前台代码：
<script type="text/javascript">
function fresh() { var getimagecode = document.getElementById("testimg"); var val = document.getElementById("txtcontent").value; getimagecode.src = "../Home/codeindex?content=" + val; }</script><html><head> <meta name="viewport" content="width=device-width" /> <title>TXM</title></head><body> <div> <input type="text" id="txtcontent" value="1234"/> <input type="button" value="click" οnclick="fresh()"/><img id="testimg" width="100px" height="50px" src="/Home/codeindex"/> </div></body></html>后台代码：
public ActionResult codeindex(string content)
{ BarCode128 bc = new BarCode128(); if (string.IsNullOrEmpty(content)) { content = "123456789"; } Bitmap bmp = new Bitmap(bc.GetCodeImage(content, BarCode128.Encode.Code128B)); //Bitmap bmp = bc.GetCodeImage("12345", BarCode128.Encode.Code128B); //清除该页输出缓存，设置该页无缓存 Response.Buffer = true; Response.ExpiresAbsolute = System.DateTime.Now.AddMilliseconds(0); Response.Expires = 0; Response.CacheControl = "no-cache"; Response.AppendHeader("Pragma", "No-Cache"); 将图片写入内存流，并将其以 "image/Png" 格式输出 MemoryStream ms = new MemoryStream(); try { bmp.Save(@"D:\11.png", ImageFormat.Png); bmp.Save(ms, ImageFormat.Png); Response.ClearContent(); Response.ContentType = "image/Png"; Response.BinaryWrite(ms.ToArray());}
finally { //显式释放资源 bmp.Dispose(); //g.Dispose(); }//Response.End();
return new EmptyResult();//return View();
byte[] byData = new byte[ms.Length]; ms.Read(byData, 0, byData.Length); ms.Close(); return File(byData, "image/Png"); }public class BarCode128 //转载代码
{ private DataTable m_Code128 = new DataTable(); private uint m_Height = 40; /// <summary> /// 高度 /// </summary> public uint Height { get { return m_Height; } set { m_Height = value; } } private Font m_ValueFont = null; /// <summary> /// 是否显示可见号码 如果为NULL不显示号码 /// </summary> public Font ValueFont { get { return m_ValueFont; } set { m_ValueFont = value; } } private byte m_Magnify = 0; /// <summary> /// 放大倍数 /// </summary> public byte Magnify { get { return m_Magnify; } set { m_Magnify = value; } }public enum Encode
{ Code128A, //数字、大写字母、控制字符 Code128B, //数字、大小字母、字符 Code128C, //双位数字 EAN128 }public BarCode128()
{ m_Code128.Columns.Add("ID"); m_Code128.Columns.Add("Code128A"); m_Code128.Columns.Add("Code128B"); m_Code128.Columns.Add("Code128C"); m_Code128.Columns.Add("BandCode"); m_Code128.CaseSensitive = true; #region 数据表 m_Code128.Rows.Add("0", " ", " ", "00", "212222"); m_Code128.Rows.Add("1", "!", "!", "01", "222122"); m_Code128.Rows.Add("2", "\"", "\"", "02", "222221"); m_Code128.Rows.Add("3", "#", "#", "03", "121223"); m_Code128.Rows.Add("4", "$", "$", "04", "121322"); m_Code128.Rows.Add("5", "%", "%", "05", "131222"); m_Code128.Rows.Add("6", "&", "&", "06", "122213"); m_Code128.Rows.Add("7", "'", "'", "07", "122312"); m_Code128.Rows.Add("8", "(", "(", "08", "132212"); m_Code128.Rows.Add("9", ")", ")", "09", "221213"); m_Code128.Rows.Add("10", "*", "*", "10", "221312"); m_Code128.Rows.Add("11", "+", "+", "11", "231212"); m_Code128.Rows.Add("12", ",", ",", "12", "112232"); m_Code128.Rows.Add("13", "-", "-", "13", "122132"); m_Code128