.NET(C#)生成条形码

 using System;
 using System.Data;
 using System.Configuration;
 using System.Web;
 using System.Web.Security;
 using System.Web.UI;
 using System.Web.UI.WebControls;
 using System.Web.UI.WebControls.WebParts;
 using System.Web.UI.HtmlControls;

 public partial class _Default : System.Web.UI.Page
 {
 protected void Page_Load(object sender, EventArgs e)
 {
 Response.Write(bar_code("www.sosuo8.com", , , ));
 }
 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("", "_|_|__||_||_|"); ;
 strTmp = strTmp.Replace("", "_||_|__|_|_||");
 strTmp = strTmp.Replace("", "_|_||__|_|_||");
 strTmp = strTmp.Replace("", "_||_||__|_|_|");
 strTmp = strTmp.Replace("", "_|_|__||_|_||");
 strTmp = strTmp.Replace("", "_||_|__||_|_|");
 strTmp = strTmp.Replace("", "_|_|__|_||_||");
 strTmp = strTmp.Replace("", "_|_||__||_|_|");
 strTmp = strTmp.Replace("", "_||_|__|_||_|");
 strTmp = strTmp.Replace("", "_|_||__|_||_|");
 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 == )
 {
 return strTmp + "<BR>" + code;
 }
 else
 {
 return strTmp;
 }
 }
 }

 方法二：
 using System.Drawing;

 public void CreateCodeLogo(string code)
     {

         long len = code.Length;
         string lastString = "";
         char[] list = new char[len + ];

         list = code.ToCharArray();

         for (int i = ; i < list.Length; i++)
         {
             lastString += this.ConvertToBinaryString(list[i].ToString());
         }

         char[] numList = new char[lastString.Length + ];
         numList = lastString.ToCharArray();

         Bitmap image = new Bitmap(, );
         Graphics g = Graphics.FromImage(image);

         g.Clear(Color.White);

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

         int j = ;

         for (float k = ; j < numList.Length; k += 2F, j++)
         {
             if (numList[j].ToString() == "")
             {
                 g.DrawLine(penBlack, k, , k, );

             }
             else
             {
                 g.DrawLine(penWhite, k, , k, );
             }

             if (j %  == )
             {
                 g.DrawString(list[j / ].ToString(), new System.Drawing.Font("Courier New", ), new SolidBrush(Color.Red), k, );
             }
         }
         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[];
         string binary;
         int val = , i = , j;

         //先将字符转化为十进制数
         try
         {
             val = Convert.ToInt32(buf);
         }
         catch
         {
             val = ;
         }

         if (val == )
         {
             return ("");
         }

         i = ;
         while (val != )
         {
             temp[i++] = val % ;
             val /= ;
         }

         binary = "";

         for (j = ; j <= i - ; j++)
         {
             binary += (char)(temp[i - j - ] + );
         }

         if (binary.Length < )   //如果小于4位左边补零
         {
             int len =  - binary.Length;
             string str = "";

             while (len > )
             {
                 str += "";
                 len--;
             }

             binary = str + binary;
         }

         return (binary);
     }

     protected void Button1_Click(object sender, EventArgs e)
     {
         CreateCodeLogo(TextBox1.Text);
 }