C#生成指定二維碼

//using ThoughtWorks.QRCode.Codec;  引用dll
/// <summary>
/// 生成二維碼
/// </summary>
/// <param name="Content">內容文本</param>
/// <param name="QRCodeEncodeMode">二維碼編碼方式</param>
/// <param name="QRCodeErrorCorrect">糾錯碼等級</param>
/// <param name="QRCodeVersion">二維碼版本號 0-40</param>
/// <param name="QRCodeScale">每個小方格的預設寬度（像素），正整數</param>
/// <param name="size">圖片尺寸（像素），0表示不設置</param>
/// <param name="border">圖片白邊（像素），當size大於0時有效</param>
/// <returns></returns>
public System.Drawing.Image CreateQRCode(string Content, QRCodeEncoder.ENCODE_MODE QRCodeEncodeMode, QRCodeEncoder.ERROR_CORRECTION QRCodeErrorCorrect, int QRCodeVersion, int QRCodeScale, int size, int border)
{
    QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
    qrCodeEncoder.QRCodeEncodeMode = QRCodeEncodeMode;
    qrCodeEncoder.QRCodeErrorCorrect = QRCodeErrorCorrect;
    qrCodeEncoder.QRCodeScale = QRCodeScale;
    qrCodeEncoder.QRCodeVersion = QRCodeVersion;
    System.Drawing.Image image = qrCodeEncoder.Encode(Content);
      
    #region 根據設定的目標圖片尺寸調整二維碼QRCodeScale設置，並添加邊框
    if (size > 0)
    {
        //當設定目標圖片尺寸大於生成的尺寸時，逐步增大方格尺寸
        #region 當設定目標圖片尺寸大於生成的尺寸時，逐步增大方格尺寸
        while (image.Width < size)
        {
            qrCodeEncoder.QRCodeScale++;
            System.Drawing.Image imageNew = qrCodeEncoder.Encode(Content);
            if (imageNew.Width < size)
            {
                image = new System.Drawing.Bitmap(imageNew);
                imageNew.Dispose();
                imageNew = null;
            }
            else
            {
                qrCodeEncoder.QRCodeScale--; //新尺寸未采用，恢復最終使用的尺寸
                imageNew.Dispose();
                imageNew = null;
                break;
            }
        }
        #endregion
          
        //當設定目標圖片尺寸小於生成的尺寸時，逐步減小方格尺寸
        #region 當設定目標圖片尺寸小於生成的尺寸時，逐步減小方格尺寸
        while (image.Width > size && qrCodeEncoder.QRCodeScale > 1)
        {
            qrCodeEncoder.QRCodeScale--;
            System.Drawing.Image imageNew = qrCodeEncoder.Encode(Content);
            image = new System.Drawing.Bitmap(imageNew);
            imageNew.Dispose();
            imageNew = null;
            if (image.Width < size)
            {
                break;
            }
        }
        #endregion
          
        //如果目標尺寸大於生成的圖片尺寸，則為圖片增加白邊
        #region 如果目標尺寸大於生成的圖片尺寸，則為圖片增加白邊
        if (image.Width <= size)
        {
            //根據參數設置二維碼圖片白邊的最小寬度
            #region 根據參數設置二維碼圖片白邊的最小寬度
            if (border > 0)
            {
                while (image.Width <= size && size - image.Width < border * 2 && qrCodeEncoder.QRCodeScale > 1)
                {
                    qrCodeEncoder.QRCodeScale--;
                    System.Drawing.Image imageNew = qrCodeEncoder.Encode(Content);
                    image = new System.Drawing.Bitmap(imageNew);
                    imageNew.Dispose();
                    imageNew = null;
                }
            }
            #endregion
  
            //當目標圖片尺寸大於二維碼尺寸時，將二維碼繪制在目標尺寸白色畫布的中心位置
            if (image.Width < size)
            {
                //新建空白繪圖
                System.Drawing.Bitmap panel = new System.Drawing.Bitmap(size, size);
                System.Drawing.Graphics graphic0 = System.Drawing.Graphics.FromImage(panel);
                int p_left = 0;
                int p_top = 0;
                if (image.Width <= size) //如果原圖比目標形狀寬
                {
                    p_left = (size - image.Width) / 2;
                }
                if (image.Height <= size)
                {
                    p_top = (size - image.Height) / 2;
                }
                  
