Asp.net VB กดที่ RadioButton แล้วให้ค่าออกมาเลย

    Sub RadioButton3_CheckedChanged(sender As Object, e As EventArgs)
        IF Me.RadioButton3.Checked = True Then
            Me.lblText2.Text = "Option 3 Checked"
        End IF
    End Sub

 <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
                    DataSourceID="SqlDataSource1" Width="773px" DataKeyNames="id_core">
                    <Columns>
                     <asp:TemplateField> 
<ItemTemplate>
<%# Databinder.Eval(Container,"DataItemIndex") + 1 %>
</ItemTemplate>
</asp:TemplateField>
      <asp:HyperLinkField  Target ="_blank"   DataNavigateUrlFields="link" 
                            DataTextField="core" HeaderText="ความพึงพอใจ" />
                            

                            
                            
                         <asp:TemplateField  HeaderText="1"> 
                                         <ItemTemplate > <asp:RadioButton ID="rdC1_2" runat="server" GroupName = "rdCore1" /> 
                                          </ItemTemplate> 
                       </asp:TemplateField>
                        <asp:TemplateField HeaderText="2" >
                        <ItemTemplate > <asp:RadioButton ID="rdC1_3" runat="server" GroupName = "rdCore1"/>
                        
                                          </ItemTemplate> 
                       </asp:TemplateField>