我有一个 TypeScript 类,我在其中调用了一个调用后端 api 的方法,以从服务器获取数据以放入网格中。目前我有硬编码的列和行只是为了测试我将如何做到这一点。当我按照下面的示例放置列和行设置代码时,我会正确填充网格。export class FooComponent { private columnDefs = []; private rowData = []; private gridOptions: GridOptions; private data: any; constructor(private http:HttpClient ) { this.getFoo();this.gridOptions = <GridOptions>{}; this.gridOptions.columnDefs = [ {headerName: 'Make', field: 'make' }, {headerName: 'Model', field: 'model' }, {headerName: 'Price', field: 'price'} ]; this.gridOptions.rowData = [ { make: 'Toyota', model: 'Celica', price: 35000 }, { make: 'Ford', model: 'Mondeo', price: 32000 }, { make: 'Porsche', model: 'Boxter', price: 72000 } ]; } getFoo(){ this.http.get(`https://xxx`).subscribe(response => { this.data = response; }, error => { console.log(error); }); }但是当我将列和行设置代码放在我想要的 getFoo 方法中时,我的网格数据没有设置,我得到了一个加载框。export class FooComponent { private columnDefs = []; private rowData = []; private gridOptions: GridOptions; private data: any; constructor(private http:HttpClient ) { this.getFoo(); } getFoo(){ this.http.get(`https://xxx`).subscribe(response => { this.data = response; }, error => { console.log(error); }); }我试图通过从 getFoo 返回一个承诺,然后在承诺的“then”中设置列和行数据来解决这个问题,但得到了相同的加载框。这是我的标记。<ag-grid-angular style="width: 700px; height: 500px;" class="ag-theme-balham" [gridOptions]="gridOptions" ></ag-grid-angular>有任何想法吗?
1 回答
繁星淼淼
TA贡献1775条经验 获得超11个赞
你可以这样做:
export class FooComponent {
private columnDefs = [];
private rowData = [];
private gridOptions$: Observable<GridOptions>;
constructor(private http:HttpClient ) {
}
ngOnInit() { this.getFoo(); } // call it here, not in constructor
getFoo(){
this.gridOptions$ = this.http.get(`https://xxx`);
}
您可以通过对其执行 .map 并执行您的业务逻辑来转换 http 请求,并且该响应将是可观察的。
之后就在 html 中这样调用它:
<ag-grid-angular
style="width: 700px; height: 500px;"
class="ag-theme-balham"
[gridOptions]="gridOptions$ | async"
>
这将异步更新模型并为您触发更改检测。
添加回答
举报
0/150
提交
取消