Asp.Net–下載檔案

實現方式1:

    protected void DownLoad_Click(object sender, EventArgs e)    {        //擷取要下載的檔案        string filename = Server.MapPath("~/upload/電腦科學與技術.rar");       FileInfo f = new FileInfo(filename);        //設定檔案頭        Response.ContentType = "application/zip";        //對檔案名稱進行編碼處理,並設定儲存時的預設檔案名稱        Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(f.Name, System.Text.Encoding.UTF8));        //輸出檔案        Response.TransmitFile(filename);            }

效果:

實現方式2:

    protected void DownLoad_Click(object sender, EventArgs e)    {        //擷取要下載的檔案         string file = Server.MapPath("~/upload/DesignPattern.rar");        FileInfo f = new FileInfo(file);        //清空緩衝區內容         Response.Clear();        //設定檔案頭         Response.AddHeader("Content-Disposition", "attachment;filename="+HttpUtility.UrlDecode(f.Name,System.Text.Encoding.UTF8));        Response.AddHeader("Content-Length", f.Length.ToString());        Response.AddHeader("Content-Transfer-Encoding", "binary");        Response.ContentType = "application/zip";        Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");        Response.WriteFile(f.FullName);        Response.End();    }

下載中文名檔案時存在問題.

效果:

實現方式3:

    protected void DownLoad_Click(object sender, EventArgs e)    {        //擷取要下載的檔案,並將資料讀入數組         string filepath = Server.MapPath("~/upload/DesignPattern.rar");        FileInfo fi = new FileInfo(filepath);        FileStream fs = new FileStream(filepath, FileMode.Open);        int filelength = (int)fs.Length;        byte[] bt = new byte[filelength];        fs.Read(bt, 0, filelength);        fs.Close();        //設定檔案頭及儲存時的檔案名稱         Response.ContentType = "application/zip";        Response.AddHeader("Content-Disposition","attachment;filename="+HttpUtility.UrlDecode(fi.Name,System.Text.Encoding.UTF8));        Response.AddHeader("Content-Length", filelength.ToString());        //輸出檔案         Response.BinaryWrite(bt);        Response.Flush();        Response.End();    }

下載中文名檔案時存在問題.

效果:

實現方式4:

    protected void DownLoad_Click(object sender, EventArgs e)    {        string filepath = Server.MapPath("~/upload/DesignPattern.rar");        FileStream fs = new FileStream(filepath, FileMode.Open);        int filelength = (int)fs.Length;        byte[] b = new byte[filelength];        fs.Read(b, 0, filelength);        fs.Close();        Response.ContentType = "application/zip";        Response.AddHeader("Content-Disposition", "attachment;filename=1.rar");        Response.AddHeader("Content-Length", filelength.ToString());        Response.OutputStream.Write(b, 0, filelength);        Response.OutputStream.Close();        Response.Flush();        Response.Close();    }

實現方式5:

    protected void DownLoad_Click(object sender, EventArgs e)    {        //鑾峰彇瑕佷笅杞界殑鏂囦歡,騫跺皢鏁版嵁璿誨靉鏁扮粍        string filepath = Server.MapPath("~/upload/aspnetmvc-stepbystep.rar");        FileStream fs = new FileStream(filepath, FileMode.Open, FileAccess.Read, FileShare.Read);        long filelength = fs.Length;        int readsize = 102400;        byte[] b = new byte[readsize];          Response.ContentType = "application/octet-stream";        Response.AddHeader("Content-Disposition", "attachment;filename=1.rar");        Response.AddHeader("Content-Length", filelength.ToString());        while (filelength > 0 && Response.IsClientConnected)        {            int receive = fs.Read(b, 0, readsize);            Response.OutputStream.Write(b, 0, receive);            Response.Flush();            b = new byte[readsize];            filelength = filelength - receive;        }        fs.Close();        Response.OutputStream.Close();        Response.Close();    }

注意:

Response.AppendHeader("content-disposition", "attachment;filename=" + filename);//附件下載Response.AppendHeader("content-disposition", "online;filename=" + filename);//線上開啟