/// <summary>
/// 在二维码的中添加它的内容的文字
/// </summary>
/// <param name="image"></param>
/// <param name="content"></param>
public static Image QRCodeAddContent(Image image, string content, RectangleF rectangleF, Font font = null, SolidBrush solidBrush = null, StringFormat stringFormat = null)
{
try
{
//参数为空时的默认值
if (font == null)
{
font = new Font("黑体", (image.Height / 10) / 2);
}
if (solidBrush == null)
{
solidBrush = new SolidBrush(Color.Black);
}
if (stringFormat == null)
{
stringFormat = new StringFormat(StringFormatFlags.FitBlackBox);
}
//计算绘制文本所需的大小
using (Graphics graphics = Graphics.FromImage(image))
{
SizeF sizef = graphics.MeasureString(content, font, image.Width, stringFormat);
rectangleF = new RectangleF()
{
X = rectangleF.X,
Y = rectangleF.Y,
Width = rectangleF.Width,
Height = sizef.Height,
};
}
Size newSize = new Size()
{
Width = image.Size.Width,
Height = Convert.ToInt32(image.Height + rectangleF.Height),
};
Point point = new Point()
{
X = 0,
Y = 0,
};
image = QRCodeCommon.ChangImageSize(image, newSize, point);
using (Graphics graphics = Graphics.FromImage(image))
{
graphics.DrawString(content, font, solidBrush, rectangleF, stringFormat);
}
return(image);
}
catch (Exception)
{
throw;
}
}
/// <summary>
/// 把文本保存为条码
/// </summary>
/// <param name="path">保存路径</param>
/// <param name="content">文本内容</param>
/// <param name="size">图片大小</param>
/// <param name="barcodeFormat">条码种类</param>
/// <param name="margin">外边距</param>
/// <param name="encoding">编码模式</param>
/// <param name="errorCorrectionLevel">错误修正等级</param>
/// <param name="imageFormat">图片类型</param>
public static void SavePicture(
string path, string content, Size size, BarcodeFormat barcodeFormat, int margin = 0, string encoding = "UTF-8",
ErrorCorrectionLevel errorCorrectionLevel = null, ImageFormat imageFormat = null)
{
try
{
using (Stream stream = File.Create(path))
{
Image image = QRCodeCommon.TextToBitmap(content, size, barcodeFormat, margin, encoding, errorCorrectionLevel);
//保存不了Ico文件。。。不知道为什么
image.Save(stream, imageFormat ?? ImageFormat.Png);
}
}
catch (Exception)
{
throw;
}
}
/// <summary>
/// 把文本转换成Bitmap
/// </summary>
/// <param name="content">文本内容</param>
/// <param name="size">图片大小</param>
/// <param name="barcodeFormat">条码种类</param>
/// <param name="margin">外边距</param>
/// <param name="encoding">编码模式</param>
/// <param name="errorCorrectionLevel">错误修正等级</param>
/// <returns></returns>
public static Bitmap TextToBitmap(
string content, Size size, BarcodeFormat barcodeFormat, int margin = 0, string encoding = "UTF-8", ErrorCorrectionLevel errorCorrectionLevel = null)
{
try
{
//在生成图片之前先处理下Size然后在下方加上数据
BarcodeWriter barcodeWriter = new BarcodeWriter();
barcodeWriter.Format = barcodeFormat;
barcodeWriter.Options.Width = size.Width;
barcodeWriter.Options.Height = size.Height;
barcodeWriter.Options.Margin = margin;
barcodeWriter.Options.Hints.Add(EncodeHintType.CHARACTER_SET, encoding);
barcodeWriter.Options.Hints.Add(EncodeHintType.ERROR_CORRECTION, errorCorrectionLevel ?? ErrorCorrectionLevel.H);
///bit矩阵？？
ZXing.Common.BitMatrix bitMatrix = barcodeWriter.Encode(content);
Bitmap bitmap = barcodeWriter.Write(bitMatrix);
RectangleF rectangleF = new RectangleF()
{
X = 0,
Y = bitmap.Size.Height,
Width = bitmap.Size.Width,
Height = (bitmap.Size.Height / 10),
};
bitmap = (Bitmap)QRCodeCommon.QRCodeAddContent(bitmap, content, rectangleF);
if (bitmap == null)
{
throw new Exception("生成二维码失败");
}
else
{
return(bitmap);
}
}
catch (Exception)
{
throw;
}
}