Read HTML Elements from Code Behind using asp.net C#

Question

How can I read a HTML Element like input type=checkbox from the code behind? Without adding runat="server". Is that possible?

Please explain what do you want to do. I think you want to read rendered html. Right? — user94893
– user94893, Commented Nov 13, 2009 at 3:04
i have a input type=checkbox in my page and i want to know if it's checked or not from code behind. i dont want to use asp.net checkbox or add a runat=server to it. is that possible? — Jepe d Hepe
– Jepe d Hepe, Commented Nov 13, 2009 at 3:08
Yes, they're rendered as html literals and you can access them by using the Controls object. — Eran Betzalel
– Eran Betzalel, Commented Nov 13, 2009 at 3:09

Youssof · Accepted Answer · 2019-07-29 08:32:07Z

6

How can i read a HTML Element like input type=checkbox from the code behind?

Before asking this you should first understand that HTML Elements have nothing to do with the code-behind (on the server).
You cannot access them in any way as you cannot access the client's browser from the server.

If you want to access THE VALUE of the INPUT element that is posted to the server then you should use:

var postedValue = Request.Form["nameOfElement"];

So if you have HTML:

<input type="check" name="nameOfElement" value="Yes" />

then:

If user checked the element, then you will get "Yes" in the postedValue.
Otherwise postedValue will be null.

edited Jul 29, 2019 at 8:32

Youssof

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answered Nov 13, 2009 at 3:45

Dmytrii Nagirniak

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Comments

Kimtho6 · Accepted Answer · 2012-05-21 12:27:49Z

3

Look in the Request.Form collection to retrive those values

something along the lines of checking for this condition:

Request.Form("Name") != null

to check if the checkbox of name "Name" is checked. If the box isn't checked that value will be null

edited May 21, 2012 at 12:27

Kimtho6

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answered Nov 13, 2009 at 3:06

gn22

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1 Comment

Dmytrii Nagirniak Over a year ago

It is not an ID of element, but its NAME.

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