我一直在使用这里的代码将三位数字转换为条形码，以便在我工作的公司进行扫描。
我只发现一个条形码有问题。 当它编码"002"时，它会输出"Ì002 Î"。 我发现这不会扫描空间。 花了很多时间搜索和寻找该空间中应该包含的内容以及扫描的内容。 我发现这里的条形码生成器代码具有 Â 作为检查字符。
现在对于我的问题，我如何更改代码以正确编码？或者，是否有另一个免费的代码示例，我可以实现以获取代码 128 条形码？
我已经像这样实现它
MEKBarcodeLBL.Text = HazmatLabels.Classes.BarcodeConverter128.StringToBarcode(MEKScrapLBL.Text).PadLeft(3, '0');
提前感谢您的所有帮助!!!
条码转换器128.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace HazmatLabels.Classes
{
/// <summary>
/// Code 128
/// Convert an input string to the equivilant string including start and stop characters.
/// This object compresses the values to the shortest possible code 128 barcode format
/// </summary>
public static class BarcodeConverter128
{
/// <summary>
/// Converts an input string to the equivilant string, that need to be produced using the 'Code 128' font.
/// </summary>
/// <param name="value">String to be encoded</param>
/// <returns>Encoded string start/stop and checksum characters included</returns>
public static string StringToBarcode(string value)
{
// Parameters : a string
// Return : a string which give the bar code when it is dispayed with CODE128.TTF font
// : an empty string if the supplied parameter is no good
int charPos, minCharPos;
int currentChar, checksum;
bool isTableB = true, isValid = true;
string returnValue = string.Empty;
if (value.Length > 0)
{
// Check for valid characters
for (int charCount = 0; charCount < value.Length; charCount++)
{
//currentChar = char.GetNumericValue(value, charPos);
currentChar = (int)char.Parse(value.Substring(charCount, 1));
if (!(currentChar >= 32 && currentChar <= 126))
{
isValid = false;
break;
}
}
// Barcode is full of ascii characters, we can now process it
if (isValid)
{
charPos = 0;
while (charPos < value.Length)
{
if (isTableB)
{
// See if interesting to switch to table C
// yes for 4 digits at start or end, else if 6 digits
if (charPos == 0 || charPos + 4 == value.Length)
minCharPos = 4;
else
minCharPos = 6;
minCharPos = BarcodeConverter128.IsNumber(value, charPos, minCharPos);
if (minCharPos < 0)
{
// Choice table C
if (charPos == 0)
{
// Starting with table C
returnValue = ((char)205).ToString(); // char.ConvertFromUtf32(205);
}
else
{
// Switch to table C
returnValue = returnValue + ((char)199).ToString();
}
isTableB = false;
}
else
{
if (charPos == 0)
{
// Starting with table B
returnValue = ((char)204).ToString(); // char.ConvertFromUtf32(204);
}
}
}
if (!isTableB)
{
// We are on table C, try to process 2 digits
minCharPos = 2;
minCharPos = BarcodeConverter128.IsNumber(value, charPos, minCharPos);
if (minCharPos < 0) // OK for 2 digits, process it
{
currentChar = int.Parse(value.Substring(charPos, 2));
currentChar = currentChar < 95 ? currentChar + 32 : currentChar + 100;
returnValue = returnValue + ((char)currentChar).ToString();
charPos += 2;
}
else
{
// We haven't 2 digits, switch to table B
returnValue = returnValue + ((char)200).ToString();
isTableB = true;
}
}
if (isTableB)
{
// Process 1 digit with table B
returnValue = returnValue + value.Substring(charPos, 1);
charPos++;
}
}
// Calculation of the checksum
checksum = 0;
for (int loop = 0; loop < returnValue.Length; loop++)
{
currentChar = (int)char.Parse(returnValue.Substring(loop, 1));
currentChar = currentChar < 127 ? currentChar - 32 : currentChar - 100;
if (loop == 0)
checksum = currentChar;
else
checksum = (checksum + (loop * currentChar)) % 103;
}
// Calculation of the checksum ASCII code
checksum = checksum < 95 ? checksum + 32 : checksum + 100;
// Add the checksum and the STOP
returnValue = returnValue +
((char)checksum).ToString() +
((char)206).ToString();
}
}
return returnValue;
}
private static int IsNumber(string InputValue, int CharPos, int MinCharPos)
{
// if the MinCharPos characters from CharPos are numeric, then MinCharPos = -1
MinCharPos--;
if (CharPos + MinCharPos < InputValue.Length)
{
while (MinCharPos >= 0)
{
if ((int)char.Parse(InputValue.Substring(CharPos + MinCharPos, 1)) < 48
|| (int)char.Parse(InputValue.Substring(CharPos + MinCharPos, 1)) > 57)
{
break;
}
MinCharPos--;
}
}
return MinCharPos;
}
}
}
这是另一个代码，我不确定如何实现它。
代码128渲染.cs
using System;
using System.Drawing;
using System.Diagnostics;
namespace GenCode128
{
/// <summary>
/// Summary description for Code128Rendering.
