下载代码说明 [英] downlaod code explanation

问题描述

任何人都可以解释这段代码

can anyone please explain this code

if (e.CommandName == "download")
            {
                string filename = e.CommandArgument.ToString();
                string path = MapPath("~/Docfiles/" + filename);
                byte[] bts = System.IO.File.ReadAllBytes(path);
                Response.Clear();
                Response.ClearHeaders();
                Response.AddHeader("Content-Type", "Application/octet-stream");
                Response.AddHeader("Content-Length", bts.Length.ToString());
                Response.AddHeader("Content-Disposition", "attachment; filename=" + filename);
                Response.BinaryWrite(bts);
                Response.Flush();
                Response.End();
            }

什么是命令参数，mappath，以及这是什么

Content-Type，Application / octet-stream

和

what is command argument, mappath, and also what is this
"Content-Type", "Application/octet-stream"
and also

Response.AddHeader("Content-Length", bts.Length.ToString());
                Response.AddHeader("Content-Disposition", "attachment; filename=" + filename);
                Response.BinaryWrite(bts);
                Response.Flush();

推荐答案

e.CommandName 是一个命令参数，与任何控件相关联，例如Button，ImageButton等。

此外，在编写代码时，您会找到这些控件的 CommandName 属性。所以它只是在点击控件时执行的消息（参数）。



关于内容 - 键入，Application / octet-stream，这是 MIME - 多用途Internet邮件扩展，是一个互联网标准，用于描述各种文件的内容。

您可以看到大量的扩展此处 [ ^ ]及其文件类型。



-KR

e.CommandName is a command argument, which is associated with any control i.e Button, ImageButton etc.
In addition, you would find CommandName property for these controls while writing the code. So it is nothing but the message(argument) that gets executed when control is clicked.

And about the "Content-Type", "Application/octet-stream" , this is the MIME - Multipurpose Internet Mail Extensions, is an internet standard that is used to describe the contents of various files.
You can see plenty of extension over here[^] with its file type.

-KR

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