HELP: [RETURN] key is not submitting form (ASP.NET 2.0)

[Axel Dahmen]

Hi,

trying to submit an ASPX form using the [RETURN] key (using IE6) the page is not submitted in my web project.

Trying to debug the pages' JavaScript code I noticed that there's some ASP.NET client script code being executed having a flaw:

function anonymous() {
if (!ValidatedText BoxOnKeyPress(e vent)) { event.cancelBub ble = true; if (event.stopProp agation) event.stopPropa gation(); return false; }
}

In this code, not all paths return a value! So my guess is that a random value is used by IE to consider whether to submit the form.

If this is true then I guess there's a bug in ASP.NET blocking me from implementing my customer's requirements.

Any ideas?

TIA,
Axel Dahmen

[bruce barker]

there is nothing wrong with the code. it returns void if no validtion is
required or validation is ok, or false if validation fails (and also as
a hack for an ie 6 bug in event canceling), which is what the browser wants.

if you look asp.net has default button support (which button to fire on
enter). see panel control.

-- bruce (sqlwork.com)

Axel Dahmen wrote:

Hi,

trying to submit an ASPX form using the [RETURN] key (using IE6) the page is not submitted in my web project.

Trying to debug the pages' JavaScript code I noticed that there's some ASP.NET client script code being executed having a flaw:

function anonymous() {
if (!ValidatedText BoxOnKeyPress(e vent)) { event.cancelBub ble = true; if (event.stopProp agation) event.stopPropa gation(); return false; }
}

In this code, not all paths return a value! So my guess is that a random value is used by IE to consider whether to submit the form.

If this is true then I guess there's a bug in ASP.NET blocking me from implementing my customer's requirements.

Any ideas?

TIA,
Axel Dahmen

[Axel Dahmen]

I see... Didn't know void was a legal return value.

It seems the script debugger doesn't step through dynamically generated code (new Function(){...} ). In that case I now know where to search now...

Thanks, Bruce!

Regards,
Axel

-----------
"bruce barker" <no****@nospam. comschrieb im Newsbeitrag news:OQ******** ******@TK2MSFTN GP04.phx.gbl...

there is nothing wrong with the code. it returns void if no validtion is
required or validation is ok, or false if validation fails (and also as
a hack for an ie 6 bug in event canceling), which is what the browser wants.

if you look asp.net has default button support (which button to fire on
enter). see panel control.

-- bruce (sqlwork.com)

Axel Dahmen wrote:

Hi,

trying to submit an ASPX form using the [RETURN] key (using IE6) the page is not submitted in my web project.

Trying to debug the pages' JavaScript code I noticed that there's some ASP.NET client script code being executed having a flaw:

function anonymous() {
if (!ValidatedText BoxOnKeyPress(e vent)) { event.cancelBub ble = true; if (event.stopProp agation) event.stopPropa gation(); return false; }
}

In this code, not all paths return a value! So my guess is that a random value is used by IE to consider whether to submit the form.

If this is true then I guess there's a bug in ASP.NET blocking me from implementing my customer's requirements.

Any ideas?

TIA,
Axel Dahmen

[Walter Wang [MSFT]]

Hi Alex,

Both the HtmlForm and the Panel have a property named DefaultButton could
let you assign a default button when ENTER key is pressed:

<form id="form1" defaultbutton=" Button1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" OnClick="Button 1_Click"
Text="Button" />
<asp:TextBox ID="TextBox3" runat="server"> </asp:TextBox>
<asp:Panel ID="Panel1" DefaultButton=" Button2" runat="server"
Height="50px" Width="125px">
<asp:Button ID="Button2" runat="server" OnClick="Button 1_Click"
Text="Button" />
<asp:TextBox ID="TextBox2"
runat="server"> </asp:TextBox></asp:Panel>

</div>
<asp:Panel ID="Panel2" DefaultButton=" Button3" runat="server"
Height="50px" Width="125px">
<asp:Button ID="Button3" runat="server" OnClick="Button 1_Click"
Text="Button" />
<asp:TextBox ID="TextBox1"
runat="server"> </asp:TextBox></asp:Panel>
</form>

protected void Button1_Click(o bject sender, EventArgs e)
{
Response.Write( (sender as Button).ID);
}

Regards,
Walter Wang (wa****@online. microsoft.com, remove 'online.')
Microsoft Online Community Support

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[Axel Dahmen]

Hi Walter,

great to hear from you! I guess the DefaultButton property doesn't work for LinkButtons, does it? Our website uses LinkButtons exclusively. We're applying the company's style guide to them.

