我必须连同图片一起提交表格。我已经尝试过此代码(通过多种方式)但对我不起作用。有没有人有使用 angular2 上传文件的工作演示，请帮助我。
组件.html
<form class="form-horizontal" role="form" >
<div class="form-group">
<label class="control-label col-sm-4" for="myname" style="">Name<span class="asterisk">*</span></label>
<div class="col-sm-7">
<div>
<input type="text" class="form-control" id="myname"
[(ngModel)]="myfile.name">
</div>
</div>
</div>
<div class="form-group">
<label class="control-label col-sm-4" for="myimage">Image</label>
<div class="col-sm-7">
<div>
<input type="file" (change)="fileChangeEvent($event)" placeholder="Upload file..." />
</div>
</div>
</div>
<div class="form-group">
<div class="text-center">
<button type="button" (click)="upload()">Upload</button>
</div>
</div>
</form>
组件.ts
myfile={
"name":"Mubashshir",
"image":''
}
fileChangeEvent(fileInput: any){
this.myfile.image = fileInput.target.files;
}
upload(){
this.base_path_service.PostRequest('http://128.199.190.109/api/school/schoolDetail/',this.myfile)
.subscribe(
data => {
console.log("data submitted");
},
err => console.log(err),
() =>{
console.log('Authentication Complete');
}
);
}
最佳答案
事实上，Http 类目前不支持。
您需要利用底层 XHR 对象来做到这一点:
import {Injectable} from 'angular2/core';
import {Observable} from 'rxjs/Rx';
@Injectable()
export class UploadService {
constructor () {
this.progress$ = Observable.create(observer => {
this.progressObserver = observer
}).share();
}
private makeFileRequest (url: string, params: string[], files: File[]): Observable {
return Observable.create(observer => {
let formData: FormData = new FormData(),
xhr: XMLHttpRequest = new XMLHttpRequest();
for (let i = 0; i < files.length; i++) {
formData.append("uploads[]", files[i], files[i].name);
}
xhr.onreadystatechange = () => {
if (xhr.readyState === 4) {
if (xhr.status === 200) {
observer.next(JSON.parse(xhr.response));
observer.complete();
} else {
observer.error(xhr.response);
}
}
};
xhr.upload.onprogress = (event) => {
this.progress = Math.round(event.loaded / event.total * 100);
this.progressObserver.next(this.progress);
};
xhr.open('POST', url, true);
xhr.send(formData);
});
}
}
有关详细信息，请参阅此插件:https://plnkr.co/edit/ozZqbxIorjQW15BrDFrg?p=info .
在 Angular 仓库中有一个问题和一个待处理的 PR:
关于file-upload - Angular2上传文件的方法，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35985347/