Unable to cast object of type 'system.byte ' to type 'system.iconvertible'

Question

I always gets the error

unable to cast object of type 'system.byte ' to type 'system.iconvertible"

with my code of retrieving image form DB to a picturebox through a 'SelectedIndexChanged' event of a listview.

Here is my code:

foreach (ListViewItem LVI in lvwInventory.SelectedItems)
{
    ////CONNECTION STRING TO THE DATABASE (USED FOR SAVING/UPLOADING IMAGE)
    //System.Data.OleDb.OleDbConnection con = new System.Data.OleDb.OleDbConnection("Provider=microsoft.jet.oledb.4.0; data source=..\\dbMyDVDOrganizer.mdb");
    con.Open();
    //OLEDB COMMAND FOR RETRIEVING IMAGE FROM THE DATABASE
    System.Data.OleDb.OleDbCommand cmd = new System.Data.OleDb.OleDbCommand("SELECT DVDImage FROM tblDVDInventory WHERE ItemCode='" + lvwInventory.SelectedItems[0].Text + "'");
    cmd.Connection = con;
    cmd.CommandType = CommandType.Text;
    System.Data.OleDb.OleDbDataAdapter da = new System.Data.OleDb.OleDbDataAdapter(cmd);
    DataSet ds = new DataSet();
    da.Fill(ds);
    Byte bits = Convert.ToByte(ds.Tables[0].Rows[0][0]);
    MemoryStream memoryBits = new MemoryStream(bits);
    Bitmap bitmap = new Bitmap(memoryBits);
    //BITMAP HAS THE IMAGE NOW.
    pctImage.Image = bitmap;
}

Where did I make a mistake?

Answer 1

Just a wild guess: I'd image DVDImage contains more than just a Byte ... maybe a byte array ( Byte[] )? Replace

Byte bits = Convert.ToByte(ds.Tables[0].Rows[0][0]);

with

Byte[] bits = ds.Tables[0].Rows[0].Field<Byte[]>("DVDImage");

(or

Byte[] bits = (byte[])(ds.Tables[0].Rows[0][0]);

if you are using an old version of the .NET framework).

Answer 2

Try replacing

Byte bits = Convert.ToByte(ds.Tables[0].Rows[0][0]);

with

Byte[] bits = (Byte[])ds.Tables[0].Rows[0][0];