I've created a function to scan Request.Form["__EVENTTAR GET"] for not being any of a page's link buttons on post back. This code raises a DefaultButtonPr essed event appropriately.

Yet, unfortunately the form doesn't post back at all when I press the [RETURN] key at the moment... I've created a second function to inject code into the document.forms[0].onsubmit event handler. Perhaps the code I'm injecting there doesn't work properly... I needed to write custom code since Page.ClientScri pt.RegisterOnSu bmitStatement injects code before validation but we want to get code executed *after* validation has been performed successfully. Perhaps you've got an idea?

Best regards,
www.dashop.de
Axel Dahmen
--------------
"Walter Wang [MSFT]" <wa****@online. microsoft.comsc hrieb im Newsbeitrag news:JY******** *****@TK2MSFTNG HUB02.phx.gbl.. .

Hi Alex,

Both the HtmlForm and the Panel have a property named DefaultButton could
let you assign a default button when ENTER key is pressed:

<form id="form1" defaultbutton=" Button1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" OnClick="Button 1_Click"
Text="Button" />
<asp:TextBox ID="TextBox3" runat="server"> </asp:TextBox>
<asp:Panel ID="Panel1" DefaultButton=" Button2" runat="server"
Height="50px" Width="125px">
<asp:Button ID="Button2" runat="server" OnClick="Button 1_Click"
Text="Button" />
<asp:TextBox ID="TextBox2"
runat="server"> </asp:TextBox></asp:Panel>

</div>
<asp:Panel ID="Panel2" DefaultButton=" Button3" runat="server"
Height="50px" Width="125px">
<asp:Button ID="Button3" runat="server" OnClick="Button 1_Click"
Text="Button" />
<asp:TextBox ID="TextBox1"
runat="server"> </asp:TextBox></asp:Panel>
</form>

protected void Button1_Click(o bject sender, EventArgs e)
{
Response.Write( (sender as Button).ID);
}

Regards,
Walter Wang (wa****@online. microsoft.com, remove 'online.')
Microsoft Online Community Support

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[Walter Wang [MSFT]]

Hi Axel,

Thanks for the update.

For the first part about LinkButton, based on my test, if the form has a
defaultButton set, focus on a LinkButton and press ENTER will still make
the defaultButton to submit the form. Also, if you set the defaultButton
attribute of the form to a LinkButton, it also works. I'm not sure if I
fully understood your question here, would you please elaborate more?

For the second part of the question, do you mean that you want to execute
some custom javascript code after the page's client-side validation passes?
I'm afraid it will not be easy to do so. Let's take a look at the
javascript generated by ASP.NET (view the webform in IE and save it as a
complete static html page to get the javascript files):

function WebForm_PostBac kOptions(eventT arget, eventArgument, validation,
validationGroup , actionUrl, trackFocus, clientSubmit) {
this.eventTarge t = eventTarget;
this.eventArgum ent = eventArgument;
this.validation = validation;
this.validation Group = validationGroup ;
this.actionUrl = actionUrl;
this.trackFocus = trackFocus;
this.clientSubm it = clientSubmit;
}
function WebForm_DoPostB ackWithOptions( options) {
var validationResul t = true;
if (options.valida tion) {
if (typeof(Page_Cl ientValidate) == 'function') {
validationResul t = Page_ClientVali date(options.va lidationGroup);
}
}
if (validationResu lt) {
if ((typeof(option s.actionUrl) != "undefined" ) &&
(options.action Url != null) && (options.action Url.length 0)) {
theForm.action = options.actionU rl;
}
if (options.trackF ocus) {
var lastFocus = theForm.element s["__LASTFOCU S"];
if ((typeof(lastFo cus) != "undefined" ) && (lastFocus != null)) {
if (typeof(documen t.activeElement ) == "undefined" ) {
lastFocus.value = options.eventTa rget;
}
else {
var active = document.active Element;
if ((typeof(active ) != "undefined" ) && (active !=
null)) {
if ((typeof(active .id) != "undefined" ) &&
(active.id != null) && (active.id.leng th 0)) {
lastFocus.value = active.id;
}
else if (typeof(active. name) != "undefined" ) {
lastFocus.value = active.name;
}
}
}
}
}
}
if (options.client Submit) {
__doPostBack(op tions.eventTarg et, options.eventAr gument);
}
}

