Server altering name of form fields

[CJM]

[A third attempt - my first two attempts doesn't appear to have shown
up -yet]

I have a bit of code that inserts some extra controls (specifically,
ordinary <input type="hidden" name="MyField"f orm fields) into an existing
HTML form. However, it is mangling the name & IDs of these controls when
they are rendered:

For example, the PPItemName field is rendered as: <input
name="ctl00$Mai nBodyContent$PP ItemName" type="hidden"
id="ctl00_MainB odyContent_PPIt emName" />

Ordinarily, I wouldn't care (and it wouldn't matter either), but this form
is posting to a Paypal server and paypal is expecting particular field
names - so consequently we are having problems.

I can understand that .NET needs to use the ID attribute, but why the name
attribute? The name attribute is important in standard HTML, but I wouldn't
have thought so for .NET.

A workaround would be to use a placeholder, and use .innerHTML to inject
straight HTML inside. But this entire piece of code is already a workaround
for .NETs inability to handle multiple forms, so I thought there must be a
limit to the amount of messing about that I have to do.

Is there a way that I can force the server not to change the name of the
fields?

Thanks in advance...

Chris

[Ben Amada]

On Sep 24, 7:35*am, "CJM" <cjmn...@remove me-yahoo.co.ukwrot e:

This works great, Ben. but why?

It appears that there's a difference if you set the
HtmlGenericCont rol's ID property directly, as opposed to giving it an
ID through the attributes collection.

HtmlGenericCont rol hgc = new HtmlGenericCont rol("input");
hgc.ID = "hgc";
hgc.Attributes. Add("name", "hgc");
hgc.Attributes. Add("type", "hidden");
hgc.Attributes. Add("value", "some value");
this.Form.Contr ols.Add(hgc);

This results in an altered server ID:

<input id="ctl00_hgc" name="hgc" type="hidden" value="some value"></
input>

If you try to omit setting the ID property with the HtmlInputHidden
and instead set it via the attributes collection,

HtmlInputHidden hih = new HtmlInputHidden ();
hih.Attributes. Add("id", "hih");
hih.Attributes. Add("name", "hih");
hih.Attributes. Add("type", "hidden");
hih.Attributes. Add("value", "some value");
this.Form.Contr ols.Add(hih);

Unsuccessfully, you get:

<input name="ctl00$ctl 02" type="hidden" id="hih" value="some value"/>

So, best combination is what you already have.

[CJM]

It's all very curious... but, what-the-hell... it's working & my code isn't
a complete mess so I'm happy.

Thanks again for your thorough efforts on my behalf.

Chris