I have a webform application that uses asp.net validators. I have a bootstrap accordian (or any accordian jquery etc) and I only want to validate controls that are on the visible panel. I setup a validation group for each panel. I have a single submit button.
I was using jquery to set the validationgroup property, but it seems when done this way, the button ignores the value.
I have tried validating manually but the page seems to skip validation altogether in that case. I am really banging my head against the wall.
<asp:button ID="btnDeleteConfirmation" runat="server" Text="Save" OnClientClick="return Validate();" CausesValidation="False"/>
function Validate() {
var isValid = false;
isValid = Page_ClientValidate(mode);
return isValid;
}
the mode is set when the tab/panel is switched, the value is correct when I check it. The function is called and the return value looks good, but the page postbacks and then i get the following expected error:
Page.IsValid cannot be called before validation has taken place. It should be queried in the event handler for a control that has CausesValidation=True and initiated the postback, or after a call to Page.Validate.
How do others handle validation client side when only one tab/panel needs to be validated and there is a single submit button?
Normally in this case I set the validation groups on each section properly, then on whatever button I need to do the validation I do
Page.Validate(groupName);
Then you can call Page.IsValid and it will only use the validated group. That way you don't have to do anything else. Don't associated a validation group for your button either.
I have a page with a repeater containing RadioButtonLists which have requiredFieldValidators attached to them. I need to keep the RFV next to the control (it's the only way I can get it to work to be honest!)
However, the form is made up of a few sections contained in an accordion. This means that when the form is submitted, the item that has failed validation may not be visible, so the user won't know where the error is.
Is there a way I can also have a message by the submit button which is triggered by an RFV changing saying "please go back and check your answers" or something? I guess I'd need to use JQuery / JavaScript as it would be clientside.
There is a special ValidationSummary control for that:
<asp:ValidationSummary ID="Summary" runat="server"
DisplayMode="SingleParagraph"
HeaderText="Please go back and check your answers" />
This control is used to summarize all validation errors on the page.
Try "ValidationSummary". look for example from here.
http://www.w3schools.com/aspnet/control_validationsummary.asp
I have a page and in that page i have several user controls, so one of them validates a textbox to see if its empty it works fine... but then i have other controls... and one of them has the submit button, so what i want to do is when the button is clicked if the textbox is empty (and it validates correctly) to jump to that section of the page so that the user can see the error.
Right now it is just showing the message but it is all the way down in the page so the error is there, the user is clicking and clicking but does not know the problem is at the top...
How can I focus on that textbox in that control... when clicking on the submit button which is in another control but they are still both in the same page?
I hope you understand the issue if not please ask and i will be happy to assist with more information.
Here is a way to set focus, put this function in OnClientClick of an ASP.NET button control:
function ValidatorFocus()
{
//force .net validation
Page_ClientValidate();
var i;
for (i = 0; i < Page_Validators.length; i++)
{
if (!Page_Validators[i].isvalid)
{
document.getElementById(Page_Validators[i].controltovalidate).focus();
break;
}
}
}
Manually calling ASP.NET Validation with JavaScript
Are you using the built in ASP.NET validators? If so, you should look into the SetFocusOnError.
<asp:textbox id="txt" runat="server">
<asp:RequiredFieldValidator ID="vld" ControlToValidate="txt" SetFocusOnError="true" />
I have a ASP.NET button which sometimes does not post back. I checked this in IE developer and found that when the button does not work options.clientSubmit is set to false in the function WebForm_DoPostBackWithOptions()
My button code
<asp:Button
runat="server"
ID="btnSubmit"
CssClass="button"
OnClick="btnSubmit_Click"
meta:resourcekey="btnSubmitResource1" />
Inside WebForm_DoPostBackWithOptions(options)
if (options.clientSubmit) {
__doPostBack(options.eventTarget, options.eventArgument);
}
Can anyone tell me why the button sometimes works and sometimes does not? what should I do to make it work always?
This may be a possibility:
Check if you have any Validators on the page which have not been grouped to any ValidationGroup and may be visible false(may be due container is visible false). This validator may be validating the control which is of no relevance under this circumstance and causing the postback to cancel saying it invalid.
If you find any, to group all the related controls, assign a ValidationGroup to all the corresponding Validators and then assign that group to your submit control(whichever causes postback). This is most common mistake I have seen..
Try adding CausesValidation = "False" and see what happens. I suspect you have some validation that isn't passing.
You're not using anything to prevent repeated submission of the form?
I had exactly the same issue, the .Net validation method indicated that the form was valid, but options.clientSubmit was always false :S
The culprit turned out to be:
<script type="text/javascript">
$(document).ready(function() {
$('.prevDblSubmit').preventDoubleSubmit();
})
</script>
This seems that should be working, instead of using meta:resourcekey="btnSubmitResource1", try explicit localization. See question: ASP.NET: explicit vs implicit localization?
The __doPostBack is not working in firefox 3 (have not checked 2). Everything is working great in IE 6&7 and it even works in Chrome??