<A
id=LinkButton1
href='javascrip t:WebForm_DoPos tBackWithOption s(new
WebForm_PostBac kOptions("LinkB utton1", "", true, "", "", false,
true))'>LinkBut ton</A>
As you can see, the validation and the postback steps are currently
executed in a single javascript function WebForm_DoPostB ackWithOptions. You
might want to replace the __doPostBack function to do your own stuff but I
haven't tested this. The default __doPostBack implementation is generated
in the webform as:

<SCRIPT type=text/javascript>
<!--
var theForm = document.forms['form1'];
if (!theForm) {
theForm = document.form1;
}
function __doPostBack(ev entTarget, eventArgument) {
if (!theForm.onsub mit || (theForm.onsubm it() != false)) {
theForm.__EVENT TARGET.value = eventTarget;
theForm.__EVENT ARGUMENT.value = eventArgument;
theForm.submit( );
}
}
// -->
</SCRIPT>
Regards,
Walter Wang (wa****@online. microsoft.com, remove 'online.')
Microsoft Online Community Support

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[Walter Wang [MSFT]]

Hi Axel,

Please ignore second part of my last reply since I've got some updated
information.

To execute some javascript before submitting the form and after the
client-side validation succeeds, you simply call some javascript in form's
onsubmit handler:

#Followers of the IHttpHandler : No more hijacking of __doPostBack in
Whidbey
http://weblogs.asp.net/vga/archive/2...fDoPostBackInW
hidbey.aspx

#onsubmit Event (FORM)
http://msdn2.microsoft.com/en-us/library/ms536972.aspx
Regards,
Walter Wang (wa****@online. microsoft.com, remove 'online.')
Microsoft Online Community Support

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[Axel Dahmen]

Hi Walter,

thank you for your reply. I'll try to use DefaultButton in our forms 'till
end of the week. Can't tell if it works for us right now although I'm rather
optimistic that it'll work.

The other solution, though, doesn't work for me as we're already using
Whidbey. The problem with the Page.RegisterOn SubmitStatement () member
function is that it inserts code *before* validators are executed. Yet, I
need to execute some code *after* validators have (successfully) executed
because I need to show a "please wait..." <divelement.
This is what Page.RegisterOn SubmitStatement () does (basically):

form.onsubmit()
{
-- RegisterOnSubmi tStatement inserts code here --
if (!PageIsValid() ) return false;
return true;
}
yet, what I need is:

form.onsubmit()
{
if (!PageIsValid() ) return false;
-- insert code here --
return true;
}
Currently I'm injecting this code manually using regular expressions and
creating a new Form object having my code inserted at the right place.
Unfortunately I can't debug into the so created function code.

Do you know any other way to have code inserted where I need it? Or would
this be something to suggest to the VS team?

TIA,
Axel Dahmen

PS.: Please remember I can't reply to your posts from my customer's office.
They have blocked the news: protocol back in Frankfurt.
----------------
"Walter Wang [MSFT]" <wa****@online. microsoft.comsc hrieb im Newsbeitrag
news:Uq******** ******@TK2MSFTN GHUB02.phx.gbl. ..

Hi Axel,

Please ignore second part of my last reply since I've got some updated
information.

