Question

我正在从S3文件返回文件流。由于该流不可搜索，因此将其放入MemoryStream中以获取长度。该文件确实下载到浏览器。当我打开文件时，我看到了正确的csv数据，但在数据后也有页面HTML。不确定我缺少什么。

var streamResult = FileStream(bucket, fileName);

if (streamResult.Stream != null)
{
    //using (StreamReader reader = new StreamReader(streamResult.Stream))
    //using (Stream stream = streamResult.Stream)
    using (var ms = new MemoryStream())
    {
        streamResult.Stream.CopyTo(ms);
        ms.Position = 0;

        //byte[] bytes = System.Text.Encoding.UTF8.GetBytes(ms);

        HttpContext context = HttpContext.Current;
        context.Response.AddHeader("Content-Disposition", "attachment; filename=" + returnFileName);
        context.Response.AddHeader("Content-Type", "application/vnd.ms-excel");
        context.Response.AddHeader("Content-Length", ms.Length.ToString());
        //context.Response.ContentType = "application/octet-stream";
        //context.Response.ClearContent();
        ms.WriteTo(context.Response.OutputStream);
        //context.Response.OutputStream.Write(bytes, 0, bytes.Length);
    }
}

Answer 1

更新：只需在context.Response.Flush();之后添加ms.WriteTo(context.Response.OutputStream);

在我的Excel文件Response.OutputStream中获取html的webforms

1 个答案: