I have a webform with a radiobuttonlist and a panelcontrol. Here is the html coding for the radiobuttonlist.

html code
=========

<asp:panel id="pnladdemployee" runat="server">

 <tr>
     <td><asp:RadioButtonList id="rdoobjective" Runat="server" RepeatDirection="Vertical" CssClass="label">
       <asp:ListItem Value="Add" Selected="True">Add Employee</asp:ListItem>
       <asp:ListItem Value="Select">View Employee</asp:ListItem>
       <asp:ListItem Value="Update">Update Employee</asp:ListItem>
       <asp:ListItem Value="Delete">Delete Employee</asp:ListItem>
      </asp:RadioButtonList></td>
    </tr>

My requirement is whenever i choose the "Add Employee" radiobutton then the panelcontrol named pnladdemployee should be displayed.For other radiobutton selection the panel visibility should be false.

What is the code to achieve this and in which event it should be coded? I am using vb.net as code behind

 Please Help!

You will need to write an event handler method in the codebehind to test what value the radiobutton list is changed to.  I believer it will go something like this:

 <asp:panel id="pnladdemployee" runat="server" Visible="false">

</asp:Panel>

 <tr>
     <td>

       <asp:RadioButtonList id="rdoobjective" Runat="server" RepeatDirection="Vertical" CssClass="label" OnSelectedIndexChanged="rdobjective_SelectedIndexChanged">
       <asp:ListItem Value="Add" Selected="True">Add Employee</asp:ListItem>
       <asp:ListItem Value="Select">View Employee</asp:ListItem>
       <asp:ListItem Value="Update">Update Employee</asp:ListItem>
       <asp:ListItem Value="Delete">Delete Employee</asp:ListItem>
      </asp:RadioButtonList></td>
    </tr>

 First, you will need to add AutoPostBack="true" to this control. It will make it so the when someone chooses. You also need to wire up an event handler. Your aspx will look like this.

<asp:RadioButtonList id="rdoobjective" Runat="server" RepeatDirection="Vertical" AutoPostBack="true" OnSelectedIndexChanged="rdoobjective_SelectedIndexChanged" CssClass="label">
       <asp:ListItem Value="Add">Add Employee</asp:ListItem>
       <asp:ListItem Value="Select">View Employee</asp:ListItem>
       <asp:ListItem Value="Update">Update Employee</asp:ListItem>
       <asp:ListItem Value="Delete">Delete Employee</asp:ListItem>
</asp:RadioButtonList>

This will need to go in the code behind. (I use C# so I hope this works)

Sub Index_Changed(ByVal sender As Object, ByVal e As EventArgs)
        If rdoobjective.SelectedItem.Value = "Add" Then
            pnladdemployee.Visible = True
        Else
            pnladdemployee.Visible = False
        End If

    End Sub

Happy Coding!