C# Qrcode生成二维码支持中文,带图片，带文字 2015-01-22 15:11 617人阅读 评论(1) 收藏

1.下载Qrcode库源码，下载地址：http://www.codeproject.com/Articles/20574/Open-Source-QRCode-Library

2.打开源码时，部分类库可能会加载失败，不用理会，只需正常加载 QRCodeLib、QRCodeSampleApp 即可。

3.生成时，会提示编译出错，Error'ThoughtWorks.QRCode.Properties.Resources' does not contain a definition for 'GetResource'。

需修改错误提示的代码行为：

MemoryStream memoryStream = new MemoryStream((byte[])Resources.ResourceManager.GetObject(fileName));

修改支持中文

修改库QRCodeLib中的类QRCodeEncoder.cs

public virtual Bitmap Encode(String content)

{

if (QRCodeUtility.IsUniCode(content))

{

return Encode(content, Encoding.Unicode);

}

else

{

return Encode(content, Encoding.ASCII);

}

}

为

public virtual Bitmap Encode(String content)

{

if (QRCodeUtility.IsUniCode(content))

{

return Encode(content, Encoding.GetEncoding("gb2312"));

}

else

{

return Encode(content, Encoding.ASCII);

}

}

对应的，QRCodeDecoder.cs类中的相应代码也要改。这样就中英文支持了。（改为UTF8也可以）

扩展

1、修改 QRCodeEncoder.cs 跟 QRCodeDecoder.cs

Search一下,將 Encoding.Unicode 替換成 Encoding.UTF8

2、修改 QRCodeUtility.cs

將 UnicodeEncoding encoding = new UnicodeEncoding();改成 UTF8Encoding encoding = new UTF8Encoding();

使用

QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();

String encoding = cboEncoding.Text ;

if (encoding == "Byte") {

qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;

} else if (encoding == "AlphaNumeric") {

qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.ALPHA_NUMERIC;

} else if (encoding == "Numeric") {

qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.NUMERIC;

}

try {

int scale = Convert.ToInt16(txtSize.Text);

qrCodeEncoder.QRCodeScale = scale;

} catch (Exception ex) {

MessageBox.Show("Invalid size!");

return;

}

try {

int version = Convert.ToInt16(cboVersion.Text) ;

qrCodeEncoder.QRCodeVersion = version;

} catch (Exception ex) {

MessageBox.Show("Invalid version !");

}

string errorCorrect = cboCorrectionLevel.Text;

if (errorCorrect == "L")

qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L;

else if (errorCorrect == "M")

qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;

else if (errorCorrect == "Q")

qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.Q;

else if (errorCorrect == "H")

qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.H;

Image image;

String data = txtEncodeData.Text;

image = qrCodeEncoder.Encode(data);

picEncode.Image = image;

带图片

/// <summary>

/// 生成二维码.

/// </summary>

/// <param name="data">需要添加进去的文本</param>

/// <returns></returns>

public System.Drawing.Image GCode(String data)

{

QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();

qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;

qrCodeEncoder.QRCodeScale = 5;

qrCodeEncoder.QRCodeVersion = 7;

qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L;

var pbImg = qrCodeEncoder.Encode(data, System.Text.Encoding.UTF8);

var width = pbImg.Width / 10;

var dwidth = width * 2;

Bitmap bmp = new Bitmap(pbImg.Width + dwidth, pbImg.Height + dwidth);

Graphics g = Graphics.FromImage(bmp);

var c = System.Drawing.Color.White;

g.FillRectangle(new SolidBrush(c), 0, 0, pbImg.Width + dwidth, pbImg.Height + dwidth);

g.DrawImage(pbImg, width, width);

g.Dispose();

return bmp;

}

/// <summary>

/// 调用此函数后使此两种图片合并，类似相册，有个

/// 背景图，中间贴自己的目标图片

/// </summary>

/// <param name="sourceImg">粘贴的源图片</param>

/// <param name="destImg">粘贴的目标图片</param>

public static System.Drawing.Image CombinImage(System.Drawing.Image imgBack, string destImg)

{

System.Drawing.Image img = System.Drawing.Image.FromFile(destImg); //照片图片

if (img.Height != 50 || img.Width != 50) {

img = KiResizeImage(img, 50, 50, 0);

}

Graphics g = Graphics.FromImage(imgBack);

g.DrawImage(imgBack, 0, 0, imgBack.Width, imgBack.Height); //g.DrawImage(imgBack, 0, 0, 相框宽, 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);//相片四周刷一层黑色边框

//g.DrawImage(img, 照片与相框的左边距, 照片与相框的上边距, 照片宽, 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图片

/// </summary>

/// <param name="bmp">原始Bitmap</param>

/// <param name="newW">新的宽度</param>

/// <param name="newH">新的高度</param>

/// <param name="Mode">保留着，暂时未用</param>

/// <returns>处理以后的图片</returns>

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

{

try

{

System.Drawing.Image b = new Bitmap(newW, newH);

Graphics g = Graphics.FromImage(b);

// 插值算法的质量

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;

}

}

参考：http://www.daojia100.com/jingyan/info/51b2def12e05e81a20c042a8.aspx

完整Demo下载：http://download.csdn.net/detail/a497785609/8387311