AJAX Update Panel and ASP Panel

[Marknut]

I have an AJAX UpdatePanel that contains multiple dropdownlists, a button, and an ASP Panel (which contains dropdownlists and textboxes). On button_click I want to enable the ASP panel, but it is not enabling. The ddls all work fine, I just can't enable/disable any controls within the update panel or the asp panel itself.

• I tried UpdateMode = Always
• I tried UpdateMode = Conditional where ddls and button were triggers
• I tried adding UpdatePanel.Upd ate() to the button_click
• I tried using visible instead of enabled (ASP Panel)

Nothing is working. Side Note: this is all within a step on the ASP Wizard (maybe that's the issue?).

[Frinavale]

Well I tried it and it worked fine for me.

I used a Wizard Control, placed an UpdatePanel within it...and within the UpdatePanel I have a Panel and 2 buttons (enable and disable). Within the Panel I have a DropDownList and a CheckBox.

In the enable button click event I enable the panel...in the disable button click event I disable the panel.

Everything works fine within the UpdatePanel within the Wizard.

This is what I have in my ASP page markup:

<asp:Wizard ID="theWiz" runat="server">
    <WizardSteps>
        <asp:WizardStep ID="step1" runat="server">
            <asp:UpdatePanel ID="Update1" runat="server">
                <ContentTemplate>
                    <asp:Panel ID="aPanel" runat="server" Enabled="false">
                        <asp:DropDownList ID="aDDL" runat="server">
                            <asp:ListItem Text="1" Value="1"></asp:ListItem>
                            <asp:ListItem Text="2" Value="2"></asp:ListItem>
                            <asp:ListItem Text="3" Value="3"></asp:ListItem>
                        </asp:DropDownList>
                        <asp:CheckBox ID="someCheckbox" runat="server" Text="Check Box..." />
                    </asp:Panel>
                    <asp:Button ID="enableButton" runat="server" Text="Enable" />
                    <asp:Button ID="disableButton" runat="server" Text="Disable" />
                </ContentTemplate>
            </asp:UpdatePanel>
        </asp:WizardStep>
    </WizardSteps>
</asp:Wizard>

This is what I have in my server-side code (VB.NET):

Public Partial Class Test
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    End Sub
   
    Private Sub enableButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles enableButton.Click
        aPanel.Enabled = True
    End Sub

    Private Sub disableButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles disableButton.Click
        aPanel.Enabled = False
    End Sub
End Class

I recommend that you step through your code and discover where you are setting the Panel.Enabled to false after you set it to true.

-Frinny

[Marknut]

Thanks for the quick response! What's wierd is when I place a message box on eiher side of the panel.enabled=t rue, I get the correct values. "False" before the enabled statement and "True" after. Then,when I click the button again, the exact same thing. "False" then "True." And I have no other code that ever disables the panel. Any ida what might cause that?

[Marknut]

Also, your code works great for me, I'm not sure what's happeneing with mine. There's a lot of wizard code or else I would paste it.

[Marknut]

The answer is that I'm getting an error with my cascading dropdownlists. The error shows at the bottom of the page, doing virtually nothing and appearing insignificant. Thanks to your example I noticed that I could not get yours to work after that error either so I need to investigate taht issue. Thanks for your help!

[Frinavale]

What is the error?

[Marknut]

The error was "DropDownList_C lient selection is not valid because it is not in the list." It was my mistake, here's the code (which later assigns these variables to the corresponding dropdownlists):

If DropDownList_Site.SelectedValue <> "" Then 
  Site = DropDownList_Site.SelectedValue
If DropDownList_Client_Parent.SelectedValue <> "" Then 
  Client_Parent = DropDownList_Client_Parent.SelectedValue
End If
If DropDownList_Client.SelectedValue <> "" Then 
  Client = DropDownList_[B][I]Site[/I][/B].SelectedValue
End If
If DropDownList_Program.SelectedValue <> "" Then 
  Program = DropDownList_Program.SelectedValue
End If
If DropDownList_Project.SelectedValue <> "" Then 
  Project = DropDownList_Project.SelectedValue
End If

The issue was the third line down. I would assign the Client variable the Site selection code. Then in DropDownList_Cl ient_databound, I would assign the Client variable to DropDownList_Cl ient.SelectedVa lue. The Problem was that I assigned the DropDownList_Si te.SelectedValu e to the Client variable. Here's the fixed code:

If DropDownList_Client.SelectedValue <> "" Then 
  Client = DropDownList_[I][B]Client[/B][/I].SelectedValue
End If

[Frinavale]

:) I'm glad you fixed the problem :)

-Frinny