Hi I am working on a custom form field validator, it seems like the custom validator is working by not allowing it to continue to the next page, but it doesn't update the Validation Summary nor does it display the asterisk and the labels that i've made visable. I also have other validators like RequiredFieldValidator on the same field. My ValidationGroup is set, as is the Text and IsValid. I even wrote and set a dummy client side validation method in javascript as some workarounds suggests.
here is the validation summary code in asp.net
<asp:ValidationSummary ID="ValidatorSummary" runat="server" ValidationGroup="Step2" />
here is the custom validator and the required field one
<asp:CustomValidator ID="AddressVerification" runat="server" ErrorMessage="Please enter a valid address." Display="Dynamic" ValidationGroup="Step2" OnServerValidate="AddressVerification_ServerValidate" ClientValidationFunction="CustomValidatorDummy" Text="*" Enabled="true" EnableClientScript="true"></asp:CustomValidator>
<asp:RequiredFieldValidator ID="RFValidatorHomeAddress" runat="server" ErrorMessage="Please enter home address." Text="*" Display="Dynamic" ValidationGroup="Step2" ControlToValidate="txtHomeAddress"></asp:RequiredFieldValidator>
here is the custom validation method in the code behind
protected void AddressVerification_ServerValidate(object sender, ServerValidateEventArgs e)
{
//lets just say it doesn't validate and sets the IsValid to false
lblUspsValidatorResHomeCity.Visible = true;
lblUspsValidatorResHomeState.Visible = true;
lblUspsValidatorResHomeZip.Visible = true;
e.IsValid = false;
}
please advise, thanks.
EDIT:
Answered - as bitxwise mentioned. the validation summary should be placed inside an update panel as well. Thanks!
Like so:
<asp:UpdatePanel ID="UpdatePanelValidationSummaryHome" ChildrenAsTriggers="false" UpdateMode="Conditional"
runat="server">
<ContentTemplate>
<asp:ValidationSummary ID="AddressHomeValidationSummary" runat="server" ValidationGroup="AddressHomeValidationGroup"
CssClass="errors" />
</ContentTemplate>
and then calling the update:
UpdatePanelValidationSummaryHome.Update();
You seem to be missing ControlToValidate in your declaration of CustomValidator.
EDIT
If your CustomValidator aggregates multiple controls, then try this:
ASPX
<asp:TextBox ID="txtMyTextBox" runat="server" />
<asp:CustomValidator ID="AddressVerification" runat="server"
Display="Dynamic"
ErrorMessage="Please enter a valid address."
OnServerValidate="AddressVerification_ServerValidate"
Text="*"
ValidationGroup="Step2" />
<asp:RequiredFieldValidator ID="rfvAddress" runat="server"
ControlToValidate="txtMyTextBox"
Display="Dynamic"
ErrorMessage="Please enter an address"
Text="*"
ValidationGroup="Step2" />
...
<asp:ValidationSummary ID="ValidatorSummary" runat="server"
ValidationGroup="Step2" />
...
<asp:Button ID="btnCheckAddresses" runat="server"
CausesValidation="true"
Text="Check Addresses"
ValidationGroup="Step2" />
CS
protected void AddressVerification_ServerValidate(object source, ServerValidateEventArgs args) {
args.IsValid = !string.IsNullOrEmpty(txtMyTextBox.Text) && !txtMyTextBox.Text.Contains(' ');
}
Note that the validation group of the control invoking the post back has CausesValidation="true" and has the same ValidationGroup as the validators.
EDIT 2
If your postback control was in the UpdatePanel but the ValidationSummary was not, then the partial postback would not have refreshed the ValidationSummary. Once you removed the postback control from the UpdatePanel, I imagine it would then generate a full postback, which would refresh your ValidationSummary.
I don't know what else is in your UpdatePanel, but many people report having issues with their validators being in UpdatePanel's.
Check out MSDN,
When you use the ValidationSummary
control inside an UpdatePanel control,
make sure that the validator control
and the control it is associated with
are in the same panel. For more
information about using the
UpdatePanel control for partial-page
updates, see Partial-Page Rendering
Overview.
as well as this MSDN blog.
Make sure every control (textbox, checkbox, etc) that is being validated, every RequiredValidator, CustomValidator and ValidationSummary has the same ValidationGroup value.
ie.
<asp:CustomValidator ID="CustomValidator6" runat="server" ErrorMessage="The field is required"
ValidationGroup="myValGroup">*</asp:CustomValidator>
Of course this will only work if all the controls are inside the same panel or parent control.
In my case the validation summary was not showing because the submit button was in a separate update panel.
