Cannot Pass values from plain HTML to ASP.NET page

Question

I'm using an html file like below (tv.html):

<form action="myaspx.aspx?appid=5018" method="post" id="formSubscription" name="formSubscription">
<input type="checkbox" id="chckIsConfirm" name="chckIsConfirm"/> I Confirm
            <input type="submit" value="Ok" />
</form>

And trying to get it from "myaspx.aspx". And the code behind is:

protected void Page_Load(object sender, EventArgs e)
{
            if (!IsPostBack)
            {
               var r = HttpContext.Current.Request["chckIsConfirm"];
                 //Or
                NameValueCollection nvc = Request.Form;
               //Or
              var a = Request.Form.AllKeys;
            }
}

But I cannot pass the value of "chckIsConfirm". All keys comes empty.. What am I doing wrong?

UPDATE: Only when I check the checkbox it comes as "ON" other times just NULL.

Thanks in advance

Marek Karbarz · Accepted Answer · 2012-03-08 07:40:03Z

3

That's the default behavior for checkboxes in most browsers. If it's not checked the browser will not send it with the request. As a workaround add a hidden field that has the same name as the checkbox and value "0", "OFF", "FALSE" or whatever you want the "unchecked" value to be.

answered Mar 8, 2012 at 7:40

Marek Karbarz

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Comments

Arion · Accepted Answer · 2012-03-08 07:43:13Z

0

You are missing runat="server"

aspx

<input type="checkbox" id="chckIsConfirm" runat="server" name="chckIsConfirm"/>

cs

var checked= chckIsConfirm.Checked;

answered Mar 8, 2012 at 7:43

Arion

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7 Comments

Marek Karbarz Over a year ago

runt="server" is not necessary to simply post to an ASPX page from a non-aspx page.

Arion Over a year ago

No I know that. But it is much easier to get the value if you have.

Marek Karbarz Over a year ago

I guess "easier" would depend on the actual usage scenario (same/different servers etc.)

Arion Over a year ago

Yeah that depends on the scenario right. But using a hidden filed for a work around instead of having runat="server". Is that a god solution?

Marek Karbarz Over a year ago

Of course it is in this situation (and is fairly common). If I have an .html page (which he indicated he did) just adding runat="server" won't really do anything. You would first have to convert the entire page to regular ASP.NET webform and then adding runat="server" would have an effect.

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mslliviu · Accepted Answer · 2012-03-08 07:55:20Z

0

From your posted code, you are checking them only on first request, but when you click the button it is a postback so you are skiping the read of values

answered Mar 8, 2012 at 7:55

mslliviu

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