To execute some javascript before submitting the form and after the
client-side validation succeeds, you simply call some javascript in form's
onsubmit handler:

#Followers of the IHttpHandler : No more hijacking of __doPostBack in
Whidbey

http://weblogs.asp.net/vga/archive/2...fDoPostBackInW

hidbey.aspx

#onsubmit Event (FORM)
http://msdn2.microsoft.com/en-us/library/ms536972.aspx
Regards,
Walter Wang (wa****@online. microsoft.com, remove 'online.')
Microsoft Online Community Support

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that others may learn and benefit from your issue.
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rights.

>

[Walter Wang [MSFT]]

Hi Axel,

To achieve your objective here (only execute some code after the page is
validated at client-side), don't use RegisterOnSubmi tStatement here (by the
way, Page.RegisterOn SubmitStatement is obsolete now in .NET 2.0, try to use
ClientScriptMan ager.RegisterOn SubmitStatement instead).
<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dt d">

<script runat="server">

protected void Page_Load(objec t sender, EventArgs e)
{
// ClientScript.Re gisterOnSubmitS tatement(this.G etType(), "submit",
"return confirm('Contin ue?')");
form1.Attribute s.Add("onsubmit ", "return confirm('Contin ue?')");
}

protected void Button1_Click(o bject sender, EventArgs e)
{
Response.Write( "Button1_Click" );
}
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Untitl ed Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server"> </asp:TextBox>
<asp:RequiredFi eldValidator ID="RequiredFie ldValidator1"
runat="server" ControlToValida te="TextBox1"

ErrorMessage="R equiredFieldVal idator"></asp:RequiredFie ldValidator>
<asp:Button ID="Button1" runat="server" Text="Button"
OnClick="Button 1_Click" /></div>
</form>
</body>
</html>
Using above test webform, the confirmation prompt will only display when
the client-side validation passed.

Let me know if this is what you want.

Regards,
Walter Wang (wa****@online. microsoft.com, remove 'online.')
Microsoft Online Community Support

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[=?Utf-8?B?QXhlbCBEYWhtZW4=?=]

Hi Walter,

thanks a lot for the response you've mailed to me. Your reply has put me on
the right path and it's helping me a lot indeed in finding the problem.

In your solution you wrote that there's an (apparently) invisible validator
keeping the page from submitting. I'll try to debug the .html pages to see
which validator that is. Perhaps some CSS is keeping the validator from
showing up.

Currently I don't see how I can possibly debug through the JavaScript that's
generated by the .axd files. Is there a way to debug through this code so I
can find the problem without first exporting the page into HTML using FireFox
(since IE doesn't do this)?

Walter, I really appreciate the effort you've already put into solving our
problem. Thanks a lot!

TIA,
Axel
--------------------------------
"Walter Wang [MSFT]" wrote:

Hi Axel,

To achieve your objective here (only execute some code after the page is
validated at client-side), don't use RegisterOnSubmi tStatement here (by the
way, Page.RegisterOn SubmitStatement is obsolete now in .NET 2.0, try to use
ClientScriptMan ager.RegisterOn SubmitStatement instead).
<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dt d">

<script runat="server">

protected void Page_Load(objec t sender, EventArgs e)
{
// ClientScript.Re gisterOnSubmitS tatement(this.G etType(), "submit",
"return confirm('Contin ue?')");
form1.Attribute s.Add("onsubmit ", "return confirm('Contin ue?')");
}

protected void Button1_Click(o bject sender, EventArgs e)
{
Response.Write( "Button1_Click" );
}
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Untitl ed Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server"> </asp:TextBox>
<asp:RequiredFi eldValidator ID="RequiredFie ldValidator1"
runat="server" ControlToValida te="TextBox1"

ErrorMessage="R equiredFieldVal idator"></asp:RequiredFie ldValidator>
<asp:Button ID="Button1" runat="server" Text="Button"
OnClick="Button 1_Click" /></div>
</form>
</body>
</html>
Using above test webform, the confirmation prompt will only display when
the client-side validation passed.

Let me know if this is what you want.

Regards,
Walter Wang (wa****@online. microsoft.com, remove 'online.')
Microsoft Online Community Support

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