C# CheckBox Question

Question

I have HTML Generated Checkboxes on a page. How can I check to see if they are 'Checked' with c#? I am looking to use an if statement

if (checkbox.checked = true)
   {
        // EXECUTE CODE HERE
   }

I don't know how to call the element since it's HTML.

For my HTML I use another aspx to generate the HTML

FileListLabel.Text += ("<input type='checkbox' name='option" + counter +
                       "' value='" + SPEncode.HtmlEncode(oListItem["ID"].ToString()) +
                       "'>" + SPEncode.HtmlEncode(oListItem["LinkFilename"].ToString()) + "<BR>");

Is there a way to make that runat server? Or Should I use the Request.Form?

Thank you.

can you show some of your HTML? Are you using ASP.Net? ASP.NET MVC? — hunter
– hunter, Commented Feb 3, 2011 at 13:59
Can't provide solid answer here, but I guess you should be able to get the html using the WebBrowser object, followed by using something similar to getElementById(myCheckboxId).attribute("checked"); Note that I havn't tested this, but see if it helps you. — Pieter888
– Pieter888, Commented Feb 3, 2011 at 14:03

Oded · Accepted Answer · 2011-02-03 13:58:38Z

2

An HTML checkbox will only be submitted if it is checked.

So, if it exists in the postback, it was checked.

answered Feb 3, 2011 at 13:58

Oded

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Joe · Accepted Answer · 2011-02-03 13:59:46Z

1

With C# you either need to have the checkboxes declared as runat="server" to access by name, or check the Request.Form for the value.

answered Feb 3, 2011 at 13:59

Joe

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apros · Accepted Answer · 2011-02-03 16:08:38Z

0

In my opinion you should do this with javascript only in a way like <input onclick="__doPostBack('__Page', 'yourCheckboxNumberNIsChecked');" /> // where yourCheckboxNumberNIsChecked is flag which you will set when you define that checkbox has property checked set in "true". Then in code-behind you can define this event in a such way:

If Page.IsPostBack Then
   Dim eventArg As String = Request("__EVENTARGUMENT")
   If eventArg = "yourCheckboxNumberNIsChecked" Then
       Response.Write("You check it !")
   End If
End If

answered Feb 3, 2011 at 16:08

apros

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