/// </summary>
public static class Code128Rendering
{
#region Code patterns
// in principle these rows should each have 6 elements
// however, the last one -- STOP -- has 7. The cost of the
// extra integers is trivial, and this lets the code flow
// much more elegantly
private static readonly int[,] cPatter
ns =
{
{2,1,2,2,2,2,0,0}, // 0
{2,2,2,1,2,2,0,0}, // 1
{2,2,2,2,2,1,0,0}, // 2
{1,2,1,2,2,3,0,0}, // 3
{1,2,1,3,2,2,0,0}, // 4
{1,3,1,2,2,2,0,0}, // 5
{1,2,2,2,1,3,0,0}, // 6
{1,2,2,3,1,2,0,0}, // 7
{1,3,2,2,1,2,0,0}, // 8
{2,2,1,2,1,3,0,0}, // 9
{2,2,1,3,1,2,0,0}, // 10
{2,3,1,2,1,2,0,0}, // 11
{1,1,2,2,3,2,0,0}, // 12
{1,2,2,1,3,2,0,0}, // 13
{1,2,2,2,3,1,0,0}, // 14
{1,1,3,2,2,2,0,0}, // 15
{1,2,3,1,2,2,0,0}, // 16
{1,2,3,2,2,1,0,0}, // 17
{2,2,3,2,1,1,0,0}, // 18
{2,2,1,1,3,2,0,0}, // 19
{2,2,1,2,3,1,0,0}, // 20
{2,1,3,2,1,2,0,0}, // 21
{2,2,3,1,1,2,0,0}, // 22
{3,1,2,1,3,1,0,0}, // 23
{3,1,1,2,2,2,0,0}, // 24
{3,2,1,1,2,2,0,0}, // 25
{3,2,1,2,2,1,0,0}, // 26
{3,1,2,2,1,2,0,0}, // 27
{3,2,2,1,1,2,0,0}, // 28
{3,2,2,2,1,1,0,0}, // 29
{2,1,2,1,2,3,0,0}, // 30
{2,1,2,3,2,1,0,0}, // 31
{2,3,2,1,2,1,0,0}, // 32
{1,1,1,3,2,3,0,0}, // 33
{1,3,1,1,2,3,0,0}, // 34
{1,3,1,3,2,1,0,0}, // 35
{1,1,2,3,1,3,0,0}, // 36
{1,3,2,1,1,3,0,0}, // 37
{1,3,2,3,1,1,0,0}, // 38
{2,1,1,3,1,3,0,0}, // 39
{2,3,1,1,1,3,0,0}, // 40
{2,3,1,3,1,1,0,0}, // 41
{1,1,2,1,3,3,0,0}, // 42
{1,1,2,3,3,1,0,0}, // 43
{1,3,2,1,3,1,0,0}, // 44
{1,1,3,1,2,3,0,0}, // 45
{1,1,3,3,2,1,0,0}, // 46
{1,3,3,1,2,1,0,0}, // 47
{3,1,3,1,2,1,0,0}, // 48
{2,1,1,3,3,1,0,0}, // 49
{2,3,1,1,3,1,0,0}, // 50
{2,1,3,1,1,3,0,0}, // 51
{2,1,3,3,1,1,0,0}, // 52
{2,1,3,1,3,1,0,0}, // 53
{3,1,1,1,2,3,0,0}, // 54
{3,1,1,3,2,1,0,0}, // 55
{3,3,1,1,2,1,0,0}, // 56
{3,1,2,1,1,3,0,0}, // 57
{3,1,2,3,1,1,0,0}, // 58
{3,3,2,1,1,1,0,0}, // 59
{3,1,4,1,1,1,0,0}, // 60
{2,2,1,4,1,1,0,0}, // 61
{4,3,1,1,1,1,0,0}, // 62
{1,1,1,2,2,4,0,0}, // 63
{1,1,1,4,2,2,0,0}, // 64
{1,2,1,1,2,4,0,0}, // 65
{1,2,1,4,2,1,0,0}, // 66
{1,4,1,1,2,2,0,0}, // 67
{1,4,1,2,2,1,0,0}, // 68
{1,1,2,2,1,4,0,0}, // 69
{1,1,2,4,1,2,0,0}, // 70
{1,2,2,1,1,4,0,0}, // 71
{1,2,2,4,1,1,0,0}, // 72
{1,4,2,1,1,2,0,0}, // 73
{1,4,2,2,1,1,0,0}, // 74
{2,4,1,2,1,1,0,0}, // 75
{2,2,1,1,1,4,0,0}, // 76
{4,1,3,1,1,1,0,0}, // 77
{2,4,1,1,1,2,0,0}, // 78
{1,3,4,1,1,1,0,0}, // 79
{1,1,1,2,4,2,0,0}, // 80
{1,2,1,1,4,2,0,0}, // 81
{1,2,1,2,4,1,0,0}, // 82
{1,1,4,2,1,2,0,0}, // 83
{1,2,4,1,1,2,0,0}, // 84
{1,2,4,2,1,1,0,0}, // 85
{4,1,1,2,1,2,0,0}, // 86
{4,2,1,1,1,2,0,0}, // 87
{4,2,1,2,1,1,0,0}, // 88
{2,1,2,1,4,1,0,0}, // 89
{2,1,4,1,2,1,0,0}, // 90
{4,1,2,1,2,1,0,0}, // 91
{1,1,1,1,4,3,0,0}, // 92
{1,1,1,3,4,1,0,0}, // 93
{1,3,1,1,4,1,0,0}, // 94
{1,1,4,1,1,3,0,0}, // 95
{1,1,4,3,1,1,0,0}, // 96
{4,1,1,1,1,3,0,0}, // 97
{4,1,1,3,1,1,0,0}, // 98
{1,1,3,1,4,1,0,0}, // 99
{1,1,4,1,3,1,0,0}, // 100
{3,1,1,1,4,1,0,0}, // 101
{4,1,1,1,3,1,0,0}, // 102
{2,1,1,4,1,2,0,0}, // 103
{2,1,1,2,1,4,0,0}, // 104
