i am using multiple textboxes in webform and i would to validate each textbox by one validator in which validation like as any textbox does not empty and check the datatype of the input string.For this what of validator i can use and how?
jQuery.Validate is a good one for client side validation and DataAnnotations can be useful for server side validation.
Related
On my FormView I have 4 attributes. User has to provide at least one of them. Is there any way to validate it with built-in ASP.NET Validators, or do I have to subscribe to ItemUpdating/ItemInserting events of FormView, then then validate is manually?
There is no built-in validator for such validation. If you want to stick to framework validation control behavior you can place a CustomValidator on your web form and implement client and server validation routines.
I think you have to suscribe to itemupdating/itemInserting events of FormView and do it manually.
I have a website in ASP.NET (WebForms, NOT MVC) which has a survey form divided in several slides. Each slide has a next button that, obviously does a transition (client-side, not post back or remote request) to the next slide.
In each slide I have several ASP.NET controls with their related validators. I want this validators to be triggered when I click the next button (or maybe when each input loses focus?).
I remembered ASP.NET doing client side validation on lost focus, but maybe I'm wrong... (I quit doing ASP.NET development about 3 years now, so I can't remember)
Thanks
UPDATE:
It would be better to make ASP.NET trigger each validator when the associated control lost focus. I remember ASP.NET doing this (or am I dreaming? =P)
First you need to make sure all of your validators have target controls specified using the "TargetControlID" Attribute on the validators.
Then you can set up a validation group per page and specify the group name in your next button and on the controls themselves.
If you are using regular expression validators you can choose them from this website
To Validate Client Side
If you are using custom validators you can create a client function and specify it on the custom validator using the ClientValidationFunction attribute and by setting EnableclientScript = "true" on the custom validator.
Just be sure your client function has sender and args parameters.
It looks like there's a supplied JavaScript function called Page_ClientValidate which should be callable to check the validation manually from JavaScript. I haven't used it, though, so YMMV.
put all your client-side validators into the same validationgroup and with your 'next' button add the same validation group. When you click the button it will automatically trigger all the validators before it does the post-back.
as to manually triggering the validation...
you might also be able to use ValidatorOnSubmit(). I remember doing this in another project but i'm having a hard time finding the code.
It seems that enabling 'SetFocusOnError' on each validator triggers the validation whenever I try to leave the field.
In short decorate your model, now Data Annotations are supported from Asp.Net 4.5
Check my Answer here..Client side webform validations
I developed a screen in which there are fields like first name,username,password and email. I validated these fields using javascript and came to know that javascript is not that safe. So i decided to validate on server side also. My question is whether i can use asp controls like requiredfieldvalidator, regularexpression validator to validate the form or i have to validate through server side coding??
Usually you can, it depends on how you implement the form, whether you use ASP.NET/SharePoint controls on it
You can definitely use asp controls like requiredfieldvalidator and regularexpression to validate your form. I've done this before.
Extra information
Thing to watch out for: If the page that you put these controls on is a publishing page, e.g. based on a custom layout page where editors can go in change content, the asp validator controls will still try to validate in 'Edit' mode. Therefore any SharePoint out of the box form submissions that added to the form will also trigger that the validation on your custom fields. In my case, I had a form on the page layout and some content fields, every time I edited the page, I couldn't save changes or publish until I filled out my form.
The way around it is either, stick your validator controls in EditModePanels with the PageDisplayMode set to "Display":
<PublishingWebControls:EditModePanel ID="EditModePanel1" SuppressTag="true" runat="server" PageDisplayMode="Display">
Your validator control here
</PublishingWebControls:EditModePanel>
or check for edit mode in the code behind on page load and turn the validators off from there.
Hi
I need to validate two fields in an Asp.net form, where the requirements is like any one of them is required. For example, there is Page title and sub-heading input boxes, so any one of them is required. Can I do it using the validation controls Asp.Net provides?
Any kind of help is greatly appreciated. Thanks in advance.
You can use a CustomValidator control (MSDN) in ASP.NET for special situations that are not supported by any one of the other standard validators. It was created for this reason.
Microsoft describes how to create a custom validation function here.
Here's another tutorial on implementing it.
Or if you google for keywords like "creating a custom validator in asp.net" you can pick and choose from various solutions for your own project.
For your case, as an alternative to using a CustomValidator, you could explicitly change whether your required field validators are enabled by using the ValidatorEnable() JavaScript function.
// disable validation control
ValidatorEnable(RequiredFieldValidator1, false);
You can then write custom logic in JavaScript to determine the case in which each validation control is either enabled or disabled, and tie it to one of the (client-side) events of the text boxes (onblur, onchange, onkeyup, etc).
Then, on the server side you can write similar logic to do the same thing by setting the "Enabled" property and put this logic in your button click event before you check the IsValid state.
If all you are doing is conditionally determining when something is required, changing the enabled state is your best bet. Exactly what can be done is documented in ASP.NET Validation In Depth.
I'm using various ASP.NET controls out of the box such as the CreateUserWizard control, Login control etc... For custom controls, I have sanitized my inputs by making sure they conform to expected values. However, is this required for the controls such as the CreateUserWizard control, or is that handled internally? Do I need to provide any extra server side validation to these controls and, if so, would it be best to do it in the "CreateUserWizardControl_CreatingUser" event?
Thanks
If input is coming from any form, then treat it as suspect. I've included some links here that may help you:
http://www.codersbarn.com/post/2008/11/01/ASPNET-Data-Input-Validation.aspx
If you have request validation enabled then form data with script tags will generate an error automatically.