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...
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.
There are two submit buttons on web form, Required field validation is there, i want if i click first submit button, it doesn't check the second submit.
Mean i only want that only first text box Required validation must work?
what should i have to do that i can segregate validation on multiple submit buttons
For more detail, snap shot is included.
What you need is validationGroup property
The required Filed Validator will have following property
<asp:requiredfieldvalidator id="RequiredFieldValidator2"
...
validationgroup="Group1"
...
runat="Server">
</asp:requiredfieldvalidator>
And associated button
<asp:button id="Button1"
text="Validate"
causesvalidation="true"
validationgroup="Group1"
runat="Server" />
In this way you can organise which validation to perform on any specific button click
I am facing a problem in my asp.net web application that i need to display a java script confirmation box on click of Update button and this as per requirements given to me.
Currently I am using onclient click
<asp:Button ID="btnCustomerUpdate" runat="server" CssClass="applybuttonstyle"
Text="Update" onclick="btnCustomerUpdate_Click"
OnClientClick="return confirm('Do you really want to update?');"/>
It's working fine but the problem is i also applied some validation controls on my form fields so if a user leave any field blank and click update button then it shows javascript confirm box and the validation message below that form field.
And it is not desired behavior it should not show the confirmation box until unless all validation are passed.
I hope this is due to because i am using this on client click so please tell me a better solution for that.
Thanks in advance.
you can use Page_ClientValidate in your own confirm function to decide whether to display the confirmation dialog.
Something like:
function validateAndConfirm(message){
var validated = Page_ClientValidate('group1');
if (validated){
return confirm(message);
}
}
And on the server you will have something like:
<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="group1"
ErrorText="Need to Fill in Value!"
ControlToValidate="TextBox2"
runat="server"/>
And your button code will change to:
<asp:Button ID="btnCustomerUpdate" runat="server" CssClass="applybuttonstyle"
Text="Update" onclick="btnCustomerUpdate_Click" ValidationGroup="group1"
OnClientClick="return validateAndConfirm('Do you really want to update?');"/>
Obviously, I cannot test this, but you get the idea.
If you will be using Page_ClientValidate you might find this SO question useful.
You can call the Page_ClientValidate method to ensure the page is valid before asking the user:
if (typeof(Page_ClientValidate) == 'function' && Page_ClientValidate() == false) {
return false;
} else {
return confirm('Do you really want to update?');
}
You should atleast apply validation on client side first and than open a confirmation dialog,
while on server, you have to use server side validation first too in case if user has disabled javascript, and than update the record.
You can also use AJAX to update record, so if a validation message occurs, shows error message and if the validation passed, than you can alert the user but the only disadvantage of using that is you have to re-post the data again. To mitigate this problem you either have to save in temporary table, until user gave confirmation and than delete it from temporary table but obviously it takes a lot of work.
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
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>
**