How Do I Ensure Good Quality Images

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C#

C#4.0

good day guys and girls, i insert images into mysql database using the following blocks of code

protected void ad3upload_Click(object sender, EventArgs e)
        {
            if (FileUpload6.HasFile)
            {
                string fileName = FileUpload6.FileName;
                string path = fileName;
                TextBox13.Text = fileName;
                FileUpload6.SaveAs(Server.MapPath(path));
                pass3img.ImageUrl = path;

                //this gets admin1passport
                Stream fs3 = FileUpload6.PostedFile.InputStream;
                BinaryReader br3 = new BinaryReader(fs3);
                Byte[] bytes3 = br3.ReadBytes((Int32)fs3.Length);

                try
                {
                    MySqlConnection conn = new MySqlConnection(connection);
                    MySqlCommand ins = new MySqlCommand("update tables.admintable set Passport = @img where Name = '" + newname.Text + "'", conn);
                    MySqlDataReader read;
                    conn.Open();
                    ins.Parameters.Add("@img", MySqlDbType.Binary).Value = bytes3;
                    read = ins.ExecuteReader();
                    conn.Close();
                    Label84.ForeColor = System.Drawing.Color.Green;
                    Label84.Text = "Successful Upload";
                }
                catch (MySqlException)
                {
                    Label84.ForeColor = System.Drawing.Color.Red;
                    Label84.Text = "Failed Upload, Please Try Agin";
                }
                catch (Exception)
                {
                    Label84.ForeColor = System.Drawing.Color.Red;
                    Label84.Text = "Failed Upload, Please Try Agin";
                }
            }
        }
it succesfully uploads buy when i recall the image from the database through these set of codes
protected void adminListBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            try
            {
                MySqlConnection conn = new MySqlConnection(connection);
                MySqlCommand select = new MySqlCommand("select Passport from tables.admintable where Name = '" + Label33.Text + "'", conn);
                MySqlDataReader read;
                conn.Open();
                read = select.ExecuteReader();
                while (read.Read())
                {
                    byte[] passportImage1 = (byte[])(read["Passport"]);
                    if (adminListBox.SelectedIndex.Equals(0))
                    {
                        if (passportImage1 == null)
                        {
                            adminImage.ImageUrl = null;
                        }
                        else
                        {
                            MemoryStream ms = new MemoryStream(passportImage1); // this holds the image gotten from the database
                            string base64string = Convert.ToBase64String(passportImage1, 0, passportImage1.Length);
                            adminImage.ImageUrl = "data:image/png;base64," + base64string;
                        }
                    }
                }
                read.Close();
                conn.Close();
            catch (MySqlException)
            {
                Label84.ForeColor = System.Drawing.Color.Red;
                Label84.Text = "Failed Upload, Please Try Agin";
            }
            catch (Exception)
            {
                Label84.ForeColor = System.Drawing.Color.Red;
                Label84.Text = "Failed Upload, Please Try Agin";
            }

            }
        }

this gets the image quite alright but it looks like its a cracked image on display, like its corrupted.
i want it to show clearly. please what am i missing?