一旦列模型可用,以下代码将实例化jqgrid
以及自定义按钮。这工作正常。
@Component({
selector: 'somecomp',
templateUrl: './somecomp.component.html'
})
export class SomeComponent implements OnInit{
private _someService;
private _route;
constructor(someService:SomeService,route:ActivatedRoute){
this._someService = someService;
this._route = route;
}
ngOnInit(){
this.someService.getColumnModel.subscribe(columnModel=>{
(<any>jQuery('#grid')).jqGrid({
colModel : columnModel,
caption : 'Data Grid',
url : "http://sampleurl.com/data"
});
//custom button
(<any>jQuery('#grid')).navButtonAdd("#pager",{
buttonicon:"ui-icon-add",
onClickButton : () => {
alert(this._route);//Route(...)
this._route.navigate(["/addPage"]);
}
});
...
单击此按钮时,它需要导航到另一个页面,如图所示。但是,该警报未定义,并将错误显示为Cannot read property 'navigate' of undefined
。
如何确保this._route
可用?
尝试替换:
function(){
alert(this._route);//undefined
this._route.navigate(["/addPage"]);
}
跟:
() => {
alert(this._route);//undefined
this._route.navigate(["/addPage"]);
}
否则this
引用作为navButtonAdd
函数的第二个参数传递的对象