kendo combobox giving error while enabling and disabling

Question

I am using kendo combobox. I have written below code to enable and disable combobox

  function enableDisableFrameworkAndAltFrameworkVersion(platformVersion) {

        var comboBox = $("#selFrameworkVersion").data("kendoComboBox");

        if (platformVersion === 1 ) {
            comboBox.enable(false);

        }
    }

But this code gives me error as "Uncaught TypeError: Cannot call method 'enable' of undefined "

Please help. Thanks in advance.

Now i followed one example on this link below Disable kendo combo

So now i changed code in my html and added enabled parameter to kendo combobox like below

<input  id="selFrameworkVersion" data-bind="kendoComboBox: { dataTextField: 'Name', dataValueField: 'Id', data:  $root.versionListByProductType, value:  $root.editFrameworkVersion, enabled: enableFrameWorkCombo} />

In my view model i declare one observable like below

self.enableFrameWorkCombo = ko.observable(true);

Then changed my function like below

function enableDisableFrameworkAndAltFrameworkVersion(platformVersion) {

    var comboBox = $("#selFrameworkVersion").data("kendoComboBox");

    if (platformVersion === 1 ) {
        $('#multiAltVersion').attr("disabled", true);
        //comboBox.enable(false);
        self.enableFrameWorkCombo(false);
        return;
    }
    else if (platformVersion === 2 || platformVersion === 3) {
        //comboBox.enable(true);
        self.enableFrameWorkCombo(true);
        $('#multiAltVersion').attr("disabled", true);
    }
    else {
        //comboBox.enable(true);
        self.enableFrameWorkCombo(true);
        $('#multiAltVersion').attr("disabled", false);
    }
}

Now it gives me error

Uncaught Error: Unable to parse bindings.
Message: ReferenceError: enableFrameWorkCombo is not defined;
Bindings value: kendoComboBox: { dataTextField: 'Name', dataValueField: 'Id', data: $root.versionListByProductType, value:  $root.editFrameworkVersion, enabled: enableFrameWorkCombo, optionsCaption: 'Please select Version...' }

What am i doing wrong here?

Answer 1

The fact that is shows "Uncaught TypeError: Cannot call method 'enable' of undefined " while executing:

function enableDisableFrameworkAndAltFrameworkVersion(platformVersion) {
    var comboBox = $("#selFrameworkVersion").data("kendoComboBox");
    if (platformVersion === 1 ) {
        comboBox.enable(false);
    }
}

means that comboBox is undefined. Since it is the result of computing $("#selFrameworkVersion").data("kendoComboBox") means that there is an HTML element with id selFrameworkVersion but it is not a kendoComboBox.

Please, check that when you invoke this function, kendoComboBox is actually initialized.

EDIT:

The following example (running on http://jsfiddle.net/OnaBai/qtaAS/) enables / disable a ComboBox using above function...

function enableDisableFrameworkAndAltFrameworkVersion(platformVersion) {
        var comboBox = $("#selFrameworkVersion").data("kendoComboBox");
        console.log("combobox", comboBox);
        if (platformVersion === 1) {
            comboBox.enable(false);
        } else {
            comboBox.enable(true);
        }
    }

    var viewModel = kendo.observable({
        data                : [
            { "Id": 1, "Name": "node1" },
            { "Id": 2, "Name": "node2" },
            { "Id": 3, "Name": "node3" },
            { "Id": 4, "Name": "node4" },
            { "Id": 5, "Name": "node5" }
        ],
        enableFrameWorkCombo: function () {
            alert("hello");
        }
    });

    $("#disable").on("click", function () {
        enableDisableFrameworkAndAltFrameworkVersion(1);
    });
    $("#enable").on("click", function () {
        enableDisableFrameworkAndAltFrameworkVersion(2);
    });

    kendo.bind($("#selFrameworkVersion"), viewModel);

And the HTML is:

<div><a href="#" id="disable" class="k-button">Disable</a></div>
<div><a href="#" id="enable" class="k-button">Enable</a></div>

<input id="selFrameworkVersion"
       data-role="combobox"
       data-text-field="Name"
       data-value-field="Id"
       value="2"
       data-bind="source : data, enabled: enableFrameWorkCombo"/>