Question

For a site I’m developing I have two html buttons, not ASP because I do not want them to postback. For the submit button I am calling a javascript function that implements PageMethods to call a C# method from the codebehind. Here is the code for the buttons and the javascript.

<fieldset id="Fieldset">
    <button onclick="SendForm();">Send</button>             
    &nbsp;
    <button onclick="CancelForm();">Cancel</button>                  
</fieldset>

<asp:ScriptManager ID="ScriptManager1" EnablePageMethods="true" EnablePartialRendering="true" runat="server" />

<script type="text/javascript">
    function SendForm() {
        var email = $get("txtEmail").value;

        PageMethods.SendForm(email, OnSucceeded, OnFailed);
    }

    function OnSucceeded() {
        $get("Fieldset").innerHTML = "<p>Thank you!</p>";
    }

    function OnFailed(error) {
        alert(error.get_message());
    }
</script>

The codebehind method shown here:

[WebMethod]
public static void SendForm(string email)
{
    if (string.IsNullOrEmpty(email))
    {
        throw new Exception("You must supply an email address.");
    }
    else
    {
        if (IsValidEmailAddress(email))
        {
            bool[] desc = new bool[14];
            bool[] local = new bool[14];
            bool[] other = new bool[14];

            for (int i = 1; i <= 14; i++)
            {
                desc[i] = ((CheckBox)Page.FindControl("chkDesc" + i.ToString())).Checked;
                local[i] = ((CheckBox)Page.FindControl("chkLocal" + i.ToString())).Checked;
                other[i] = ((CheckBox)Page.FindControl("chkOther" + i.ToString())).Checked;

                /* Do stuff here */
            }
        }
        else
        {
            throw new Exception("You must supply a valid email address.");
        }
    }
}

does not work unless it is declared as static. Declaring it as static blocks me from checking the checkboxes on the page because it generates a “An object reference is required for the non-static field, method, or property” error. So my problem can be fixed from either of two directions. A) Is there a way I can have this method work without declaring it as static? B) How do I check the checkboxes if the method is static.

Answer 1

It has to be static, no way around that; But you can access the Page like this

Page page = HttpContext.Current.Handler as Page;

and do FindControl on this page instance.

desc[i] = ((CheckBox)page.FindControl("chkDesc" + i.ToString())).Checked;