asp.net文件下载

来源：互联网发布：串行控制端口编辑：程序博客网时间：2024/05/16 03:14

.aspx代码如下：

<%@ Page Title="" Language="C#" MasterPageFile="~/SAMPLE_CODE/AMST_SAMPLE.master" AutoEventWireup="true" CodeFile="S6_downloadLink.aspx.cs" Inherits="SAMPLE_CODE_S8_downloadLink" %><asp:Content ID="Content1" ContentPlaceHolderID="CPH_HEAD" Runat="Server"></asp:Content><asp:Content ID="Content2" ContentPlaceHolderID="CPH_MEMO" Runat="Server">    <ul>        <li>普通的超链接 <a>有时无法满足下载的需求,而是用浏览器直接打开了文件</li>    </ul></asp:Content><asp:Content ID="Content3" ContentPlaceHolderID="CPH_MAIN" Runat="Server">    <p>普通超链接链接一个图片文件[直接打开]:        <a href="../imgs/img1.jpg">           <a href="../imgs/img1.jpg"/>    </a></p>    <p>普通超链接链接一个rar文件[下载]:        <a href="../imgs/temp.rar">             <a href="../imgs/temp.rar"/>        </a>    </p>    <p>普通超链接指向一个wav文件[插件或运行环境不同而决定是打开还是下载]:    <a href="../imgs/music1.wav">         <a href="../imgs/music1.wav"/>    </a></p>    <p>带有[download]属性的超链接-> 图片         <a href="../imgs/img1.jpg" download="myImg.jpg">图片下载</a>    </p>    <p style="font-size:16px; color:Red;">完全不暴露目标文件的下载LinkButton        <asp:LinkButton ID="LinkButton1" runat="server" onclick="LinkButton1_Click">图片文件下载</asp:LinkButton>    </p></asp:Content>

.aspx.cs代码如下：

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;public partial class SAMPLE_CODE_S8_downloadLink : System.Web.UI.Page{    protected void Page_Load(object sender, EventArgs e)    {    }    protected void LinkButton1_Click(object sender, EventArgs e)    {        string fileName = "tempImg.jpg";        string filePath = Server.MapPath("~/imgs/img3.jpg");        Response.Clear();        Response.Buffer = true;        Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);        Response.ContentType = "application/unknow";        Response.TransmitFile(filePath);        Response.End();    }}

运行效果如下：

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