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Description

For row selection, you can simply play with couple of grid options (see below) and subscribe to onSelectedRowsChanged (a SlickGrid Event that is, it's not an Observable). However please note that onSelectedRowsChanged is a function available on the Grid object and you will need bind to (gridChanged) to get the object when grid is ready. There are 2 types of row selection(s) which you can do.

Note: enableCheckboxSelector and enableExcelCopyBuffer do not work well together, this is because they both share the same Row.SelectionModel and one cancels the other. It is recommended to not use enableExcelCopyBuffer in that case.

Demo

Demo Page / Demo Component

Single Row Selection

For a single row selection, you need to have enableCellNavigation: true, enableSelection: true (or enableRowSelection in <=9.x) and multiSelect: false and as described earlier, subscribe to onSelectedRowsChanged (for that you need to bind to (gridChanged)).

Note: if you want to change from Multiple Selections to Single Selection (and vice-versa), you could use the grid options enableCellNavigation flag, however this is not possible when using Inline Editors since this flag is required. However, there is no other known ways of toggling dynamically.

View

<angular-slickgrid gridId="grid4"
      [columns]="columns"
      [options]="gridOptions"
      [dataset]="dataset"
      (onSelectedRowsChanged)="onSelectedRowsChanged($event.detail.eventData, $event.detail.args)">
</angular-slickgrid>

Component

this.gridOptions = {
  enableAutoResize: true,
  enableCellNavigation: true,
  enableCheckboxSelector: true,
  enableSelection: true, // or `enableRowSelection` in <=9.x
  multiSelect: false,
}

onSelectedRowsChanged(e, args) {
  if (Array.isArray(args.rows)) {
    this.selectedObjects = args.rows.map(idx => {
      const item = grid.getDataItem(idx);
      return item.title || '';
    });
  }
}

Multiple Row Selections

As for multiple row selections, you need to provide selectionOptions.selectActiveRow: false and keep multiSelect enabled (default is true). The other configurations are the same as a Single Selection, which is to enable enableCheckboxSelector and enableSelection (or enableRowSelection in <=9.x). Then as describe earlier, you will subscribe to onSelectedRowsChanged (for that you need to bind to (gridChanged)).

View

<angular-slickgrid gridId="grid4"
      [columns]="columns"
      [options]="gridOptions"
      [dataset]="dataset"
      (onSelectedRowsChanged)="onSelectedRowsChanged($event.detail.eventData, $event.detail.args)">
</angular-slickgrid>

Component

export class Example1 implements OnInit {
  ngOnInit() {
    this.gridOptions = {
      enableAutoResize: true,
      enableCellNavigation: true,
      enableCheckboxSelector: true,

      // `enableRowSelection` in <=9.x OR `enableSelection` in >=10.0
      enableSelection: true,

      // `rowSelectionOptions` in <=9.x OR `selectionOptions` in >=10.x
      selectionOptions: {
        // True (Single Selection), False (Multiple Selections)
        selectActiveRow: false
      },
      // keep `multiSelect` enabled (default) for actual multiple row selection
    }
  }

  onSelectedRowsChanged(e, args) {
    if (Array.isArray(args.rows)) {
      // user clicked on the 1st column, multiple checkbox selection
      console.log('multiple row checkbox selected', event, args);
    }
  }

Changing Dynamically from Single to Multiple Selections (and vice-versa)

If you want to change from Multiple Selections to Single Selection (and vice-versa), you could toggle the grid options enableCellNavigation flag (False when you want Single Selection), however this is not possible when using Inline Editors since this flag is required. Note that there is currently no other ways of toggling dynamically without re-creating the grid.

Mixing Single & Multiple Row Selections

SlickGrid is so powerful and customizable, you could if you wish mix the multiple row selections (cell column 1) and single row selection (any other cell click). For that though, you will need to use 2 SlickGrid Events (onClick and onSelectedRowsChanged). For example we can do it this way:

View

<angular-slickgrid gridId="grid4"
      [columns]="columns"
      [options]="gridOptions"
      [dataset]="dataset"
      (onSelectedRowsChanged)="onSelectedRowsChanged($event.detail.eventData, $event.detail.args)"
      (onClick)="onCellClicked($event.detail.eventData, $event.detail.args)">
</angular-slickgrid>

Component

export class Example1 implements OnInit {
  onSelectedRowsChanged(e, args) {
    // user clicked on the 1st column, multiple checkbox selection
    console.log('multiple row checkbox selected', event, args);
  }

  onCellClicked(e, args) {
    // when clicking on any cell, we will make it the new selected row
    // however, we don't want to interfere with multiple row selection checkbox which is on 1st column cell
    if (args.cell !== 0) {
      grid.setSelectedRows([args.row]);
    }
  }
}

Disable Custom Rows Selections via selectableOverride

You can use selectableOverride to provide custom logic to disable certain rows selections, for example the code below will remove the row selection on every second row.

