var fd = new FormData();
fd.append('file', data.target.files[0]);
return this.http.post(url), fd).map().catch();
使用AngularJS它正在工作但是对于角度4当我使用相同的方式它不工作时。我在上传excel文件时出现磁盘错误。请帮助我。
答案 0 :(得分：1)
以下是一个示例，我用它通过FormData将文件上传到API。
在像<div class="header">
<div class="image">
image of page goes here
</div>
<div class="navigation">
Navigation of page goes here
</div>
</div>
<div class="content">
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</div>这样的服务文件中，您需要创建通过POST方法上传文件的功能。以下是此功能的示例：
upload.service.ts现在您应该在组件中创建上传功能，例如getUploadHeaders() {
let headers = new Headers({'Accept': 'application/json'});
headers.delete('Content-Type');
return headers;
}
addNewPost(newPost: FormData): Observable<FormData> {
const endpoint = 'https://yourApiUrl.com';
return this.http
.post(endpoint, newPost, { headers: this.getUploadHeaders() })
.catch((e) => this.handleError(e));
}
。以下是使用FormData上传函数的示例。
upload.component.ts要通过FormData上传文件，您需要3个参数：API端点上的propertyName，此文件的文件和名称。
在你的fileToUpload: File = null;
constructor(private uploadService: UploadService) { }
handleFileInput(files: FileList) {
this.fileToUpload = files.item(0);
}
saveFileToApi() {
const saveForm: FormData = new FormData();
if (this.fileToUpload) {
saveForm.append('fileFieldNameOnYourApi', this.fileToUpload, this.fileToUpload.name);
}
this.uploadService.addNewPost(saveForm).subscribe(() => {
console.log('Upload success!');
}, error => {
console.log('Upload failed!');
});
}
中，你需要有这样的形式：
upload.component.html答案 1 :(得分：0)
在服务中
public importMassUpdateExcel(file: FormData, id): Observable<any> {
const headers = new Headers({
'Authorization': '',//authorization token
'Content-Type': 'application/json; charset=UTF-8'//
});
const options = new RequestOptions({
headers: headers
});
return this.http
.post(url, file, options)
.map()
.catch();
}