asp.net(C#)利用QRCode生成二維碼(續)-在二維碼圖片中心加Logo或圖像

<%@ WebHandler Language= "C#" Class= "GetQRCode" %>

 

using System;

using System.Web;

 

using ThoughtWorks.QRCode.Codec;

using ThoughtWorks.QRCode.Codec.Data;

using ThoughtWorks.QRCode.Codec.Util;

using System.IO;

using System.Text;

using System.Drawing;

using System.Drawing.Drawing2D;

 

public class GetQRCode : IHttpHandler

{

 

     public void ProcessRequest(HttpContext context)

     {

 

         String data = context.Request[ "CodeText" ];

         if (!string.IsNullOrEmpty(data))

         {

             QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();

             qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;

             qrCodeEncoder.QRCodeScale = 4 ;

             qrCodeEncoder.QRCodeVersion = 8 ;

             qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;

             System.Drawing.Image image = qrCodeEncoder.Encode(data);

             System.IO.MemoryStream MStream = new System.IO.MemoryStream();

             image.Save(MStream, System.Drawing.Imaging.ImageFormat.Png);

 

             System.IO.MemoryStream MStream1 = new System.IO.MemoryStream();

             CombinImage(image, context.Server.MapPath( "~/images/201292891051540.jpg" )).Save(MStream1, System.Drawing.Imaging.ImageFormat.Png);

             context.Response.ClearContent();

             context.Response.ContentType = "image/png" ;

             context.Response.BinaryWrite(MStream1.ToArray());

 

             //image.Dispose();

             MStream.Dispose();

             MStream1.Dispose();

         }

 

         context.Response.Flush();

         context.Response.End();

     }

 

     /// <summary> 

     /// 調用此函數後使此兩種圖片合併，相似相冊，有個 

     /// 背景圖，中間貼本身的目標圖片 

     /// </summary> 

     /// <param name="imgBack">粘貼的源圖片 

     /// <param name="destImg">粘貼的目標圖片 

     public static Image CombinImage(Image imgBack, string destImg)

     {

         Image img = Image.FromFile(destImg);        //照片圖片   

         if (img.Height != 65 || img.Width != 65 )

         {

             img = KiResizeImage(img, 65 , 65 , 0 );

         }

         Graphics g = Graphics.FromImage(imgBack);

 

         g.DrawImage(imgBack, 0 , 0 , imgBack.Width, imgBack.Height);      //g.DrawImage(imgBack, 0, 0, 相框寬, 相框高);  

 

         //g.FillRectangle(System.Drawing.Brushes.White, imgBack.Width / 2 - img.Width / 2 - 1, imgBack.Width / 2 - img.Width / 2 - 1,1,1);//相片四周刷一層黑色邊框 

 

         //g.DrawImage(img, 照片與相框的左邊距, 照片與相框的上邊距, 照片寬, 照片高); 

 

         g.DrawImage(img, imgBack.Width / 2 - img.Width / 2 , imgBack.Width / 2 - img.Width / 2 , img.Width, img.Height);

         GC.Collect();

         return imgBack;

     }

 

 

     /// <summary> 

     /// Resize圖片 

     /// </summary> 

     /// <param name="bmp">原始Bitmap 

     /// <param name="newW">新的寬度 

     /// <param name="newH">新的高度 

     /// <param name="Mode">保留着，暫時未用 

     /// <returns>處理之後的圖片</returns> 

     public static Image KiResizeImage(Image bmp, int newW, int newH, int Mode)

     {

         try

         {

             Image b = new Bitmap(newW, newH);

             Graphics g = Graphics.FromImage(b);

             // 插值算法的質量 

             g.InterpolationMode = InterpolationMode.HighQualityBicubic;

             g.DrawImage(bmp, new Rectangle( 0 , 0 , newW, newH), new Rectangle( 0 , 0 , bmp.Width, bmp.Height), GraphicsUnit.Pixel);

             g.Dispose();

             return b;

         }

         catch

         {

             return null ;

         }

     }

 

     public bool IsReusable

     {

         get

         {

             return false ;

         }

     }

}