                //將生成的二維碼圖像粘貼至繪圖的中心位置
                graphic0.DrawImage(image, p_left, p_top, image.Width, image.Height);
                image = new System.Drawing.Bitmap(panel);
                panel.Dispose();
                panel = null;
                graphic0.Dispose();
                graphic0 = null;
            }
        }
        #endregion
    }
    #endregion
    return image;
}
  
private static bool IsTrue() // 在Image類別對圖片進行縮放的時候,需要一個返回bool類別的委托
{
    return true;
}

　　在aspx頁面調用和輸出為圖片流

string content = string.IsNullOrEmpty(Request.QueryString["txt"]) ? "http://www.lenashane.com/" : Request.QueryString["txt"];
int size = Convert.ToInt32(string.IsNullOrEmpty(Request.QueryString["size"]) ? "200" : Request.QueryString["size"]);
int border = Convert.ToInt32(string.IsNullOrEmpty(Request.QueryString["border"]) ? "10" : Request.QueryString["border"]);
  
System.Drawing.Image image = CreateQRCode(content,
    QRCodeEncoder.ENCODE_MODE.BYTE,
    QRCodeEncoder.ERROR_CORRECTION.M,
    0,
    5,
    size,
    border);
  
//將圖片輸出到頁面
System.IO.MemoryStream ms = new System.IO.MemoryStream();
image.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.ContentType = "image/Png";
HttpContext.Current.Response.OutputStream.Write(ms.ToArray(), 0, ms.ToArray().Length);
HttpContext.Current.Response.End();
  
ms.Close();
ms = null;
image.Dispose();
image = null;

　　生成二維碼方法，增加定位點着色參數（System.Drawing.Color），效果如下：

/// <summary>
/// 生成二維碼
/// </summary>
/// <param name="Content">內容文本</param>
/// <param name="QRCodeEncodeMode">二維碼編碼方式</param>
/// <param name="QRCodeErrorCorrect">糾錯碼等級</param>
/// <param name="QRCodeVersion">二維碼版本號 0-40</param>
/// <param name="QRCodeScale">每個小方格的預設寬度（像素），正整數</param>
/// <param name="size">圖片尺寸（像素），0表示不設置</param>
/// <param name="border">圖片白邊（像素），當size大於0時有效</param>
/// <returns></returns>
public System.Drawing.Image CreateQRCode(string Content, QRCodeEncoder.ENCODE_MODE QRCodeEncodeMode, QRCodeEncoder.ERROR_CORRECTION QRCodeErrorCorrect, int QRCodeVersion, int QRCodeScale, int size, int border, Color codeEyeColor)
{
    QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
    qrCodeEncoder.QRCodeEncodeMode = QRCodeEncodeMode;
    qrCodeEncoder.QRCodeErrorCorrect = QRCodeErrorCorrect;
    qrCodeEncoder.QRCodeScale = QRCodeScale;
    qrCodeEncoder.QRCodeVersion = QRCodeVersion;
      
    System.Drawing.Image image = qrCodeEncoder.Encode(Content);
      
    #region 根據設定的目標圖片尺寸調整二維碼QRCodeScale設置，並添加邊框
    if (size > 0)
    {
        //當設定目標圖片尺寸大於生成的尺寸時，逐步增大方格尺寸
        #region 當設定目標圖片尺寸大於生成的尺寸時，逐步增大方格尺寸
        while (image.Width < size)
        {
            qrCodeEncoder.QRCodeScale++;
            System.Drawing.Image imageNew = qrCodeEncoder.Encode(Content);
            if (imageNew.Width < size)
            {
                image = new System.Drawing.Bitmap(imageNew);
                imageNew.Dispose();
                imageNew = null;
            }
            else
            {
                qrCodeEncoder.QRCodeScale--; //新尺寸未采用，恢復最終使用的尺寸
                imageNew.Dispose();
                imageNew = null;
                break;
            }
        }
        #endregion
          