{2,1,1,2,3,2,0,0}, // 105
{2,3,3,1,1,1,2,0} // 106
};
#endregion Code patterns
private const int cQuietWidth = 10;
/// <summary>
/// Make an image of a Code128 barcode for a given string
/// </summary>
/// <param name="InputData">Message to be encoded</param>
/// <param name="BarWeight">Base thickness for bar width (1 or 2 works well)</param>
/// <param name="AddQuietZone">Add required horiz margins (use if output is tight)</param>
/// <returns>An Image of the Code128 barcode representing the message</returns>
public static Image MakeBarcodeImage(string InputData, int BarWeight, bool AddQuietZone)
{
// get the Code128 codes to represent the message
Code128Content content = new Code128Content(InputData);
int[] codes = content.Codes;
int width, height;
width = ((codes.Length - 3) * 11 + 35) * BarWeight;
height = Convert.ToInt32(System.Math.Ceiling(Convert.ToSingle(width) * .15F));
if (AddQuietZone)
{
width += 2 * cQuietWidth * BarWeight; // on both sides
}
// get surface to draw on
Image myimg = new System.Drawing.Bitmap(width, height);
using (Graphics gr = Graphics.FromImage(myimg))
{
// set to white so we don't have to fill the spaces with white
gr.FillRectangle(System.Drawing.Brushes.White, 0, 0, width, height);
// skip quiet zone
int cursor = AddQuietZone ? cQuietWidth * BarWeight : 0;
for (int codeidx = 0; codeidx < codes.Length; codeidx++)
{
int code = codes[codeidx];
// take the bars two at a time: a black and a white
for (int bar = 0; bar < 8; bar += 2)
{
int barwidth = cPatterns[code, bar] * BarWeight;
int spcwidth = cPatterns[code, bar + 1] * BarWeight;
// if width is zero, don't try to draw it
if (barwidth > 0)
{
gr.FillRectangle(System.Drawing.Brushes.Black, cursor, 0, barwidth, height);
}
// note that we never need to draw the space, since we
// initialized the graphics to all white
// advance cursor beyond this pair
cursor += (barwidth + spcwidth);
}
}
}
return myimg;
}
}
}
代码128内容.cs
using System;
using System.Text;
namespace GenCode128
{
public enum CodeSet
{
CodeA
, CodeB
// ,CodeC // not supported
}
/// <summary>
/// Represent the set of code values to be output into barcode form
/// </summary>
public class Code128Content
{
private int[] mCodeList;
/// <summary>
/// Create content based on a string of ASCII data
/// </summary>
/// <param name="AsciiData">the string that should be represented</param>
public Code128Content(string AsciiData)
{
mCodeList = StringToCode128(AsciiData);
}
/// <summary>
/// Provides the Code128 code values representing the object's string
/// </summary>
public int[] Codes
{
get
{
return mCodeList;
}
}
/// <summary>
/// Transform the string into integers representing the Code128 codes
/// necessary to represent it
/// </summary>
/// <param name="AsciiData">String to be encoded</param>
/// <returns>Code128 representation</returns>
private int[] StringToCode128(string AsciiData)
{
// turn the string into ascii byte data
byte[] asciiBytes = Encoding.ASCII.GetBytes(AsciiData);
