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Exit Sub
DbError:
MsgBox “There was an error retrieving information “ & _
“from the database.” _
& Err.Number & “, “ & Err.Description
End Sub
Private Sub cmdMoveLast_Click()
On Error GoTo DbError
‘Move to the last record in the result set.
rsCategories.MoveLast
Me.txtCategoryId = rsCategories!CategoryID
Me.txtCategoryName = rsCategories!CategoryName
Me.txtDescription = rsCategories!Description
Exit Sub
DbError:
MsgBox “There was an error retrieving information “ & _
“from the database.” _
& Err.Number & “, “ & Err.Description
End Sub
Private Sub cmdMoveNext_Click()
On Error GoTo DbError
255
Chapter 9  •  Database Programming with ADO
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256
‘Move to the next record in the result set if the cursor is not
‘already at the last record.
If rsCategories.AbsolutePosition < _
rsCategories.RecordCount Then
rsCategories.MoveNext
Me.txtCategoryId = rsCategories!CategoryID
Me.txtCategoryName = rsCategories!CategoryName
Me.txtDescription = rsCategories!Description
End If
Exit Sub
DbError:
MsgBox “There was an error retrieving information “ & _
“from the database.” _
& Err.Number & “, “ & Err.Description
End Sub
Private Sub cmdMovePrevious_Click()
On Error GoTo DbError
‘Move to the previous record in the result set, if the
‘current record is not the first record.
If rsCategories.AbsolutePosition > 1 Then
rsCategories.MovePrevious
Me.txtCategoryId = rsCategories!CategoryID
Me.txtCategoryName = rsCategories!CategoryName
Me.txtDescription = rsCategories!Description
End If
Access VBA Programming for the Absolute Beginner, Second Edition
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Exit Sub
DbError:
MsgBox “There was an error retrieving information “ & _
“from the database.” _
& Err.Number & “, “ & Err.Description
End Sub
Updating Records
Updating records using ADO’s 
Recordset
object is relatively easy. Generally speaking, you
perform the following tasks:
1. Declare a new 
Recordset
object variable.
2. Define and create a SQL string that identifies the record you want to update.
3. Assign updatable cursor and lock types for updating a record.
4. Open the recordset, which should contain only one record, the record you wish to
update.
5. Assign new data to the recordset fields.
6. Update the recordset using the 
Recordset
object’s 
Update
method.
7. Close the recordset using the 
Recordset
object’s 
Close
method.
8. Refresh other recordsets, if applicable, by closing and reopening the recordset or call-
ing the 
Recordset
object’s 
Requery
method.
The tricky part in updating records is ensuring that your SQL queries are well defined. For
example, to update a record in the 
Categories
table of the 
Northwind
database, I want to qual-
ify my recordset using the table’s primary key. In this case that’s the 
CategoryID
field.
sql = “select * from Categories where CategoryID = “ & _
Val(Me.txtCategoryId.Value)
In the preceding SQL string, I assign the value of the text box containing the category 
ID. Since I’m using a 
String
variable, I can build a dynamic SQL statement using control
properties—input from the user. By using a condition in my SQL string and supplying it with
the primary key of a record, I’m making sure that only the record with the primary key is
contained in the result set.
257
Chapter 9  •  Database Programming with ADO
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258
When concatenating string or text values to a dynamic SQL statement, you
must use single quotes inside of double quotes to surround the expression.
sql = “select * from Categories where CategoryName = ‘“ & _
Val(Me.txtCategoryName.Value) & “‘“
You may be asking yourself, “How do I know what record to update?” The answer to this
question is based on the record selected in the graphical interface. So long as your GUI
allows a user to select only one record, you are in good shape. To demonstrate, I now add
VBA/ADO code to the 
Update
command button’s 
Click
event in the 
Remote Connection
program.
Private Sub cmdUpdate_Click()
Dim sql As String
Dim rsUpdate As New ADODB.Recordset
On Error GoTo DbError
‘Build dynamic SQL statement based on record
‘selected by the user.
sql = “select * from Categories where CategoryID = “ & _
Val(Me.txtCategoryId.Value)
‘Assign updatable cursor and lock type properties.
rsUpdate.CursorType = adOpenDynamic
rsUpdate.LockType = adLockOptimistic
‘Open the Recordset object.
rsUpdate.Open sql, remoteConnection, , , adCmdText
‘Don’t try to update the record, if the recordset
‘did not find a row.
If rsUpdate.EOF = False Then
‘Update the record based on input from the user.
With rsUpdate
!CategoryName = Me.txtCategoryName
!Description = Me.txtDescription
TRICK
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.Update
.Close
End With
End If
MsgBox “Record updated.”, vbInformation
‘Close the form-level Recordset object and
‘refresh it to include the newly updated row.
rsCategories.Close
SetRecordset
Exit Sub
DbError:
MsgBox “There was an error updating the database.” _
& Err.Number & “, “ & Err.Description
End Sub
The 
Recordset
object’s 
Update
method is synonymous with saving.
Adding Records
Adding records with ADO does not necessarily require the use of SQL queries. In most sce-
narios, you simply need a record added to a table based on user input. In the simplest form,
records are added to tables using the following steps:
1. Declare a new 
Recordset
object variable.
