I have a form that currently uses an control to submit a form. Everything works perfectly. So now the new requirement is for the "submit' button to be a link. Changing it to a LinkButton control, without changing a SINGLE other thing, breaks the validation.
There is a bit too much code to post in a SO question and I know there's a bit of a lack of detail here, but is there any reason why a LinkButton wouldn't fire ASP.NET validation the same way a Button control would? In theory, they should both operate exactly the same, no?
The current submit button:
<asp:Button ID="btnSubmit" TabIndex="9" Text="Send" ValidationGroup="Forward" runat="server" />
The new submit button:
<asp:LinkButton ID="btnSubmit" TabIndex="9" Text="Send" ValidationGroup="Forward" runat="server" />
The Link button should fires the validation the same way a normal button does, my concerns in your case would be the following:
make sure these is nothing in the server side code stopping this.
make sure in the javascript code there is nothing stopping the "
ASP.NET controls that fire validation has a property called CauseValidation
Be sure all controls should fire validation, has this property set to True
Add attribute CauseValidation="True" to your control but if you want to fire this at particular line at code behind you can use validate the form by the following code:
FormID.Validate();
I know this is old but it has never answered. Did your validator have a "controlTovalidate"? Currently it would appear as if the validator was not firing but in reality it is. It just does not have anything that it is 'watching'. Hope if anyone reaches this thread that this helps even if it is just a little bit.
I was unable to determine the cause of this issue but was able to solve it:
I set the CausesValidation="false" and added at the top of the onclick event this.Validate(linkButton.ValidationGroup) this allows the event to get to the code behind and validation to occur.
Related
I have a button on an ascx control that calls a method on the onClick event:
<asp:Button id="bUpdateText" onClick="FUpdate" ValidationGroup="Update" CausesValidation="False" Text="Update" cssclass="button" runat="server" />
Normally I use this control on it's own page and the button works. This time round however, I am loading this control into a Div that is present on the home page of my site (that way I can show the contents with a little bit of JQuery). However, when I bring the control in this way, the onClick event doesn't fire and I am not sure what could cause that.
Sorry I don't have any code sample but the nature of the site makes it difficult to provide any that would make sense.
In short, what would stop this event firing now?
p.s I have tried adding validation groups to all other buttons and validation controls on the page and there is only ONE form present on the page.
EDIT: I have only just added the validation stuff in to see if that does anything. By default it has been like this and still didn't work:
<asp:Button id="bUpdateText" onClick="FUpdate" Text="Update" cssclass="button" runat="server" />
As mentioned as well, this works when I use this control on it's own page (loaded directly into Default.aspx) so I don't think the case of onClick matters.
EDIT2: I have just noticed that when I click this button, other validation controls on my page are being triggered even though they have their own DIFFERENT validation group?! Taking these controls out doesn't help though.
Thanks.
I have found out what is causing the issue.
This control that I am now including is called on the Page_Finalize() and I am guessing that by this point the viewstate has forgotten it needs to do anything. Loading this control on the page load sorts it out.
Thanks for looking.
To start, if you set the 'causesValidation' property to false, you do not need a validation group.
Additionally, I believe that ASP cares about case when dealing with the OnClick command.
i.e. it should be OnClick not onClick
Yeah, annoying and small, but that might be your problem
You can use Firebug to see what happen in Update validationGroup. it looks like your page execute only client-side button click because of Update validationGroup.
I have a regularexpression validator which validates a valid email. I have two buttons on my form. Submit and undo.
On undo, we are reverting the page state to default
submit has it validationgroup set while undo doesnot have any validationgroup and CausesValidation="false".
Now when i navigate to page and enter invalid emailaddress,i directly click undo. the validator fires and stops my page from posting.however if i press tab and navigate to other control and then click undo,the validator shows error message but posts back and furthur proessing is done.
This is very strange and i want the page to postback without any error message when i click undo.how to achieve it.
<tec:ThemedImageButton runat="server" ID="imgbtnSave" OnClick="imgbtnSave_Click"
ValidationGroup="CustomerGroup"/>
<tec:ThemedImageButton runat="server" ID="imgbtnCancel" CausesValidation="false"
OnClick="imgbtnCancel_Click" />
These are normal image buttons with added themes.CustomerGroup is the validation group for my textbox and regularexpressionvalidator
Are you possibly clicking the undo whilst your focus is still within the email textbox? If so, perhaps the issue is that the initial blur event of the textbox is firing which in turn is calling the email validator and preventing the click / submission.
