Enter Key problem

r p

17y7k.NET

When a person completes filling a form in the site, if the user presses on Enter key in the keyboard,

it should go to submit button by default. Is there any way I can make it happen?

Thanks

9 Replies

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r p17y ago
Thanks Niradhip, I already had the machine key. Still I am getting the same error.

Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
Thanks
Niradhip Chakraborty17y ago
This error may occur when one hosts an ASP.NET webpage on a web-garden.

Simple solution (for ASP.NET 2.0 and up): Generate a new machinekey and add it to the web.config.

Try the following URL to generate machinekey:

http://www.aspnetresources.com/tools/keycreator.aspx
r p17y ago
I set the enableEventValidation="false" in my web.config file.
But, I am getting an error like this:-
Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
Niradhip Chakraborty17y ago
The default configuration
hinders changes made on the client to prevent XSS (Cross Site Scripting). If
you don't want this support you can change enableEventValidation="true"/> to or
set <%@ Page EnableEventValidation="true" %> to <%@ Page
EnableEventValidation="false" %> in the one page you want to allow changes
made to your dropdownlists. Be sure though to check EVERY value on the
server. Remember: ALL INPUT IS EVIL!!!

Now u can check the following code:

ASP.NET 2.0 makes this problems easier and introduce a concept of a "default button". New defaultbutton attribute can be used with
or control. What button will be "clicked" depends of where actually cursor is and what button is chosen as a default button for form or a panel.

Here is sample HTML code that contains one form and one panel control:
r p17y ago

When I use

I am getting an error like this:-
Invalid postback or callback argument. Event validation is enabled using in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
When I used runat="server", it did not work. So, I removed runat="server".
Should I use something else?
Thanks,
Niradhip Chakraborty17y ago
We can set Defaultbutton property either in Form or if we've placed a panel than in panel





or if we use panel than
ravi17y ago
set the tab index for the controls in the page
r p17y ago
Thanks for your help.
I created a Javascript function with the code which you have given me.
But, how should I call this?
Where should I call this?
I am using asp.net login control. Suppose the user hits on enter key immediately after entering the username,
it should go to the Submit button, Now, it is not going to the Submit button.
Any idea?
Thanks so much
Arshad17y ago
Hi, use this javascript function
function doClick(buttonName,e)
{
            var key;
            if(window.event)
            {
              key = window.event.keyCode;     //IE
            }
            else
              key = e.which;     //firefox
            if (key == 13)
            {
                var btn = document.getElementById(buttonName);
                if (btn != null)
                {
                    btn.click();
                    event.keyCode = 0
                }
            }
   }
Regards
Khan.

Enter Key problem

Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.