2. Assign updatable cursor and lock types for adding a record.
3. Open the 
Recordset
object using its 
Open
method with a table name as the first 
parameter and the associated 
adCmdTable
constant name for the options parameter.
4. Call the 
Recordset
object’s 
AddNew
method.
TRICK
259
Chapter 9  •  Database Programming with ADO
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260
5. Assign new data to the recordset fields.
6. Save the new row of data using the 
Recordset
object’s 
Update
method.
7. Close the recordset using the 
Recordset
object’s 
Close
method.
8. Refresh other recordsets, if applicable, by closing and reopening the recordset or 
calling the 
Recordset
object’s 
Requery
method.
Using the preceding steps, the following code implements the 
Click
event procedure of the
Add
command button from Figure 9.2.
Private Sub cmdAdd_Click()
Dim sql As String
Dim rsAdd As New ADODB.Recordset
On Error GoTo DbError
‘Assign updatable cursor and lock type properties.
rsAdd.CursorType = adOpenDynamic
rsAdd.LockType = adLockOptimistic
‘Open the Recordset object.
rsAdd.Open “Categories”, remoteConnection, , , adCmdTable
‘Add the record based on input from the user
‘(except for the AutoNumber primary key field).
With rsAdd
.AddNew
!CategoryName = Me.txtCategoryName
!Description = Me.txtDescription
.Update
.Close
End With
MsgBox “Record Added.”, vbInformation
‘Close the form-level Recordset object and refresh
‘it to include the newly updated row.
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rsCategories.Close
SetRecordset
Exit Sub
DbError:
MsgBox “There was an error adding the record.” _
& Err.Number & “, “ & Err.Description
End Sub
Deleting Records
Deleting records using ADO is somewhat similar to updating records in that you need to use
SQL queries to identify the record for updating—in this case, deleting. The numbered steps
identify a typical ADO algorithm for deleting a record:
1. Declare a new 
Recordset
object variable.
2. Assign updatable cursor and lock types for deleting a record.
3. Construct a dynamic SQL string that uses a condition to retrieve the record selected
by the user. The condition should use a field, which is a key (unique) value selected
by the user.
4. Open the recordset, which should contain only one record (the record you wish to
delete).
5. If the record was found, call the 
Recordset
object’s 
Delete
method.
6. Save the record operation using the 
Recordset
object’s 
Update
method.
7. Close the recordset using the 
Recordset
object’s 
Close
method.
8. Refresh other recordsets, if applicable, by closing and reopening the recordset or 
calling the 
Recordset
object’s 
Requery
method.
Using these steps, I can implement ADO program code in the 
Click
event procedure of the
Delete
command button shown in Figure 9.2.
Private Sub cmdDelete_Click()
Dim sql As String
Dim rsDelete As New ADODB.Recordset
261
Chapter 9  •  Database Programming with ADO
262
On Error GoTo DbError
‘Build dynamic SQL statement based on
‘record selected by the user.
sql = “select * from Categories where CategoryID = “ & _
Val(Me.txtCategoryId.Value)”
‘Assign updatable cursor and lock type properties.
rsDelete.CursorType = adOpenDynamic
rsDelete.LockType = adLockOptimistic
‘Open the Recordset object.
rsDelete.Open sql, remoteConnection, , , adCmdText
‘Don’t try to delete the record, if the
‘recordset did not find a row.
If rsDelete.EOF = False Then
‘Update the record based on input from the user.
With rsDelete
.Delete
.Update
.Close
End With
End If
MsgBox “Record deleted.”, vbInformation
‘Close the form-level Recordset object and refresh
‘it to include the newly updated row.
rsCategories.Close
SetRecordset
Exit Sub
DbError:
Access VBA Programming for the Absolute Beginner, Second Edition
MsgBox “There was an error deleting the record.” _
& Err.Number & “, “ & Err.Description
End Sub
Chapter Program: Choose My Adventure
Without a doubt, 
ChooseMyAdventure
is one of my favorites of the programs I’ve built for any
of my Absolute Beginner books. 
Choose My Adventure
uses ADO programming techniques to
access tables that contain a short story. The story presents questions on various pages and
allows the reader to select an outcome. Depending on the selected outcome, the reader gets
a different story and ending.
I used two forms to build 
Choose My Adventure
—one to show about details (see Figure 9.3) and
the other to house the program’s main functionality (see Figure 9.4). Controls and proper-
ties of the 
Choose My AdventureAbout
form is shown next.
263
Chapter 9  •  Database Programming with ADO
Figure 9.3
The Aboutform
of the Choose 
My Adventure
program.
264
There is minimal code required for the 
About
form, which uses the 
DoCmd
object’s 
Close
method to close the form.
Private Sub cmdOK_Click()
DoCmd.Close acForm, “About”
End Sub
The core functionality of the 
ChooseMyAdventure
program is contained in the 
Main
form with
controls and properties described in Table 9.7.
Access VBA Programming for the Absolute Beginner, Second Edition
Figure 9.4
Using chapter-
based concepts
to build the
Choose My
Adventure
program.
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