A previously completed bug described here: https://feedback.telerik.com/aspnet-mvc/1476295-moving-files-can-result-in-permanent-deletion seems to have resulted in code that has the potential to delete ALL files if moved a few times.

I have not had a chance to get the latest version since the above mentioned bug was marked as completed, but I have made a couple of attempts to test the new functionality in your Demo system on this page: https://demos.telerik.com/aspnet-mvc/filemanager

Repeating the previous test, I have now found that a few move actions results in what appears at first to be a Copy, rather than a Move, but then a subsequent refresh reveals ALL files have been deleted.

Steps to reproduce on the Demo system:

• Create a New Folder within the Images folder
• Select all images and move them to the new folder
• Open the new folder
• Select all images and move them back to the Images folder
• Repeat the Move actions

I found that after repeating, the files did not appear to move, but seemed had been copied. But a refresh of the Demo page shows that all images had been deleted.

Following the above, here are a couple of screenshots:

Bug report

JPG images can be cropped only in 2 directions: right to left and bottom to top.

Reproduction of the problem

Reproducible in the demos.

Current behavior

Expected/desired behavior

Images can be cropped in all directions.

Environment

• Kendo UI version: 2020.3.1021
• jQuery version: x.y
• Browser: [all]

Bug report

When a Badge is configured in a Button through the Html Helpers in UI for ASP.NET MVC app, the color of the badge is not correctly changed through the ThemeColor helper.

Reproduction of the problem

1. Open the Button Badges Demo - https://demos.telerik.com/aspnet-mvc/button/badges

Current behavior

The color of the badges is not correctly set. For example, even if changing the themes, the color of the "Error" badge is never red (as for example in UI for ASP.NE Core).

Expected/desired behavior

The color of the Badge in a Button should be correctly set by using the ThemeColor option.

Environment

• Kendo UI version: 2020.3.915
• Browser: [all ]

As the title says, I'm getting script errors when attempting to perform a delete function with an MVC grid when in MobileMode.Phone.  The attached project will illustrate the problem.  Just run it and select delete button for one of the items in the far right column.  A popup will appear, but don't click either of the buttons on it yet.  Inspect the html with whatever browser you use (I'm using chrome so I just right click and choose select).  There will be a "Cannot read property 'data' of undefined" error.  If you then click the "Delete" button, you'll get a "Cannot read property 'resolve' of undefined".  Then click on the "Cancel" button and you'll get "Cannot read property 'reject' of undefined".  I'll attach a pic showing these errors.

I need to be able to utilize my grid in mobile phone mode and delete items.  Please help with this.

Also, to get this sample project small enough, I removed the files from the MobileSaveError\lib\KENDOUIMVC\2020.3.915.545 folder.  I figure you can replace those easily enough.  Is that the right thing to do in this case?  I thought maybe I could remove the items in the Packages folder as NuGet/VS will usually restore those.  But wasn't 100% sure on that.  So if you can tell me or link me to an article about what we can remove to shrink the project size for samples when we need to send them, that would be great.

Thank you,
Steven

### Bug report

When the GroupPaging option is enabled and the grid is bound to a DataTable, the server error "Value cannot be null" is observed.


### Environment

* **Kendo UI version:** 2020.3.915
* **jQuery version:** 1.12.4
* **Browser:** [all] 

Bug report

Reproduction of the problem

Dojo example.

1. Click the button to apply new position to the Window

Current behavior

The Window is positioned in the top left corner of its container

If top and left position values are set in pixels instead of percent, positioning works as expected.

Expected/desired behavior

The Window is positioned according to the specified top and left values.

Environment

• Kendo UI version: 2020.3.915
• jQuery version: x.y
• Browser: [all]

Bug report

TextAreaFor editor is missing in ASP.NET Core and ASP.NET MVC wrappers.

Environment

* **Kendo UI version:** 2020.3.915
* **jQuery version:** 1.12.4
* **Browser:** [all] 

Bug report

Regression introduced in R2 2019.

Reproduction of the problem

Dojo example.

