下载文件代码？？

[tongjingjingisfly]

我正在做一个网站，网站首页可以下载工具，可是我不会写下载的代码，各位英雄帮帮忙 啊，谁有下载的代码给我看看啊！！！！万分感谢！！

[纯唇Yu弄]

[Quote=引用 3 楼 porschev 的回复:]

C# code

protected void Button1_Click(object sender, EventArgs e)
{
//TransmitFile实现下载

/**/
/*
微软为Response对象提供了一个新的方法TransmitFile来解决使用Re……
[/Quote]
++

[andylei0145]

直接用<a href ="工具路径"></a>就可以了

[andylei0145]

<a href ="工具路径">工具名称</a>

[porschev]

    protected void Button1_Click(object sender, EventArgs e)
        {
            //TransmitFile实现下载

            /**/
            /*
             微软为Response对象提供了一个新的方法TransmitFile来解决使用Response.BinaryWrite
             下载超过400mb的文件时导致Aspnet_wp.exe进程回收而无法成功下载的问题。
             代码如下：
            */

            Response.ContentType = "application/x-zip-compressed";
            Response.AddHeader("Content-Disposition", "attachment;filename=keji.rar");
            string filename = Server.MapPath("keji.rar");
            Response.TransmitFile(filename);
            Response.Write("<script language=\"javascript\" type=\"text/javascript\">");
            Response.Write("alert(\"下载成功\");");
            Response.Write("window.location.href=\"C_SC.aspx\";");
            Response.Write("</script>");
        }

        protected void Button2_Click(object sender, EventArgs e)
        {

            //WriteFile实现下载
            string fileName = "ceshi.rar";//客户端保存的文件名
            string filePath = Server.MapPath("keji.rar");//路径

            FileInfo fileInfo = new FileInfo(filePath);
            Response.Clear();
            Response.ClearContent();
            Response.ClearHeaders();
            Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
            Response.AddHeader("Content-Length", fileInfo.Length.ToString());
            Response.AddHeader("Content-Transfer-Encoding", "binary");
            Response.ContentType = "application/octet-stream";
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
            Response.WriteFile(fileInfo.FullName);
            Response.Flush();
            Response.End();
        }

        protected void Button3_Click(object sender, EventArgs e)
        {
            //WriteFile分块下载

            string fileName = "GhostXP.iso";//客户端保存的文件名
            string filePath = Server.MapPath("GhostXP7.7.iso");//路径

            System.IO.FileInfo fileInfo = new System.IO.FileInfo(filePath);

            if (fileInfo.Exists == true)
            {
                const long ChunkSize = 409600;//100K 每次读取文件，只读取100Ｋ，这样可以缓解服务器的压力
                byte[] buffer = new byte[ChunkSize];

                Response.Clear();
                System.IO.FileStream iStream = System.IO.File.OpenRead(filePath);
                long dataLengthToRead = iStream.Length;//获取下载的文件总大小
                Response.ContentType = "application/octet-stream";
                Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName));
                while (dataLengthToRead > 0 && Response.IsClientConnected)
                {
                    int lengthRead = iStream.Read(buffer, 0, Convert.ToInt32(ChunkSize));//读取的大小
                    Response.OutputStream.Write(buffer, 0, lengthRead);
                    Response.Flush();
                    dataLengthToRead = dataLengthToRead - lengthRead;
                }
                Response.Close();
            }
        }

        //字符流方式下载文件
        protected void Button4_Click(object sender, EventArgs e)
        {
            string fileName = "ce2.rar";//客户端保存的文件名
            string filePath = Server.MapPath("keji.rar");//路径

            //以字符流的形式下载文件
            FileStream fs = new FileStream(filePath, FileMode.Open);
            byte[] bytes = new byte[(int)fs.Length];
            fs.Read(bytes, 0, bytes.Length);
            fs.Close();
            Response.ContentType = "application/octet-stream";
            //通知浏览器下载文件而不是打开
            Response.AddHeader("Content-Disposition", "attachment;   filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
            Response.BinaryWrite(bytes);
            Response.Flush();
            Response.End();
        }

[MSDNXGH]

<a href ="文件地址">文件名</a>这个很简单，但有一个问题，如果用户单击的话。。。如是是MP3，WMV，execl,word,等微软系统文件，都行调用相关软件，打开，而不是提示保存地本地电脑，如果是RAR后缀名，或者其它后缀名，就行，楼主，你试试看看吧。。

[sswwyy]

oldName=文件名称;
filePath = Server.MapPath("路径/") + oldName;
DownFile(filePath, oldName);

public void DownFile(string filename, string OldName)
{
System.IO.FileInfo file = new System.IO.FileInfo(filename);
Response.Clear();
Response.AddHeader("Content-Disposition", "attachment; filename=\" " + HttpUtility.UrlEncode(OldName, System.Text.Encoding.UTF8) + "\" ");
Response.AddHeader("Content-Length", file.Length.ToString());
Response.ContentType = "application/octet-stream";
Response.WriteFile(file.FullName);
Response.End();
}

[gaven2060]

1楼正确 <a href='文件路径'></a>

[wuyq11]

string fileName = "";//客户端保存的文件名
string filePath = Server.MapPath("");//路径

FileInfo fileInfo = new FileInfo(filePath);
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
Response.AddHeader("Content-Length", fileInfo.Length.ToString());
Response.AddHeader("Content-Transfer-Encoding", "binary");
Response.ContentType = "application/octet-stream";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
Response.WriteFile(fileInfo.FullName);
Response.Flush();
Response.End();
下载 四种方法