文件下载处理-优快云博客

本文介绍了一种使用 ASP.NET 处理文件下载的方法，包括如何构造文件路径、设置响应头以允许用户下载文件，以及如何直接打开文件等内容。通过具体的代码示例展示了整个过程。

一、下载文件

string str = Request.QueryString["D_Url"].ToString(); //虚拟文件路径

string str1 = str.Remove(0, str.LastIndexOf("/") + 1);

string filePath=“~/UserFiles/”;

filePath=System.IO.Path.Combine(filePath,str1); //将文件的物理路径和文件名称合到一块组合成完整的完整文件路径

Response.Clear();
                Response.ContentType = "application/octet-stream";
                Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Server.MapPath(filePath)));
                Response.WriteFile(filePath);
                Response.End();

打开文件: string str = Request.QueryString["D_Url"].ToString();

string str1 = str.Remove(0, str.LastIndexOf("/") + 1);

           //string str2 = Server.MapPath("UserFiles//") + str1;   //打开文件
                //FileInfo DownloadFile = new FileInfo(str2);
                //Response.Clear();
                //Response.ClearHeaders();
                //Response.Buffer = false;
                //Response.ContentType = "application/octet-stream ";
                //Response.AppendHeader("Content-Disposition ", "attachment;filename= " + HttpUtility.UrlEncode(DownloadFile.FullName, System.Text.Encoding.UTF8));
                //Response.AppendHeader("Content-Length ", DownloadFile.Length.ToString());
                //Response.WriteFile(DownloadFile.FullName);
                //Response.Flush();
                //Response.End();