我已经将图像路径存储到NewImage（varchar）列中，当我想显示来自Images文件夹的图像时，它会在图片框上显示一个带红十字的白色框。

这是我试图从我的图像目录检索图像的代码，它不工作

private void Quiz_Load(object sender, EventArgs e)
        {

            if (pictureBox1.Image != null)
            {
                pictureBox1.Image.Dispose();
                pictureBox1.Image = null;       
            }

            string constr = ConfigurationManager.ConnectionStrings["conString"].ConnectionString;
           
            using (SqlConnection conn = new SqlConnection(constr))
            {
                using (SqlCommand cmd = new SqlCommand("SELECT NewImage FROM tblQuestion WHERE QuestionId =1", conn))
                {
                    cmd.CommandType = CommandType.Text;
                    using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
                    {
                        using (DataTable dt = new DataTable())
                        {
                            conn.Open();
                            sda.Fill(dt);
                            
                            pictureBox1.ImageLocation = (@"\Images");
                           
                           
                            pictureBox1.SizeMode = PictureBoxSizeMode.CenterImage;
                            conn.Close();
                        }

                    }

                }
                
            }