The first thing to try is to make sure you can enter an invalid email address, move the focus onto a completely different area of the page and then press undo to determine if this is the cause.
Double check your settings.
You might want to check the code behind to make sure you are not overwriting the control settings there. For example, in code, you might have the CausesValidation set to "True" or something like that.
Until you post more information you could do the following in your Undo button:
<asp:Button ID="btnUndo" runat="server" Text="Undo"
OnClientClick="Page_ValidationActive = false;"
OnClick="btnUndo_Click" />
I don't recommend this as it might solve your problem but really doesn't explain what is wired up incorrectly but the Page_ValidationActive = false; will disable all client validation on your page.
I have a back and next button in that there is a OnClientClick validation function.
This function is not called when i click on that, Please help me
Code has given below:
<asp:Button ID="btn_view1_back" runat="server" Text="Back"
CausesValidation="False" ValidationGroup="Form2" />
<asp:Button ID="btn_View1_Next" runat="server" CausesValidation="true" Text="Next"
ValidationGroup="Form2" OnClientClick="return ValidateDropDown();"
UseSubmitBehavior ="true" />
Just to be sure: ValidateDropDown has been defined in the JavaScript, right? OnClientClick is what is executed on the client side, i.e. the javascript.
The other thing might be that the syntax for OnClientClick might need to be different, such as: OnClientClick="ValidateDropDown()"
Your question is a little unclear on which function isn't firing (the JS OnClientClick or the server-side OnClick), but if it's the server-side, make sure ValidateDropDown() is returning true. If it returns false or null or something, the server method won't fire.
Can you post your code for ValidateDropDown? Have you verified that it's firing?
The back button is set not to cause validation, and doesn't have an OnClientClick action defined.
Make sure that the validation is not firing. It can be that validation is firing and you are not able to see the Text or ErrorMessage since it is blank by default.
Your ValidateDropDown method is probably throwing an exception, which causes the postback to happen anyway.
Can you post the contents of that method?
Alternatively, use Firebug and check Break on all script errors in the debug menu.
Also, the OnClientClick code runs in the browser, and the method that it calls must be defined in Javascript, not VB.
You have a breakpoint in your validate function and it's not getting hit? Or you think it's not getting hit because your page is posting back anyway?
I would expect that ValidateDropDown function to get called, but I'm not sure. However, I also don't think it matters. I don't think it matters because it appears you are looking to prevent a postback and this isn't the way to do that. Are you looking to prevent a postback?
If so, I think the best thing to do here is to ditch the button's OnClientClick and instead add a CustomValidator control for your dropdroplist and then set the ClientValidationFunction to "ValidateDropDown". There's already an asp.net client side validation framework, so I'd just build on that.
But I'm just some idiot from the internet, I barely read your question and my reputation is 16, so I definitely wouldn't listen to me.
I'm trying to wire up a CheckBox to handle an event when check/unchecked. If the user has JavaScript enabled, use that, otherwise use a postback.
Here is my code:
<asp:CheckBox ID="ApplicationInProcessCheckBox" runat="server"
Text="Application In Process" AutoPostBack="true"
oncheckedchanged="ApplicationInProcessCheckBox_CheckedChanged"
onclick="return false;" />
The return false in the javascript onclick event is disabling the postback. However, it also won't let the box check or uncheck. (I have more code to add to the javascript event... I just want to get the concept working first).
What am I doing wrong?
I think we can't post back on clicking checkbox without Javascript enabled.
pretty much what the title says.
I am using an Ajax Drop Down as illustrated here:
http://www.asp.net/AJAX/AjaxControlToolkit/Samples/DropDown/DropDown.aspx
using linkbuttons ... is there a way to limit to list?
Thank you.
Edit: I think it was VB 6 maybe that you could select "LimitToList" in a drop down. Meaning the user can only select the values in the drop down and not enter his own data.
Since you're extending a textbox, I think the best option would be to attach an event listener that voids keypresses, you could do this in the ASPX:
<asp:Textbox id="txtFoo" onkeypress="return false;" runat="server"/>
Or, in the code behind:
txtFoo.Attributes.Add("OnKeyPress","return false;");
This will prevent a user from typing in the textbox, essentially creating the effect you want.
A bonus side effect is that a user is allowed to free type an entry if javascript is disabled and the dropdown extender doesn't work.