I've faced the following problem with my aps validator. I have a textbox with asp validator. When the user leaves the textbox empty and click on the submit button the validation message shows, but the page does a postback. Any ideas what may cause this happen?
Heres the validator:
<asp:RequiredFieldValidator ID="valReqName" runat="server"
ControlToValidate="txtName" Display="Dynamic" ErrorMessage="blq blq">
</asp:RequiredFieldValidator>
<asp:TextBox ID="txtName" style="font-family:Tahoma, Geneva, sans-serif;
color: #4F4F4F;" runat="server">
</asp:TextBox>
Many thanks,
Anton
EDIT
I have two tabs in an UpdatePanel. The validation problem is part of the second tab, where the user makes some inputs. When I've remove this trigger:
<asp:AsyncPostBackTrigger ControlID="lnkUpload" EventName="Click" />
The postback problem was solved, but another problem occurred. Well at least the postback is removed. Thanks for all answers.
(lnkUpload is the id of the second tab linkbutton)
EDIT 2
Well here is the solution. It appears that my problem was the same like in this article. http://jeffreypaarhuis.com/2011/08/08/validation-not-working-in-updatepanel/
I'm posting the solution as it might be useful for someone else.
"This is the problem:
When a validator is loaded on the page it creates a bit of javascript to support the clientside validation. When you place a validator inside an usercontrol that isn´t visible by default, and this usercontrol is in an updatepanel, it does not create that javascript properly.
This is the solution:
Outside the updatepanel, I did above, create a dummy validator with a dummy textbox using a dummy validationgroup like so:"
<%--dummy validator to make ajax validation possible--%>
<asp:RequiredFieldValidator runat="server" CssClass="hidden" ControlToValidate="dummyTextBox" ValidationGroup="dummy"></asp:RequiredFieldValidator>
<asp:TextBox runat="server" ID="dummyTextBox" CssClass="hidden"></asp:TextBox>
It appears that my problem was the same like in this article.
Have you tried the solution in this thread:
ASP.net RequiredFieldValidator not preventing postback
Remove the following line from web.config
<xhtmlConformance mode="Legacy"/>
"If I remove the line, my validation works the way I expected it to. Googling that uncovered a bunch of blog posts about how VisualStudio adds that line to the web.config when upgrading web apps from .net 1.1 to .net 3.5.
The blog posts were mainly complaining about how that field interferes with .net's AJAX stuff, but I'm guessing it messes with the JavaScript emitted for the RequiredFieldValidator in a similar fashion."
Please add ValidationGroup to your validator(valReqName) and button.
Add this attribute to your validator.
EnableClientScript="True"
Related
I reference a previous post: Focus lost on partial postback with UserControls inside UpdatePanel
where an excellent solution works perfectly for web-page controls within a form.
However, I have placed my UC inside a detailsview template-field (for Edit+Insert).
The UC contains an UpdatePanel needed to adjust the text-formatting and control's style(s) following the TextChanged event of the UC-textbox (AutoPostback=True) during the Edit-mode and Insert-modes of the DetailsView.
As such, when the DetailsView-control is in Edit-mode, and user changes Text in the UC, the textchanged event is fired and the user-entered value is validated and when OK, the thousounds-separator (comma) are added to the UC-textbox-text, BUT, the focus moves to the next field in the DetailsView and QUICKLY returns back to the UC-control.
This incorrect focus-move(s) does NOT occur when the UC is wrapped in updatepanels as noted in the referenced post since the focus and tabbing order works perfectly outside of the DetailsView control.
Here is the aspx markup for the template-field-EDIT (only).
<asp:TemplateField HeaderText="Initial Mileage" SortExpression="IMilage">
<EditItemTemplate>
<asp:UpdatePanel ID="updpnlIMilage" runat="server" UpdateMode="Conditional" >
<ContentTemplate>
<TGANumeric:GANumeric ID="ucnumIMileage" runat="server"
Caption="Initial Mileage" HideCaption="True" Width="160"
DisplayMask="999,999" InputMask="999999"
Enabled="True" IsRequired="False"
MinNumber="0" MaxNumber="999999"
Text='<%# Bind("IMilage") %>'
TabIndex="0"
/>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="ucnumIMileage" />
</Triggers>
</asp:UpdatePanel>
</EditItemTemplate>
Thanks in advance. Your comments are welcome.
Thanks...J.
So are you saying your control hierearchy (partial) is:
UpdatePanel > TGANumeric:GANumeric > UpdatePanel > TextBox
This is an awful lot of overhead to just format a number with a comma, which is the only reason I see for your posting back. As far as I can tell there is nothing you need from the server, so why post?
