我可以显示PDF,但不允许在网站中链接到它吗？

Question

我有一个网站,其中有一堆预先创建并存放在网络服务器上的PDF.

我不想让用户只输入一个URL并获取PDF文件(即http://MySite/MyPDFFolder/MyPDF.pdf)

我想只允许在加载它们并显示它们时查看它们.

我之前做过类似的事.我使用PDFSharp在内存中创建PDF,然后将其加载到这样的页面:

protected void Page_Load(object sender, EventArgs e)
{
    try 
    {
        MemoryStream streamDoc = BarcodeReport.GetPDFReport(ID, false);
        // Set the ContentType to pdf, add a header for the length
        // and write the contents of the memorystream to the response
        Response.ContentType = "application/pdf";
        Response.AddHeader("content-length", Convert.ToString(streamDoc.Length));
        Response.BinaryWrite(streamDoc.ToArray());
        //End the response
        Response.End();
        streamDoc.Close();
    }
    catch (NullReferenceException)
    {
        Communication.Logout();
    }


} 

我试图使用此代码从文件中读取,但无法弄清楚如何让MemoryStream读取文件.

我还需要一种方法来说"/ MyPDFFolder"路径是不可浏览的.

谢谢你的任何建议

Answer 1

要将PDF文件从磁盘加载到缓冲区:

byte [] buffer;
using(FileStream fileStream = new FileStream(Filename, FileMode.Open))
{
    using (BinaryReader reader = new BinaryReader(fileStream))
    {
         buffer = reader.ReadBytes((int)reader.BaseStream.Length);
    }
}

然后你可以这样创建MemoryStream:

using (MemoryStream msReader = new MemoryStream(buffer, false))
{
     // your code here.
}

但是如果你已经将数据存储在内存中,则不需要MemoryStream.而是这样做:

    Response.ContentType = "application/pdf";
    Response.AddHeader("Content-Length", buffer.Length.ToString());
    Response.BinaryWrite(buffer);
    //End the response
    Response.End();
    streamDoc.Close();