How to insert dynamically generated HTML into the <body> of an ASP.NET page?

  • Thread starter Thread starter Rick Spiewak
  • Start date Start date
R

Rick Spiewak

I need to generate a "buy" button as part of an ASP.NET page - this consists
of a small HTML form with hidden fields, conforming to the requirements of a
merchant credit card processor. PayPal is similar.

I'm succeeding in doing this by using Writer.Write to emit my HTML, at least
as far as getting it to work.

However, depending on where I put MyBase.Render(Writer), I get my HTML
either before the header or after the end of the body of the HTML generated
by ASP.NET. Oddly enough, both Netscape and IE seem to be happy to handle
this. But, it looks ugly and is probably non-compliant.

Anyone have any ideas as to how to split the difference and get my added
HTML form into the <body>?

TIA

Rick Spiewak
 
Off the top of my head, I wonder if adding a Literal server control to hold the
content would serve your purpose? It is made to sit inside the existing
server-side <form>. Maybe I've missed something?

Ken

I need to generate a "buy" button as part of an ASP.NET page - this consists
of a small HTML form with hidden fields, conforming to the requirements of a
merchant credit card processor. PayPal is similar.

I'm succeeding in doing this by using Writer.Write to emit my HTML, at least
as far as getting it to work.

However, depending on where I put MyBase.Render(Writer), I get my HTML
either before the header or after the end of the body of the HTML generated
by ASP.NET. Oddly enough, both Netscape and IE seem to be happy to handle
this. But, it looks ugly and is probably non-compliant.

Anyone have any ideas as to how to split the difference and get my added
HTML form into the <body>?

TIA

Rick Spiewak
 
a literal control won't work because you cannot nest forms in html. the
easisest way is to write a function that renders the html and call from the
page:

<body>
<% RenderBuyForm(); %>
<form runat=server id=myform>
......
</form>
</body>
 
Thanks for your suggestion. But, anything which creates another <form>
tag at design time causes errors. I'm looking for an event (for example)
to tie into which lets me emit HTML inside of the <body> tag. Or, even
inside the <html> tags, since more than one <body> is (still?)
technically OK.
 
I am successfully using Bruce's suggestion. One subtlety - the routine gets
called extra times. I found I can avoid this by using:

' Prevent double-painting of screen - wait for Render event

If Not Rendering Then Exit Function

Rendering = False



where "Rendering" is a boolean flag set to true in the Render override:



Protected Overrides Sub Render(ByVal writer As System.Web.UI.HtmlTextWriter)

Rendering = True

MyBase.Render(writer)

End Sub
 
Hi Rick,

I am glad to hear that. Thank you for sharing the knowledge in the
newsgroup.

Best Regards,
Lewis

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--------------------
| Reply-To: "Rick Spiewak" <[email protected]>
| From: "Rick Spiewak" <[email protected]>
| References: <[email protected]>
<en#[email protected]>
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| Subject: Re: How to insert dynamically generated HTML into the <body> of
an ASP.NET page?
| Date: Fri, 1 Aug 2003 01:27:04 -0400
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| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet
|
| I am successfully using Bruce's suggestion. One subtlety - the routine
gets
| called extra times. I found I can avoid this by using:
|
| ' Prevent double-painting of screen - wait for Render event
|
| If Not Rendering Then Exit Function
|
| Rendering = False
|
|
|
| where "Rendering" is a boolean flag set to true in the Render override:
|
|
|
| Protected Overrides Sub Render(ByVal writer As
System.Web.UI.HtmlTextWriter)
|
| Rendering = True
|
| MyBase.Render(writer)
|
| End Sub
|
|
|
| | > What about using a protected variable in the code behind (protected
| > mstrMyVariable as string="") then fill it by whatever value you want at
| any
| > time. Then somewhere in your HTML code add <% =mstrMyVariable %>(you
may
| > need to add quotes) . I use this and it works fine.
| >
| >
| > | > > a literal control won't work because you cannot nest forms in html.
the
| > > easisest way is to write a function that renders the html and call
from
| > the
| > > page:
| > >
| > > <body>
| > > <% RenderBuyForm(); %>
| > > <form runat=server id=myform>
| > > .....
| > > </form>
| > > </body>
| > >
| > >
| > >
| > >
message
| > > | > > > Off the top of my head, I wonder if adding a Literal server control
to
| > > hold the
| > > > content would serve your purpose? It is made to sit inside the
| existing
| > > > server-side <form>. Maybe I've missed something?
| > > >
| > > > Ken
| > > >
| > > > | > > > I need to generate a "buy" button as part of an ASP.NET page - this
| > > consists
| > > > of a small HTML form with hidden fields, conforming to the
| requirements
| > of
| > > a
| > > > merchant credit card processor. PayPal is similar.
| > > >
| > > > I'm succeeding in doing this by using Writer.Write to emit my HTML,
at
| > > least
| > > > as far as getting it to work.
| > > >
| > > > However, depending on where I put MyBase.Render(Writer), I get my
HTML
| > > > either before the header or after the end of the body of the HTML
| > > generated
| > > > by ASP.NET. Oddly enough, both Netscape and IE seem to be happy to
| > handle
| > > > this. But, it looks ugly and is probably non-compliant.
| > > >
| > > > Anyone have any ideas as to how to split the difference and get my
| added
| > > > HTML form into the <body>?
| > > >
| > > > TIA
| > > >
| > > > Rick Spiewak
| > > >
| > > >
| > > >
| > >
| > >
| >
| >
|
|
|
 
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