<Triggers>
<asp:PostBackTrigger ControlID="ButtonSubmit" />
</Triggers>
Once I added the above code the summary appeared.
Related
I feel embarrassed to be posting this as I'm pretty sure I'm missing something really simple, and this certainly isn't the first time I've used asp validators. I have the following validator controls:
<asp:RequiredFieldValidator runat="server" ControlToValidate="txtTitle" EnableClientScript="false" ErrorMessage="*" ValidationGroup="groupUpdateAL" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txtAbbr" EnableClientScript="false" ErrorMessage="*" ValidationGroup="groupUpdateAL" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="ddlColour" EnableClientScript="false" ValidationGroup="groupUpdateAL" ErrorMessage="*" />
<asp:Button ID="btnSave" runat="server" Text="Save" ValidationGroup="groupUpdateAL" CausesValidation="true" /><br />
For some reason, if leaving the controls empty I am given the following error:
Length cannot be less than zero.
Parameter name: length
It seems the validation controls aren't catching an invalid input.
What I've Tried:
I suspected it may have been client validation intercepting the postback, which is why you can see EnableClientScript is set to false now. Didn't work.
Try testing page validity in the onclick event of your btnSave :
if(Page.IsValid)
{
//Do your stuff
}
else
{
Response.Write("error");
}
Validation is on new screen
in c# file avalilabel on this image plzz click
on this image
enter image description here
Create database to get querystring
Create connection file in visual studio
I've got a page that contains a huge amount of controls, (gridviews, reportviewers, buttons etc.)
Now I've a couple of textboxes and dropdowns that represent a "form" user might want to fill up and submit by clicking a button. Some of these controls contain "RequiredFieldValidator"s.
<fieldset runat="server" >
<asp:Label ID="lblName" runat="server" Text="Name:" AssociatedControlID="txtName" />
<asp:RequiredFieldValidator ID="rfvTxtName" runat="server" ControlToValidate="txtName" Text="(Required)" />
<asp:TextBox ID="txtName" Width="175px" runat="server" />
....
....
</fieldset>
The problem I encounter is that no other button on the entire asp form can be clicked because of these validation controls.
The question is; how do I set this validation to only listen to that particular fieldset and not the whole page?
Set the ValidationGroup property of those controls to something unique.
More info here.
Set your controll's ValidationGroup property to make them one group . Like
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button"
ValidationGroup="MyGroup" />
The ValidationGroup property specifies which group of controls is
validated on validation. This property is mostly used when there are
several buttons in a form.
ASP.NET ValidationGroup Property
You ca also change property CausesValidation to False for control that you don't want to validate.
I have a few section in an ASP.NET page and need to validate them separately.
Each section has it's own validation summary section so I thought of using the ValidationSummary tag with the ValidationGroup attribute but it does not work.
The following code works but validates all controls in the page:
<asp:TextBox ID="field1" runat="server" TabIndex="1" MaxLength="20" />
<asp:RequiredFieldValidator ID="field1RequiredValidator" ControlToValidate="field1" runat="server"
Display="None" ErrorMessage="mandatory 1" />
<asp:TextBox ID="field2" runat="server" TabIndex="2" MaxLength="20" />
<asp:RequiredFieldValidator ID="field2RequiredValidator" ControlToValidate="field2" runat="server"
Display="None" ErrorMessage="mandatory 2" />
....
<asp:ValidationSummary ID="validationSummary" HeaderText="Sumary" runat="server" />
While the following does not work (no validation whatsoever, on submit I just go to the next page in the wizard):
<asp:TextBox ID="field1" runat="server" TabIndex="1" MaxLength="20" />
<asp:RequiredFieldValidator ID="field1RequiredValidator" ControlToValidate="field1" runat="server"
Display="None" ErrorMessage="mandatory 1" ValidationGroup="xxxx" />
<asp:TextBox ID="field2" runat="server" TabIndex="2" MaxLength="20" />
<asp:RequiredFieldValidator ID="field2RequiredValidator" ControlToValidate="field2" runat="server"
Display="None" ErrorMessage="mandatory 2" ValidationGroup="xxxx" />
....
<asp:ValidationSummary ID="validationSummary" HeaderText="Sumary" runat="server" ValidationGroup="xxxx" />
What am I missing here? Is there extra setup needed or something else?
The default behaviour in ASP.NET is that when the user clicks a button that has no ValidationGroup specified (and has CausesValidation set to true), all validation controls that do not belong to a validation group are validated.
Therefore, to validate a specific group, you need to set the ValidationGroup property of the button that should cause the validation (and also possibly the CausesValidation property).
