Return 多个对象 Angular 2 种形式

Question

我是新手angular 2. 上传两个或多个文档时，它会列在模板中。列出的文档的每一行都有用于输入附加信息的输入槽。提交时，仅在文档列表的最后一行输入的值被 return 编辑为对象。我希望对文档列表中输入的所有行的值进行 returned。下面是我的代码

模板

<h1 class="separator">Manage Documents</h1>
<!-- in transit -->
<div class="row">
<div class="col-xs-2">
<input type="file" id="uploadFile" style="display: none" (change)='onClickUploadDocument($event)' multiple>
<label for="uploadFile"  class="btn btn-primary">Upload Documents</label>

</div>

<div class="col-xs-6">
<input type="button" value="Select Truck To Send Document" class="btn btn-primary" data-toggle="modal" data-target="#selectTruck">
</div>
</div>


<table cellpadding="4" class="grid" >
<thead><tr><th>Document Name</th><th>Document ID</th><th>Document Type</th><th>Source</th>
<th>Document Date</th><th>Trip ID</th><th>Notes</th><th>Action</th></tr></thead>

<form [ngFormModel]="myform" (ngSubmit)="onSubmit(myform.value)">
<tbody *ngFor="let file of files">
    <tr > 
    <td class="form-group" >{{file.name}}</td>
    <td class="form-group"><input type="text" class="form-control"  ngControl="documentId" #documentId="ngForm"></td>
    <td class="form-group"><input type="text" class="form-control" ngControl="type" #type="ngForm"></td>
    <td class="form-group"><input type="text" class="form-control" ngControl="source" #source="ngForm"></td>
    <td class="form-group"><input type="date" class="form-control" ngControl="date" #date="ngForm"></td>
    <td class="form-group"><input type="text" class="form-control" ngControl="tripId" #tripId="ngForm"></td>
    <td class="form-group"><input type="text" class="form-control" ngControl="notes" #notes="ngForm"></td>
        <td class="form-group">
            <a (click)="remove(file)"><span class="glyphicon glyphicon-remove" aria-hidden="true"></span></a> 

        </td>
    </tr>

</tbody>

</table>
<!-- save button -->
<button type="submit" class="form-group" class="btn  btn-primary " >Save</button>
</form>

组件

 import {Component, OnInit, OnChanges} from '@angular/core';
    import {NgClass, FORM_DIRECTIVES, Control, ControlGroup, FormBuilder } from '@angular/common';
    import {ROUTER_DIRECTIVES} from '@angular/router-deprecated';
    import {FleetService} from '../../fleet/fleetControlPanel/fleetControlPanelService';
    import {DocumentManagementService} from './documentManagementService';

    @Component({
        selector: 'documentManagement',
        templateUrl: 'app/dashboard/features/documents/documentManagement/documentManagementTemplate.html',
        directives: [ROUTER_DIRECTIVES, NgClass, FORM_DIRECTIVES ]
    })

    export class DocumentManagementComponent implements OnInit, OnChanges {

        myform: ControlGroup;
        file: any[];
        files: any[] = [];
        trucks: any[];
        errorMessage: any;
        checked: boolean ;

        // constructor to loop the products in product service file and disply in html
        constructor(private _fleetService: FleetService, private _documentManagementService: DocumentManagementService,
          _formBuilder:  FormBuilder){

            this.myform = _formBuilder.group({
                'documentId': [],
                'type': [],
                'source': [],
                'date': [],
                'tripId': [],
                'notes': []
            })
        }

        ngOnInit(): void {

        }

        ngOnChanges(): void {

        }

        onClickUploadDocument(event){
            console.log("clicked")
            let fileList: FileList = event.target.files;

        console.log("file: ",fileList);
        for (let i = 0; i < fileList.length; i++) {
            var files = fileList[i];
             console.log("files are: ",files);
             this.files.push(files);

        } 
        }

        remove(file: any){

             console.log("delete file:..", file)

              var index = this.files.indexOf(file);
            this.files.splice(index, 1)
            console.log("total files in list:..", this.files)

         }

        onSubmit (documents: any) {
             console.log("returned objects are:..", documents)

        }
    }

有人可以帮助我如何 return 为所有文档输入槽输入值。谢谢。

Answer 1

每一行都绑定到同一个控件实例。您需要将每个绑定到它们自己的实例。

<tbody *ngFor="let file of files let i=index">
    <tr > 
    <td>{{file.name}}</td>
    <td><input type="text" ngControl="documentId{{i}}" #documentId="ngForm"></td>
    <td><input type="text" ngControl="type{{i}}" #type="ngForm"></td>
    <td><input type="text" ngControl="source{{i}}" #source="ngForm"></td>
    <td><input type="date" ngControl="date{{i}}" #date="ngForm"></td>
    <td><input type="text" ngControl="tripId{{i}}" #tripId="ngForm"></td>
    <td><input type="text"ngControl="notes{{i}}" #notes="ngForm"></td>
        <td>
            <a (click)="remove(file)"><span class="glyphicon glyphicon-remove" aria-hidden="true"></span></a> 
        </td>
    </tr>
</tbody>

       this.myform = _formBuilder.group({
       })

       this.files.forEach((f, i) => {
            this.myForm.addControl('documentId' + i, new Control()),
            this.myForm.addControl('type' + i, new Control()),
            this.myForm.addControl('source' + i, new Control()),
            this.myForm.addControl('date' + i, new Control()),
            this.myForm.addControl('tripId' + i, new Control()),
            this.myForm.addControl('notes' + i, new Control()),
       })

当 this.files 更新（添加或删除项目）时，this.form 也需要更新。

您可以考虑将每一行包装在一个组件中，并将其用作控件以简化代码。该组件需要实现 ControlValueAccessor，如

中所示

Return 多个对象 Angular 2 种形式

Return multiple objects Angular 2 forms

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