如何使用 Angular 2/4 开发搜索建议文本框

Posted 2023-03-13

【中文标题】如何使用 Angular 2/4 开发搜索建议文本框

【英文标题】：How to develop search suggestion text box using angular 2/4

【发布时间】：2018-12-11 08:12:44

【问题描述】：

我是 Angular 的新手。我如何开发一个 2/4 角的下拉建议搜索框。单击搜索按钮时，使用以下代码显示详细信息。但是在文本框上键入时尝试显示建议详细信息。与自动完成相同（在搜索期间，将显示“as-you-type”建议。）

component.HTML

        <form role="form">
            <div class="row">
                <div class="form-group">
                    <div class="input-group">
                        <input name="search" 
                            class="form-control" 
                            type="text" 
                            placeholder="Search" 
                            required="" [(ngModel)]='searchcontent'>
                        <span class="input-group-btn">
                            <button 
                                class="btn btn-success ProductSearchBtn" 
                                    type="button" 
                                (click)='FetchItemDetailsSearch(searchcontent)'>
                                    <i class="glyphicon glyphicon-search" 
                                        aria-hidden="true"></i>
                                    <span style="margin-left:10px;">Search</span>
                            </button>
                        </span>
                    </div>
                </div>
            </div>
        </form>
    </div>
</section>
<section class="CommonsubWhiteBg" 
    style='height:850px;overflow-y:scroll; overflow-x:hidden' 
    (scroll)="onScroll($event)">
        <ng-container *ngFor="let item of itemdetails;">
            <article class="row" style="margin:0px;">
                <div class="col-md-12 col-sm-12 col-xs-12 EnquiryMore">
                    <a [routerLink]="['/productdetails',item.ItemID]">
                        <h5>item.ItemCode + ' - ' + item.ItemDescription</h5>
                    </a>
                </div>
            </article>
        </ng-container>
        <ng-container *ngIf="!itemdetails" style="margin:0px;">
            <article class="col-md-12">
                <h3>Loading data...</h3>
            </article>
        </ng-container>
        <ng-container *ngIf="itemdetails&&itemdetails.length==0" 
            class="ItemNotfoundArea row" style="margin:0px;">
            <article class="col-md-12">
                <h1>Sorry</h1>
                <p>Item Not Found</p>
            </article>
        </ng-container>
    </section>

component.ts 文件

FetchItemDetailsSearch(itemcodeordesc: string): void 
    this.pageIndex = 1;
    this.searchflag = 1;
    if (itemcodeordesc.length > 0)
        this.searchcontent = itemcodeordesc;
    else 
        itemcodeordesc = undefined
        this.searchcontent = itemcodeordesc;
    
    this.prevScrollPosition = 0;        
    this._enqService
        .FetchItemDetailsSearch(this.searchcontent, this.pageIndex)
            .subscribe(itemsData => this.itemdetails = itemsData,
                error => 
                    console.error(error);
                    this.statusMessage = 
                        "Problem with the service.Please try again after sometime";
                
            );
        

**Service.ts **

FetchItemDetailsSearch(itemcodeordesc: string, pageIndex: number): 
  Observable<IEnquiryDetails[]> 
    return this._http.get('http://localhost:1234/api/enquirydetails/', 
         params: 
             itemcodeordesc: itemcodeordesc, 
              pageIndex: pageIndex  
        )
    .map((response: Response) => <IEnquiryDetails[]>response.json())
    .catch(this.handleError)

条件：仅尝试使用 Angular 4/2 而不是 jQuery

【参考方案1】：

看看 Angular Material 自动完成组件。

https://material.angular.io/components/autocomplete/examples.

您还可以拥有自己的自定义过滤器功能。下面的示例代码将为您提供实现相同目标的方法。 https://stackblitz.com/angular/krlrmgepmrv?file=app%2Fautocomplete-filter-example.ts

或 试试这个

http://www.angulartutorial.net/2017/03/simple-search-using-pipe-in-angular-2.html

【参考方案2】：

请检查此答案

   <form role="form">
            <div class="row">
                <div class="form-group">
                    <div class="input-group">
                        <input name="search" class="form-control" type="text" placeholder="Search" (keyup)="FetchItemDetailsSearch(searchcontent)" [(ngModel)]="searchcontent">
                        <span class="input-group-btn">
                            <button class="btn btn-success ProductSearchBtn" type="button" (click)='FetchItemDetailsSearch(searchcontent)'><i class="glyphicon glyphicon-search" aria-hidden="true"></i><span style="margin-left:10px;">Search</span></button>
                        </span>
                    </div>
                </div>
            </div>
        </form>

【参考方案3】：

您可以使用 this 等自动完成插件。