// decide which codeset to start with
Code128Code.CodeSetAllowed csa1 = asciiBytes.Length > 0 ? Code128Code.CodesetAllowedForChar(asciiBytes[0]) : Code128Code.CodeSetAllowed.CodeAorB;
Code128Code.CodeSetAllowed csa2 = asciiBytes.Length > 0 ? Code128Code.CodesetAllowedForChar(asciiBytes[1]) : Code128Code.CodeSetAllowed.CodeAorB;
CodeSet currcs = GetBestStartSet(csa1, csa2);
// set up the beginning of the barcode
System.Collections.ArrayList codes = new System.Collections.ArrayList(asciiBytes.Length + 3); // assume no codeset changes, account for start, checksum, and stop
codes.Add(Code128Code.StartCodeForCodeSet(currcs));
// add the codes for each character in the string
for (int i = 0; i < asciiBytes.Length; i++)
{
int thischar = asciiBytes[i];
int nextchar = asciiBytes.Length > (i + 1) ? asciiBytes[i + 1] : -1;
codes.AddRange(Code128Code.CodesForChar(thischar, nextchar, ref currcs));
}
// calculate the check digit
int checksum = (int)(codes[0]);
for (int i = 1; i < codes.Count; i++)
{
checksum += i * (int)(codes[i]);
}
codes.Add(checksum % 103);
codes.Add(Code128Code.StopCode());
int[] result = codes.ToArray(typeof(int)) as int[];
return result;
}
/// <summary>
/// Determines the best starting code set based on the the first two
/// characters of the string to be encoded
/// </summary>
/// <param name="csa1">First character of input string</param>
/// <param name="csa2">Second character of input string</param>
/// <returns>The codeset determined to be best to start with</returns>
private CodeSet GetBestStartSet(Code128Code.CodeSetAllowed csa1, Code128Code.CodeSetAllowed csa2)
{
int vote = 0;
vote += (csa1 == Code128Code.CodeSetAllowed.CodeA) ? 1 : 0;
vote += (csa1 == Code128Code.CodeSetAllowed.CodeB) ? -1 : 0;
vote += (csa2 == Code128Code.CodeSetAllowed.CodeA) ? 1 : 0;
vote += (csa2 == Code128Code.CodeSetAllowed.CodeB) ? -1 : 0;
return (vote > 0) ? CodeSet.CodeA : CodeSet.CodeB; // ties go to codeB due to my own prejudices
}
}
/// <summary>
/// Static tools for determining codes for individual characters in the content
/// </summary>
public static class Code128Code
{
#region Constants
private const int cSHIFT = 98;
private const int cCODEA = 101;
private const int cCODEB = 100;
private const int cSTARTA = 103;
private const int cSTARTB = 104;
private const int cSTOP = 106;
#endregion
/// <summary>
/// Get the Code128 code value(s) to represent an ASCII character, with
/// optional look-ahead for length optimization
/// </summary>
/// <param name="CharAscii">The ASCII value of the character to translate</param>
/// <param name="LookAheadAscii">The next character in sequence (or -1 if none)</param>
/// <param name="CurrCodeSet">The current codeset, that the returned codes need to follow;
/// if the returned codes change that, then this value will be changed to reflect it</param>
/// <returns>An array of integers representing the codes that need to be output to produce the
/// given character</returns>
