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Delete Method Example (VBScript)

This example uses the Delete method to remove a specified record from a Recordset.

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 into Notepad or another text editor, and save it as DeleteVBS.asp. You can view the result in any client browser.

To exercise the example, try using the AddNew example first to add some records. Then you can try to delete them. View the result in any client browser.

<!-- BeginDeleteVBS -->
<%@ Language=VBScript %>
<% ' use this meta tag instead of ADOVBS.inc%>
<!-- METADATA TYPE="typelib" uuid="00000205-0000-0010-8000-00AA006D2EA4"  -->
<HTML>
<HEAD>
<TITLE>ADO Delete Method</TITLE>
</HEAD>
<STYLE>
<!--
TH {
   background-color: #008080; 
   font-family: 'Arial Narrow','Arial',sans-serif; 
   font-size: xx-small;
   color: white;
   }
TD { 
   text-align: center;
   background-color: #f7efde;
   font-family: 'Arial Narrow','Arial',sans-serif; 
   font-size: xx-small;
    }
-->
</STYLE>

<BODY> 
<H3>ADO Delete Method</H3>

<%
    ' to integrate this code replace the DataSource value in the connection string

    ' connection and recordset variables
   Dim Cnxn, strCnxn
   Dim rsCustomers, strSQLCustomers

    ' create and 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
   Set rsCustomers = Server.CreateObject("ADODB.Recordset")
   strSQLCustomers = "Customers"
   rsCustomers.Open strSQLCustomers, Cnxn, adOpenKeyset, adLockOptimistic, adCmdTable
   
   ' Move to designated record and delete it
   If Not IsEmpty(Request.Form("WhichRecord")) Then
      'Get value to move from Form Post method
      Moves = Request.Form("WhichRecord")

      rsCustomers.Move CInt(Moves)
      If Not rsCustomers.EOF or rsCustomers.BOF Then
          ' handle any db errors
         On Error Resume Next
         rsCustomers.Delete 1
         If Cnxn.Errors.Count <> 0 Then
            Response.Write "Cannot delete since there are related records in other tables."
            Response.End
         End If
         rsCustomers.MoveFirst
         On Error GoTo 0
      Else
         Response.Write "Not a Valid Record Number"
         rsCustomers.MoveFirst
      End If
   End If
%>

<!-- BEGIN column header row for Customer Table-->
<TABLE COLSPAN=8 CELLPADDING=5 BORDER=0>
<TR>
   <TH>Rec. #</TH>
   <TH>Company Name</TH>
   <TH>Contact Name</TH>
   <TH>City</TH>
</TR>

   <% 
   ' Display ADO Data from Customer Table 
   ' Loop through Recordset adding one row to HTML Table each pass
   Dim iCount
   iCount = 0
   Do Until rsCustomers.EOF %>
   <TR>
     <TD> <%= CStr(iCount) %>
     <TD> <%= rsCustomers("CompanyName")%> </TD>
     <TD> <%= rsCustomers("ContactName")%> </TD>
     <TD> <%= rsCustomers("City")%> </TD>
   </TR>
   <% 
     iCount = iCount + 1
     rsCustomers.MoveNext 
   Loop 
   %>
</TABLE>

<!-- Do Client side Input Data Validation Move to named record and Delete it -->
<Center>
<H4>Clicking Button Will Remove Designated Record</H4>
<H5>There are <%=rsCustomers.RecordCount%> Records in this Set</H5>

<Form Method=Post Action="Deletevbs.asp" Name=Form>
   <Input Type=Text Name="WhichRecord" Size=3> 
   <Input Type=Button Name=cmdDelete Value="Delete Record">
</Form>

</BODY>

<Script Language = "VBScript">
Sub cmdDelete_OnClick
   If IsNumeric(Document.Form.WhichRecord.Value) Then
      Document.Form.WhichRecord.Value = CInt(Document.Form.WhichRecord.Value)
      Dim Response
      Response = MsgBox("Are You Sure About Deleting This Record?", vbYesNo,  "ADO-ASP Example")

      If Response = vbYes Then
         Document.Form.Submit
      End If
   Else
      MsgBox "You Must Enter a Valid Record Number",,"ADO-ASP Example"
   End If
End Sub
</Script>

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