Component

export class Example1 implements OnInit {
  prepareGrid() {
    this.gridOptions = {
      enableSelection: true, // or `enableRowSelection` in <=9.x
      enableCheckboxSelector: true,
      checkboxSelector: {
        // you can override the logic for showing (or not) the expand icon
        // for example, display the expand icon only on every 2nd row
        selectableOverride: (row: number, dataContext: any, grid: any) => (dataContext.id % 2 === 1)
      },
      multiSelect: false,
      // `rowSelectionOptions` in <=9.x OR `selectionOptions` in >=10.x
      selectionOptions: {
        // True (Single Selection), False (Multiple Selections)
        selectActiveRow: true,
      },
    };
  }
}

Disable External Button when having Empty Selection

When having an external button that you want to work only when there's row selection, there are 2 ways of doing this.

  1. use the onSelectedRowsChanged event (via your View in HTML or via ViewModel)
<button disabled.bind="isMyButtonDisabled">My Button</button>
<angular-slickgrid gridId="grid2"
          [columns]="columns"
          [options]="gridOptions"
          [dataset]="dataset"
          (onSelectedRowsChanged)="handleOnSelectedRowsChanged($event.detail.args)">
</angular-slickgrid>
isMyButtonDisabled = false;

handleOnSelectedRowsChanged(args) {
  this.isMyButtonDisabled = args?.rows?.length === 0;
}
  1. use the onGridStateChanged event (see Grid State & Presets Wiki)
<button disabled.bind="isMyButtonDisabled">My Button</button>
<angular-slickgrid gridId="grid2"
          [columns]="columns"
          [options]="gridOptions"
          [dataset]="dataset"
          (onGridStateChanged)="handleOngridStateChanged($event.detail.args)">
</angular-slickgrid>
isMyButtonDisabled = false;

handleOngridStateChanged(gridState) {
  if (Array.isArray(gridState?.rowSelection.dataContextIds)) {
    this.isMassSelectionDisabled = gridState.rowSelection.dataContextIds.length === 0;
  }
}

Change Row Selections

You can change which row(s) are selected by using the built-in SlickGrid method setSelectedRows(rowIndexes) (passing an empty array will clear all selection), however please note that it requires an array of row indexes as you see them in the UI and it won't work that great with Pagination (if that is what you are looking for then take a look at this Stack Overflow Q&A)

<angular-slickgrid gridId="grid2"
          [columns]="columns"
          [options]="gridOptions"
          [dataset]="dataset"
          (onAngularGridCreated)="angularGridReady($event.detail)">
</angular-slickgrid>
export class Example1 {
  angularGrid: AngularGridInstance;

  angularGridReady(angularGrid: AngularGridInstance) {
    this.angularGrid = angularGrid;
    this.gridObj = angularGrid.slickGrid;
  }

  changeRowSelections() {
    this.angularGrid.slickGrid.setSelectedRows(rowIndexes);

    // OR providing an empty array will clear the row selection
    // this.angularGrid.slickGrid.setSelectedRows([]);
  }
}

Hybrid Selection Model

Starting with v9.10.0, you can now use the new Hybrid Selection Model, this new model will allow you to do Cell Selection & Row Selection in the same grid. This wasn't previously doable before that version because SlickGrid only ever allows 1 selection model to be loaded at once and so we had to load either SlickCellSelectionModel or SlickRowSelectionModel but never both of them at the same time. The new Hybrid Selection Model is merging both of these plugins in a single plugin allowing us to do both type of selections.

Note

You can use { enableSelection: true, selectionOptions: { selectionType: 'mixed' }} grid option to enable the new Hybrid Model, this new model will eventually replace both cell/row selection model in the future since there's no need to keep all these models when only 1 is more than enough

For example, we could use the Excel Copy Buffer (Cell Selection) and use rowSelectColumnIds (Row Selection)

this.gridOptions = {
  // enable new hybrid selection model (rows & cells)
  enableSelection: true,
  // `rowSelectionOptions` in <=9.x OR `selectionOptions` in >=10.x
  selectionOptions: {
    selectActiveRow: true,
    rowSelectColumnIds: ['selector'],
  },

  // when using the ExcelCopyBuffer, you can see what the selection range is
  enableExcelCopyBuffer: true,
  excelCopyBufferOptions: {
    copyActiveEditorCell: true,
    removeDoubleQuotesOnPaste: true,
    replaceNewlinesWith: ' ',
  },
};

Hybrid Selection Model and Drag-Fill

You can also onDragReplaceCells event to drag and fill cell values to the extended cell selection.

