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
Related
I have a text box with required field validator:-
<asp:TextBox ID="txtCName" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvCName" runat="server" ErrorMessage="Pleas Enter Name" ControlToValidate="txtCName" ></asp:RequiredFieldValidator>
I need to show error message on button click:-
<asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click"
ValidationGroup="sub">
I am using the following code to assign validation group to the required field validator (it is in document.ready() function) :-
$("#<%=rfvCName.ClientID %>").attr('ValidationGroup', 'sub');
But it is not showing any error message on button click. Please help me.
I need to do it using Jquery. I don't want to assign ValidatioGroup directly to the control.
Add validation group ValidationGroup="Sub"
<asp:RequiredFieldValidator ID="rfvCName" runat="server" ErrorMessage="Pleas Enter Name" ValidationGroup="sub" ControlToValidate="txtCName" ></asp:RequiredFieldValidator>
when the page(server side) prerender the object requiredFieldValidator, some javascript is added into page automatically by .net framework.
this javascrript code check the validationgroup.
add manually the validationgroup attribute client-side without this javascript code not work.
you can see this code in developpers tool searching "ValidationGroup"
if you cannot add attribute in html, you can add this attribute in a event server side like load or prerender.
I am making a website and I have made a form fields like email field and validation expressions associated with it. Validation is initiated on text change. But i want it t execute on "submit" button click event.
I have searched but could not locate the solution to my problem. Please tel me why is this happening and how can i make it right. I am new to this web development field, So need help from you guys.
Thanks in advance!!!
Hamad
You could disable showing errors in the validator itself and instead make a validation summary which will be shown only after you click submit.
Like this:
<asp:RequiredFieldValidator runat="server" ControlToValidate="txtEmail" ValidationGroup="vRegister" Display="None" ErrorMessage="Email field cannot be empty"></asp:RequiredFieldValidator>
and then declare a validation summary:
<asp:ValidationSummary runat="server" ID="vSummary" ValidationGroup="vRegister" DisplayMode="BulletList" />
What you should do is change the value of EnableClientScript to false. Then call the validation from your code behind (which should always be done since a user can disable their client side validation anyway. Security rule 1, never trust the client)
EnableClientScript: Gets or sets a value indicating whether client-side validation is enabled.
<asp:TextBox ID="txtName" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvName" runat="server" EnableClientScript="false"
ErrorMessage="*" ControlToValidate="txtName" ></asp:RequiredFieldValidator>
Code Behind:
protected void btnSave_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
//Do stuff
}
//No need for else, the validations should display accordingly
}
Additional resources: http://weblogs.asp.net/rajbk/archive/2007/03/15/page-isvalid-and-validate.aspx
Are you simply looking for the validation type controls to validate input?
If so look at the property EnableValidation and set it to true. Doing so will force the validation of the textbox even before the button_Click event can execute.
Try this:
<asp:TextBox ID="txtName" runat="server" Height="23px"
Width="252px"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvName" runat="server"
ErrorMessage="*" ControlToValidate="txtName"
ValidationGroup="vadd"></asp:RequiredFieldValidator>
The "Causes Validation" property on the button itself will automatically force your page to meet you validation specifications before firing the rest of the code associated with the button press.
If i have understood your question, you need to create a same validation group for each of the validation control in your aspx page. You also need to have a validation summary with same validation group. And atlast in the submit button in aspx page you have to mention same validation group...
In my project, validation is not occurring at button_click and imagebutton_click. Why could it be so?
I also gave same validation group to all validators and button and also CAUSEVALIDATION "true" in button
Please help solve this.
Add validation group to image button too and check. Also check if your image button has image in it. Other wise it will not fire events
**
<asp:TextBox ID="txt_password" runat="server" CssClass="text_box_password" TextMode="Password" Width="180px"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txt_password" ErrorMessage="*" ValidationGroup="aaaa">**</asp:RequiredFieldValidator>
**
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.
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.