.Rows.Add("14", ".", ".", "14", "122231"); m_Code128.Rows.Add("15", "/", "/", "15", "113222"); m_Code128.Rows.Add("16", "0", "0", "16", "123122"); m_Code128.Rows.Add("17", "1", "1", "17", "123221"); m_Code128.Rows.Add("18", "2", "2", "18", "223211"); m_Code128.Rows.Add("19", "3", "3", "19", "221132"); m_Code128.Rows.Add("20", "4", "4", "20", "221231"); m_Code128.Rows.Add("21", "5", "5", "21", "213212"); m_Code128.Rows.Add("22", "6", "6", "22", "223112"); m_Code128.Rows.Add("23", "7", "7", "23", "312131"); m_Code128.Rows.Add("24", "8", "8", "24", "311222"); m_Code128.Rows.Add("25", "9", "9", "25", "321122"); m_Code128.Rows.Add("26", ":", ":", "26", "321221"); m_Code128.Rows.Add("27", ";", ";", "27", "312212"); m_Code128.Rows.Add("28", "<", "<", "28", "322112"); m_Code128.Rows.Add("29", "=", "=", "29", "322211"); m_Code128.Rows.Add("30", ">", ">", "30", "212123"); m_Code128.Rows.Add("31", "?", "?", "31", "212321"); m_Code128.Rows.Add("32", "@", "@", "32", "232121"); m_Code128.Rows.Add("33", "A", "A", "33", "111323"); m_Code128.Rows.Add("34", "B", "B", "34", "131123"); m_Code128.Rows.Add("35", "C", "C", "35", "131321"); m_Code128.Rows.Add("36", "D", "D", "36", "112313"); m_Code128.Rows.Add("37", "E", "E", "37", "132113"); m_Code128.Rows.Add("38", "F", "F", "38", "132311"); m_Code128.Rows.Add("39", "G", "G", "39", "211313"); m_Code128.Rows.Add("40", "H", "H", "40", "231113"); m_Code128.Rows.Add("41", "I", "I", "41", "231311"); m_Code128.Rows.Add("42", "J", "J", "42", "112133"); m_Code128.Rows.Add("43", "K", "K", "43", "112331"); m_Code128.Rows.Add("44", "L", "L", "44", "132131"); m_Code128.Rows.Add("45", "M", "M", "45", "113123"); m_Code128.Rows.Add("46", "N", "N", "46", "113321"); m_Code128.Rows.Add("47", "O", "O", "47", "133121"); m_Code128.Rows.Add("48", "P", "P", "48", "313121"); m_Code128.Rows.Add("49", "Q", "Q", "49", "211331"); m_Code128.Rows.Add("50", "R", "R", "50", "231131"); m_Code128.Rows.Add("51", "S", "S", "51", "213113"); m_Code128.Rows.Add("52", "T", "T", "52", "213311"); m_Code128.Rows.Add("53", "U", "U", "53", "213131"); m_Code128.Rows.Add("54", "V", "V", "54", "311123"); m_Code128.Rows.Add("55", "W", "W", "55", "311321"); m_Code128.Rows.Add("56", "X", "X", "56", "331121"); m_Code128.Rows.Add("57", "Y", "Y", "57", "312113"); m_Code128.Rows.Add("58", "Z", "Z", "58", "312311"); m_Code128.Rows.Add("59", "[", "[", "59", "332111"); m_Code128.Rows.Add("60", "\\", "\\", "60", "314111"); m_Code128.Rows.Add("61", "]", "]", "61", "221411"); m_Code128.Rows.Add("62", "^", "^", "62", "431111"); m_Code128.Rows.Add("63", "_", "_", "63", "111224"); m_Code128.Rows.Add("64", "NUL", "`", "64", "111422"); m_Code128.Rows.Add("65", "SOH", "a", "65", "121124"); m_Code128.Rows.Add("66", "STX", "b", "66", "121421"); m_Code128.Rows.Add("67", "ETX", "c", "67", "141122"); m_Code128.Rows.Add("68", "EOT", "d", "68", "141221"); m_Code128.Rows.Add("69", "ENQ", "e", "69", "112214"); m_Code128.Rows.Add("70", "ACK", "f", "70", "112412"); m_Code128.Rows.Add("71", "BEL", "g", "71", "122114"); m_Code128.Rows.Add("72", "BS", "h", "72", "122411"); m_Code128.Rows.Add("73", "HT", "i", "73", "142112"); m_Code128.Rows.Add("74", "LF", "j", "74", "142211"); m_Code128.Rows.Add("75", "VT", "k", "75", "241211"); m_Code128.Rows.Add("76", "FF", "I", "76", "221114"); m_Code128.Rows.Add("77", "CR", "m", "77", "413111"); m_Code128.Rows.Add("78", "SO", "n", "78", "241112"); m_Code128.Rows.Add("79", "SI", "o", "79", "134111"); m_Code128.Rows.Add("80", "DLE", "p", "80", "111242"); m_Code128.Rows.Add("81", "DC1", "q", "81", "121142"); m_Code128.Rows.Add("82", "DC2", "r", "82", "121241"); m_Code128.Rows.Add("83", "DC3", "s", "83", "114212"); m_Code128.Rows.Add("84", "DC4", "t", "84", "124112"); m_Code128.Rows.Add("85", "NAK", "u", "85", "124211"); m_Code128.Rows.Add("86", "SYN", "v", "86", "411212"); m_Code128.Rows.Add("87", "ETB", "w", "87", "421112"); m_Code128.Rows.Add("88", "CAN", "x", "88", "421211"); m_Code128.Rows.Add("89", "EM", "y", "89", "212141"); m_Code128.Rows.Add("90", "SUB", "z", "90", "214121"); m_Code128.Rows.Add("91", "ESC", "{", "91", "412121"); m_Code128.Rows.Add("92", "FS", "|", "92", "111143"); m_Code128.Rows.Add("93", "GS", "}", "93", "111341"); m_Code128.Rows.Add("94", "RS", "~", "94", "131141"); m_Code128.Rows.Add("95", "US", "DEL", "95", "114113"); m_Code128.Rows.Add("96", "FNC3", "FNC3", "96", "114311"); m_Code128.Rows.Add("97", "FNC2", "FNC2", "97", "411113"); m_Code128.Rows.Add("98", "SHIFT", "SHIFT", "98", "411311"); m_Code128.Rows.Add("99", "CODEC", "CODEC", "99", "113141"); m_Code128.Rows.Add("100", "CODEB", "FNC4", "CODEB", "114131"); m_Code128.Rows.Add("101", "FNC4", "CODEA", "CODEA", "311141"); m_Code128.Rows.Add("102", "FNC1", "FNC1", "FNC1", "411131"); m_Code128.Rows.Add("103", "StartA", "StartA", "StartA", "211412"); m_Code128.Rows.Add("104", "StartB", "StartB", "StartB", "211214"); m_Code128.Rows.Add("105", "StartC", "StartC", "StartC", "211232"); m_Code128.Rows.Add("106", "Stop", "Stop", "Stop", "2331112"); #endregion }public Bitmap GetCodeImage(string p_Text, Encode p_Code)
{ string _ViewText = p_Text; string _Text = ""; IList<int> _TextNumb = new List<int>(); int _Examine = 0; //首位 switch (p_Code) { case Encode.Code128C: _Examine = 105; if (!((p_Text.Length & 1) == 0)) throw new Exception("128C长度必须是偶数"); while (p_Text.Length != 0) { int _Temp = 0; try { int _CodeNumb128 = Int32.Parse(p_Text.Substring(0, 2)); } catch { throw new Exception("128C必须是数字！"); } _Text += GetValue(p_Code, p_Text.Substring(0, 2), ref _Temp); _TextNumb.Add(_Temp); p_Text = p_Text.Remove(0, 2); } break; case Encode.EAN128: _Examine = 105; if (!((p_Text.Length & 1) == 0)) throw new Exception("EAN128长度必须是偶数"); _TextNumb.Add(102); _Text += "411131"; while (p_Text.Length != 0) { int _Temp = 0; try { int _CodeNumb128 = Int32.Parse(p_Text.Substring(0, 2)); } catch { throw new Exception("128C必须是数字！"); } _Text += GetValue(Encode.Code128C, p_Text.Substring(0, 2), ref _Temp); _TextNumb.Add(_Temp); p_Text = p_Text.Remove(0, 2); } break; default: if (p_Code == Encode.Code128A) { _Examine = 103; } else { _Examine = 104; }while (p_Text.Length != 0)
