public class ExtendFileHelper : Common.FileHelper
{
/// <summary>
/// 生成二维码图片
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
private Bitmap CreateQRimg(string str)
{
QRCodeGenerator qrGenerator = new QRCodeGenerator();
QRCodeData qrCodeData = qrGenerator.CreateQrCode(str, QRCodeGenerator.ECCLevel.Q);
QRCoder.QRCode qrCode = new QRCoder.QRCode(qrCodeData);
Bitmap bt = qrCode.GetGraphic(20);
return bt;
}
/// <summary>
/// 生成二维码图片流（二维码上含文字）
/// </summary>
/// <param name="url">二维码中要传递的数据（地址）</param>
/// <param name="title">二维码上显示的文字说明</param>
public byte[] GenerateQrCode(string url, string title)
{
using (Image codeImage = CreateQRimg(url), strImage = ConvertStringToImage(title))
{
Image img = CombineImage(600, 600, codeImage, 0, 0, strImage, 0, 550);
using (var stream = new MemoryStream())
{
img.Save(stream, ImageFormat.Jpeg);
//输出图片流
return stream.ToArray();
}
}
}
/// <summary>
/// 生成二维码图片流（二维码上含文字）
/// </summary>
/// <param name="str1">二维码中要传递的数据（地址）</param>
/// <param name="str2">二维码上显示的文字说明</param>
public Image GenerateQrCodeImg(string str1, string str2)
{
Image img;
using (Image codeImage = CreateQRimg(str1), strImage = ConvertStringToImage(str2))
{
img = CombineImage(600, 600, codeImage, 0, 0, strImage, 0, 550);
}
return img;
}
/// <summary>
/// 生成文字图片
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
private Image ConvertStringToImage(string str)
{
Bitmap image = new Bitmap(600, 40, PixelFormat.Format24bppRgb);
Graphics g = Graphics.FromImage(image);
try
{
Font font = new Font("SimHei", 14, FontStyle.Regular);
g.Clear(Color.White);
StringFormat format = new StringFormat();
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;
Rectangle rectangle = new Rectangle(0, 0, 600, 40);
g.DrawString(str, font, new SolidBrush(Color.Black), rectangle, format);
return image;
}
catch (Exception e)
{
throw e;
}
finally
{
GC.Collect();
}
}
/// <summary>
/// 在画板中合并二维码图片和文字图片
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <param name="imgLeft"></param>
/// <param name="imgLeft_left"></param>
/// <param name="imgLeft_top"></param>
/// <param name="imgRight"></param>
/// <param name="imgRight_left"></param>
/// <param name="imgRight_top"></param>
/// <returns></returns>
private Image CombineImage(int width, int height, Image imgLeft, int imgLeft_left, int imgLeft_top, Image imgRight, int imgRight_left, int imgRight_top)
{
Bitmap image = new Bitmap(width, height, PixelFormat.Format24bppRgb);
Graphics g = Graphics.FromImage(image);
try
{
g.Clear(Color.White);
g.DrawImage(imgLeft, imgLeft_left, imgLeft_top, 600, 600);
g.DrawImage(imgRight, imgRight_left, imgRight_top, imgRight.Width, imgRight.Height);
return image;
}
catch (Exception e)
{
throw e;
}
finally
{
g.Dispose();
}
}
}
输出流调用方式：
var qrCode = new ExtendFileHelper();
var url = "http://www.baidu.com";
var image = qrCode.GenerateQrCode(url, "这是标题");
Response.ClearContent();
Response.ContentType = "image/Jpeg";
Response.BinaryWrite(image);
Response.Flush();
保存图片文件：
var qrCode = new ExtendFileHelper();
var url = "http://www.baidu.com";
var image = qrCode.GenerateQrCodeImg(url, "这是标题");
image.Save(AppDomain.CurrentDomain.BaseDirectory+"/Upload/"+DateTime.Now.ToString("yyyyMMddHHmmss") + ".png");
