如何在 Angular 2.0 中以编程方式触发 PrimeNG Accordion Click? [英] How to trigger PrimeNG Accordion Click programmatically in Angular 2.0?

问题描述

我有一个如下所示的手风琴.

当链接被点击时，我需要触发所有 p-accordianTab 元素的点击事件.

怎么可能?

<a (click)="openCloseAll()" >{{openCloseAllText}} all</a><p-accordion [multiple]="true"><div class="row" *ngFor="let category of result.Categories"><p-accordionTab #accordianTab header="{{category.Name}}"></p-accordionTab>

</p-手风琴>

我尝试将此#accordionTab"添加到元素并从 TypeScript 访问它，但不起作用:

@ViewChild('accordionTab') 手风琴标签:ElementRef;openCloseAllText: string = "打开";openCloseAll() {//获取所有手风琴并单击它们this.openCloseAllText = this.openCloseAllText ===打开"?"关闭" : "打开";this.accordionTab.nativeElement.click();}类型错误:无法读取未定义的属性nativeElement"

解决方案

为什么不直接使用手风琴本身的 tabs 属性?

<p-accordionTab header="标题内容">正文内容</p-accordionTab></p-手风琴>@ViewChild('accordion') 手风琴:手风琴；closeAllAccordionTabs() {if(!isNullOrUndefined(this.accordion.tabs)){for(让这个.accordion.tabs的标签){if(tab.selected) tab.selected = false;}}}openAllAccordionTabs() {if(!isNullOrUndefined(this.accordion.tabs)){for(让这个.accordion.tabs的标签){if(!tab.selected) tab.selected = true;}}}

I have an accordion as shown below.

When the link is clicked, I'd need to trigger the click event of all p-accordianTab elements.

How is it possible?

<a (click)="openCloseAll()" >{{openCloseAllText}} all</a>
                <p-accordion [multiple]="true">
                    <div class="row" *ngFor="let category of result.Categories">                        

                            <p-accordionTab #accordianTab header="{{category.Name}}">

                            </p-accordionTab>                       

                    </div>
                </p-accordion>

I tried adding this "#accordionTab" to the element and accessing it from TypeScript but doesn't work:

@ViewChild('accordionTab') accordionTab: ElementRef;
 openCloseAllText: string = "Open";
 openCloseAll() {
        // get all accordions and click them
        this.openCloseAllText = this.openCloseAllText === "Open" ? "Close" : "Open";
        this.accordionTab.nativeElement.click();
    }

TypeError: Cannot read property 'nativeElement' of undefined

解决方案

Why not just use the tabs-property of the accordion itself?

<p-accordion #accordion>
    <p-accordionTab header="Header Content">
         Body Content
    </p-accordionTab>
</p-accordion>

@ViewChild('accordion') accordion: Accordion;

closeAllAccordionTabs() {
    if(!isNullOrUndefined(this.accordion.tabs)){
        for(let tab of this.accordion.tabs) {
            if(tab.selected) tab.selected = false;
        }
    }
}

openAllAccordionTabs() {
    if(!isNullOrUndefined(this.accordion.tabs)){
        for(let tab of this.accordion.tabs) {
            if(!tab.selected) tab.selected = true;
        }
    }
}

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