        //當設定目標圖片尺寸小於生成的尺寸時，逐步減小方格尺寸
        #region 當設定目標圖片尺寸小於生成的尺寸時，逐步減小方格尺寸
        while (image.Width > size && qrCodeEncoder.QRCodeScale > 1)
        {
            qrCodeEncoder.QRCodeScale--;
            System.Drawing.Image imageNew = qrCodeEncoder.Encode(Content);
            image = new System.Drawing.Bitmap(imageNew);
            imageNew.Dispose();
            imageNew = null;
            if (image.Width < size)
            {
                break;
            }
        }
        #endregion
  
        //根據參數設置二維碼圖片白邊的最小寬度（按需縮小）
        #region 根據參數設置二維碼圖片白邊的最小寬度
        if (image.Width <= size && border > 0)
        {
            while (image.Width <= size && size - image.Width < border * 2 && qrCodeEncoder.QRCodeScale > 1)
            {
                qrCodeEncoder.QRCodeScale--;
                System.Drawing.Image imageNew = qrCodeEncoder.Encode(Content);
                image = new System.Drawing.Bitmap(imageNew);
                imageNew.Dispose();
                imageNew = null;
            }
        }
        #endregion
          
        //已經確認二維碼圖像，為圖像染色修飾
        if (true)
        {
            //定位點方塊邊長
            int beSize = qrCodeEncoder.QRCodeScale * 3;
              
            int bep1_l = qrCodeEncoder.QRCodeScale * 2;
            int bep1_t = qrCodeEncoder.QRCodeScale * 2;
              
            int bep2_l = image.Width - qrCodeEncoder.QRCodeScale * 5 - 1;
            int bep2_t = qrCodeEncoder.QRCodeScale * 2;
              
            int bep3_l = qrCodeEncoder.QRCodeScale * 2;
            int bep3_t = image.Height - qrCodeEncoder.QRCodeScale * 5 - 1;
              
            int bep4_l = image.Width - qrCodeEncoder.QRCodeScale * 7 - 1;
            int bep4_t = image.Height - qrCodeEncoder.QRCodeScale * 7 - 1;
              
            System.Drawing.Graphics graphic0 = System.Drawing.Graphics.FromImage(image);
              
            // Create solid brush.
            SolidBrush blueBrush = new SolidBrush(codeEyeColor);
              
            // Fill rectangle to screen.
            graphic0.FillRectangle(blueBrush, bep1_l, bep1_t, beSize, beSize);
            graphic0.FillRectangle(blueBrush, bep2_l, bep2_t, beSize, beSize);
            graphic0.FillRectangle(blueBrush, bep3_l, bep3_t, beSize, beSize);
            graphic0.FillRectangle(blueBrush, bep4_l, bep4_t, qrCodeEncoder.QRCodeScale, qrCodeEncoder.QRCodeScale);
        }
          
        //當目標圖片尺寸大於二維碼尺寸時，將二維碼繪制在目標尺寸白色畫布的中心位置
        #region 如果目標尺寸大於生成的圖片尺寸，將二維碼繪制在目標尺寸白色畫布的中心位置
        if (image.Width < size)
        {
            //新建空白繪圖
            System.Drawing.Bitmap panel = new System.Drawing.Bitmap(size, size);
            System.Drawing.Graphics graphic0 = System.Drawing.Graphics.FromImage(panel);
            int p_left = 0;
            int p_top = 0;
            if (image.Width <= size) //如果原圖比目標形狀寬
            {
                p_left = (size - image.Width) / 2;
            }
            if (image.Height <= size)
            {
                p_top = (size - image.Height) / 2;
            }
              
            //將生成的二維碼圖像粘貼至繪圖的中心位置
            graphic0.DrawImage(image, p_left, p_top, image.Width, image.Height);
            image = new System.Drawing.Bitmap(panel);
            panel.Dispose();
            panel = null;
            graphic0.Dispose();
            graphic0 = null;
        }
        #endregion
    }
    #endregion
    return image;
}