Or is there?
My thoughts, lose the update panels, disable the AutoPostback on the Textbox, handle the formatting client side if it must be seen immediately, or leave the formatting to the DetailsView field DataStringFormat when it posts after save.
I'm betting this will clear up any focus issues.
Based on all the comments in this thread, I want to explain the actual root cause of the tabbing misbehavior.
1) There were no coding issues or event-issues with the user-control.
2) There were no coding issues or event-issues with the layering of Master-page, Content-page, Ajax update-panels / nested update-panels, details-view and template-fields containing the user-control.
3) The real culprit was a small snippet of code where the page adjusts the web-controls on the form based on the "state" (status) of the page/form. I manage the adjusting of visible and/or enabling of web-controls in a single subroutine in the code-behind so that all of this enabling/disabling visible/not-visible occurs in one place under a set of CASE-statements.
The actual erroneous snippet of code inside the 'sbSetFormState()'-method was messing with the class-variable 'm_eFormState' that actually caused the update panel to re-fire and thus the tabbing got thrown out of sequence.
This was discovered by the great suggestion from 'fnostro' to remove or add functionality features until the mis-behavior exposes itself.
I mark this topic as resolved/closed.
Again, thanks to fnostro !!!
I have run into the same problem as described here.
Only the question is marked as answered with only an explanation as to why you may have to click twice when using a RequiredFieldValidator on input fields - once as the blur of a textbox(for example) will correct the validation and then again to actually post the form.
I don't want to have to click a button twice! Does anyone know a solution or workaround to this?
You could add EnableClientScript=false to the validator.
That prevents the client-side validation, so you will always get a postback (which may not exactly be what you want, though). The validation will still be done, just server-side.
Be sure to wrap the button-click logic in a if (Page.IsValid) { ... }, to check the status of the validators.
Apologies for not posting code previously I assumed this to be a standard problem with the RequiredFieldValidator, but have since realised my particular problem was coming from a CompareValidator, used to ensure entered passwords matched.
The CompareValidator was causing the issue that I described, causing me to have to click away from the field to blur and validate, before being able to click on the post button.
I'm not sure why but changing the Display of the CompareValidator from Dynamic to Static has cleared the problem up.
If the validator is Display="Dynamic", and the appearance of the error message causes the submit button to move, then the MouseUp event is not received by the submit button. In this case, the validation fires and clears the error message, but the submit button does not fire. To solve the problem, either set the the validators to be Display="Static", or rearrange the form so that the submit button does not move when error messages appear.
Here's a way to reserve about one, vertical line of space for a dynamic validation message:
<div style="height:1.5em;overflow:visible;">
<asp:RequiredFieldValidator ID="R1" runat="server"
ErrorMessage="Name is required" ControlToValidate="TextBoxName"
Display="Dynamic"></asp:RequiredFieldValidator>
</div>
I did not find it necessary to set EnableClientScript="false", although that did help for a CustomValidator that had no client-side validation function implemented.
Posting your code is always a good idea, That way we could run your code in a test environment and modify it to ensure it works before posting our answer.
I would suggest adding
causesValidation="true"
to your button to see if that works.
I have a better idea.
Add Text="" to textbox Control.
Add InitialValue="" to Validator Control.
What it will do, when it will be posting, it will find the value of the text box is still the initail value and it will throw an error and the form will not be posted.
Try this:
<asp:RequiredFieldValidator ID="reqFieldCloseComment" ControlToValidate="tbCloseComment" ValidationGroup="ChangeStatus" ErrorMessage="Please enter a reason" Display="Dynamic" runat="server" InitialValue=""></asp:RequiredFieldValidator>
<asp:TextBox ID="tbCloseComment" runat="server" CausesValidation="true" TextMode="MultiLine" Height="107px" Width="400px" Text=""></asp:TextBox>
<asp:Button ID="btnCloseRequestFinal" Text="Finish" CssClass="CloseReqButton" runat="server" ValidationGroup="ChangeStatus" />
Here is code that is working fine for me and helping to get rid of double click.
<asp:TextBox ID="TextBox1" runat="server" autocomplete="off"
Enabled="true" MaxLength="20" onfocus="SetActiveControl(this);" Text=""
CausesValidation="true" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator1"
runat="server" ControlToValidate="TextBox1" Display="Static" ErrorMessage="Ha!" SetFocusOnError="True" EnableClientScript="true" ForeColor="" InitialValue="" />
$(function() {
$("input.btn").on("click",function(){
if(Page_BlockSubmit == true) {Page_BlockSubmit = false};
})
});
Page_BlockSubmit is a JS variable defined by the js generated from code behind when you define the validator . I haven't went deeper to know why MS need this variable, but the scenario is：
the first click will make Page_BlockSubmit become false.
the second click will check the value of Page_BlockSubmit and return true.
if you implemented the code I posted, every time you click the button, the variable will be set as false which will trigger the submit at every click.
