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            string entityConnectionString = ConfigurationManager.ConnectionStrings["EntitiesPation"].ConnectionString;

            var ecsb = new EntityConnectionStringBuilder(entityConnectionString);
            var scsb = new SqlConnectionStringBuilder(ecsb.ProviderConnectionString);

            //scsb.DataSource = scsb.DataSource.Replace('1', '2');

            ecsb.ProviderConnectionString = scsb.ToString();

            
            using (EntitiesPation ent = new EntitiesPation(ecsb.ToString()))
   
            {
                byte[] by = ent.pation.First().image;


                Stream stream = new MemoryStream(by);
                System.Drawing.Bitmap img = (System.Drawing.Bitmap)System.Drawing.Bitmap.FromStream(stream, false); //转换成Bitmap

                pictureBox1.Image = img;
            }