Asp.net MVC API前后端分离 下载文件乱码问题

c# 代码

public HttpResponseMessage Export(){
	HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
    {
          response.Content = new System.Net.Http.ByteArrayContent(ms.ToArray());
      };

      response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/vnd.ms-excel");
      response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
      {
          FileName = Name + ".xls",
          DispositionType = "UTF-8"
      };
      return response;
}

前端代码(react + axios)

export function Post (url,params){
    return axios.post(url,params,{
        responseType:'arraybuffer'
    }).then(response =>  {
        return response;
    }).catch(error => {
        console.error(error)
    })
}
Post(url,params).then(res => {
	 const url = window.URL.createObjectURL(new Blob([res.data],
	                   // 设置该文件的mime类型,这里对应的mime类型对应为.xlsx格式                                                   
	                   {type: 'application/vnd.ms-excel;charset=utf-8'}));
    const link = document.createElement('a');
    link.href = url;
        // 从header中获取服务端命名的文件名
    let fileName = decodeURI(res.headers['content-disposition'].substring(res.headers['content-disposition'].indexOf("=")));
        fileName = fileName.substring(0,fileName.length-1);
    link.setAttribute('download', fileName);
    document.body.appendChild(link);
    link.click();
})

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