从数据库读取image字段到网页（BLOB型的）

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string strsqlconn; strsqlconn = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"].ToString(); SqlConnection sqlConn = new SqlConnection(strsqlconn); sqlConn.Open(); //查找符合条件的图片，取出来 string strsql; strsql = "select Image from Page_Image where Page_Id='"+strid+ "'"; SqlDataAdapter daImage = new SqlDataAdapter(strsql, sqlConn); //定义一个DataSet，并且进行填充数据 DataSet dsImage = new DataSet(); daImage.Fill(dsImage,"Page_Image"); //取消和数据库的关联，释放资源 sqlConn.Close(); daImage.Dispose(); sqlConn.Dispose(); //从数据库中读出图片流 byte[] btImage = (byte[])dsImage.Tables["Page_Image"].Rows[0]["Image"]; System.IO.MemoryStream ms = new MemoryStream(btImage); //create a bitmap object System.Drawing.Bitmap bmp = new Bitmap(ms); // create the actual thumbnail image System.Drawing.Image thumImage = bmp.GetThumbnailImage(1638,2338,new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback),IntPtr.Zero); // make a memory stream to work with the image bytes MemoryStream msimage = new MemoryStream(); // put the image into the memory stream thumImage.Save(msimage,System.Drawing.Imaging.ImageFormat.Jpeg); // make byte array the same size as the image byte[] imageContent = new Byte[msimage.Length]; // rewind the memory stream msimage.Position = 0; // load the byte array with the image msimage.Read(imageContent, 0, (int)msimage.Length); // return byte array to caller with image type Response.ContentType = "image/JPEG"; Response.BinaryWrite(imageContent); Response.End();