Microsoft KB Archive/240019

= How To Dynamically Populate a Data Report in Visual Basic =

Article ID: 240019

Article Last Modified on 7/15/2004

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APPLIES TO


 * Microsoft Visual Basic 6.0 Professional Edition
 * Microsoft Visual Basic 6.0 Enterprise Edition
 * Microsoft Data Access Components 2.0
 * Microsoft Data Access Components 2.1
 * Microsoft Data Access Components 2.1 Service Pack 2
 * Microsoft Data Access Components 2.1 Service Pack 1
 * Microsoft Data Access Components 2.1 Service Pack 2
 * Microsoft Data Access Components 2.5
 * Microsoft Data Access Components 2.6
 * Microsoft Data Access Components 2.7

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This article was previously published under Q240019



SUMMARY
This article explains how to create a report without binding the report to any data at design time. This allows you to generate a report without knowing the column names within the Data Source.



MORE INFORMATION
When using the Data Report, textboxes must be bound to an ADO recordset. In some situations it is necessary to generate this data report at runtime without knowing the column names at design time. To do this you must first have a data report included in your project with the correct number of controls needed to display the data being retrieved. Then open an ADO recordset and loop through this recordset populating the controls that were placed on the data report. The following code demonstrates how to accomplish this.

Sample Code
 Start a new Visual Basic Standard EXE project. Form1 is added by default. From the Project menu, click References, and select the Microsoft ActiveX Data Objects. From the Project menu select "Add Data Report". If there is no option for a Data Report then you will need to choose Components from the Project and a dialog box is displayed. Click on the Designers tab and add a reference to the Data Report. In the Data Report properties change the Data Report name to DR. Place two report Labels and two report Textboxes in the Detail Section of the report. Place a command button on Form1 named command1.  Place the following code into Form1. Dim cn As New ADODB.Connection Dim rs As New ADODB.Recordset Dim cmd As New ADODB.Command

Private Sub Command1_Click Dim q As Integer Dim intCtrl As Integer Dim x As Integer Dim z As Integer x = 0 q = 0 z = 0

With DR  .Hide Set .DataSource = rs  .DataMember = "" With .Sections("Section1").Controls For intCtrl = 1 To .Count If TypeOf .Item(intCtrl) Is RptLabel Then .Item(intCtrl).Caption = rs.Fields(q).Name & " :" q = q + 1 End If           If TypeOf .Item(intCtrl) Is RptTextBox Then .Item(intCtrl).DataMember = "" .Item(intCtrl).DataField = rs(z).Name z = z + 1 End If   Next intCtrl End With .Refresh .Show End With End Sub

Private Sub Form_Load

Command1.Caption = "Show Report"

cn.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _ "Data Source=C:\Program Files\Microsoft Visual   Studio\VB98\Nwind.mdb;" With cmd .ActiveConnection = cn       .CommandType = adCmdText .CommandText = "Select FirstName, Lastname from Employees" .Execute End With With rs       .ActiveConnection = cn        .CursorLocation = adUseClient .Open cmd End With

End Sub </li> Change the Data Source Property in the connect string to the path to your Northwind MDB.</li> Save and Run the Project. You should see a Data Report created with the information returned from the Northwind database.</li></ol>

(c) Microsoft Corporation 1999, All Rights Reserved. Contributions by Terrell D. Andrews, Microsoft Corporation.

Additional query words: dataenvironment

Keywords: kbhowto kbbug kbreportwriter KB240019

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