{ int _Temp = 0; string _ValueCode = GetValue(p_Code, p_Text.Substring(0, 1), ref _Temp); if (_ValueCode.Length == 0) throw new Exception("无效的字符集!" + p_Text.Substring(0, 1).ToString()); _Text += _ValueCode; _TextNumb.Add(_Temp); p_Text = p_Text.Remove(0, 1); } break; } if (_TextNumb.Count == 0) throw new Exception("错误的编码,无数据"); _Text = _Text.Insert(0, GetValue(_Examine)); //获取开始位for (int i = 0; i != _TextNumb.Count; i++)
{ _Examine += _TextNumb[i] * (i + 1); } _Examine = _Examine % 103; //获得严效位 _Text += GetValue(_Examine); //获取严效位 _Text += "2331112"; //结束位 Bitmap _CodeImage = GetImage(_Text); GetViewText(_CodeImage, _ViewText); return _CodeImage; }private string GetValue(Encode p_Code, string p_Value, ref int p_SetID)
{ if (m_Code128 == null) return ""; DataRow[] _Row = m_Code128.Select(p_Code.ToString() + "='" + p_Value + "'"); if (_Row.Length != 1) throw new Exception("错误的编码" + p_Value.ToString()); p_SetID = Int32.Parse(_Row[0]["ID"].ToString()); return _Row[0]["BandCode"].ToString(); } /// <summary> /// 根据编号获得条纹 /// </summary> /// <param name="p_CodeId"></param> /// <returns></returns> private string GetValue(int p_CodeId) { DataRow[] _Row = m_Code128.Select("ID='" + p_CodeId.ToString() + "'"); if (_Row.Length != 1) throw new Exception("验效位的编码错误" + p_CodeId.ToString()); return _Row[0]["BandCode"].ToString(); } /// <summary> /// 获得条码图形 /// </summary> /// <param name="p_Text">文字</param> /// <returns>图形</returns> private Bitmap GetImage(string p_Text) { char[] _Value = p_Text.ToCharArray(); int _Width = 0; for (int i = 0; i != _Value.Length; i++) { _Width += Int32.Parse(_Value[i].ToString()) * (m_Magnify + 1); } Bitmap _CodeImage = new Bitmap(_Width, (int)m_Height); Graphics _Garphics = Graphics.FromImage(_CodeImage); //Pen _Pen; int _LenEx = 0; for (int i = 0; i != _Value.Length; i++) { int _ValueNumb = Int32.Parse(_Value[i].ToString()) * (m_Magnify + 1); //获取宽和放大系数 if (!((i & 1) == 0)) { //_Pen = new Pen(Brushes.White, _ValueNumb); _Garphics.FillRectangle(Brushes.White, new Rectangle(_LenEx, 0, _ValueNumb, (int)m_Height)); } else { //_Pen = new Pen(Brushes.Black, _ValueNumb); _Garphics.FillRectangle(Brushes.Black, new Rectangle(_LenEx, 0, _ValueNumb, (int)m_Height)); } //_Garphics.(_Pen, new Point(_LenEx, 0), new Point(_LenEx, m_Height)); _LenEx += _ValueNumb; } _Garphics.Dispose(); return _CodeImage; } /// <summary> /// 显示可见条码文字 如果小于40 不显示文字 /// </summary> /// <param name="p_Bitmap">图形</param> private void GetViewText(Bitmap p_Bitmap, string p_ViewText) { if (m_ValueFont == null) return;Graphics _Graphics = Graphics.FromImage(p_Bitmap);
SizeF _DrawSize = _Graphics.MeasureString(p_ViewText, m_ValueFont); if (_DrawSize.Height > p_Bitmap.Height - 10 || _DrawSize.Width > p_Bitmap.Width) { _Graphics.Dispose(); return; }int _StarY = p_Bitmap.Height - (int)_DrawSize.Height;
_Graphics.FillRectangle(Brushes.White, new Rectangle(0, _StarY, p_Bitmap.Width, (int)_DrawSize.Height)); _Graphics.DrawString(p_ViewText, m_ValueFont, Brushes.Black, 0, _StarY); }//12345678
//(105 + (1 * 12 + 2 * 34 + 3 * 56 + 4 *78)) % 103 = 47 //结果为starc +12 +34 +56 +78 +47 +end//internal Image GetCodeImage(string p)
//{ // throw new NotImplementedException(); //} }