how to download file from mdf database in c#

Question

im currently working on project doing file management, and i just finish the code for upload file into my database(.mdf) table, however i have no idea how to download the file back to my folder(or anywhere else). I see people do download from ASP.Net, OR web sql database, but i wish if someone could tell me how to download it from a mdf database.

private void find_Click(object sender, EventArgs e)
{
  OpenFileDialog dlg = new OpenFileDialog();
  if (dlg.ShowDialog() == DialogResult.OK)
  {
   string Path = dlg.FileName.ToString();
   PathBox.Text = Path;
   PicBox.location = Path;
  }
}

private void save_Click(object sender, eventargs e) 
{ 
  byte[] Doc = null;
  Filestream fs = new FileStream(this.PathBox.Text, FileMode.Open, FileAccess.Read);
  BinaryReader br = new BinaryReader(fs);
  Doc = br.ReadBytes((int)fs.Length);

  string DS = "datasource = localDB ......";
  string Insertcmd = "insert into ......";
  MySqlConnection conn = new MySqlConnection(DS);
  MySqlCommand cmd = new MySqlCommand(Insertcmd, conn);
  MySqlDataReader msdr;

  try
  {
      conn.Open();
      cmd.Parameter.Add(new MySqlParameter("@Document", Doc));

      msdr = cmd.ExecuteReader();
      MessageBox.Show("file saved");
      While (msdr.Read())
      {
      }
   catch (Exception ex)
    {
    }
}

could someone give me a code that is able to download from .mdf database? or even any hint will be very helpful

thanks

Answer 1

HI It seems that you are saving the file in a binary format (BLOB ) object ? So when you want to show the image after getting from Database you could read it using a memory stream and show it. or maybe use context.Response.BinaryWrite() to output the image.

http://csharpdotnetfreak.blogspot.com/2009/07/display-images-gridview-from-database.html might be helpful.