Enhancement 

Add support for setting ClientHeaderTemplate as a function in Html Helper Grid

Current behavior
ClientHeaderTemplate can be set only as a string

Expected/desired behavior
ClientHeaderTemplate shall allow executing a function 

Environment
Kendo UI version: all
Browser: all

Bug report

The Kendo UI Grid's pager for UI for ASP.NET Core does not have an "All" option and it can't be configured in the Razor syntax.

Current behavior

Using the Kendo UI Grid's pageable.PageSizes, the ALL option is not available for UI for ASP.NET Core as it's only an Int32[].

Expected/desired behavior

The All option should be included like in the UI for ASP.NET MVC Razor Syntax.

Environment

• Kendo UI version: 2020.3.915
• Browser: all

Per the documentation for the Grid's Search Panel:

"When the server operations are enabled, you can search only by using string fields."

This is an oddly-specific limitation to have that causes an awkward user experience. Grids in some areas with limited data might use client operations and, as a result, the Search Panel is capable of searching all columns in a Grid. Other areas, however, might have grids with significantly more data and be using server operations for performance reasons. A side-effect of this would mean the Search Panel is incapable of filtering on non-string fields. This not only might lead to unexpected results to an end-user, but also requires the developer to explicitly list each string field that can be searched. If a developer forgets to list only string fields, the default action will be for it to attempt to filter on all fields. If any fields happen to not be strings, you still get a loading indicator as if it's attempting to filter, but the Ajax request silently fails and returns an error 500 behind the scenes.

There are some manual workarounds discussed here, as well as some information as to why this limitation exists. It seems like the problems causing these limitations are known, as are some rough workarounds to get around it. It would be great if we could get some official support to address this limitation so developers aren't left to either work around it on their own or avoid using this feature altogether. This feature would be great if it weren't for this limitation. A single place to quickly and easily type in something to filter on, and have that filter applied against all columns could definitely save some time and be very useful, but with this limitation with a pretty technical explanation (from an end-user perspective), the unexpected mixed results could instead lead to confusion and frustration, and distrust of this feature.

Bug report

Grid's items are not correctly calculated when a group is expanded and groupPaging is set to "true".

Reproduction of the problem

1. Open this Dojo and run it
2. Expand the "Assistant Sales Agent" group.
3. Expand the "Assistant Sales Representative" group

Current behavior

On the expand of the "Assistant Sales Agent" group, the footer displays the following:

On the expand of the "Assistant Sales Representative" group, the footer displays:

The number of the displayed items is incorrectly calculated

Expected/desired behavior

The number of the displayed items should be calculated based on the number of the rows inside the opened groups

Environment

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

Hello,

i guess i've found some bug in the Version 2020.2.617.

I have upgraded from 2020.1.406 to 2020.2.617

after them it is not in the correct way possible for me to hidde or display the correct columns.

If i click the first or second column nothing happend..

after them i get the wrong fields to hidde or display.. if i use the old js files from your CDN

it works again, but i'm not sure what will not be working in our WebApp if i do so.

/Tino

Hi Team,

I'd like to request adding a configuration to the Kendo UI Grid or ExcelExport event which would be a setting to autofit the Excel sheet columns instead of changing the workbook.sheets.columns.autowidth. 

Thank you!

When a hierarchy grid id contains a dot, the grid fails to generate its detail template. 

The dot(and other legal HTML identifier characters) should be escaped internally by Kendo, so that they can be selected by jQuery and the grid initialized.

Here is a sample Dojo to illustrate:

https://dojo.telerik.com/@bubblemaster/ASivogAF/2

Hi Team ,

I Am trying to export kendo grid content from Server side as i need to do some modification(View model) before exporting to excel. and also i need to add some custom headers while exporting.

Can you please provide me the solution with example with this scenario.

Thanks,

Narasegowda

Bug Report:

Whenever the foreign key column of the grid is configured for multi checkbox filtering and is nullable, the value of the "null" option is sent to the server as "NaN".

Steps to replicate:

1. Set ForeignKey column

2. Make the column nullable

3. Set the filterable.multi option to true

4. filter by the null value

A sample project with reproduction has been shared in Ticket with ID: 1463089

Kendo UI has the property https://docs.telerik.com/kendo-ui/api/javascript/ui/grid/configuration/scrollable that can not be set in the UI for ASP.NET Core with the value TRUE

The reason I am asking is because if I change it on document ready using the grid.setOptions if the grid has autobind then the Read method is executed twice.

