c# 点按钮弹出下载框

Question

我要在页面上有个按钮，一点击，会弹出下载对话框，文件在服务器上，要下载到客户端。最好有代码。谢谢。

Answer 1

 protected void Button1_Click(object sender, EventArgs e)
    {
        Response.AppendHeader("Content-Disposition", "attachment;filename=File.doc");
        //输出内容的编码方式
        Response.ContentEncoding = Encoding.UTF7;        FileStream fs = new FileStream("d:/api.doc",FileMode.Open);        BinaryReader br = new BinaryReader(fs);        byte[] docbyte=br.ReadBytes(1000);        while (docbyte.Length > 0)
        {
            Response.BinaryWrite(docbyte);
            
            docbyte = br.ReadBytes(1000);
        }
        Response.Flush();
        Response.Close();
        Response.End();        
    }

Answer 2

 /// <summary>
    /// 從WEB頁面文件下載
    /// </summary>
    /// <param name="strFile">要下載的文件的絕對路徑</param>
    public static void DownloadFile(string strFile)
    {
        HttpContext.Current.Response.Clear();
        HttpContext.Current.Response.ContentType = "application/octet-stream";
        HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=\"" + HttpUtility.UrlEncode(Path.GetFileName(strFile).Trim()) + "\"");
        HttpContext.Current.Response.Flush();
        HttpContext.Current.Response.WriteFile(strFile);
        HttpContext.Current.Response.End();
    }

Answer 3

<input type="button" value="Try it." onclick="btn_click();">
<script>
function btn_click()
{
     window.open("../FileDownload.html?FileName=FuckJP.mp3");
}
</script>

Answer 4

有空看看,http://www.cnblogs.com/jiangshaofen/archive/2007/04/16/715227.html