在带有asp.net web api的angular中使用http.get下载.xlsx文件时出错

public void ConfigureServices(IServiceCollection services)
{
    services.AddCors(options =>
    {
        options.AddPolicy("AllowAllOrigins",
            builder =>
            {
                builder.AllowAnyOrigin()
                       .AllowAnyMethod()
                       .AllowAnyHeader();
            });
    });
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    app.UseCors("AllowAllOrigins");
    // 其他配置代码
}

[HttpGet]
public IActionResult DownloadFile()
{
    // 从服务器获取文件路径和名称
    string filePath = "path/to/file.xlsx";
    string fileName = "file.xlsx";

    // 返回文件
    return File(filePath, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", fileName);
}

import { HttpClient } from '@angular/common/http';
import { saveAs } from 'file-saver';

constructor(private http: HttpClient) {}

downloadFile() {
  const url = 'http://example.com/api/download';
  this.http.get(url, { responseType: 'blob' }).subscribe(response => {
    const blob = new Blob([response], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' });
    saveAs(blob, 'file.xlsx');
  });
}