Posted 30 August 2018, 4:43 pm EST
Hi,
The problem is arising because you are assigning a new value to this.data(bounded to itemsSource), i.e you are changing the itemsSource of the grid and whenever the new source is assigned to the grid it resets itself to default values and hence clearing the just applied filterDefinition.
To avoid this you may use any of the following approaches however first is the recommended one:-
1). Don’t change the grid source.
What it means that assign an instance of CollectionView (can also be empty if data is not available) to grid’s itemsSource then whenever you need to change data assign new data to the sourceCollection property of CollectionView.
Please refer to the following code snippet:-
<wj-flex-grid #flex
[itemsSource]="data"
(initialized)="init(flex, filter)"
>
.....some columns defs
<wj-flex-grid-filter #filter></wj-flex-grid-filter>
</wj-flex-grid>
//in equivalent ts file
constructor(private http: HttpClient){
this.data = new wjcCore.CollectionView();
}
async init(flex, filter){
let data = await this.http.get(url).toPromise();
//assign data to collectionView's sourceCollection property
this.data.sourceCollection = data;
//set filter def
filter.filterDefinition = localStorage['filter'];
}
2). Handle grid’s itemsSourceChanged event to re-apply filter def when itemsSource changes
Please refer to the following code snippet:-
//equivalent ts file
async init(flex, filter){
//handle itemsSourceChanged event to set filterDefinition
flex.itemsSourceChanged.addHandler((s,e)=>{
filter.filterDefinition = localStorage['filter'];
});
let data = await this.http.get(url).toPromise();
//assign new items source
this.data = data;
}
You may also refer to the following sample for the full implementation:-
https://stackblitz.com/edit/angular-3mkqiv?file=src%2Fapp%2Fapp.component.ts
~Sharad
