使用webapi和angularjs下载excel文件

[HttpGet]
public HttpResponseMessage DownloadExcelFile()
{
    // 生成Excel文件
    var excelData = GenerateExcelData();

    // 将Excel数据流作为响应返回
    HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
    response.Content = new ByteArrayContent(excelData);
    response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
    response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
    response.Content.Headers.ContentDisposition.FileName = "filename.xlsx";

    return response;
}

$scope.downloadExcelFile = function() {
    $http.get('/api/downloadExcelFile', { responseType: 'arraybuffer' })
        .then(function(response) {
            var blob = new Blob([response.data], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' });
            var url = URL.createObjectURL(blob);
            var a = document.createElement('a');
            a.href = url;
            a.download = 'filename.xlsx';
            a.style.display = 'none';
            document.body.appendChild(a);
            a.click();
            document.body.removeChild(a);
        });
};