<asp:DataGrid id="DemoGrid" runat="server" DataKeyField="CustomerID">
	<Columns>
	<asp:TemplateColumn HeaderText="Customer">
	<ItemTemplate>
	<asp:CheckBox ID="myCheckbox" Runat="server" />
	</ItemTemplate>
	</asp:TemplateColumn>
	</Columns>
</asp:DataGrid>
					

Imports System.Data.SqlClient
Imports System.Text
					

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        If Not IsPostBack Then

            'Create a SqlConnection object.
            'Modify the connection string as necessary for your environment.
            Dim cn As SqlConnection = New SqlConnection("Server=localhost;database=Northwind;UID=sa;PWD=")

            Dim cmd As SqlCommand = New SqlCommand("SELECT * FROM Customers", cn)
            cn.Open()
            Dim reader As SqlDataReader = cmd.ExecuteReader()
            DemoGrid.DataSource = reader
            DataBind()
            reader.Close()
            cn.Close()
        End If
End Sub
					

Private Sub GetSelections_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles GetSelections.Click
        Dim rowCount As Integer = 0
        Dim gridSelections As StringBuilder = New StringBuilder()

        'Loop through each DataGridItem, and determine which CheckBox controls
        'have been selected.
        Dim DemoGridItem As DataGridItem
        For Each DemoGridItem In DemoGrid.Items

            Dim myCheckbox As CheckBox = CType(DemoGridItem.Cells(0).Controls(1), CheckBox)
            If myCheckbox.Checked = True Then
                rowCount += 1
                gridSelections.AppendFormat("The checkbox for {0} was selected<br>", _
                                            DemoGrid.DataKeys(DemoGridItem.ItemIndex).ToString())
            End If
        Next
        gridSelections.Append("<hr>")
        gridSelections.AppendFormat("Total number selected is: {0}<br>", rowCount.ToString())
        ResultsInfo.Text = gridSelections.ToString()

End Sub