This article was previously published under Q147882
Some improvements have been made to the data control in Microsoft VisualBasic version 4.0 and higher for Windows. One of these improvements is thecapability to assign back the results of a Recordset object to the datacontrol itself. This was not possible in Microsoft Visual Basic version 3.0for Windows.
This article demonstrates how to assign a Table-type, Dynaset-type, orSnapshot-type Recordset object back to a data control's Recordset property.
The OpenRecordset method has three possible types of records that it canproduce. Below is a portion of the Visual Basic Online Help that describesthe Openrecordset method that mentions these three types:
dbOpenTable to open a table-type Recordset object. dbOpenDynaset to open a dynaset-type Recordset object. dbOpenSnapshot to open a snapshot-type Recordset object.
Also, the following was taken directly from Chapter 4 of the "Guide to DataAccess Objects" book contained in the "Professional Features" Visual Basicmanual:
When you open a database using the data control, a Recordset object is automatically created based on the control's RecordSource property. You can address this Recordset with the following syntax:
All of the Recordset properties and methods discussed in this chapter canbe used with the data control's Recordset. In addition, you can assign thedata control's Recordset object to any Recordset variable you create. Forexample:
Dim MyRecordset As Recordset Set MyRecordset = Data1.Recordset
Conversely, you can assign a Recordset object that you createprogrammatically or with a data control to another data control, using thefollowing syntax:
Set Data1.Recordset = MyRecordset
When you assign a new Recordset object to the data control's Recordsetproperty, you must use the data control's Refresh method to rebuild theRecordset and allow the data control to properly display it. In addition,you must make sure that the DataField property of all bound controlsattached to the data control reflect valid fields in the new Recordset.
Start Visual Basic or on the File menu, click New Project (ALT, F, N) if Visual Basic is already running. Form1 is created by default.
Add three command buttons (Command1, Command2, and Command3), add two text boxes (Text1, and Text2) and one data control to Form1.
Set the following properties:
Default Property Value of Property ------------------------------------------------- Command1 Caption Assign Table-type Command2 Caption Assign Dynaset-type Command3 Caption Assign Snapshot-type Data1 DatabaseName BIBLIO.MDB Data1 RecordSource Titles Text1 DataSource Data1 Text1 Datafield Title Text2 DataSource Data1 Text2 Datafield Year Published
Add the following code to the Command1_Click event:
Private Sub Command1_Click() Dim ws As Workspace Dim db As Database Dim tbl As Recordset Set ws = DBEngine.Workspaces(0) Set db = ws.OpenDatabase("Biblio.mdb") Set tbl = db.OpenRecordset("titles", dbOpenTable) Set Data1.Recordset = tbl End Sub
Add the following code to the Command2_Click event:
Private Sub Command2_Click() Dim ws As Workspace Dim db As Database Dim rs As Recordset Set ws = DBEngine.Workspaces(0) Set db = ws.OpenDatabase("Biblio.mdb") Dim StrSQL As String StrSQL = "Select * from titles where title like 'a*' " Set rs = db.OpenRecordset(StrSQL, dbOpenDynaset) Set Data1.Recordset = rs End Sub
Add the following code to the Command3_Click event:
Private Sub Command3_Click() Dim ws As Workspace Dim db As Database Dim sn As Recordset Set ws = DBEngine.Workspaces(0) Set db = ws.OpenDatabase("Biblio.mdb") Dim StrSQL As String StrSQL = "Select * from titles where title like 'the*' " Set sn = db.OpenRecordset(StrSQL, dbOpenSnapshot) Set Data1.Recordset = sn End Sub
On the Run menu, click Start (ALT, R, S), or press the F5 key to run the program. Click the Command1 button to view the records as a table-type Recordset, click the Command2 button to view the records as a Dynaset-type Recordset, or click the Command3 button to view the records as a Snapshot-type Recordset.