C# 霍尼韦尔扫码枪扫码打印

程序运行背景条件：

1、将扫码枪调制串口驱动模式

2、将扫码枪所在串口拆分成几个虚拟串口

3、扫码枪扫描条码就打印条码

4、winform程序

条码控件使用 devexpress.xtraeditors.barcodecontrol   控件 barma

 

 barma 控件加载时将文本居中

barma.verticalalignment = devexpress.utils.vertalignment.center;
barma.horizontalalignment = devexpress.utils.horzalignment.near;
barma.horizontaltextalignment = devexpress.utils.horzalignment.center;
barma.verticaltextalignment = devexpress.utils.vertalignment.center;

barma 添加事件

barma.textchanged += barma_textchanged;
barma.paint += barma_paint;

 

为窗体添加printpreviewdialog和printdocument控件

printpreviewdialog1的document属性设置为printdocument1

printdocument1添加事件  printdocument1.printpage += printdocument1_printpage;

虚拟串口：

serialport spreceive; //spreceive接受数据
private delegate void mydelegate(string indata);
private mydelegate showdelegate = null;

 

spreceive = new serialport(cbreviceserial.selecteditem.tostring(), convert.toint32(cbdatarate.selecteditem.tostring()), parity.none, 8, stopbits.one);
spreceive.datareceived += new serialdatareceivedeventhandler(datareceivedhandler);
spreceive.open();
showdelegate = new mydelegate(show);

//串口数据监听事件

private void datareceivedhandler(object sender, serialdatareceivedeventargs e)
{
serialport sp = (serialport)sender;
this.invoke(showdelegate, new object[] { sp.readexisting() });
}
void show(string indata)
{
txtbarcode.text = indata;
barma.text = indata;
}

private void barma_textchanged(object sender, eventargs e)
{
btncreat_click(sender, e);
}

//生成条码事件

private void btncreat_click(object sender, eventargs e)
{
barma.text = txtbarcode.text.trim();
barma.size = new size(convert.toint32(txtbarw.text), convert.toint32(txtbarh.text));
}

//条码控件重绘事件。在条码重绘事件中打印条码可以有效的将条码重绘之后的条码打印，在其他情况下打印条码会打印之前的条码

private void barma_paint(object sender, painteventargs e)
{
if (iopent)//虚拟串口打开状态下
{
capturescreen(barma); //绘制条形码
 printdocument1.print();
}
}

//打印条码事件

private void btnprint_click(object sender, eventargs e)
{
capturescreen(barma); //绘制条形码
printdocument1.print();
}

 

#region 绘制条形码

/// <summary>
/// 绘制条形码
/// </summary>
private void capturescreen(control control)
{
using (graphics g = control.creategraphics())
{
size s = control.size;
mimage = new bitmap(s.width, s.height, g); //实例化bitmap对象
using (graphics mg = graphics.fromimage(mimage)) //实例化graphics画图对象
{
intptr dc1 = g.gethdc(); //获取panel句柄
intptr dc2 = mg.gethdc(); //获取绘图对象句柄
//绘制panel控件中内容
bitblt(dc2, 0, 0, control.width, control.height, dc1, 0, 0, 13369376);
g.releasehdc(dc1); //释放panel句柄资源
mg.releasehdc(dc2); //释放绘图对象句柄资源
}
}
}

private void printdocument1_printpage(object sender, system.drawing.printing.printpageeventargs e)
{
e.graphics.drawimage(mimage, 0, 0); //img大小
e.hasmorepages = false;
//e.graphics.drawstring(barma.text, ft, system.drawing.brushes.black, 0, 0);
}

#endregion

#region 将一幅位图从一个设备场景复制到另一个
/// <summary>
/// 将一幅位图从一个设备场景复制到另一个
/// </summary>
/// <param name="hdcdest">目标设备场景</param>
/// <param name="nxdest">对目标dc中目标矩形左上角位置进行描述的那个点,用目标dc的逻辑x坐标表示</param>
/// <param name="nydest">对目标dc中目标矩形左上角位置进行描述的那个点,用目标dc的逻辑y坐标表示</param>
/// <param name="nwidth">欲传输图象的宽度</param>
/// <param name="nheight">欲传输图象的高度</param>
/// <param name="hdcsrc">源设备场景,如光栅运算未指定源，则应设为0</param>
/// <param name="nxsrc">对源dc中源矩形左上角位置进行描述的那个点用源dc的逻辑x坐标表示</param>
/// <param name="nysrc">对源dc中源矩形左上角位置进行描述的那个点用源dc的逻辑y坐标表示</param>
/// <param name="dwrop">传输过程要执行的光栅运算</param>
/// <returns>非零表示成功，零表示失败</returns>
[dllimport("gdi32.dll")]
public static extern long bitblt(intptr hdcdest, int nxdest, int nydest, int nwidth,

int nheight, intptr hdcsrc, int nxsrc, int nysrc, int dwrop);

#endregion