Developing ASP.NET validator with client-side validation

Question

How to define client-side logic in new ASP.NET validator (not CustomValidator). Can you point me to articles where whole process is described?

Community · Accepted Answer · 2017-05-23 10:27:39Z

1

This article goes through the process of creating a new custom validator by deriving from BaseValidator instead of CustomerValidator.

The trick for getting ASP.NET to execute your JS code is this (in AddAttributesToRender()):

if(this.RenderUplevel) {
    string clientID = this.ClientID;
    Page.ClientScript.RegisterExpandoAttribute(clientID, 
        "evaluationfunction", 
        "MultipleFieldsValidatorEvaluateIsValid");
}

ASP.NET will then call MultipleFieldsValidatorEvaluateIsValid().

Also, see How do I hook up javascript to my CustomValidator control in .Net

edited May 23, 2017 at 10:27

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answered Dec 2, 2009 at 18:53

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Daniel Liuzzi · Accepted Answer · 2009-11-21 05:02:31Z

0

In the ASP.NET MVC world, there's a wonderful validation framework called xVal, which I have used with great success. Apparently there is a port for ASP.NET, xVal for WebForms. I have not used it, but it might be worth a try. Good luck!

edited Nov 21, 2009 at 5:02

answered Nov 21, 2009 at 0:02

Daniel Liuzzi

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