<一>路由
routes.MapRoute(
name: "home",
url: "home/GetBar/{id}",
defaults: new { controller = "Home", action = "GetBar", id = UrlParameter.Optional }
);
<二>HTML页
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>条形码</title>
<script src="~/Scripts/jquery-1.10.2.js"></script>
<script>
function wds_createbar() {
var num = $("#codenum").val();
$("#img-div").attr("src", "/home/GetBar?rom="+num);
}
</script>
</head>
<body>
<div>
<input type="text" value="" id="codenum"/>
<input type="button" value="生成条形码" onclick="wds_createbar()"/><br>
<div style="width: 200px;height: 200px" id="wds-bar-div">
<img id="img-div" />
</div>
</div>
</body>
</html>
<三>控制器
public void GetBar()
{
var strNum = Request.QueryString["rom"];
if (!string.IsNullOrEmpty(strNum))
{
Bitmap b = GetCode39(strNum);
var stream = new MemoryStream();
b.Save(stream, ImageFormat.Png);
var imagebytes = stream.ToArray();
Response.OutputStream.Write(imagebytes, 0, imagebytes.Length);
//在电脑上形成图片
//string filename1 = "d:\\22.jpg";=
//b.Save(filename1, ImageFormat.Jpeg);
}
}
//生成条形码的方法
private Bitmap GetCode39(string strSource)
{
int x = 5; //左邊界
int y = 0; //上邊界
int WidLength = 4; //粗BarCode長度
int NarrowLength =2; //細BarCode長度
int BarCodeHeight =72; //BarCode高度
int intSourceLength = strSource.Length;
string strEncode = "010010100"; //編碼字串 初值為 起始符號 *
string AlphaBet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%*"; //Code39的字母
string[] Code39 = //Code39的各字母對應碼
{
/* 0 */ "000110100",
/* 1 */ "100100001",
/* 2 */ "001100001",
/* 3 */ "101100000",
/* 4 */ "000110001",
/* 5 */ "100110000",
/* 6 */ "001110000",
/* 7 */ "000100101",
/* 8 */ "100100100",
/* 9 */ "001100100",
/* A */ "100001001",
/* B */ "001001001",
/* C */ "101001000",
/* D */ "000011001",
/* E */ "100011000",
/* F */ "001011000",
/* G */ "000001101",
/* H */ "100001100",
/* I */ "001001100",
/* J */ "000011100",
/* K */ "100000011",
/* L */ "001000011",
/* M */ "101000010",
/* N */ "000010011",
/* O */ "100010010",
/* P */ "001010010",
/* Q */ "000000111",
/* R */ "100000110",
/* S */ "001000110",
/* T */ "000010110",
/* U */ "110000001",
/* V */ "011000001",
/* W */ "111000000",
/* X */ "010010001",
/* Y */ "110010000",
/* Z */ "011010000",
/* - */ "010000101",
/* . */ "110000100",
/*' '*/ "011000100",
/* $ */ "010101000",
/* / */ "010100010",
/* + */ "010001010",
/* % */ "000101010",
/* * */ "010010100"
};
strSource = strSource.ToUpper();
//實作圖片
Bitmap objBitmap = new Bitmap(
((WidLength * 3 + NarrowLength * 7) * (intSourceLength + 2)) + (x * 2),
BarCodeHeight + (y * 2));
Graphics objGraphics = Graphics.FromImage(objBitmap); //宣告GDI+繪圖介面
//填上底色
objGraphics.FillRectangle(Brushes.White, 0, 0, objBitmap.Width, objBitmap.Height);
for (int i = 0; i < intSourceLength; i++)
{
if (AlphaBet.IndexOf(strSource[i]) == -1 || strSource[i] == '*') //檢查是否有非法字元
{
objGraphics.DrawString("含有非法字元", SystemFonts.DefaultFont, Brushes.Red, x, y);
return objBitmap;
}
//查表編碼
strEncode = string.Format("{0}0{1}", strEncode, Code39[AlphaBet.IndexOf(strSource[i])]);
}
strEncode = string.Format("{0}0010010100", strEncode); //補上結束符號 *
int intEncodeLength = strEncode.Length; //編碼後長度
int intBarWidth;
for (int i = 0; i < intEncodeLength; i++) //依碼畫出Code39 BarCode
{
intBarWidth = strEncode[i] == '1' ? WidLength : NarrowLength;
objGraphics.FillRectangle(i % 2 == 0 ? Brushes.Black : Brushes.White,
x, y, intBarWidth, BarCodeHeight);
x += intBarWidth;
}
return objBitmap;
}
