1. Create a new Visual Studio project.
2. From the Project menu, select Add New Item.
3. In the Add New Item dialog that appears, select ActiveReports 9 Section Report (code-based) and in the Name field, rename the file as rptModifyDS.
4. Click the Add button to open a new section report in the designer.

See Adding an ActiveReport to a Project for information on adding different report layouts.

Tip: Even if you will change the data source at run time, setting a design time data source allows you to drag fields onto the report from the Report Explorer.

1. On the detail section band, click the Data Source Icon.
   
2. In the Report Data Source dialog that appears, on the OLE DB tab, next to Connection String, click the Build button.
3. In the Data Link Properties window that appears, select Microsoft Jet 4.0 OLE DB Provider and click the Next button to move to the Connection tab.
4. Click the ellipsis (...) button to browse to your database, for example the NWind.mdb sample database. Click Open once you have selected the appropriate database path.
5. Click the Test Connection button to see if you have successfully connected to the database.
6. Click OK to close the Data Link Properties window and return to the Report Data Source dialog. Notice that the Connection String field gets filled automatically.
7. In the Query field on the OLE DB tab, enter the following SQL query.

   SQL Query	Copy Code
   SELECT * FROM Products

8. Click OK to save the data source and return to the report design surface.

1. On the design surface of the report, select the detail section and in the Properties window, set the CanShrink property to True.
2. In the Report Explorer, expand the Fields node, then the Bound node. Drag the following fields onto the detail section and in the Properties window, set the following properties.

TextBox1 (ProductID)

TextBox2 (ProductName)

TextBox3 (UnitsInStock)

TextBox4 (UnitsOnOrder)

TextBox5 (UnitPrice)

To change the data source at run time

1. Double-click in the gray area below rptModifyDS to create an event-handling method for the ReportStart event.
2. Add code to the handler to change the data source at run time.

To write the code in Visual Basic.NET

Dim conn As System.Data.OleDb.OleDbConnection
Dim reader As System.Data.OleDb.OleDbDataReader

Dim connString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + "C:\Users\[YourUserName]\Documents\ComponentOne Samples\ActiveReports 9\Data\NWIND.mdb"
conn = New System.Data.OleDb.OleDbConnection(connString)
Dim cmd As New System.Data.OleDb.OleDbCommand("SELECT * FROM Products WHERE UnitPrice = 18", conn)
conn.Open()
reader = cmd.ExecuteReader()
Me.DataSource = reader

To write the code in C#

private static System.Data.OleDb.OleDbConnection conn;
private static System.Data.OleDb.OleDbDataReader reader;

string connString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + @"C:\Users\[YourUserName]\Documents\ComponentOne Samples\ActiveReports 9\Data\NWIND.mdb";
conn = new System.Data.OleDb.OleDbConnection(connString);
System.Data.OleDb.OleDbCommand cmd = new System.Data.OleDb.OleDbCommand("SELECT * FROM Products WHERE UnitPrice = 18", conn);
conn.Open();
reader = cmd.ExecuteReader();
this.DataSource = reader;

To write the code in Visual Basic

reader.Close()
conn.Close()

To write the code in C#

reader.Close();
conn.Close();

• Click the preview tab to view the report at design time.

OR

• Open the report in the Viewer. See Using the Viewer for further information.