private void btnObtener_Click(object sender, EventArgs e)
{
if (cn.State == ConnectionState.Closed)
{
cn.Open();
SqlCommand cmd = new SqlCommand("select imagen from documento where iddoc = 2", cn);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet("imagen");
da.Fill(ds,"imagen");
byte[] imagen1 = new byte[0];
DataRow dr = ds.Tables["imagen"].Rows[0];
imagen1 = (byte[])dr["imagen"];
MemoryStream ms = new MemoryStream(imagen1);
pictureBox1.Image = Image.FromStream(ms);
cn.Close();
}
}