提示 参数无效

Question

从数据库中读取图片放入图片控件
 SqlConnection conn = Class1.str();
            conn.Open();
            SqlDataAdapter comm = new SqlDataAdapter("select Uzhaopian from Users where Uname='" + dataGridView1.SelectedCells[1].Value.ToString() + "'", conn);
            DataSet ds = new DataSet();
            comm.Fill(ds);
            //SqlDataReader sdr = comm.ExecuteReader();
            //sdr.Read();
            //byte[] bImg = (byte[])sdr["Uzhaopian"];            MemoryStream stream = new MemoryStream((byte[])ds.Tables[0].Rows[0][0]);            pictureBox1.Image = Image.FromStream(stream);

Answer 1

pictureBox1.Image = Image.FromStream(stream);  stream参数无效

Answer 2

pictureBox1.Image = Image.FromStream((Stream)stream); stream参数无效 

Answer 3

 using(MemoryStream ms =new MemoryStream(bytes))
 {
    Image photo=null;
    ms.Write(bytes,0,bytes.length);
    photo =Image.FromStream(ms); 
  }