Questions on Kendo UI for Angular Forum

1 answer

17 views

While working and testing on android using a grid, I've ran into an issue with multiple row selection. I define the grid as:

[selectable]="{enable: true, mode: 'multiple'}"

This works on PC, and on iOS (via the two-finger gesture). On android this does not work, as the gesture doesn't exist.
What is the best way the handle this issue? Add a checkbox column for android so users select multiple rows using the checkbox? define a custom gesture and try to handle it?

Grid

MultiSelect

answered on 11 Jul 2025

1 answer

967 views

selectedKeys is not working after update kendo packages

I've prepared kendo grid with multiselection and everything was fine until I updated kendo packages:

Old versions:

"@progress/kendo-angular-buttons": "^5.5.2",
"@progress/kendo-angular-common": "^1.0.0",
"@progress/kendo-angular-dateinputs": "^4.3.2",
"@progress/kendo-angular-dialog": "^4.2.3",
"@progress/kendo-angular-dropdowns": "^5.5.0",
"@progress/kendo-angular-editor": "^1.2.4",
"@progress/kendo-angular-excel-export": "^3.1.5",
"@progress/kendo-angular-grid": "^4.8.4",
"@progress/kendo-angular-inputs": "^6.4.0",
"@progress/kendo-angular-intl": "^2.0.4",
"@progress/kendo-angular-l10n": "^2.0.0",
"@progress/kendo-angular-label": "^2.3.3",
"@progress/kendo-angular-layout": "^4.2.0",
"@progress/kendo-angular-listview": "^0.2.0",
"@progress/kendo-angular-menu": "^2.0.4",
"@progress/kendo-angular-notification": "^2.1.3",
"@progress/kendo-angular-pager": "^1.0.0",
"@progress/kendo-angular-pdf-export": "^2.0.4",
"@progress/kendo-angular-popup": "^3.0.0",
"@progress/kendo-angular-progressbar": "^1.0.0",
"@progress/kendo-angular-toolbar": "^3.2.1",
"@progress/kendo-angular-tooltip": "^3.0.0",
"@progress/kendo-angular-treelist": "^2.0.0",
"@progress/kendo-angular-treeview": "^5.4.2",
"@progress/kendo-angular-upload": "^6.1.0",
"@progress/kendo-data-query": "^1.5.4",
"@progress/kendo-drawing": "^1.5.12",
"@progress/kendo-theme-default": "^4.23.0",
"@progress/kendo-licensing": "^1.2.1",
After update operation:
"@progress/kendo-angular-buttons": "^8.0.0",
"@progress/kendo-angular-common": "^3.1.0",
"@progress/kendo-angular-dateinputs": "^7.0.1",
"@progress/kendo-angular-dialog": "^7.1.2",
"@progress/kendo-angular-dropdowns": "^7.0.2",
"@progress/kendo-angular-editor": "^4.1.3",
"@progress/kendo-angular-excel-export": "^5.0.1",
"@progress/kendo-angular-grid": "^7.2.3",
"@progress/kendo-angular-inputs": "^9.0.3",
"@progress/kendo-angular-intl": "^4.1.0",
"@progress/kendo-angular-l10n": "^4.0.0",
"@progress/kendo-angular-label": "^4.0.0",
"@progress/kendo-angular-layout": "^7.1.0",
"@progress/kendo-angular-listview": "^4.0.0",
"@progress/kendo-angular-menu": "^4.0.0",
"@progress/kendo-angular-notification": "^4.0.0",
"@progress/kendo-angular-pager": "^4.0.1",
"@progress/kendo-angular-pdf-export": "^4.0.0",
"@progress/kendo-angular-popup": "^5.0.0",
"@progress/kendo-angular-progressbar": "^3.0.0",
"@progress/kendo-angular-toolbar": "^6.0.2",
"@progress/kendo-angular-tooltip": "^4.0.1",
"@progress/kendo-angular-treelist": "^5.0.3",
"@progress/kendo-angular-treeview": "^7.1.0",
"@progress/kendo-angular-upload": "^9.0.2",
"@progress/kendo-data-query": "^1.6.0",
"@progress/kendo-drawing": "^1.16.3",
"@progress/kendo-theme-default": "^5.5.0",
"@progress/kendo-licensing": "^1.2.2",
My Kendo Grid properties:
  <kendo-grid  
  [selectable]="selectableSettings"
  (selectedKeysChange)="keyChange($event)"
  kendoGridSelectBy="id"
  [selectedKeys]="mySelection"
  >
Before update everything was fine I mean, I had correct objects (ids) into mySelection array number property.
Defined property into component:
    mySelection: number[] = [];
Selectable settings:
        this.selectableSettings = {
          checkboxOnly: true,
          mode: "multiple"
        };
KeyChange method:
    keyChange(e){
        this.closeEditor();
        if(e.length > 0) {
            this.isSelectionDisabled = false;
        } else {
            this.isSelectionDisabled = true;
        }
        this.extractDataItems = [];
        this.extract();
    }
Extract method:
    extract() {
        this.mySelection.forEach(idx => {
            this._subs.add(
                this.timeBookings$.pipe(
                    map(items => items.find(item => item.id === idx)
                )).subscribe(r => {
                    if(this.mySelection.length > 0 && r) {
                        this.extractDataItems.push(r);
                    }
                })
            );
        });
    }
Important!
When I'm selecting some rows - mySelection is always empty.
I know that in keyChange(e) method I can do something like:
this.mySelection = e;
and everything will work as should but why it was working correctly before update and after not?
Parameter of:
keyChange(e) - parameter e has correct value all the time

