asp.net实现文件下载功能

今天又需要写程序,是网站下载功能。以前曾经有写,是写在一个类别中,http://www.cnblogs.com/insus/articles/1411756.html  也录制过视频,http://www.cnblogs.com/insus/articles/1411761.html 不过还是有网友向Insus.NET索求代码。

今天Insus.NET只好帖出今天写的代码,仅供参考:

<asp:Button ID="ButtonDownload" runat="server" OnClick="ButtonButtonDownload_Click"
                        Text
="下载视频" />

 

xxx.aspx.cs:

View Code
 protected void ButtonButtonDownload_Click(object sender, EventArgs e)
    {
        HttpResponse _Response 
= HttpContext.Current.Response;
        
//取数据表
        DataRow objDataRow = objMedia.GetFileByPrimaryKey(id).Rows[0];
        
//取得文件目录与文件名。
        string f = objDataRow["Directory"].ToString() + objDataRow["NewFileName"].ToString();
        
//取得旧文件名
        string fn = objDataRow["OldFileName"].ToString();

        FileInfo fileInfo 
= new FileInfo(Server.MapPath (f));
        _Response.Clear();
        _Response.ClearHeaders();
        _Response.Buffer 
= false;
        _Response.ContentType 
= "application/octet-stream";
        _Response.AppendHeader(
"Content-Disposition""attachment;filename=" + HttpUtility.UrlEncode(fn, System.Text.Encoding.UTF8));
        _Response.AppendHeader(
"Content-Length", fileInfo.Length.ToString());
        _Response.WriteFile(fileInfo.FullName);
        _Response.Flush();
        _Response.End();
    }

 

 

posted @ 2011-04-02 14:40  Insus.NET  阅读(4934)  评论(3编辑  收藏