public void PrintParseFuntion(PrintItemModel printItem, object other = null)
{
try
{
Graphics g = (Graphics)other;
//这里无法精细化绘制一维码,是抛弃该打印方式的的主要原因.
//如果说有更好的、高还原的一维码生成解决方案便可采纳.
//但依然存在着如进纸的精准性控制、效果细微差别、条码长度不可控等问题.
//CODE_128不支持中文字符,这里的值如果是中文,将会抛出异常.
Bitmap img = BarCodeHelper.CreateBarCode(printItem.PrintKeyValue, BarcodeFormat.CODE_128, new EncodingOptions()
{
Height = (PrintRuleBase.GetPrintParameterByName <int>(printItem, "pHeight", this.GetType().Name)) / 3, PureBarcode = true, Margin = 0
});
g.DrawImageUnscaled
(
img,
(int)(PrintRuleBase.GetPrintParameterByName <int>(printItem, "pX", this.GetType().Name) + printItem.XDeviation) / 3,
(int)(PrintRuleBase.GetPrintParameterByName <int>(printItem, "pY", this.GetType().Name) + printItem.YDeviation) / 3
);
}
catch (Exception ex)
{
throw new Exception(string.Format("打印{0}异常:{1}", this.GetType().Name, ex.Message));
}
}
public void PrintParseFuntion(PrintItemModel printItem, object other = null)
{
try
{
Graphics g = (Graphics)other;
//1像素的大小是不确定的.图像大小400*500,表示长400个像素单位,宽500个像素单位.不同分辨率的设备像素单位大小不一样,因此图像显示得有大有小.
//创建出的图像最小都是 21*21个像素点
//300点打印机和Graphics像素单位长度之比为1:3(1像素单位长度固定).
//Bitmap的Width为像素点个数,因此在绘制二维码时,用printItem.Width / 3弥补素单位长度之比造成的图像放大.
//即printItem.Width为300点打印机像素点个数,printItem.Width / 3为转化后对应在的Graphics中像素点个数.
Bitmap img = BarCodeHelper.CreateBarCode(printItem.PrintKeyValue, BarcodeFormat.QR_CODE, new EncodingOptions()
{
Width = (int)printItem.Width / 3, Height = (int)printItem.Height / 3, PureBarcode = true, Margin = 0
});
g.DrawImageUnscaled
(
img,
(PrintRuleBase.GetPrintParameterByName <int>(printItem, "pX", this.GetType().Name) + printItem.XDeviation) / 3,
(PrintRuleBase.GetPrintParameterByName <int>(printItem, "pY", this.GetType().Name) + printItem.YDeviation) / 3
);
}
catch (Exception ex)
{
throw new Exception(string.Format("打印{0}异常:{1}", this.GetType().Name, ex.Message));
}
}
public override void EndInit()
{
base.EndInit();
//工具箱中控件 反射创建该控件时 不会触发EndInit
if (EncodingOptionsHeight == 200 && EncodingOptionsWidth == 200)
{
img.Source = null;
img.Source = ImageHelper.ChangeBitmapToImageSource(BarCodeHelper.CreateBarCode(_printkeyValue, BarcodeFormat.QR_CODE, new EncodingOptions()
{
Width = EncodingOptionsWidth, Height = EncodingOptionsHeight, PureBarcode = true, Margin = EncodingOptionsMargin
}));
MinHeight = MaxHeight = Height = MinWidth = MaxWidth = Width = (img.Source.Width);
}
}