Asp.Net Validators: Useful Client-Side Properties & Methods

Hi,

This post expose few useful property and methods of Asp.Net Validators at client-side in order to interact with them when needed using JavaScript.

1. Page_IsValid

Use: This is a property exposed by Asp.Net validators in order to check the status of validations performed. Similarly to Page.IsValid property at server-side.

Value: 
True - If all Validations are successful

False - If any one of the Validation fails

2.ValidatorEnable(val, enable)

Parameters:
val:  object, Validator Control Object

enable: bool, Enables/Disables Validation control

How To Call:
ValidatorEnable(document.getElementById('validatorid')); //enable will be true - default or

ValidatorEnable(document.getElementById('validatorid'), true);

Use: To enable/disable Validation Control and to fire Validation of a particular Validator control and it updates Page_IsValid property of page.
It performs 3 things
1. Enable/Disable Validation control (based on parameter, enable)
2. Fires Validation
3. Updates Page_IsValid property to reflect result of Validation performed.
If you want to perform only Step 2 (Fires Validation), you can use below function

3. ValidatorValidate(val, validationGroup, event)

Parameters:
val: object, Validator Control Object

validationGroup: string, Group of validation control

event: event, Event caused Validation to fire
How to call: 
ValidatorValidate(document.getElementById('validatorid')); or
ValidatorValidate(document.getElementById('validatorid'), 'grpAdd'); or
ValidatorValidate(document.getElementById('validatorid'), 'grpAdd', event);
Use: To fire Validation of a particular Validator control but it doesn't updates Page_IsValid property of page.

4.ValidationSummaryOnSubmit(validationGroup)

Parameters:
validationGroup: string, Used to show Validation Summary of this group (if not supplied it will work on all ValidationSummary in page)

How To Call:
ValidationSummaryOnSubmit(); or

ValidationSummaryOnSubmit('grpAdd');

Use: It is used to show ValidationSummary of particular group(if specified). Suppose you have called  ValidatorEnable of a ValidationControl and want to show ValidationSummary on failure, you can use function ValidationSummaryOnSubmit to achieve this.
http://abhijit-j-shetty.blogspot.com/2011/03/aspnet-validation-summary-how-to-show.html