Grid

MultiSelect

answered on 08 Oct 2024

2 answers

269 views

Strange characters in different Kendo objects

We are noticing these characters "â€<" showing up intermittently after updating our kendo-angular dependencies to 15.5.0.
It's not an issue we are able to reproduce every day, and sometimes reloading will fix it, but it will appear at the beginning of kendo window headers, and options in kendo dropdowns. We have not changed anything about our code, nor are we using any special characters ourselves in these locations.

Our angular version is 17.3.12

Is this a known issue? What would the fix be?

Thanks.

answered on 02 Oct 2024

3 answers

2.9K+ views

multiselect with icon of choosing

Hi, I'm trying to create a multi-select item that will have the outside look & behavior of a simple dropdown-list, including using icon of my choosing for the down arrow.

But I'm having trouble locating the icon, I've tried using plain css and play with the positions of the items, but then the icon doesn't stick to the corner of the multi-select wrapper..

Would like some help, I feel like maybe I'm doing it all wrong.

Here is my code:

https://stackblitz.com/edit/angular-kendo-multi-dropdown-look

MultiSelect

answered on 22 May 2024

1 answer

78 views

LoadMoreDirective for MultiSelectTree?

I am presently utilizing a MultiSelectTree to display an extensive hierarchical dataset. Despite employing load on demand, performance suffers notably when a single level contains numerous elements.

I have come across a solution tailored for the TreeView to address this concern, wherein a limit for elements per level can be set, accompanied by a "load more" button once the limit is reached.

Is there a way to adapt this solution for the MultiSelectTree? Alternatively, are there other remedies available for optimizing performance with the MultiSelectTree?

MultiSelect

TreeView

answered on 12 Apr 2024

1 answer

125 views

Hi, How to retain the values selected in kendo multiselect in the first page of the two form pages upon going to second page

I had two page form in which in first page using kendo multiselect and after selecting the options in the first page and going to second page and then returning back to previous page i.e first page where I have selected options is getting blank how to retain the values??

General Discussions

MultiSelect

answered on 03 Apr 2024

1 answer

74 views

changing functionality of the multiselect component

i'm currently using the kendoUI multiselect component, and wondering if there is anyway to change the default functionality, where instead of coloring the selected item. it can be removed from the list once it has been selected populates in the input element and added back to the list once it de-selected.

