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Validation message not disappearing from kendo mvc grid

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Ujjwalkanti
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Ujjwalkanti asked on 04 Apr 2017, 08:02 AM

Hi,

I have implemented a custom validation on the kendo grid. Ex: The column name is "DemandUnit" and value is "kVA"/"kW" or blank. The problem is if I change the value "kVA" to "kVAd" the validation message is showing but if I remove the "d" i.e. from "kVAd" to "kVA" the validation message not go away. I know kendo grid uses "MVVM" model but how I can force to apply validation always.

Here with code,

(function ($, kendo) {
        $.extend(true, kendo.ui.validator, {
            rules: { // custom rules               
                demandunitvalidation: function (input, params) {
                    if (input.is("[name='DemandUnit']") && input.val() != "") {
                        input.attr("data-demandunitvalidation-msg", "Demand unit must be kVA/kW or blank.");
                        return /^(kVA|kW)$/.test(input.val())
                    }
                    return true;
                },
            },
            messages: { //custom rules messages               
                demandunitvalidation: function (input) {
                    // return the message text
                    return input.attr("data-val-demandunitvalidation");
                }
            }
        });
    })(jQuery, kendo);

 

Any help will be appreicated.

Regards,

Ujjwal

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Tsvetina
Telerik team
answered on 05 Apr 2017, 03:00 PM
Hello Ujjwal,

By default, the Kendo UI Validator runs its validation logic on each blur of a given input. So, if you changed the input value with a valid one and then blurred the input, the Validator ran again. It is possible that something in your custom validation prevents it from returning true (valid result). Try debugging the validation function line by line to see if this is so.

Additionally, it is possible that validation is not triggered on blur if you explicitly set validateOnBlur to false in your code. The default value of this property is true.

Regards,
Tsvetina
Telerik by Progress
Try our brand new, jQuery-free Angular 2 components built from ground-up which deliver the business app essential building blocks - a grid component, data visualization (charts) and form elements.
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Ujjwalkanti
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answered on 06 Apr 2017, 11:41 AM

Thanks for the reply. However, I am sorry to say it's not working.I am observing the following scenario:

Initial Value    ChangeValue    IsValidationEventFired onBlur 

kVA                   kVAd               yes

kVAd                 kVA                  no

kVAd                kW                   yes

kW                   kWd                 yes

kWd                 kW                    no

It seems like if revert backs the last restore value after giving the invalid input the validation message does not go away. The same   Even in the sample demo application you can reproduce the issue,

http://demos.telerik.com/aspnet-mvc/grid/editing-custom-validation

just try edit in the first "Chai" to "chai" and revert back the "" to "Chai"

Any solution/workaround will be really helpful.

Regards,

Ujjwal

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Tsvetina
Telerik team
answered on 10 Apr 2017, 12:04 PM
Hello Ujjwal,

You are correct about this. There is an explanation of this behavior in this forum thread:
Validation messages in Grid popup not being removed when valid

There is a sample with a working solution, which I also tried in the local custom editor demo and it works as expected:
@(Html.Kendo().Grid<Kendo.Mvc.Examples.Models.ProductViewModel>()
    .Name("Grid")
    .Columns(columns =>
    {
        columns.Bound(p => p.ProductName);
        columns.Bound(p => p.UnitPrice).Width(120);
        columns.Bound(p => p.UnitsInStock).Width(120);
        columns.Bound(p => p.Discontinued).Width(120);
        columns.Command(command => { command.Edit(); command.Destroy(); }).Width(250);
    })
    .Events(events => events.Edit("onEdit"))
//......

function onEdit(e) {
        var grid = this;
        e.container.on("focusout", "input", function () {
            grid.editable.validatable.validateInput(this);
 
        });
}



Regards,
Tsvetina
Telerik by Progress
Try our brand new, jQuery-free Angular 2 components built from ground-up which deliver the business app essential building blocks - a grid component, data visualization (charts) and form elements.
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Tsvetina
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Ujjwalkanti
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