如何用asp.net下载音乐

Question

I have an asp.net webform application. I want to have a button for downloading musics, so I write below code block :

protected void Button1_Click(object sender, EventArgs e)
{
    string id_new;
    id_new = Session["selectedmusicID"].ToString();
    DataTable dt2 = new DataTable();
    dt2 = blm.selectMusic("sel_music", Convert.ToInt32(id_new));
    string test = dt2.Rows[0][9].ToString();
    Response.ContentType = "application/mp3";
    Response.AddHeader("Content-Disposition", dt2.Rows[0][9].ToString());
    Response.TransmitFile(Server.MapPath( dt2.Rows[0][9].ToString()));
    Response.End();
}

When I run this code and click on button it downloads the music.aspx page not mp3 file.I don't know what is my mistake. Anyone can help me?

Answer 1

Finally I've solved my problem, as you can see in the code below... first I create a column named MusicByte to my music table in database.I stored the data of every music by file uploading in this column...

string id_new;
id_new = Session["selectedmusicID"].ToString();
DataTable dt2 = new DataTable();
dt2 = blm.selectMusic("sel_music", Convert.ToInt32(id_new));
string test = dt2.Rows[0][9].ToString();
string filename = test.Substring(9).Replace(" " , "").Replace(".mp3" , ".MP3");
byte[] buffer = (byte[])(dt2.Rows[0][10]);
Response.ContentType = "audio/mpeg";
Response.AddHeader("Content-Disposition", "Attachment;filename=" + filename);
byte[] datablock = new byte[0x1000];
long filesize;
int bytesread;
long totalsbytesread = 0;
using (Stream st = new MemoryStream(buffer))
        {
            filesize = st.Length;
            while (totalsbytesread < filesize)
            {
                if (Response.IsClientConnected)
                {
                    bytesread = st.Read(datablock, 0, datablock.Length);
                    Response.OutputStream.Write(datablock, 0, bytesread);
                    Response.Flush();
                    totalsbytesread += bytesread;
                }
            }
        }
        Response.End();

deleting spaces in filename and replice the .mp3 to .MP3 was usefull.Also this video in you tube helps me : Upload and download files to/from a SQL Server database