And, you can use google chrome to trace the value of Page_BlockSubmit.
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.
I am getting this error "An extender can't be in a different UpdatePanel than the control it extends". what could be the reason and how to tackle this problem.
You are using an AJAX ToolKit Extender Control to extend the functionality of one of your ASP.NET Controls. You have placed the Extender Control in a different UpdatePanel than the one the Extended Control resides in.
Both Extender and Extended controls must reside in the same UpdatePanel to avoid this exception.
Both Extender and Extended controls must reside in the same UpdatePanel to avoid the exception, this solved my problem.
I had an extra UpdatePanel that was giving this error, so I just had to remove the extra update panel lines of my aspx web page code.
What it says really - you've got an extender control that relates to a control that is in a different updatepanel. This means the extender is unable to act properly on the control it extends. You'll need to move your extender to be within the same updatepanel as the main control
In my case I was using button...outside the Update panel as below shown....
<asp:Button ID="btnClub" runat="server" Text="Club" OnClick="btnClub_Click" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
I just solved it by putting the <asp:Button ID="btnClub" runat="server" Text="Club" OnClick="btnClub_Click" /> inside the
update Panel
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Button ID="btnClub" runat="server" Text="Club" OnClick="btnClub_Click" />
Here you make your panel code
</ContentTemplate>
</asp:UpdatePanel>
Reason :Your iD is mis matching Ex:Text box id or dropdown id mismatch in Calender extender or RequiredFieldValidator
Ex:
Hear Id Value And Target Control Id Must Match .....
Check for controls with extenders that are have the same ID especially if you copy pasted from another form
Hi I got the solution of my problem by myself. The problem occurred when the target
control id of the extender control was different from the control it
had extend inside update panel. I resolved this proble a long time
back and replying now.
This is as much a code maintenance issue as a code issue, but I have a WebForm that no longer checks it CustomValidator. It worked when I last touched the code over a year ago, but it no longer works now that the user has requested some changes ...
The WebForm contains a data-bound drop down with a default " - All -" item with String.Empty as its value. When the user clicks the submit button, the validator should check that the drop down's value is not String.Empty. I've set break points in the client validation code and the server validation code, but neither fire.
Where would you start looking? What are the usual suspects? I have, of course, compared my working copy to what is in source control, but nothing jumps out as being suspicious.
Just in case it matters, here is my code:
<asp:DropDownList ID="_AssessmentDropDown" runat="server" DataSourceID="_AssessmentsData" CausesValidation="true" AutoPostBack="false"
DataTextField="AssessmentName" DataValueField="AssessmentName" OnDataBound="_HandleAssessmentsBound">
</asp:DropDownList>
<asp:CustomValidator ID="_AssessmentValidator" runat="server" ClientValidationFunction="_HandleValidateAssessment_Client"
ControlToValidate="_AssessmentDropDown" ErrorMessage="* You must select an Assessment."
OnServerValidate="_HandleValidateAssessment" />
<asp:ObjectDataSource ID="_AssessmentsData" runat="server"
OldValuesParameterFormatString="original_{0}" SelectMethod="GetData"
TypeName="DataTableAdapters.GET_GRADE_ASSESSMENTSTableAdapter">
<SelectParameters>
<asp:ControlParameter Name="GRADECODE" ControlID="_GradeCodeDropDown" PropertyName="SelectedValue" />
</SelectParameters>
</asp:ObjectDataSource>
I notice a couple of issues
I don't think you need a CausesValidation=true if AutoPostBack is set to false
You do not use validation groups, so that cannot be the cause
Why not use a RequiredFieldValidator?
If you want to fire validation on empty fields, set the ValidateEmptyText property to true
A CustomValidator doesn't fire if the control it is validating has an empty value, so a CustomValidator should always be accompanied by RequiredFieldValidator
Some troubleshooting steps:
Is this the only validator on the form?
Is validation enabled on the page?
Is validation enabled for the targeted control?
Is the validator itself enabled?
I would take a serious look at the ValidationGroup.
If something has been left out of the group, it wouldn't validate anymore. Otherwise, make sure that you don't have any javascript error (for the client side) and that the method that is "OnServerValidate" has a break point inside.
Is the validator in the same validator group as the submit button?