public static int[] CodesForChar(int CharAscii, int LookAheadAscii, ref CodeSet CurrCodeSet)
{
int[] result;
int shifter = -1;
if (!CharCompatibleWithCodeset(CharAscii, CurrCodeSet))
{
// if we have a lookahead character AND if the next character is ALSO not compatible
if ((LookAheadAscii != -1) && !CharCompatibleWithCodeset(LookAheadAscii, CurrCodeSet))
{
// we need to switch code sets
switch (CurrCodeSet)
{
case CodeSet.CodeA:
shifter = cCODEB;
CurrCodeSet = CodeSet.CodeB;
break;
case CodeSet.CodeB:
shifter = cCODEA;
CurrCodeSet = CodeSet.CodeA;
break;
}
}
else
{
// no need to switch code sets, a temporary SHIFT will suffice
shifter = cSHIFT;
}
}
if (shifter != -1)
{
result = new int[2];
result[0] = shifter;
result[1] = CodeValueForChar(CharAscii);
}
else
{
result = new int[1];
result[0] = CodeValueForChar(CharAscii);
}
return result;
}
/// <summary>
/// Tells us which codesets a given character value is allowed in
/// </summary>
/// <param name="CharAscii">ASCII value of character to look at</param>
/// <returns>Which codeset(s) can be used to represent this character</returns>
public static CodeSetAllowed CodesetAllowedForChar(int CharAscii)
{
if (CharAscii >= 32 && CharAscii <= 95)
{
return CodeSetAllowed.CodeAorB;
}
else
{
return (CharAscii < 32) ? CodeSetAllowed.CodeA : CodeSetAllowed.CodeB;
}
}
/// <summary>
/// Determine if a character can be represented in a given codeset
/// </summary>
/// <param name="CharAscii">character to check for</param>
/// <param name="currcs">codeset context to test</param>
/// <returns>true if the codeset contains a representation for the ASCII character</returns>
public static bool CharCompatibleWithCodeset(int CharAscii, CodeSet currcs)
{
CodeSetAllowed csa = CodesetAllowedForChar(CharAscii);
return csa == CodeSetAllowed.CodeAorB
|| (csa == CodeSetAllowed.CodeA && currcs == CodeSet.CodeA)
|| (csa == CodeSetAllowed.CodeB && currcs == CodeSet.CodeB);
}
/// <summary>
/// Gets the integer code128 code value for a character (assuming the appropriate code set)
/// </summary>
/// <param name="CharAscii">character to convert</param>
/// <returns>code128 symbol value for the character</returns>
public static int CodeValueForChar(int CharAscii)
{
return (CharAscii >= 32) ? CharAscii - 32 : CharAscii + 64;
}
/// <summary>
/// Return the appropriate START code depending on the codeset we want to be in
/// </summary>
/// <param name="cs">The codeset you want to start in</param>
/// <returns>The code128 code to start a barcode in that codeset</returns>
public static int StartCodeForCodeSet(CodeSet cs)
{
return cs == CodeSet.CodeA ? cSTARTA : cSTARTB;
}
/// <summary>
/// Return the Code128 stop code
/// </summary>
/// <returns>the stop code</returns>
public static int StopCode()
{
return cSTOP;
}
/// <summary>
/// Indicates which code sets can represent a character -- CodeA, CodeB, or either
/// </summary>
public enum CodeSetAllowed
{
CodeA,
CodeB,
CodeAorB
}
}
}