在.net 中怎么实现文件的下载

Question

在.net  中怎么实现文件的下载??

Answer 1

WebClient webClinent = new WebClient();
webClinent.DownloadFile(textBox1.Text,"下载文件.html");

Answer 2

给出文件地址不就ok拉?
比如http://localhost/web/1.doc
点击不就下载了?
数据库存路径就ok了

Answer 3

下载1. C#: 
/// <summary>
/// 文件下载
/// </summary>
/// <param name="FullFileName"></param>
private void FileDownload(string FullFileName)
{
FileInfo DownloadFile = new FileInfo(FullFileName); 
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();
}
2. vb.net
Public Sub WriteDLWindow(ByVal strFileName As String, ByVal page As System.Web.UI.Page)
        Try
           If File.Exists(page.MapPath(strFileName)) Then
               Dim TargetFile As FileInfo = New FileInfo(page.MapPath(strFileName))
               '清除缓冲区流中的所有内容输出.
               page.Response.Clear()
               '向输出流添加HTTP头 [指定下载/保存 对话框的文件名]
               page.Response.AppendHeader("Content-Disposition", "attachment; filename=" + page.Server.UrlEncode(TargetFile.Name))

'繁体格式
                'page.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(strFileName, System.Text.Encoding.UTF8))                '向输出流添加HTTP头 [指定文件的长度,这样下载文件就会显示正确的进度
                page.Response.AppendHeader("Content-Length", TargetFile.Length.ToString())
                '表明输出的HTTP为流[stream],因此客户端只能下载.
                page.Response.ContentType = "application/octet-stream"
                '发送文件流到客户端.
                page.Response.WriteFile(TargetFile.FullName)
                '停止执行当前页
                page.Response.End()
            End If
        Catch ex As Exception
            Throw ex
        End Try
    End Sub Set save file format: 
 Response.ContentType = "application/ms-excel";

Answer 4

我的连接到文件名 怎么他就把文件打开呢?
是txt 文件就打开了
其他的就报错!!

Answer 5

建一个.ashx(一般处理程序)
我这是个下载图片的程序,弹出下载对话框而不是在浏览器中显示,楼主参考一下
//download.ashx<%@ WebHandler Language="C#" Class="Download" %>using System;
using System.Web;/// <summary>
/// 下载图片用的Handler
/// </summary>
public class Download : IHttpHandler {
    
    public void ProcessRequest (HttpContext context) 
{
string path = context.Request.QueryString["image"];
string ext = System.IO.Path.GetExtension( path );
string filename = context.Request.QueryString["title"];

context.Response.ContentType = "image/jpeg";
context.Response.Charset = "utf-8";
context.Response.AppendHeader( "content-disposition", "attachment; filename=\"" + "文件名" + "\";" );
context.Response.TransmitFile( path );
    }
 
    public bool IsReusable {
        get {
            return false;
        }
    }}