Question

在控制器上，我的fileName值变为空。我的组件中有这段代码。使用Angular 7和.net core 2.1

handleFileInput(event) {

const file = event.target.files[0];
this.fileName = file.name;

console.log('This file - ' + this.fileName);

this.route.params.subscribe(params => {
  this.fileService.getHeaders().subscribe((data: IApiHelper) => {
    this.fileService.createHeader(data);
    this.fileService.saveFileProperties(this.fileName).subscribe(s => {
      console.log('this is inside subscribe - ' + s);
      this.fileName = s;        
    },
      (error) => { console.log(error); }
    );
  });
})

}

这是来自服务的代码：

saveFileProperties(fileName: string ) {return this.http.post<string>('/api/aspera/SaveFileToDatabase',fileName, this.httpOptions);

}

我的控制器需要一个字符串：

public IActionResult SaveFileToDatabase(string fileName){

Answer 1

您需要指定POST应该使用FromBody属性从邮件正文中检索fileName：

public IActionResult SaveFileToDatabase([FromBody]string fileName){

Answer 2

您应该传递具有fileName属性的对象

this.fileService.saveFileProperties({fileName: this.fileName}).subscribe( //..

Angular服务调用中的值为Null

2 个答案: