vc制作条形码

开发环境：VC++6.0

PDF开发包：PDFlib-Lite-7.0.5

开发demo：

/* 
 * PDFlib client: hello example in C
 * pdflib-BarCode
 */

#include <stdio.h>
#include <stdlib.h>
#include <String.h>

#include "pdflib.h"
#include "Code39.h"

FILE *fp;

void drawTable(PDF *p, double x0, double y0, double height, double width);
void addText(PDF *p, double x0, double y0, char *barCode);

int main(void)
{
    PDF *p;
    int font;

	double startX,startY;
	double pageEdgeX,pageEdgeY;
	double tableEdgeX,tableEdgeY;
	double tableHeight, tableWidth;

    /* create a new PDFlib object */
    if ((p = PDF_new()) == (PDF *) 0)
    {
        printf("Couldn't create PDFlib object (out of memory)!\n");
        return(2);
    }

    PDF_TRY(p) {
		/* This means we must check return values of load_font() etc. */
		PDF_set_parameter(p, "errorpolicy", "return");
		PDF_set_parameter(p, "hypertextencoding", "host");		//--(增加位置)

		if (PDF_begin_document(p, "hello.pdf", 0, "") == -1) {
			printf("Error: %s\n", PDF_get_errmsg(p));
			return(2);
		}

		/* This line is required to avoid problems on Japanese systems */
		//PDF_set_parameter(p, "hypertextencoding", "host");	//--(注释位置)

		PDF_set_info(p, "Creator", "hello.c");
		PDF_set_info(p, "Author", "Thomas Merz");
		PDF_set_info(p, "Title", "Hello, world (C)!");

		PDF_begin_page_ext(p, a4_width, a4_height, "");

		/* Change "host" encoding to "winansi" or whatever you need! */
		font = PDF_load_font(p, "Helvetica-Bold", 0, "host", "");
		if (font == -1) {
			printf("Error: %s\n", PDF_get_errmsg(p));
			PDF_delete(p);
			return(2);
		}

		PDF_save(p);

		//#define a4_width	 595.0
		//#define a4_height	 842.0
		//左下角为(0,0)
		//x横向，y纵向

		pageEdgeX = 20;
		pageEdgeY = 20;
		tableEdgeX = 10;
		tableEdgeY = 20;
		tableHeight = 30;
		tableWidth = 180;

		fp = fopen("out.txt", "w");
		if(!fp)
		{
			printf("file errpr!\n");
			return -1;
		}

		startX = pageEdgeX;
		startY = a4_height-pageEdgeY;
		drawTable(p, startX, startY, tableHeight, tableWidth);
		addText(p, startX, startY, "SN301");

		drawTable(p, startX, startY-(tableEdgeX+tableHeight), tableHeight, tableWidth);
		addText(p, startX, startY-(tableEdgeX+tableHeight), "SN302");

		drawTable(p, startX, startY-2*(tableEdgeX+tableHeight), tableHeight, tableWidth);
		addText(p, startX, startY-2*(tableEdgeX+tableHeight), "SN303");

		PDF_restore(p);

		PDF_end_page_ext(p, "");

		PDF_end_document(p, "");
    }

    PDF_CATCH(p) {
        printf("PDFlib exception occurred in hello sample:\n");
        printf("[%d] %s: %s\n",
	    PDF_get_errnum(p), PDF_get_apiname(p), PDF_get_errmsg(p));
        PDF_delete(p);
        return(2);
    }

    PDF_delete(p);

    return 0;
}


void drawTable(PDF *p, double x0, double y0, double height, double width)
{
	PDF_setcolor(p, "fillstroke", "rgb", 0, 0, 0, 0);
	PDF_setlinewidth(p, 0.1);

	//横向
	PDF_moveto(p, x0, y0);
	PDF_lineto(p, x0+width, y0);
	PDF_stroke(p);
	PDF_moveto(p, x0, y0-height);
	PDF_lineto(p, x0+width, y0-height);
	PDF_stroke(p);

	//竖向
	PDF_moveto(p, x0, y0);
	PDF_lineto(p, x0, y0-height);
	PDF_stroke(p);

	PDF_moveto(p, x0+50, y0);
	PDF_lineto(p, x0+50, y0-height);
	PDF_stroke(p);

	PDF_moveto(p, x0+width, y0);
	PDF_lineto(p, x0+width, y0-height);
	PDF_stroke(p);
}

void addText(PDF *p,  double x0, double y0, char *barCode)
{
	int font, font_ch;
	double posX,posY;

	font = PDF_load_font(p, "Helvetica", 0, "host", "");
	if (font == -1) {
			printf("Error: %s\n", PDF_get_errmsg(p));
			PDF_delete(p);
			return;
		}

	font_ch = PDF_load_font(p, "STSong-Light", 0, "GB-EUC-H", "");
	if (font == -1) {
			printf("Error: %s\n", PDF_get_errmsg(p));
			PDF_delete(p);
			return;
		}

	///*
	posX = x0;
	posY = y0;
	PDF_save(p);
	PDF_setfont(p, font_ch, 12);
	PDF_set_text_pos(p, posX+5, posY-20);
	PDF_show(p, "条形码");
	PDF_restore(p);

	//条码
	char *text = barCode;
	if(Code39Verify(text)==-1)
	{
		printf("involid char\n");
		return;
	}
	char partial[1024]="";
	if(Code39Encode(text, partial)==-1)
	{
		printf("code error\n");
		return;
	}
	fwrite(partial, strlen(partial), 1, fp);
	fwrite("\r\n", strlen("\r\n"), 1, fp);

	double codeWid = 0.8;
	double codeHig = 10;
	char *str = partial;
	posX = x0+60;
	posY = y0-5;

	PDF_setcolor(p, "fillstroke", "rgb", 0, 0, 0, 0);
	PDF_setlinewidth(p, codeWid);

	PDF_save(p);
	while(*str)
	{
		for(int i=0; i<(*str-'0'); i++)
		{
			PDF_moveto(p, posX, posY);
			PDF_lineto(p, posX, posY-codeHig);
			posX += codeWid;
			PDF_stroke(p);
		}

		str++;
		posX += codeWid*(*str-'0');
		str++; 
	}
	PDF_restore(p);

	//条码字符
	posX = x0;
	posY = y0-10;
	PDF_save(p);
	PDF_setfont(p, font, 8);
	PDF_set_text_pos(p, posX+60, posY-15);
	PDF_show(p, barCode);
	PDF_restore(p);
}

// Code39.h: interface for the CCode39 class.
//
//////////////////////////////////////////////////////////////////////

//Code39编码
	static char *code39set[]={
		"111221211",//0
		"211211112",//1
		"112211112",//2
		"212211111",//3
		"111221112",//4
		"211221111",//5
		"112221111",//6
		"111211212",//7
		"211211211",//8
		"112211211",//9
		"211112112",//A
		"112112112",//B
		"212112111",//C
		"111122112",//D
		"211122111",//E
		"112122111",//F
		"111112212",//G
		"211112211",//H
		"112112211",//I
		"111122211",//J
		"211111122",//K
		"112111122",//L
		"212111121",//M
		"111121122",//N
		"211121121",//O
		"112121121",//P
		"111111222",//Q
		"211111221",//R
		"112111221",//S
		"111121221",//T
		"221111112",//U
		"122111112",//V
		"222111111",//W
		"121121112",//X
		"221121111",//Y
		"122121111",//Z
		"121111212",//-
		"221111211",//.
		"122111211",//Space
		"121212111",//$
		"121211121",///
		"121112121",//+
		"111212121",//%
		"121121211",//*
	};

	int Code39Encode(char* text, char* partial);
	int Code39Verify(char* text);

// Code39.cpp: implementation of the CCode39 class.
//
//////////////////////////////////////////////////////////////////////

#include <String.h>

#include "Code39.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////


Code39Verify(char* text)
{
	if(text[0]=='\0')
		return -1;
	while(*text&&((*text>='A'&&*text<='Z')||
		(*text>='0'&&*text<='9')||
		(*text=='-')||
		(*text=='.')||
		(*text=='$')||
		(*text==' ')||
		(*text=='/')||
		(*text=='+')||
		(*text=='%')||
		(*text=='*')))
		text++;
	if(*text)
		return -1;
	return 0;//OK
}


int Code39Encode(char* text, char* partial)
{
	unsigned i;
	char *str = text;

	if(!partial)
	{
		return -1;
	}
	
	//首字符为*
	strcat(partial,code39set[43]);
	strcat(partial,"2");

	//如果字符串为空，则返回
	if(!(*text))
	{
		return -1;
	}

	for(i=0;i<strlen(text);i++)
	{
		if((*str>='A') && (*str<='Z'))
			strcat(partial,code39set[*str-'A'+10]);
		else if((*str>='0') && (*str<='9'))
			strcat(partial,code39set[*str-'0']);
		else if(*str=='-')
			strcat(partial,code39set[36]);
		else if(*str=='.')
			strcat(partial,code39set[37]);
		else if(*str==' ')
			strcat(partial,code39set[38]);
		else if(*str=='$')
			strcat(partial,code39set[39]);
		else if(*str=='/')
			strcat(partial,code39set[40]);
		else if(*str=='+')
			strcat(partial,code39set[41]);
		else if(*str=='%')
			strcat(partial,code39set[42]);
		else if(*str=='*')
			strcat(partial,code39set[43]);
		else
		{
			return -1;
		}
		str++;

		//每两个字符之间加一个白线
		strcat(partial,"2");
	}
	//结束符为*
	strcat(partial,code39set[43]);

	return 0;
}

VC工程下载：http://download.csdn.net/detail/zhuyonghao123/7539803