I am trying to color text boxes in a form 1

Gzk2010 · Jul 7, 2011

I am trying to color text boxes in a form and I get below error when run web page...

"A page can have only one server-side Form tag.

Exception Details: System.Web.HttpException: A page can have only one server-side Form tag."

my code behind:
foreach (Control c in frmBillingandShipping.Controls)

{
if (c.GetType() == typeof(TextBox))
{
TextBox t = (TextBox)c;
t.BackColor = System.Drawing.Color.AliceBlue;
t.ReadOnly = false;
}
}

my aspx page (top portion):

<%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="BillingandShipping.aspx.cs" Inherits="Gzk2012.ShoppingCart.BillingandShipping" %>
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<%--<form id="frmBillingandShipping" method="post" runat="server">--%>
...
</form>
</asp:Content>

I understand the master page has a form tag, how to get around this?
Thanks

jbenson001 · Jul 7, 2011

You can't at least not with the webforms model.. might be possible with MVC but not sure. Jason who posts here often can answer that for you.

Gzk2010 · Jul 7, 2011

Thanks JBenson001.

Clearly the line I post above was not commented out at time the exception was thrown. <%--<form id="frmBillingandShipping" method="post" runat="server">--%>

jmeckley · Jul 8, 2011

webforms can have 1 webforms form element and multiple html form elements. However form elements cannot be nested so you can't do this

Code:

<form id="form1" runat="server">
   <form id="sub-form1">
   </form>
   <form id="sub-form2">
   </form>
</form>

At least that's my understanding. Mark (cas8m) told me about that nuance. When I worked with webforms i only ever used the single webcontrol form element.

html does allow for multiple non-nested forms

Code:

<body>
   <form id="form1" action="/dothis" method="post">
   </form>
   <form id="form2" action="/dothat" method="post">
   </form>
   ...
   <form id="formN" action="/fpp" method="post">
   </form>
</body>

using an view engine that works with pure html rather than webforms servercontrol html tags allows for this kind of setup without any friction.

I'll stop short there, but if you're interested I would start researching the concepts of MVC (model view controller)

Jason Meckley
Programmer

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I am trying to color text boxes in a form 1

Gzk2010

Programmer

jbenson001

Programmer

Gzk2010

Programmer

jmeckley

Programmer

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