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基于Ionic 3中的第一个下拉选择显示/隐藏第二个下拉选择

show-hide dropdown ionic3 typescript html

2

Pradnya Bhagat · 技术社区 · 8 年前

我是爱奥尼亚的新手,我试图根据第一个下拉列表的选择隐藏第二个下拉列表。我的第一个下拉列表 1、银行 2、现金当我选择银行时,第二个下拉列表将被隐藏,当选择现金时,它将显示第二个下拉列表。

。html文件

<ion-list no-lines>
  <ion-item>
    <ion-label>Payment Mode</ion-label>
    <ion-select [(ngModel)]="paymentmode" (ionChange)="paymentModeChosen()">
      <ion-option [value]="paymentmode" *ngFor="let paymentmode of 
         paymentmodes()">{{paymentmode}}</ion-option>
     </ion-select>
   </ion-item>

  <ion-item  *ngIf="paymentlocations">
    <ion-label>Payment Location</ion-label>
    <ion-select [(ngModel)]="paymentlocation" 
       (ionChange)="paymentLocationChosen()">
    <ion-option  [value]="paymentlocation" *ngFor="let paymentlocation of 
      paymentlocations()">{{paymentlocation}}</ion-option>
  </ion-select>
</ion-item>
</ion-list>

。ts文件

paymentmodes(): string[] {
return [
  "Bank",
  "Cash"
]; }
 paymentmode: string = "Bank";

 paymentlocations(): string[] {
return [
  "Ahmadabad",
  "Chennai",
  "Delhi",
  "Kolkata",
  "Mahad",
  "Mumbai",
  "Pune",
  "Roha",
  "Sahibabad"
];
}

paymentlocation: string = "Ahmadabad";

constructor(public navCtrl: NavController, public navParams: NavParams) {}

paymentModeChosen(): void {
  console.log(this.paymentmode);}

paymentLocationChosen():void{
 console.log(this.paymentlocation);
}}

2 回复 | 直到 8 年前

1

4

Preeti 8 年前

中的更改。ts文件

在中创建新变量。ts文件

public paymentL = true;

然后修改此函数

paymentModeChosen(): void {
    console.log(this.paymentmode);
    if(this.paymentmode == 'Cash'){
      this.paymentL = false;
    }else{
       this.paymentL = true;
    }

  }

html文件中的更改

在html文件ngif“paymentL”中,如果paymentL是“Cash”,则此离子项目不可见,如果是“Bank”,则离子项目可见。

<ion-item  *ngIf="paymentL">
    <ion-label>Payment Location</ion-label>
    <ion-select [(ngModel)]="paymentlocation" 
       (ionChange)="paymentLocationChosen()">
    <ion-option  [value]="paymentlocation" *ngFor="let paymentlocation of 
      paymentlocations()">{{paymentlocation}}</ion-option>
  </ion-select>
</ion-item>

2

Setu Kumar Basak 8 年前

在您的中。html文件

   <ion-list no-lines>
  <ion-item>
    <ion-label>Payment Mode</ion-label>
    <ion-select [(ngModel)]="paymentmode" (ionChange)="paymentModeChosen($event)">
      <ion-option [value]="paymentmode" *ngFor="let paymentmode of 
         paymentmodes()">{{paymentmode}}</ion-option>
     </ion-select>
   </ion-item>

  <ion-item  *ngIf="showPaymentLocation"> // decide whether to show or hide
    <ion-label>Payment Location</ion-label>
    <ion-select [(ngModel)]="paymentlocation" 
       (ionChange)="paymentLocationChosen()">
    <ion-option  [value]="paymentlocation" *ngFor="let paymentlocation of 
      paymentlocations()">{{paymentlocation}}</ion-option>
  </ion-select>
</ion-item>
</ion-list>

//在您的中。ts文件

showPaymentLocation: boolean = false;

constructor(public navCtrl: NavController, public navParams: NavParams) {}

paymentModeChosen(paymentmodeName): void {
  if(paymentmodeName == 'Bank') {
    this.showPaymentLocation = false;
  } else { 
    this.showPaymentLocation = true;
   }
}