View
<angular-slickgrid gridId="grid4"
      [columns]="columns"
      [options]="gridOptions"
      [dataset]="dataset"
      (onSelectedRowsChanged)="onSelectedRowsChanged($event.detail.eventData, $event.detail.args)"
      (onClick)="onCellClicked($event.detail.eventData, $event.detail.args)">
</angular-slickgrid>
Component
this.gridOptions = {
  // enable new hybrid selection model (rows & cells)
  enableSelection: true,
  // ...
};

/** Copy the dragged cell values to other cells that are part of the extended drag-fill selection */
copyDraggedCellRange(args: OnDragReplaceCellsEventArgs) {
  const verticalTargetRange = SlickSelectionUtils.verticalTargetRange(args.prevSelectedRange, args.selectedRange);
  const horizontalTargetRange = SlickSelectionUtils.horizontalTargetRange(args.prevSelectedRange, args.selectedRange);
  const cornerTargetRange = SlickSelectionUtils.cornerTargetRange(args.prevSelectedRange, args.selectedRange);

  if (verticalTargetRange) {
    SlickSelectionUtils.copyCellsToTargetRange(args.prevSelectedRange, verticalTargetRange, args.grid);
  }
  if (horizontalTargetRange) {
    SlickSelectionUtils.copyCellsToTargetRange(args.prevSelectedRange, horizontalTargetRange, args.grid);
  }
  if (cornerTargetRange) {
    SlickSelectionUtils.copyCellsToTargetRange(args.prevSelectedRange, cornerTargetRange, args.grid);
  }
}

Understanding the multiSelect Option

The multiSelect grid option is a critical setting that controls how row selection works across all selection methods (checkboxes, keyboard navigation, and click handlers). Understanding this option is key to implementing the correct selection behavior for your use case.

multiSelect: false (Single Selection Mode)

When multiSelect: false, the grid enforces strict single selection:

  • Checkbox Selection: Clicking a checkbox selects only that row. Clicking a checkbox that's already selected will deselect it (toggle behavior). Only one row can be selected at a time.
  • Keyboard Selection: Using Shift+Arrow keys to extend a range will select only the current row (range is clamped to a single row). Regular arrow navigation moves between rows but doesn't change selection.
  • Overall Behavior: At most one row is selected at any time. If you programmatically select a row while another is selected, only the new row remains selected.

multiSelect: true (Multiple Selection Mode)

When multiSelect: true, the grid allows multiple rows to be selected:

  • Checkbox Selection: Clicking a checkbox adds or removes that row from the selection set. Multiple rows can be checked independently.
  • Keyboard Selection: Using Shift+Arrow keys extends the selection range to include multiple rows. Ctrl/Cmd+Click or Shift+Click can be used to build complex selections.
  • Overall Behavior: Multiple rows can be selected and retained in the selection set.

Selection Methods & multiSelect

All row selection methods respect the multiSelect option:

  1. Checkbox Selection (when enableCheckboxSelector: true): Respects multiSelect setting
  2. Keyboard Selection (Shift+Arrow): Respects multiSelect setting
  3. Programmatic Selection (calling setSelectedRows()): Not restricted by multiSelect but subsequent UI interactions will respect it
  4. Other Selection Handlers: All adhere to the multiSelect constraint

Troubleshooting

Adding a Column dynamically is removing the Row Selection column, why is that?

The reason is because the Row Selection (checkbox) plugin is a special column and Angular-Slickgrid is adding an extra column dynamically for the Row Selection checkbox and that is not reflected in your local copy of columns. To address this issue, you need to get the Angular-Slickgrid internal copy of all columns (including the extra columns), you can get it via getAllColumnDefinitions() from the Grid Service and then you can use to that array and that will work.

<angular-slickgrid gridId="grid17"
    [columns]="columns"
    [options]="gridOptions"
    [dataset]="dataset"
    (onAngularGridCreated)="angularGridReady($event.detail)">
</angular-slickgrid>
angularGridReady(angularGrid: AngularGridInstance) {
  this.angularGrid = angularGrid;
}

addNewColumn() {
  const newColumn = { /*...*/ };

  const allColumns = this.angularGrid.gridService.getAllColumnDefinitions();
  allColumns.push(newColumn);
  this.columns = allColumns.slice(); // or use spread operator [...cols]

  // you could also use SlickGrid setColumns() method
  // this.angularGrid.slickGrid.setColumns(cols);
}

Note The code above is no longer necessary with v10.8.0 and above, the lib will now take care of that for you.