I am new to KENDO UI Gantt Chart, using it for the first time, and facing lots of issues in adding new columns and calculations.

My client's requirement is to have a Duration column based on Planned Start Date and Planned End Date, column should be editable and when I change either PSD or PED duration should be updated, and vice versa that is if I update the duration my Planned End Date should also get updated accordingly.

Requesting help on this, I have attached the code.  

Dear Experts ,

I am currently working on a financial related project where I am using the Kendo Spreadsheet . However, I am facing an issue with regards to authentication and data validation.

Specifically, I would like to know if there is a solution in the Kendo Spreadsheet that can validate authentication with an integrated app before loading data and triggering data to the database.

I have researched this topic extensively, but I have not been able to find a clear solution. Therefore, I am reaching out to the community to seek your guidance and insights. Have any of you faced a similar issue? If so, how did you address it?

Any advice or solution that you can provide on this matter would be greatly appreciated. Thank you in advance for your help and expertise.

Hello,

I'm having a problem updating the model in a Grid Editing with kendo AngularJS.

It looks like the model updates if the field in the schema is set to editable: false but it does not update when is editable: true

here is a DEMO with both inline and popup editing.

When selecting Detroit from the City, the Country should change to USA. It does not do that when the field Country has editable: true, but if you change that to editable: false the page works. The goal here is to have USA selected by default by still give the user the ability to change the Country manually.

https://dojo.telerik.com/usIWIyIS

Is there any way to make this work?

I am working with kendo grids with buttons in each column that display another grid in a modal. The first is using MVC, the modal grid was created dynamically. Each uses kendo dropdownlists to edit cells. The issue occurs like this:

1. A dropdownlist is clicked on in the initial grid,

2. The modal is opened afterward (each row has its own button)

3. A dropdownlist inside the modal's kendo grid is clicked, and nothing happens

Basically, if a dropdown is clicked in grid 1, and then you attempt to click one of the dropdownlists in the modal grid, 
this error is thrown:

Uncaught TypeError: m is not a function
    at init.editor (kendo.all.min.js:54)
    at init.refresh (kendo.all.min.js:54)
    at new init (kendo.all.min.js:54)
    at HTMLTableCellElement.<anonymous> (kendo.all.min.js:26)
    at Function.each (jquery.min.js:2)
    at R.fn.init.each (jquery.min.js:2)
    at R.fn.init.e.fn.<computed> [as kendoEditable] (kendo.all.min.js:26)
    at init.editCell (kendo.all.min.js:59)
    at init.tap (kendo.all.min.js:59)
    at init.trigger (kendo.all.min.js:25)

This error is vague, and on the surface seems like jQuery scripts may be interfering or out of order. I don't think this is the case
because A) I haven't recieved errors like this before and B) the dropdowns work if the modal is opened without any of the dropdowns in the
other grid being touched. It seems as if when a dropdown is clicked in initial grid, somehow it breaks the dropdown in modal grid. They
do not have the same name.

Any ideas on where this console error comes from?

Here is a snippet of the grid being generated in the modal:

 $("#account-tracking-grid").kendoGrid({
        columns: [
            {
                field: "accountName",
                title: "Account Name",
                editable: function () { return false },
                width: "200px",
            },
            {
                field: "accountNumber",
                title: "Account Number",
                editable: function () { return false },
                width: "200px"
            },
            {
                field: "Balance",
                title: "Balance",
                width: "40px",
                template: "<span>#=getIcon(Balance)#</span>",
                editor: dropdownlist,
                headerTemplate: "<span class='verticalText'>Balance</span>"
            }
 ],
        editable: "incell",
        edit: function (e) {
            var container = e.container;
            var dropDownList = container.find("[data-role=dropdownlist]").data("kendoDropDownList");
            if (dropDownList) dropDownList.open();
        },
        dataSource: {
            transport: {
              read: "/Account/Tracking?uniqueId=" + document.getElementById('unid').value
            }
        }
    });
}

function dropdownlist(container, options) {
    $('<input id="account-dropdownlist"/>')
        .appendTo(container)
    $("#account-dropdownlist").kendoDropDownList({
        dataTextField: "text",
        dataValueField: "value",
        dataSource: items,
        change: onChange,
        open: onOpen
    });
}