MultiSelect

answered on 08 Mar 2024

1 answer

212 views

Placeholder text on multiselecttree not working

Hello,

I'm trying to add placeholder text in a multiselecttree element but when nothing is selected I'm not seeing the placeholder text. I'm pretty sure this should be supported, I tried using the same placeholder in a multiselect element and it's working fine.

Am I missing something else here or are placeholders not allowed in multitreeselect?

Here's the code I pulled from the docs site for testing each placeholder: codesandbox_link

Any help is appreciated. Thanks!

https://www.telerik.com/kendo-angular-ui/components/dropdowns/multiselecttree/

MultiSelect

answered on 19 Jan 2024

1 answer

120 views

Custom filter menu issues updating currentFilter

Hi, there, so atm I'm trying to implement a custom filter menu, with kendo multiselect component, but I'm having some issues. So, what's happening it's that the filtering it's not working properly and I think the issue comes beacuse it's not getting the right currentFilter state. When I open the filter button it seems to do the filtering ok, but when I reopen the button, the filters selected previosly don't appear in the ui, despite the filtering persisting and I'm not able to unselect any filter at all, and if i try to filter again selecting new values it will just add the values to the currentFilter and perfoms the filtering adding the new values, plus the ones before.

custom-component.ts

export class CustomMultiSelectFilterComponent implements AfterViewInit {

  @Output() public handleFilterChange = new EventEmitter<CompositeFilterDescriptor>()

  @Input() public data: string[] = []
  @Input() public textField: string = ""
  @Input() public valueField: string = ""
  @Input() public filter: CompositeFilterDescriptor = { logic: "or", filters: [] }
  @Input() public preFilterValue: string | null = null
  @Input() public filterService: FilterService
  @Input() public currentFilter: CompositeFilterDescriptor = { logic: "or", filters: [] }

  public constructor(
    filterService: FilterService
  ) {
    this.filterService = filterService
  }

  public filterChange(filter: CompositeFilterDescriptor): void {
    this.filter = filter
    this.data = filterBy(this.data , filter)
    this.handleFilterChange.emit(filter)
  }

  public onChange(values: string[], filterService: FilterService): void {
    filterService.filter({
      filters: values.map((value) => ({
        field: this.valueField,
        operator: "contains",
        value,
      })),
      logic: "or",
    })
  }

  public ngAfterViewInit(): void {
    if (this.filterService) {
      this.filterService.changes.subscribe((filter: CompositeFilterDescriptor) => {
        this.currentFilter = filter
        console.log("Current Filters:", this.currentFilter)
      })
    }
  }

}

custom-filter.html

<kendo-multiselect
  [data]="data"  
  [valuePrimitive]="true"
  [textField]="textField"
  [valueField]="valueField"
  [value]="filter | filterValues"
  (valueChange)="onChange($event, filterService)"
  >
</kendo-multiselect>

table.html

<kendo-grid
  kendoGridSelectBy="id"
  [kendoGridBinding]="users"
  filterable="menu"
  [sortable]="true"
  [resizable]="true"
  (selectionChange)="selectionChange($event)"
  [selectable]="selectableSettings"
  [selectedKeys]="[selectedKeyArray]"
  (filterChange)="handleFilterChange($event)"
  [filter]="filter"
>
  <kendo-grid-column-group title="{{ 'literal:Users | Total:' | translate }} {{ users.length }}" [columnMenu]="true">
    <kendo-grid-column field="roles" title="{{ 'literal:Roles' | translate }}" [width]="220" [headerStyle]="{ 'font-weight': 'bold' }">
      <ng-template kendoGridFilterMenuTemplate let-filter="filter" let-filterService="filterService">
        <app-custom-multiselect-filter
          [data]="rolesToFilter"
          textField="rolesToFilter"
          valueField="filterRoles"
          [preFilterValue]="preFilter"
          [filterService]="filterService"
          [currentFilter]="filter"
          >
        </app-custom