See the MSDN documentation for Button.ValidationGroup for details and an example.
EDIT: If you need to validate ALL groups on the page, the easiest way is of course to not use validation groups at all. If you however want to validate only some (but more than one) groups, you can do it on the server (in the click handler of the button) by calling:
Validate("groupOne");
Validate("groupTwo");
// ...
Note that this won't trigger client-side validation. See for example this post for a discussion about triggering multiple validation groups on a single button click.
EDIT: I found a blog post describing how to build a reusable "multiple validation group button" for ASP.NET, complete with code. Haven't tried it, but it looks promising.
I'm having an issue with an image button that I have built. When I attach required field validators to the page, they stop the button onclick event from firing. I am pretty perplexed by this as I can't see any issues in my code!
Please could you cast your eyes over this and help me out?
Cheers
<asp:TextBox ID="TB_Newsletter" runat="server" CssClass="nwsltr-input"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" ValidationGroup="V1" runat="server" Display="Dynamic" ControlToValidate="TB_Newsletter" ErrorMessage="You must enter your email address"></asp:RequiredFieldValidator>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1"
runat="server" ValidationGroup="V1" Display="Dynamic"
ValidationExpression="^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*#([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$"
ErrorMessage="Invalid Email Address" ControlToValidate="TB_Newsletter"></asp:RegularExpressionValidator>
<asp:ImageButton ID="IB_SubScri"
ImageUrl="~/_includes/images/buttons/nwsltr-btn.png" runat="server"
onclick="IB_SubScri_Click" CausesValidation="True" ValidationGroup="V1"/>
When you press the button it submits the form, but prior to that the field validators are firing by script - the form won't post if validation fails. <asp:Imagebutton /> and <asp:Button /> types allow you to disable validation when they are pressed:
<asp:ImageButton ... CausesValidation="False"/>
From MSDN on the CausesValidation property:
true if the control causes validation
to be performed on any controls
requiring validation when it receives
focus; otherwise, false. The default
is true.
See this MSDN reference for more information.
Obviously, we assume here that the validator firing when pressing this button is not required.
Change "CausesValidation" to False on your ImageButton
I have a Table with two textboxes. Every textbox has a required validator to make the user insert data in the textbox.
I also have a Login table to confirm user privilages.
When I submit the button of login, the validators from the first table appear and prevent the user from logging in. I changed the login button property (Causes validation ) to false, but the validators which I added in the login table didn't appear.
So please how can I solve this problem.
I think you can solve your problem by using ValidationGroups. Here is an excerpt from a page with a longer explanation for you:
This page has two groups – a “Group1” and a “Group2” of validators. There are then two buttons on the page – when button1 is clicked, the first group of validators will fire. When button2 is clicked, the second group of validators will fire. Postback will be blocked client-side by default if the validation fails:
<html>
<body>
<form runat=“server”>
<asp:textbox id=“TextBox1” runat=“server”/>
<asp:requiredfieldvalidator ValidationGroup=“Group1”
ErrorText=“Need to Fill in Value!”
ControlToValidate=“TextBox1”
runat=“server”/>
<asp:textbox id=“TextBox2” runat=“server”/>
<asp:requiredfieldvalidator ValidationGroup=“Group2”
ErrorText=“Need to Fill in Value!”
ControlToValidate=“TextBox2”
runat=“server”/>
<asp:button text=“Group1” ValidationGroup=“Group1” runat=“server”/>
<asp:button text=“Group2” ValidationGroup=“Group2” runat=“server”/>
</form>
</body>
</html>
What you need to use is a ValidationGroup attribute on both the buttons and the validations. This allows certain actions to only enforce a subset of validators on the page when the button is clicked.
<asp:TextBox ID="txtA" runat="server" />
<asp:RequiredFieldValidator ID="rfvA" runat="server" ErrorMessage="Message." ControlToValidate="txtA" ValidationGroup="A" />
<asp:Button ID="btnA" runat="server" Text="A" ValidationGroup="A" />
<asp:TextBox ID="txtB" runat="server" />
<asp:RequiredFieldValidator ID="rfvB" runat="server" ErrorMessage="Message." ControlToValidate="txtA" ValidationGroup="B" />
<asp:Button ID="btnB" runat="server" Text="B" ValidationGroup="B" />
Now when btnA is clicked, it will only check whether rfvA is valid (checking txtA) and when btnB is clicked, it will only check whether rfvB is valid. And yes you can have multiple validation controls in the same validation group.
When you set the CausesValidation property to false, you were disabling all validation actions for the button, not just the ones you didn't want on.