Javascript 角度2+；使用ng2文件上载进行文件上载-子组件不断调用父组件函数

我有一个父组件，其中有两个输入

type=“file”

元素，它们在文件更改时调用函数

getFileForParent（）

：

<input type="file" (change)="getFileForParent()" />

子ts:

getFileForParent(){
    if(this.uploaderForParent.queue[0].file.type != 'application/PDF'){
        this.showError("Please select pdf files only");
        return;
    }
    this.uploaderForParent.uploadAll();
}

getFileForChild(){
    if(this.uploaderForChild.queue[0].file.type != 'application/PDF'){
        this.showError("Please select pdf files only");
        return;
    }
    this.uploaderForChild.uploadAll();
}

uploaderForParent: FileUploader = new FileUploader({ url: 'any' });

  getFileForParent() {
    console.log("Parent");
    console.log(this.uploaderForParent);


    if (this.uploaderForParent.queue[0].file.type != 'application/PDF') {
      alert("Please select pdf files only");
      return;
    }
    //this.uploaderForParent.uploadAll();
  }

<input type="file" ng2FileSelect [uploader]="uploaderForChild" (change)="getFileForChild()" />

uploaderForChild: FileUploader = new FileUploader({ url: 'any' });

getFileForChild() {

    console.log("child");
    console.log(this.uploaderForChild);
    if (this.uploaderForChild.queue[0].file.type != 'application/PDF') {
      alert("Please select pdf files only");
    }
    //this.uploaderForChild.uploadAll();
  }

这对我来说很好

parent.component.html

<h1>
    Parent Component File inputs:
</h1>

<input type="file" ng2FileSelect [uploader]="uploaderForParent" (change)="getFileForParent()" />
<input type="file" ng2FileSelect [uploader]="uploaderForParent" (change)="getFileForParent()" />


<h1>
    Child Component File inputs:
</h1>

<app-child-comopnent></app-child-comopnent>

child.component.html:

getFileForParent(){
    if(this.uploaderForParent.queue[0].file.type != 'application/PDF'){
        this.showError("Please select pdf files only");
        return;
    }
    this.uploaderForParent.uploadAll();
}

getFileForChild(){
    if(this.uploaderForChild.queue[0].file.type != 'application/PDF'){
        this.showError("Please select pdf files only");
        return;
    }
    this.uploaderForChild.uploadAll();
}

uploaderForParent: FileUploader = new FileUploader({ url: 'any' });

  getFileForParent() {
    console.log("Parent");
    console.log(this.uploaderForParent);


    if (this.uploaderForParent.queue[0].file.type != 'application/PDF') {
      alert("Please select pdf files only");
      return;
    }
    //this.uploaderForParent.uploadAll();
  }

<input type="file" ng2FileSelect [uploader]="uploaderForChild" (change)="getFileForChild()" />

uploaderForChild: FileUploader = new FileUploader({ url: 'any' });

getFileForChild() {

    console.log("child");
    console.log(this.uploaderForChild);
    if (this.uploaderForChild.queue[0].file.type != 'application/PDF') {
      alert("Please select pdf files only");
    }
    //this.uploaderForChild.uploadAll();
  }

这对我来说很好

parent.component.html

<h1>
    Parent Component File inputs:
</h1>

<input type="file" ng2FileSelect [uploader]="uploaderForParent" (change)="getFileForParent()" />
<input type="file" ng2FileSelect [uploader]="uploaderForParent" (change)="getFileForParent()" />


<h1>
    Child Component File inputs:
</h1>

<app-child-comopnent></app-child-comopnent>

child.component.html:

getFileForParent(){
    if(this.uploaderForParent.queue[0].file.type != 'application/PDF'){
        this.showError("Please select pdf files only");
        return;
    }
    this.uploaderForParent.uploadAll();
}

getFileForChild(){
    if(this.uploaderForChild.queue[0].file.type != 'application/PDF'){
        this.showError("Please select pdf files only");
        return;
    }
    this.uploaderForChild.uploadAll();
}

uploaderForParent: FileUploader = new FileUploader({ url: 'any' });

  getFileForParent() {
    console.log("Parent");
    console.log(this.uploaderForParent);


    if (this.uploaderForParent.queue[0].file.type != 'application/PDF') {
      alert("Please select pdf files only");
      return;
    }
    //this.uploaderForParent.uploadAll();
  }

<input type="file" ng2FileSelect [uploader]="uploaderForChild" (change)="getFileForChild()" />

uploaderForChild: FileUploader = new FileUploader({ url: 'any' });

getFileForChild() {

    console.log("child");
    console.log(this.uploaderForChild);
    if (this.uploaderForChild.queue[0].file.type != 'application/PDF') {
      alert("Please select pdf files only");
    }
    //this.uploaderForChild.uploadAll();
  }

---

你能分享你的想法吗code@Chellappan完成。你能分享你的ts吗code@Chellappan完成。