生成条形码

 

方法一：

 public string bar_code(object str, int ch, int cw, int type_code)

{ 

 //str:输入的字符串;ch:要显示条形码的高度;cw:要显示条形码的宽度;type_code:代码类型

        string strTmp = str.ToString();

        string code = strTmp;

        // ToLower()将string转化成小写形式的副本，返回是使用指定区域的性的大小写规则。

        strTmp = strTmp.ToLower();

        int height = ch;

        int width = cw;

 

        //将传入的参数进行转化。

        strTmp = strTmp.Replace("0", "_|_|__||_||_|"); ;

        strTmp = strTmp.Replace("1", "_||_|__|_|_||");

        strTmp = strTmp.Replace("2", "_|_||__|_|_||");

        strTmp = strTmp.Replace("3", "_||_||__|_|_|");

        strTmp = strTmp.Replace("4", "_|_|__||_|_||");

        strTmp = strTmp.Replace("5", "_||_|__||_|_|");

        strTmp = strTmp.Replace("7", "_|_|__|_||_||");

        strTmp = strTmp.Replace("6", "_|_||__||_|_|");

        strTmp = strTmp.Replace("8", "_||_|__|_||_|");

        strTmp = strTmp.Replace("9", "_|_||__|_||_|");

        strTmp = strTmp.Replace("a", "_||_|_|__|_||");

        strTmp = strTmp.Replace("b", "_|_||_|__|_||");

        strTmp = strTmp.Replace("c", "_||_||_|__|_|");

        strTmp = strTmp.Replace("d", "_|_|_||__|_||");

        strTmp = strTmp.Replace("e", "_||_|_||__|_|");

        strTmp = strTmp.Replace("f", "_|_||_||__|_|");

        strTmp = strTmp.Replace("g", "_|_|_|__||_||");

        strTmp = strTmp.Replace("h", "_||_|_|__||_|");

        strTmp = strTmp.Replace("i", "_|_||_|__||_|");

        strTmp = strTmp.Replace("j", "_|_|_||__||_|");

        strTmp = strTmp.Replace("k", "_||_|_|_|__||");

        strTmp = strTmp.Replace("l", "_|_||_|_|__||");

        strTmp = strTmp.Replace("m", "_||_||_|_|__|");

        strTmp = strTmp.Replace("n", "_|_|_||_|__||");

        strTmp = strTmp.Replace("o", "_||_|_||_|__|");

        strTmp = strTmp.Replace("p", "_|_||_||_|__|");

        strTmp = strTmp.Replace("r", "_||_|_|_||__|");

        strTmp = strTmp.Replace("q", "_|_|_|_||__||");

        strTmp = strTmp.Replace("s", "_|_||_|_||__|");

        strTmp = strTmp.Replace("t", "_|_|_||_||__|");

        strTmp = strTmp.Replace("u", "_||__|_|_|_||");

        strTmp = strTmp.Replace("v", "_|__||_|_|_||");

        strTmp = strTmp.Replace("w", "_||__||_|_|_|");

        strTmp = strTmp.Replace("x", "_|__|_||_|_||");

        strTmp = strTmp.Replace("y", "_||__|_||_|_|");

        strTmp = strTmp.Replace("z", "_|__||_||_|_|");

        strTmp = strTmp.Replace("-", "_|__|_|_||_||");

        strTmp = strTmp.Replace("*", "_|__|_||_||_|");

        strTmp = strTmp.Replace("/", "_|__|__|_|__|");

        strTmp = strTmp.Replace("%", "_|_|__|__|__|");

        strTmp = strTmp.Replace("+", "_|__|_|__|__|");

        strTmp = strTmp.Replace(".", "_||__|_|_||_|");

        strTmp = strTmp.Replace("_", "<span   style='height:" + height + ";width:" + width + ";background:#FFFFFF;'></span>");

        strTmp = strTmp.Replace("|", "<span   style='height:" + height + ";width:" + width + ";background:#000000;'></span>");

 

        if (type_code == 1)

        {

         return strTmp + "<BR>" + code;

        

        }

        else

        {

            return strTmp;

        }

}

随机数：

private int GetRandomNum(int i, int length, int up, int down)

    {

        int iFirst = 0;

        Random ro = new Random(i * length * unchecked((int)DateTime.Now.Ticks));

        iFirst = ro.Next(up, down);

        return iFirst;

 }

 

方法二：

using System.Drawing;

 

public void CreateCodeLogo(string code)

    {

 

        long len = code.Length;

        string lastString = "";

        char[] list = new char[len + 1];

 

 

        list = code.ToCharArray();

 

        for (int i = 0; i < list.Length; i++)

        {

            lastString += this.ConvertToBinaryString(list[i].ToString());

        }

 

        char[] numList = new char[lastString.Length + 1];

        numList = lastString.ToCharArray();

 

 

        Bitmap image = new Bitmap(200, 140);

        Graphics g = Graphics.FromImage(image);

 

        g.Clear(Color.White);

 

        Pen penBlack = new Pen(Color.FromArgb(255, 0, 0, 0), 2.5F);

        Pen penWhite = new Pen(Color.White, 2.5F);

 

        int j = 0;

 

        for (float k = 10; j < numList.Length; k += 2F, j++)

        {

            if (numList[j].ToString() == "1")

            {

                g.DrawLine(penBlack, k, 10, k, 110);

 

            }

            else

            {

                g.DrawLine(penWhite, k, 10, k, 110);

            }

 

            if (j % 4 == 0)

            {

                g.DrawString(list[j / 4].ToString(), new System.Drawing.Font("Courier New", 12), new SolidBrush(Color.Red), k, 112);

            }

        }

        image.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Gif);

    }

 

 

    //将字符串数值转换为二进制字符串数值

    public string ConvertToBinaryString(string buf)

    {

        int[] temp = new int[20];

        string binary;

        int val = 0, i = 0, j;

 

        //先将字符转化为十进制数

        try

        {

            val = Convert.ToInt32(buf);

        }

        catch

        {

            val = 0;

        }

 

        if (val == 0)

        {

            return ("0000");

        }

 

        i = 0;

        while (val != 0)

        {

            temp[i++] = val % 2;

            val /= 2;

        }

 

        binary = "";

 

        for (j = 0; j <= i - 1; j++)

        {

            binary += (char)(temp[i - j - 1] + 48);

        }

 

        if (binary.Length < 4)   //如果小于4位左边补零

        {

            int len = 4 - binary.Length;

            string str = "";

 

            while (len > 0)

            {

                str += "0";

                len--;

            }

 

            binary = str + binary;

        }

 

        return (binary);

    }

 

    protected void Button1_Click(object sender, EventArgs e)

    {

        CreateCodeLogo(TextBox1.Text);

}