读取二进制文件并使用Response.BinaryWrite()

Question

我有一个应用程序,需要从文件系统中读取PDF文件,然后将其写出给用户.PDF是183KB,似乎完美无缺.当我使用底部的代码时,浏览器获取一个224KB的文件,我从Acrobat Reader收到一条消息,说文件已损坏且无法修复.

这是我的代码(我也尝试过使用File.ReadAllBytes(),但我得到了相同的东西):

using (FileStream fs = File.OpenRead(path))
{
    int length = (int)fs.Length;
    byte[] buffer;

    using (BinaryReader br = new BinaryReader(fs))
    {
        buffer = br.ReadBytes(length);
    }

    Response.Clear();
    Response.Buffer = true;
    Response.AddHeader("content-disposition", String.Format("attachment;filename={0}", Path.GetFileName(path)));
    Response.ContentType = "application/" + Path.GetExtension(path).Substring(1);
    Response.BinaryWrite(buffer);
}

Answer 1

尝试添加

到Response.End();

在调用Response.BinaryWrite()之后.

您可能无意中在Response.BinaryWrite之后发回其他内容,这可能会混淆浏览器.Response.End将确保浏览器只获得您真正想要的内容.

Answer 2

        Response.BinaryWrite(bytes);
        Response.Flush();
        Response.Close();
        Response.End();

这对我们有用.我们从SQL Reporting Services创建PDF.

Answer 3

我们已经使用了很多成功.WriteFile为您下载和Flush/End结束,将其全部发送给客户端.

            //Use these headers to display a saves as / download
            //Response.ContentType = "application/octet-stream";
            //Response.AddHeader("Content-Disposition", String.Format("attachment; filename={0}.pdf", Path.GetFileName(Path)));

            Response.ContentType = "application/pdf";
            Response.AddHeader("Content-Disposition", String.Format("inline; filename={0}.pdf", Path.GetFileName(Path)));

            Response.WriteFile(path);
            Response.Flush();
            Response.End();

Answer 4

由于您是直接从文件系统发送文件而没有中间处理,为什么不使用Response.TransmitFile呢？

Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition",
    "attachment; filename=\"" + Path.GetFileName(path) + "\"");
Response.TransmitFile(path);
Response.End();

(我怀疑您的问题是由于丢失造成的Response.End,这意味着您将页面的其余内容发送到PDF数据中.)

Answer 5

仅供将来参考，如本博客文章所述：http : //blogs.msdn.com/b/aspnetue/archive/2010/05/25/response-end-response-close-and-how-customer-feedback- help-us-improve-msdn-documentation.aspx

这是不推荐打电话Response.Close()或Response.End()-改用CompleteRequest()。

你的代码看起来有点像这样：

    byte[] bytes = {};

    bytes = GetBytesFromDB();  // I use a similar way to get pdf data from my DB

    Response.Clear();
    Response.ClearHeaders();
    Response.Buffer = true;
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    Response.ContentType = "application/pdf";
    Response.AppendHeader("Content-Disposition", "attachment; filename=" + anhangTitel);
    Response.AppendHeader("Content-Length", bytes.Length.ToString());
    this.Context.ApplicationInstance.CompleteRequest();