When you click on one checkbox, the angular2-multiselect dropdown automatically selects all the boxes

Question

When you click on one checkbox, the angular2-multiselect dropdown automatically selects all the boxes

<angular2-multiselect 
         [data]="sortedDataList | OrderBy : 'clientName'" [(ngModel)]="selectedItem[sortedDataList.clientId]" 
         [settings]="dropdownSettings" name="multiSelect"
        
         (onSelect)="onItemSelect($event, sortedDataList.clientId)" 
         (onDeSelect)="OnItemDeSelect($event,sortedDataList.clientId)"
         (onSelectAll)="onSelectAllItems($event)"
         (onDeSelectAll)="onDeselectAllItems($event)" disabled>
    
  <c-item>
     <ng-template let-item="item">
       <label style="color: #333;min-width: 160px;">{{item.clientName}}- {{item.clientId}}</label>
     </ng-template>
</c-item> 

</angular2-multiselect>

sortedDataList represents the list fetched from the backend and everything is functioning correctly, except for the issue with checkboxes in the dropdown. When attempting to select a single checkbox, all checkboxes get selected instead.

javascript angular typescript multi-select

Answer 1

Answer №1

If you want to achieve this, use the "ng-multiselect-dropdown" feature.

To install:

npm install ng-multiselect-dropdown

Add it to your module (look at app.module.ts):

import { NgMultiSelectDropDownModule } from 'ng-multiselect-dropdown';
// ...

@NgModule({
imports: [
NgMultiSelectDropDownModule.forRoot()
// ...
]
// ...
})
export class AppModule {}

How to Use:

import { Component, OnInit } from '@angular/core';

export class AppComponent implements OnInit {
dropdownList = [];
selectedItems = [];
dropdownSettings = {};
ngOnInit() {
this.dropdownList = [
  { item_id: 1, item_text: 'Mumbai' },
  { item_id: 2, item_text: 'Bangaluru' },
  { item_id: 3, item_text: 'Pune' },
  { item_id: 4, item_text: 'Navsari' },
  { item_id: 5, item_text: 'New Delhi' }
];
this.selectedItems = [
  { item_id: 3, item_text: 'Pune' },
  { item_id: 4, item_text: 'Navsari' }
];
this.dropdownSettings = {
  singleSelection: false,
  idField: 'item_id',
  textField: 'item_text',
  selectAllText: 'Select All',
  unSelectAllText: 'UnSelect All',
  itemsShowLimit: 3,
  allowSearchFilter: true
};
}
onItemSelect(item: any) {
console.log(item);
}
onSelectAll(items: any) {
console.log(items);
}
}

HTML Code :

<ng-multiselect-dropdown
[placeholder]="'custom placeholder'"
[data]="dropdownList"
[(ngModel)]="selectedItems"
[settings]="dropdownSettings"
(onSelect)="onItemSelect($event)"
(onSelectAll)="onSelectAll($event)"
>
</ng-multiselect-dropdown>

For more information, visit: https://www.npmjs.com/package/ng-multiselect-dropdown

Answer 2

If you want to achieve this, use the "ng-multiselect-dropdown" feature.

To install:

npm install ng-multiselect-dropdown

Add it to your module (look at app.module.ts):

import { NgMultiSelectDropDownModule } from 'ng-multiselect-dropdown';
// ...

@NgModule({
imports: [
NgMultiSelectDropDownModule.forRoot()
// ...
]
// ...
})
export class AppModule {}

How to Use:

import { Component, OnInit } from '@angular/core';

export class AppComponent implements OnInit {
dropdownList = [];
selectedItems = [];
dropdownSettings = {};
ngOnInit() {
this.dropdownList = [
  { item_id: 1, item_text: 'Mumbai' },
  { item_id: 2, item_text: 'Bangaluru' },
  { item_id: 3, item_text: 'Pune' },
  { item_id: 4, item_text: 'Navsari' },
  { item_id: 5, item_text: 'New Delhi' }
];
this.selectedItems = [
  { item_id: 3, item_text: 'Pune' },
  { item_id: 4, item_text: 'Navsari' }
];
this.dropdownSettings = {
  singleSelection: false,
  idField: 'item_id',
  textField: 'item_text',
  selectAllText: 'Select All',
  unSelectAllText: 'UnSelect All',
  itemsShowLimit: 3,
  allowSearchFilter: true
};
}
onItemSelect(item: any) {
console.log(item);
}
onSelectAll(items: any) {
console.log(items);
}
}

HTML Code :

<ng-multiselect-dropdown
[placeholder]="'custom placeholder'"
[data]="dropdownList"
[(ngModel)]="selectedItems"
[settings]="dropdownSettings"
(onSelect)="onItemSelect($event)"
(onSelectAll)="onSelectAll($event)"
>
</ng-multiselect-dropdown>

For more information, visit: https://www.npmjs.com/package/ng-multiselect-dropdown

Answer 3

Answer №2

To ensure proper functionality, remember to include the primaryKey in your settings configuration:

this.dropdownSettings = { 
                          singleSelection: false, 
                          text:"Select Countries",
                          selectAllText:'Select All',
                          unSelectAllText:'UnSelect All',
                          enableSearchFilter: true,
                          classes:"myclass custom-class",
                          **primaryKey**:**"your_identifier"**,
                        };

For more information, please refer to: https://github.com/CuppaLabs/angular2-multiselect-dropdown/issues/252

Answer 4

To ensure proper functionality, remember to include the primaryKey in your settings configuration:

this.dropdownSettings = { 
                          singleSelection: false, 
                          text:"Select Countries",
                          selectAllText:'Select All',
                          unSelectAllText:'UnSelect All',
                          enableSearchFilter: true,
                          classes:"myclass custom-class",
                          **primaryKey**:**"your_identifier"**,
                        };

For more information, please refer to: https://github.com/CuppaLabs/angular2-multiselect-dropdown/issues/252

When you click on one checkbox, the angular2-multiselect dropdown automatically selects all the boxes

Answer №1

Answer №2

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