使用Asp.net Web和Angular 8下载文件

[HttpGet]
public IActionResult DownloadFile(string fileName)
{
    // 获取文件的完整路径
    string filePath = Path.Combine(Directory.GetCurrentDirectory(), "Files", fileName);

    // 检查文件是否存在
    if (!System.IO.File.Exists(filePath))
    {
        return NotFound();
    }

    // 读取文件的字节流
    byte[] fileBytes = System.IO.File.ReadAllBytes(filePath);

    // 返回文件的字节流
    return File(fileBytes, "application/octet-stream", fileName);
}

import { Component } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Component({
  selector: 'app-file-download',
  templateUrl: './file-download.component.html',
  styleUrls: ['./file-download.component.css']
})
export class FileDownloadComponent {
  constructor(private http: HttpClient) { }

  downloadFile(fileName: string) {
    const apiUrl = 'http://your-api-url/downloadFile?fileName=' + fileName;

    this.http.get(apiUrl, { responseType: 'blob' }).subscribe(response => {
      // 创建一个临时的URL对象
      const url = window.URL.createObjectURL(response);

      // 创建一个a标签并设置其属性
      const link = document.createElement('a');
      link.href = url;
      link.download = fileName;

      // 模拟点击下载
      link.click();

      // 释放临时的URL对象
      window.URL.revokeObjectURL(url);
    });
  }
}

<button (click)="downloadFile('example.pdf')">下载文件</button>