Dzwebs.Net

　　只要输入条形码的编码，就可以生成对应的条形码。调用的时候这样来调用。

　　CreateCodeLogo("128");

　　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);
　　}