1. Focus the empty line between the two lines with text
2. Press Backspace key

Current behavior

The line is not deleted

Expected/desired behavior

The line is deleted

Another scenario:

1. Click at the beginning of the third line (before "Du").
2. Press Backspace key
3. Press Delete key.

Delete has no effect if Backspace is pressed before that. If you continue pressing Delete, it will work, but once you press Backspace, the next time you press Delete, it won't delete the character that follows the cursor position.

Environment

• Kendo UI version: 2020.2.617
• jQuery version: x.y
• Browser: [all]

Bug Report

When the grid is bound to an external dataSource, the AutoBind(false) setting is not serialized and as a result, the grid binds immediately

Reproduction

• Take the basic usage grid demo https://demos.telerik.com/aspnet-mvc/grid/basic-usage
• Extract the data source and set it to the grid
• set AutoBind(false)

    @(Html.Kendo().DataSource<Kendo.Mvc.Examples.Models.CustomerViewModel>()
    .Name("myDs")
    .Ajax(r=>r.Read(a=>a.Action("Customers_Read", "Grid")))
    )
    @(Html.Kendo().Grid<Kendo.Mvc.Examples.Models.CustomerViewModel>()
        .Name("grid")
        .AutoBind(false)
        .DataSource("myDs")
        /* other settings */
    )

Current Behavior

Expected Behavior

The grid should not bind initially.

Environment

Kendo UI version: 2020.2.617

If a large number of files are moved using the drag & drop feature, it is very likely that some will get permanently deleted in the process. This is due to the Destroy routine being initiated before the Create routine has completed. Using the demo page here https://demos.telerik.com/aspnet-mvc/filemanager I've been able to replicate the loss of files. Steps are simply:

• Create a new folder inside the Images folder
• Drag the 10 images into this new folder
• Drag them back
• Repeat
•  

Almost immediately, you will find there's no longer 10 images as the Create routine fails to complete before the Destroy routine is initiated resulting in 1 or more files being lost. With very little effort, I was able to reduce the 10 images down to 6 - I would class this as critical.

After 1 move operation, the 10 files are now just 8:

Bug report

There is empty title attribute of PDFViewer zoom level combobox

Reproduction of the problem

1. Go to https://demos.telerik.com/kendo-ui/pdfviewer/index
2. Inspect the zoom level combobox

Current behavior

Empty "title" attribute

Expected/desired behavior

The "title" attribute of the combobox explains the purpose of the combobox, e. g. Zoom level combobox

Environment

• Kendo UI version: 2020.2.617
• Browser: all

Bug report
PersistSelection does not work when GroupPaging is enabled. Error is thrown: "Cannot read property 'Id' of undefined"

Reproduction of the problem

Dojo: https://dojo.telerik.com/aKixuZAy

Expected/desired behavior
No error shall be thrown and rows should be persisted when GroupPaging is enabled

Environment
Kendo UI version: 2020.2.617
Browser: [all]

Bug report

Reproduction of the problem

Inspect the PanelBar in the Templates demos (MVC/Core).

Current behavior

The root items are rendered as li elements nested directly within a div wrapping element.

Expected/desired behavior

The li elements should be nested in a ul element.

Note: Consider handling the scenario when a Kendo UI for jQuery PanelBar is initialized from a div element.

Environment

• Kendo UI version: 2020.2.617
• jQuery version: x.y
• Browser: [all]

Bug report

Reported in Ticket ID: 1472894.

Reproduction of the problem

Reproducible in this demo.

Current behavior

The content of the tab is not focusable.

Expected/desired behavior

The tabs themselves and the active tab's content should be focusable: https://www.w3.org/TR/wai-aria-practices/examples/tabs/tabs-1/tabs.html

Environment

• Kendo UI version: 2020.2.617
• jQuery version: x.y
• Browser: [all ]

Bug report
DateTimePicker "modern" look does not allow picking of hours in the MVC suite. In jQuery and Core AM/PM is not scrollable, nor selectable 

Reproduction of the problem
https://demos.telerik.com/aspnet-mvc/datetimepicker/component-type
Screencast: https://www.screencast.com/t/i4wi5Rq84PFF

Expected/desired behavior
PM setting must be present/scrollable/selectable

Environment
Kendo UI version: 2020.2.513*
Browser: [all]

Bug report

A server side exception:
System.OverflowException: 'Value was either too large or too small for a Double.'
is thrown on attempting to serialize an existing .pdf file converted to FixedDocument.

