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 -->