It's a simple asp:LinkButton with an OnClick event
<asp:LinkButton ID="DeleteAllPicturesLinkButton" Enabled="False" OnClientClick="javascript:return confirm('Are you sure you want to delete all pictures? \n This action cannot be undone.');" OnClick="DeletePictureLinkButton_Click" CommandName="DeleteAll" CssClass="button" runat="server">
The javascript confirm is firing so I know the javascript is working, it's specirically the __doPostBack event. There is a lot more going on on the page, just didn't know if it's work it to post the entire page.
I enable the control on the page load event.
Any ideas?
I hope this is the correct way to do this, but I found the answer. I figured I'd put it up here rather then in a stackoverflow "answer"
Seems it had something to do with nesting ajax toolkit UpdatePanel. When I removed the top level panel it was fixed.
Hope this helps if anyone else has the same problem. I still don't know what specifically was causing the problem, but that was the solution for me.
Check your User Agent string. This same thing happened to me one time and I realized it was because I was testing out some pages as "googlebot". The JavaScript that is generated depends on knowing what the user agent is.
From http://support.mozilla.com/tiki-view_forum_thread.php?locale=tr&comments_parentId=160492&forumId=1:
To reset your user agent string type about:config into the location bar and press enter. This brings up a list of preferences. Enter general.useragent into the filter box, this should show a few preferences (probably 4 of them). If any have the status user set, right-click on the preference and choose Reset
I had this same problem (__doPostBack not working) in Firefox- caused a solid hour of wasted time. The problem turned out to be the HTML. If you use HTML like this:
<input type="button" id="yourButton" onclick="doSomethingThenPostBack();" value="Post" />
Where "doSomethingThenPostBack" is just a JavaScript method that calls __doPostBack, the form will not post in Firefox. It will PostBack in IE and Chrome. To solve the problem, make sure your HTML is:
<input type="submit" id="yourButton" ...
The key is the type attribute. It must be "submit" in Firefox for __doPostBack to work. Other browsers don't seem to care. Hope this helps anyone else who hits this problem.
this might seem elemental, but did you verify that your firefox settings aren't set to interfere with the postback? Sometimes I encounter similar problems due to a odd browser configuration I had from a debugging session.
Is it because you are doing return confirm? seems like the return statement should prevent the rest of the code from firing. i would think an if statement would work
if (!confirm(...)) { return false; } _doPostBack(...);
Can you post all the js code in the OnClick of the link?
EDIT: aha, forgot that link button emits code like this
<a href="javascript:__doPostBack()" onclick="return confirm()" />
Are you handling the PageLoad event? If so, try the following
if (!isPostBack)
{
//do something
}
else if (Request.Form["__EVENTTARGET"].ToLower().IndexOf("myevent") >= 0)
{
//call appropriate function.
}
Check if you are getting a call this way, if so then maybe the event is not wired and nedes to be explicitly called.
what do you expect from "Enabled = 'false'" ?
I have had problems with firebug on some web forms, something to do with the network analyser can screw with postbacks.
With or without the OnClientClick event it still doesn't work.
The _doPostBack event is the auto generated javascript that .NET produces.
function __doPostBack(eventTarget, eventArgument) {
if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
theForm.__EVENTTARGET.value = eventTarget;
theForm.__EVENTARGUMENT.value = eventArgument;
theForm.submit();
}
}
*The &95; are underscores, seems to be a problem with the stackoverflow code block format.
Now that i think about it, as noted in my last edit, you want to drop the javascript: in the on client click property. It's not needed, because the onclick event is javascript as it is. try that, see if that works.
Seems it had something to do with nesting ajax toolkit UpdatePanel. When I removed the top level panel it was fixed.
Hope this helps if anyone else has the same problem.
I had this exact same issue in a web app I was working on, and I tried solving it for hours.
Eventually, I did a NEW webform, dropped a linkbutton in it, and it worked perfectly!
I then noticed the following issue:
...
I switch the order to the following, and it immediately was fixed:
...
IE had no issue either way (that I noticed anyway).
I had a similar issue. It turned out that Akamai was modifying the user-agent string because an setting was being applied that was not needed.
This meant that some .NET controls did not render __doPostBack code properly. This issue has been blogged here.
#Terrapin: you got this exactly right (for me, anyways).
I was running User Agent Switcher and had inadvertently left the Googlebot 2.1 agent selected.
In Reporting Services 2008 it was causing the iframes that reports are actually rendered in to be about 300x200 px, and in Reporting Services 2008 R2 is was throwing "__doPostBack undefined" errors in the Error Console.
Switching back to the Default User Agent fixed all my issues.
I had the same problem with Firefox. Instead of using __doPostBack() could you use the jQuery .trigger() method to trigger a click action on an element that has your postback event registered as the click action?
For example, if you had this element in your aspx page:
<asp:Button runat="server" ID="btnMyPostback" OnClick="btnMyPostback_Click" CssClass="hide" ToolTip="Click here to submit this transaction." />
And your postback event in your controller:
protected void btnMyPostback_Click(object sender, EventArgs e)
{
//do my postback stuff
}
You could do the postback by calling:
$("#btnMyPostback").trigger("click");
This will cause the Page_Load event to fire if you need to do something on Page_Load.