如何在Asp.Net中使用Common Response.Contentype从数据库下载任何文件？ [英] How Do I Download Any File From Database With Common Response.Contentype In Asp.Net?

问题描述

我正在从数据库下载文件，执行文件扩展名并使用if-else和不同的response.contenttype ....根据扩展名检查扩​​展名。

这里是我的代码：

I am downloading file from the database by carrying out the extension of the file and checking the extension with if-else and with different response.contenttype....according to extension.
here is my code:

if (ext == ".pdf")
           {
               Response.ContentType = "application/pdf";
           }

           else if (ext == ".doc" || ext == ".rtf" || ext == ".docx")
           {
               Response.ContentType = "Application/msword";
           }

           else if (ext == ".txt")
           {
               Response.ContentType = "text/Plain";
           }

           else if (ext == ".rar")
           {
               Response.ContentType = "Application/x-rar-compressed";
           }
           else if (ext == ".jpeg" || ext==".jpg")
           {
               Response.ContentType = "image/jpeg";
           }
           else
           {
               Response.ContentType = "Application/octetstream";
           }

           Response.AddHeader("Content-disposition", "attachment; filename=" + filename);
           Response.BinaryWrite(byteimg);
           Response.Flush();
           Response.End();
       }

因此，不是每次下载时根据扩展名声明response.contenttype，想要常见的response.contentype来排除所有这些/ .....请帮助..

谢谢.. :)

So, instead of declaring response.contenttype according to extension each and every time at the time of downloading, i want the common response.contentype to exclude all these one's/.....please help..
Thanks..:)

推荐答案

您想要改变整个互联网的运作方式。您可以压缩文件，从而将类型设置为zip，但是，您需要告诉浏览器内容类型是什么，因此它知道如何处理它。

You want to change how the entire internet works. You can zip the files, and thus set the type to be a zip, but otherwise, you need to tell the browser what the content type is, so it knows what to do with it.

有一般的八位字节MIME类型，但它们在你的情况下几乎没用。



你觉得必须有比使用if更好的方法吗？ / else构造？您可以将扩展和MIME类型放在字典中，只需查找要发送给客户端的扩展，以使其成为适当的MIME类型。

There are generic "octet" MIME types, but they are hardly useful in your case.

Did it dawn on you that there must be a better way than using if/else constructs? You could just put the extensions and MIME types in a Dictionary and just do a lookup of the extension you're sending to the client to get it's an appropriate MIME type.

这篇关于如何在Asp.Net中使用Common Response.Contentype从数据库下载任何文件？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！