Hi guys,

I found out, that the QueryableExtension always generates a ToLower for strings filtered with the equals operator. The ToLower is applied by the FilterOperatorExtensions in this method:

    private static Expression GenerateEqual(
      Expression left,
      Expression right,
      bool liftMemberAccess)
    {
      if (left.Type == typeof (string))
      {
        left = FilterOperatorExtensions.GenerateToLowerCall(left, liftMemberAccess);
        right = FilterOperatorExtensions.GenerateToLowerCall(right, liftMemberAccess);
      }
      return (Expression) Expression.Equal(left, right);
    }

It would be nice, if the to lower is controllable with a parameter. At the moment it generates a to lower in the sql query, which generates a lot of overhead in some situations with large tables.

At the moment I remove all "equal to" filter and apply it manually to the IQueryable object.

Best regards

Moritz

### Bug report


### Reproduction of the problem
On the mobile version on Android 10, the Grid does not enter incell editing.

Dojo to reproduce: https://dojo.telerik.com/oDUBuKAt


### Environment

* **Kendo UI version:** 2020.1.219
* **Browser:** Android 10 Web Browser 

At current when working with the french culture, the year in the date will default be represented with 2Y (dd/MM/yy)

This potentially creates a problem for dates>2030, a date like 01/01/30 would be save as 1930 instead of 2030. 

When looking at other culture such nl-BE, en-GB, 4 digits are always used for the year.

I propose to change this also for the french culture so that dd/MM/yyyy would become the standard format.

PS: You can download the culture file and change it, but you'd experience a problem with the popup editor in combination with a display template... in this case the local culture file will be ignored and 2 digits would still be used for the date

Bug report

When the data source of the grid is set to WebAPI, the Batch option is not available. 

Reproduction of the problem

1. Set the DataSource to WebAPI()

2. Attempt to enable the Batch(true) option.

Description

Reproducible only with the latest version of the suite - 2019.3.1023. The Batch option is available in the 2019.3.917 version.

Environment

* **Kendo UI version:** 2019.3.1023
* **jQuery version:** 1.12.4
* **Browser:** [all] 

When Batch update mode is set to true, Popup editing mode should write back the data to grid and not call the update actions directly upon confirming the popup editing window.

I have a page containing a grid, in the toolbar there are following buttons:

* Add

* Edit

* Delete 

When the user clicks Edit, the selected row is edited using the pop-up window. Alternatively the user can also double click the row to start editing. 

On the bottom of the page there is a Save and Cancel Changes button. The save changes must update all applied changes, the cancel button must undo them.

At current when Popup editing is used and the user confirms the popup window, changes are immediately written to the database. This breaks functionality of the Cancel button. Cancel will now only apply to deletes.

I need popup functionality because I have too many columns to use in-cell editing.

Telerik is ignoring the setting batch(true) when doing popup editing, so this could even be considered a bug instead of a feature request!

With batch editing there are no indicators that the grid is "dirty" after you hit delete, but before you hit the save changes button. [Note, when a user edits a cell, the top corner display a small red flag letting the end user know the cell is dirty and has not been saved/synced to the database yet.] This should be added to let the user know the delete action has not been performed and is in a "pending" state until the save button is pressed. This would be very helpful for UX purposes.

In the meantime, I just apply my own "dirty" class to the save button so end users know to press it before leaving the page if they would like to keep their changes.

Bug report

The Kendo UI Sortable for ASP.NET Core assumes that all selectors are by "id".

Reproduction of the problem

1. Set the .For() option of the Sortable widget to a class selector:

@(Html.Kendo().Sortable()
    .For(".k-grid table")
    // . . . 
)

2. Inspect the page source.

3. The following string is rendered:

<script>
    kendo.syncReady(function () { jQuery("\\.k-grid table").kendoSortable(// options) });
</script>

Expected/desired behavior

The Sortable widget should allow for passing any jQuery selectors.

Environment

* **Kendo UI version:** 2019.3.1023
* **jQuery version:** 1.12.4
* **Browser:** [all] 

Hi!

We're using a drop down list as a grid cell's edit template, but.. our users are unable to properly edit the rows at the bottom of the grid due to drop down list going off the page, and closing when they attempt to scroll.

any ideas?