2 asp panel controls in an update panel - asp.net

Question

I kept 2 asp panel controls (with text boxes and buttons) in an update panel so that i want only 1 to be displayed at a time. And when i click on the button, the next asp panel should be visible with old asp panel hidden. I am not able to figure it out.. Here is the code...
<asp:UpdatePanel ID="updatepnlSSN" ChildrenAsTriggers="false" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Panel ID="pnlSSNLookup" runat="server" BackColor="#EEE6DF" BorderColor="#274F73"
BorderStyle="Outset">
<table>
<tr>
<td colspan="3">
<asp:Label ID="lblMsg" runat="server" ForeColor="#713C2C"></asp:Label>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblStudentID" runat="server" Text="State Student ID:" ForeColor="#274F73" ToolTip="State Student ID Label"></asp:Label>
</td
<td>
<asp:TextBox ID="txtStudentID" runat="server" ToolTip="Enter the student's state ID number" AccessKey="i" TabIndex="1"></asp:TextBox>
</td>
<td>
<asp:RegularExpressionValidator ID="valStudentID" runat="server" ControlToValidate="txtStudentID" ErrorMessage="Please enter numeric only" ValidationExpression="[0-9]+" ForeColor="#713C2C" Display="Dynamic">
</asp:RegularExpressionValidator>
<asp:RequiredFieldValidator ID="valStdntID" runat="server" ControlToValidate="txtStudentID" Display="Dynamic" ErrorMessage="Please enter a State Student ID" ForeColor="#713C2C"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblFName" runat="server" Text="Student Legal First Name:" ForeColor="#274F73" ToolTip="First Name Label"></asp:Label>
<td>
<td>
<asp:TextBox ID="txtFName" runat="server" AccessKey="f" TabIndex="2" ToolTip="Enter the Student's First Name"></asp:TextBox>
</td>
<td>
<asp:RequiredFieldValidator ID="valFirstName" runat="server" ControlToValidate="txtFName" Display="Dynamic" ErrorMessage="Please enter the student's first name." ForeColor="#713C2C"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblDOB" runat="server" ForeColor="#274F73" Text="Student Date of Birth </br> (mm/dd/yyyy)" ToolTip="STudent's date of birth label"></asp:Label>
</td>
<td>
<div style="position: relative;">
<asp:TextBox ID="txtDOB" runat="server" AccessKey="d" TabIndex="3" ToolTip="Enter the student's date of birth"></asp:TextBox>
<cc1:CalendarExtender ID="txtDOB_CalendarExtender" runat="server" Enabled="True" TargetControlID="txtDOB" PopupPosition="Right" Format="MM/dd/yyyy">
</cc1:CalendarExtender>
</div>
</td>
<td>
<asp:RangeValidator ID="RangeValidator1" runat="server" ControlToValidate="txtDOB" ErrorMessage="Please enter a valid date: mm/dd/yyyy" ForeColor="#713C2C" MaximumValue="01/01/2075" MinimumValue="01/01/1970" Type="Date" Display="Dynamic"></asp:RangeValidator>
<asp:RequiredFieldValidator ID="valStudentDOB" runat="server" ControlToValidate="txtDOB" Display="Dynamic" ErrorMessage="Please enter the student's date of birth" ForeColor="#713C2C"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>
</td>
</tr>
<tr>
<td>
<asp:Button ID="btnSearchSSN" runat="server" Text="Search" AccessKey="s" TabIndex="4" ToolTip="Begin student search" />
</td>
</tr>
</table>
</asp:Panel>
</td> </tr>
<tr>
<td>
</td>
</tr>
<tr>
<td style="padding: 0 10px 0 10px">
<asp:Panel ID="pnlSSNEntry" runat="server" BackColor="#EEE6DF" BorderColor="#274F73" BorderStyle="Outset" Visible="False" Height="110px">
<table align="left">
<tr>
<td colspan="3">
<asp:Label ID="lblSSnText" runat="server" ForeColor="#274F73" Text="Please enter the SSN for: "></asp:Label>
<asp:Label ID="lblSSNName" runat="server" ForeColor="#274F73"></asp:Label>
</td>
</tr>
<tr>
<td colspan="3">
<asp:Label ID="lblSSNSubmitMsg" runat="server" ForeColor="#713C2C"></asp:Label>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblSSN0" runat="server" ForeColor="#274F73" Text="Social Security Number: "></asp:Label>
</td>
<td>
<asp:TextBox ID="txtArea" runat="server" AccessKey="a" MaxLength="3" TabIndex="5" ToolTip="Enter the student's SSN area number" Width="29px"></asp:TextBox>
<asp:TextBox ID="txtGroup" runat="server" AccessKey="g" MaxLength="2" TabIndex="6" ToolTip="Enter the student's SSN group number" Width="22px"></asp:TextBox>
<asp:TextBox ID="txtSerial" runat="server" AccessKey="r" MaxLength="4" TabIndex="7" ToolTip="Enter the student's SSN serial number" Width="35px"></asp:TextBox>
</td>
<td>
<asp:Label ID="lblSSNError" runat="server" ForeColor="#713C2C" Text="Please enter a valid Social Security Number" Visible="False"></asp:Label>
</td>
</tr>
<tr>
<td>
</td>
</tr>
<tr>
<td>
<asp:Button ID="btnSSN" runat="server" Text="Submit SSN" AccessKey="n" TabIndex="8" ToolTip="Submit the student's SSN" />
</td>
</tr>
</table>
</asp:Panel>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnSearchSSN" EventName="Click" />
<asp:AsyncPostBackTrigger ControlID="btnSSN" EventName="Click" />
</Triggers>
</asp:UpdatePanel>

Answer 1

Would you not be better using an ASP:MultiView. Then you show one view at a time and it come with mutually exclusive bindings associated with it.
<asp:MultiView>
<asp:View>
View 1
</asp:View>
<asp:View>
View 2
</asp:View>
</asp:MultiView>

Answer 2

You would be better off using MultiView inside UpdatePanel and setting ActiveView based on button click. Here's a tutorial
In short MultiView is a wrapper around panels. It contains collection of View objects that can be activated. Only one View can be visible at any given time.

Answer 3

Answers above suggested an excellent approach to solve above issue, but if you really want to do that than try adding code on button click events like
protected void btnSearchSSN_Click(object sender, EventArgs e)
{
pnlSSNLookup.Visible = false;
this.pnlSSNEntry.Visible = true;
}
protected void btnSSN_Click(object sender, EventArgs e)
{
pnlSSNEntry.Visible = false;
this.pnlSSNLookup.Visible = true;
}
Hopefully it will give you required result you looking for.