Question

The answer is probably obvious but I have not seen anything I could use except the opposite – manipulating the parent from the child – so I’m posting new.

I have a shopping cart system I’m working on that my company purchased and I’m new to .NET so I may not even ask this properly.

My store has a page in the checkout portion that looks basically like this:

PaymentPage.ascx:

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="PaymentPage.ascx.cs" Inherits="ConLib_PaymentPage" %>
<%@ Register Assembly="CommerceBuilder.Web" Namespace="CommerceBuilder.Web.UI.WebControls" TagPrefix="cb" %>
<%@ Register Src="~/Checkout/PaymentForms/CreditCardPaymentForm.ascx" TagName="CreditCardPaymentForm" TagPrefix="uc" %>
<ajax:UpdatePanel ID="PaymentAjax" runat="server">
    <ContentTemplate>

            On page controls, etc.
            Then a checkbox saying they've read the terms and agree:
    <div id="terms">
        <asp:CheckBox ID="AgreeTerms" runat="server" Text="I agree to the Terms Of Service" CssClass="Terms" AutoPostBack="True" OnCheckedChanged="AgreeTerms_Clicked"/>
    </div>

The task I want to accomplish is in the OnCheckedChanged event I want to enable or disable an imagebutton inside the CreditCardPaymentForm control.

That code looks like this:

<%@ Control Language="C#" ClassName="CreditCardPaymentForm" EnableViewState="false" %>
<%@ Register Assembly="CommerceBuilder.Web" Namespace="CommerceBuilder.Web.UI.WebControls" TagPrefix="cb" %>
<%@ Register assembly="wwhoverpanel" Namespace="Westwind.Web.Controls" TagPrefix="wwh" %>

... a <script> block with some code and then HTML

<span class="TTAActionButton">
    <br>
    <asp:ImageButton ID="CreditCardButton" runat="server" ToolTip="Pay With Card" SkinID="TTAPlaceOrder" OnClick="CreditCardButton_Click" />
    <asp:HiddenField runat="server"  ID="FormIsSubmitted" value="0" />
    <br /><br /><br />
</span>

I want to be able to turn the CreditCardButton on and off depending on whether the checkbox is checked. I would have a routine in the page codebehind like:

public void AgreeTerms_Clicked(object sender, EventArgs e)
{
    if (AgreeTerms.Checked)
        CreditCardButton.Enabled = false;
}

but every permutation of that I try has failed.

I have abbreviated the code but if I’ve left out too much please let me know.

Thanks for your help and if you assume I know nothing about .NET then double-thanks!
Jim

Answer 1

In the CreditCardPaymentForm control create a property that exposes the CreditCardButton visibility and than use that from the parent in the OnCheckedChanged function handler.

public bool ShowCreditCardButton
{
   get { return CreditCardButton.Visable; }
   set { CreditCardButton.Visable = value; }
}