 
   font-family: 'Arial Narrow','Arial',sans-serif; 
   font-size: x-small;
   color: white;
   }
.tbody { 
   text-align: center;
   background-color: #f7efde;
   font-family: 'Arial Narrow','Arial',sans-serif; 
   font-size: x-small;
    }
-->
</STYLE>
</HEAD>
<BODY> 
<H3>ADO Move Methods</H3>
<% ' to integrate/test this code replace the 
   ' Data Source value in the Connection string%>
<% 
    ' connection and recordset variables
    Dim Cnxn, strCnxn
    Dim rsCustomers, strSQLCustomers

    ' open connection
    Set Cnxn = Server.CreateObject("ADODB.Connection")
    strCnxn = "Provider='sqloledb';Data Source=" & _
            Request.ServerVariables("SERVER_NAME") & ";" & _
            "Integrated Security='SSPI';Initial Catalog='Northwind';"

    Cnxn.Open strCnxn
        
     ' create and open Recordset using object refs
    Set rsCustomers = Server.CreateObject("ADODB.Recordset")
    strSQLCustomers = "Customers"
    
    rsCustomers.ActiveConnection = Cnxn
    rsCustomers.CursorLocation = adUseClient
    rsCustomers.CursorType = adOpenKeyset
    rsCustomers.LockType = adLockOptimistic
    rsCustomers.Source = strSQLCustomers
    rsCustomers.Open

    'Check number of user moves this session and increment by entry
    Session("Clicks") = Session("Clicks") + Request.Form("MoveAmount")
    Clicks = Session("Clicks")
    ' Move to last known recordset position plus amount passed 
    rsCustomers.Move CInt(Clicks)

    'Error Handling
    If rsCustomers.EOF Then
        Session("Clicks") = rsCustomers.RecordCount
        Response.Write "This is the Last Record"
        rsCustomers.MoveLast
    ElseIf rsCustomers.BOF Then
        Session("Clicks") = 1
        rsCustomers.MoveFirst
        Response.Write "This is the First Record"
    End If
    %>

    <H3>Current Record Number is <BR>
    <% 
    If Session("Clicks") = 0 Then Session("Clicks") = 1
    Response.Write(Session("Clicks") )%> of <%=rsCustomers.RecordCount%></H3>
    <HR>


    <TABLE COLSPAN=8 CELLPADDING=5 BORDER=0>

    <!-- BEGIN column header row for Customer Table-->

    <TR CLASS=thead1>
       <TD>Company Name</TD>
       <TD>Contact Name</TD>
       <TD>City</TD>
    </TR>
        <% 'display%>
        <TR CLASS=tbody>
          <TD> <%= rsCustomers("CompanyName")%> </TD>
          <TD> <%= rsCustomers("ContactName")%></TD>
          <TD> <%= rsCustomers("City")%> </TD>
        </TR> 
    </TABLE>

    <HR>
    <Input Type=Button Name=cmdDown  Value="&lt;  ">
    <Input Type=Button Name=cmdUp Value=" &gt;">
    <H5>Click Direction Arrows for Previous or Next Record
    <BR> <BR>

    <FORM Method = Post Action="MoveVbs.asp" Name=Form>
    <TABLE>
        <TR>
           <TD><Input Type="Button" Name=Move Value="Move Amount "></TD>
           <TD></TD>
           <TD><Input Type="Text" Size="4" Name="MoveAmount" Value=0></TD>
        <TR>
    </TABLE>
    Click Move Amount to use Move Method<br>
    Enter Number of Records to Move + or - </H5>    </FORM>
</BODY>

<Script Language = "VBScript">

Sub Move_OnClick
   ' Make sure move value entered is an integer
   If IsNumeric(Document.Form.MoveAmount.Value)Then
      Document.Form.MoveAmount.Value = CInt(Document.Form.MoveAmount.Value)
      Document.Form.Submit
   Else
      MsgBox "You Must Enter a Number", ,"ADO-ASP Example"
      Document.Form.MoveAmount.Value = 0
   End If
End Sub

Sub cmdDown_OnClick
   Document.Form.MoveAmount.Value = -1
   Document.Form.Submit
End Sub

Sub cmdUp_OnClick
   Document.Form.MoveAmount.Value = 1
   Document.Form.Submit
End Sub
</Script>

<%
    ' clean up
    If rsCustomers.State = adStateOpen then
        rsCustomers.Close
    End If
    If Cnxn.State = adStateOpen then
        Cnxn.Close
    End If
%>
</HTML>
<!-- EndMoveVBS -->
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