The scheduler performs well with the small number of events we have been rendering using the component. However the volume of events will increase for our use case considerably over time.

We are currently using an OData feed to retrieve the events. Is there any guidance on how best it would be to render events when dealing with a high volume of data?

Should we be loading data per month per user, and then when the user moves to the next month it requests further data? As part of this has any performance testing being carried out on the scheduler to understand what volume of data the scheduler works best with, where performance may start to degrade?

We have our custom transport, where we have implemented our own read. The weird thing that when we call dataSource.read(), sometimes our transport.read gets called, and sometimes no.

Please help

I have a div configured as a kendoSpreadsheet. Using the native "Open..." button in the toolbar, I open an XLSX file that happens to contain named ranges. Importantly, formulae in the spreadsheet are expressed in terms of named ranges.

Some console logging confirms that unfortunately, the named ranges are stripped out of the JSON that is returned from the toJSON() method.

This is my testbed:
                    var kendoSpreadsheet = $("#mySpreadsheetDiv").data("kendoSpreadsheet")
                    console.log(kendoSpreadsheet);// Do we see names preserved? - yes, we can see this via "_workbook/_names"

                    var jsonObject = kendoSpreadsheet.toJSON();
                    console.log(jsonObject);// Do we see names preserved? - no, we don't

So it means that the JSON is actually useless as a representational format. Here's why: 

A typical application requires that I use that same JSON string to re-instantiate that spreadsheet on the server-side, using Telerik.Web.Spreadsheet.Workbook.Load() followed by ToDocument() to convert it to a Telerik.Windows.Documents.Spreadsheet.Model.Workbook.

But a spreadsheet instantiated in this way can't be touched - as soon as I set the value of a cell (specifically, a cell that used to be a Named Range) using Worksheet.Cells[row, column].SetValue(somevalue), the spreadsheet breaks. All the formulae involving named ranges now come up as #NAME? (naturally enough, because the named ranges have been stripped out)

It's a pretty big issue - I haven't seen a serious spreadsheet that does NOT use named ranges. I'm tempted to think I'm missing something. If not, are there any plans for a fix?

Hi,

I'm creating a Kendo Grid from an existing HTML table. Everything works exactly as I need and expected...with one exception. Text alignment.

My table has a few columns with numeric values and I need these right aligned.

I thought it would be as simple as defining a col like this: <col style="text-align:right;" /> But that doesn't work. Oddly, this works: <col style="width:20px;" />

So, I next tried to format the alignment in the <thead> section, but I couldn't find a solution there.

<th data-field="Total" data-type="number" data-template="#= kendo.toString(Total , 'n0')#">Total</th>

I know I could write a template that is applied on a row by row basis, but I don't want to do that. We have a large existing website with lot's of tables and would like to use Kendo UI to replace them...but with minimal dev time.

Any ideas? Cheers

Hi All,

I'm trying to implement a way to force the user to stay in the current tab if there are still unsumitted changes.

Googling around I've found that I should do something like this:

Add a handler to the "select" event

But for some reason it's not working as expected.

Any ideas?

Thank you

Hello

I have a series of Dropdownlists in a mask that all work fine so far. They all have a select event for some background tasks. For programmatically rebuilding these Dropdownlists (in case the user wants to make some changes later on) I rebuild/display first all the Dropdownlists, fill them up by the attached datasources and then set the pre-set value (previously done by user) by triggering the specific select event on the specific Dropdownlist (cascading). But triggering the select event programmatically I got an error: 

TypeError: undefined is not an object (evaluating 'e.item.index')

This error is caused inside the select event (on Dropdownlist) by this line: 

var objectTargetId = this.dataItem(e.item.index()).objectTargetId;

After some investigations I found out that it would be easier to me to switch to change event inside Dropdownlist. The error causing line causes also the same error in change event, so I replaced the line by:

var objectTargetId = this.value();

Works fine so far. 

One of the Dropdownlist has an additional custom field: 

I wonder now how I can access the value of "dataTypeField" inside the change event of this Dropdownlist? Previously (select event) it worked that way: 

My current solution looks like this: 

That seems to work too but I don't feel well going through the specific structure, that might change in future. Is there an easier, more official way to get the value of a custom field (in my case "objectTargetType"?

Regards

We have a custom requirement on the top of column chart as shown in the attachment.

Could you please let me know, if this is feasible using Kendo UI chart library.

Thanks in advance.

I use Kendo UI Grid configured the scrollable->virtual option.

But, the virtual scrolling don't move smoothly when the pageSize is 400.

If the pageSize is 20, the virtual scrolling moves smoothly.

What relates to the pageSize? (my PC's spec?)

I want to configure the pageSize by large number if possible.

Also, the below warning in my browser console displayed when I scrolled.

Does this warning relate to the above problem?

Handling of 'mousewheel' input event was delayed for 239 ms due to main thread being busy. Consider marking event handler as 'passive' to make the page more responive