Reproduction of the problem

1. Use the DPL Processing demo of the PDFViewer in the MVC demos project.
2. Instead of the default sample.pdf load the Development Plan.pdf file provided in Ticket ID: 1467984

public ActionResult GetInitialPdf(int? pageNumber)
{
    //exception with Development plan.pdf file:
    string filePath = Path.Combine(Server.MapPath("~/Content/web/pdfViewer"), "Development Plan.pdf");
    //it works with the sample.pdf file:
    //string filePath = Path.Combine(Server.MapPath("~/App_Data"), "sample.pdf");
    FileStream stream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
    JsonResult jsonResult;
    FixedDocument doc = FixedDocument.Load(stream);

    if (pageNumber == null)
    {
        jsonResult = Json(doc.ToJson(), JsonRequestBehavior.AllowGet);
    }
    else
    {
        jsonResult = Json(doc.GetPage((int)pageNumber), JsonRequestBehavior.AllowGet);
    }

    jsonResult.MaxJsonLength = int.MaxValue;
    return jsonResult;
}

Current behavior

The exception is thrown during the FixedDocument JSON serialization:

doc.ToJson()

at the following place: ConvertToList method in ArrayExtension class (Telerik.Web.PDF namespace)

Expected/desired behavior

No exceptions are thrown during serialization.

Environment

• Kendo UI version: 2020.2.513
• jQuery version: x.y
• Browser: [all]

Bug report

Currently the MultiSelect allows a custom tag (one that does not correspond to items in its dataSource) to be displayed as selected. For this to work the MultiSelect must have autoBind disabled and the dataValueField option must be set. Once the widget is bound to data it behaves inconsistently, depending on whether there are other pre-selected items and what their index in the dataSource is.

Reproduction of the problem

Dojo example.

1. Focus the MultiSelect

Current behavior

The widget is loaded with data, but the custom tag remains. This leads to the following unexpected behavior: after step 1. deselect "Product1". The item is deselected, the "custom" tag is removed from the input area but the "Product1" tag remains. The behavior is different, if initially "custom" and "Product2" are pre-selected.

Expected/desired behavior

Once the widget is bound any custom tags should be removed. The MultiSelect should display only tags for items that are in its dataSource. For a new item to be displayed as selected, it must be added to the dataSource.

Environment

• Kendo UI version: 2020.2.513
• jQuery version: x.y
• Browser: [all]

Bug report

Calling insertRow multiple times over many sheet data causes a slower performance since 2020.1.219.

Reproduction of the problem

http://dojo.telerik.com/EBEtaFOj (2020.1.114)

1. Click the Add Rows button and wait for the alert.

Current behavior

http://dojo.telerik.com/UJAGUgAl

Hello, our file manager makes 2 read request in a row when the page is loaded, when we load a new path, and when a directory is clicked in the tree view.

Is this normal?

Thanks!

Bug report

Regression introduced in R1 2020. Reproducible with the SASS themes, but the Kendo UI script version has effect on the behavior. For example, the behavior is not reproducible if the latest (2020.1.406) SASS theme is used along with an older (2019.2.1023) version of the kendo.all.min.js file.

Reproduction of the problem

Dojo example.

1. The behavior is exhibited when an event ends at the same time another event starts, as it is demonstrated in the dojo where "Interview" ends and "Meeting" starts at the same time - 06:15.

Current behavior

"Meeting" is displayed below and to the right of "Interview", similarly to how events are displayed when their time spans overlap.

Expected/desired behavior

"Meeting" should be displayed below "Interview".

Environment

• Kendo UI version: 2020.1.406
• jQuery version: x.y
• Browser: [all]