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這篇文章主要介紹了asp.net(C#)生成Code39條形碼實例 條碼槍可以掃描出。需要的朋友可以過來參考下，希望對大家有所幫助

代碼如下:

using System;

using System.Collections;

using System.ComponentModel;

using System.Drawing;

using System.Data;

namespace MSCL

{

/// <summary>

/// 生成條碼Code39

/// </summary>

public class Code39

{

private Hashtable m_Code39 = new Hashtable();

private byte m_Magnify = 0;

/// <summary>

/// 放大倍數

/// </summary>

public byte Magnify { get { return m_Magnify; } set { m_Magnify = value; } }

private int m_Height = 40;

/// <summary>

/// 圖形高

/// </summary>

public int Height { get { return m_Height; } set { m_Height = value; } }

private Font m_ViewFont = null;

/// <summary>

/// 字體大小

/// </summary>

public Font ViewFont { get { return m_ViewFont; } set { m_ViewFont = value; } }

public Code39()

{

m_Code39.Add("A", "1101010010110");

m_Code39.Add("B", "1011010010110");

m_Code39.Add("C", "1101101001010");

m_Code39.Add("D", "1010110010110");

m_Code39.Add("E", "1101011001010");

m_Code39.Add("F", "1011011001010");

m_Code39.Add("G", "1010100110110");

m_Code39.Add("H", "1101010011010");

m_Code39.Add("I", "1011010011010");

m_Code39.Add("J", "1010110011010");

m_Code39.Add("K", "1101010100110");

m_Code39.Add("L", "1011010100110");

m_Code39.Add("M", "1101101010010");

m_Code39.Add("N", "1010110100110");

m_Code39.Add("O", "1101011010010");

m_Code39.Add("P", "1011011010010");

m_Code39.Add("Q", "1010101100110");

m_Code39.Add("R", "1101010110010");

m_Code39.Add("S", "1011010110010");

m_Code39.Add("T", "1010110110010");

m_Code39.Add("U", "1100101010110");

m_Code39.Add("V", "1001101010110");

m_Code39.Add("W", "1100110101010");

m_Code39.Add("X", "1001011010110");

m_Code39.Add("Y", "1100101101010");

m_Code39.Add("Z", "1001101101010");

m_Code39.Add("0", "1010011011010");

m_Code39.Add("1", "1101001010110");

m_Code39.Add("2", "1011001010110");

m_Code39.Add("3", "1101100101010");

m_Code39.Add("4", "1010011010110");

m_Code39.Add("5", "1101001101010");

m_Code39.Add("6", "1011001101010");

m_Code39.Add("7", "1010010110110");

m_Code39.Add("8", "1101001011010");

m_Code39.Add("9", "1011001011010");

m_Code39.Add("+", "1001010010010");

m_Code39.Add("-", "1001010110110");

m_Code39.Add("*", "1001011011010");

m_Code39.Add("/", "1001001010010");

m_Code39.Add("%", "1010010010010");

//m_Code39.Add("contentquot;, "1001001001010");

m_Code39.Add(".", "1100101011010");

m_Code39.Add(" ", "1001101011010");

}

public enum Code39Model

{

/// <summary>

/// 基本類別 1234567890ABC

/// </summary>

Code39Normal,

/// <summary>

/// 全ASCII方式 +A+B 來表示小寫

/// </summary>

Code39FullAscII

}

/// <summary>

/// 獲得條碼圖形

/// </summary>

/// <param name="p_Text">文字信息</param>

/// <param name="p_Model">類別</param>

/// <param name="p_StarChar">是否增加前后*號</param>

/// <returns>圖形</returns>

public Bitmap GetCodeImage(string p_Text, Code39Model p_Model, bool p_StarChar)

{

string _ValueText = "";

string _CodeText = "";

char[] _ValueChar = null;

switch (p_Model)

{

case Code39Model.Code39Normal:

_ValueText = p_Text.ToUpper();

break;

default:

_ValueChar = p_Text.ToCharArray();

for (int i = 0; i != _ValueChar.Length; i++)

{

if ((int)_ValueChar[i] >= 97 && (int)_ValueChar[i] <= 122)

{

_ValueText += "+" + _ValueChar[i].ToString().ToUpper();

}

else

{

_ValueText += _ValueChar[i].ToString();

}

}

break;

}

_ValueChar = _ValueText.ToCharArray();

if (p_StarChar == true) _CodeText += m_Code39["*"];

for (int i = 0; i != _ValueChar.Length; i++)

{

if (p_StarChar == true && _ValueChar[i] == '*') throw new Exception("帶有起始符號不能出現*");

object _CharCode = m_Code39[_ValueChar[i].ToString()];

if (_CharCode == null) throw new Exception("不可用的字符" + _ValueChar[i].ToString());

_CodeText += _CharCode.ToString();

}

if (p_StarChar == true) _CodeText += m_Code39["*"];

Bitmap _CodeBmp = GetImage(_CodeText);

GetViewImage(_CodeBmp, p_Text);

return _CodeBmp;

}

/// <summary>

/// 繪制編碼圖形

/// </summary>

/// <param name="p_Text">編碼</param>

/// <returns>圖形</returns>

private Bitmap GetImage(string p_Text)

{

char[] _Value = p_Text.ToCharArray();

//寬 == 需要繪制的數量*放大倍數 + 兩個字的寬

Bitmap _CodeImage = new Bitmap(_Value.Length * ((int)m_Magnify + 1), (int)m_Height);

Graphics _Garphics = Graphics.FromImage(_CodeImage);

_Garphics.FillRectangle(Brushes.White, new Rectangle(0, 0, _CodeImage.Width, _CodeImage.Height));

int _LenEx = 0;

for (int i = 0; i != _Value.Length; i++)

{

int _DrawWidth = m_Magnify + 1;

if (_Value[i] == '1')

{

_Garphics.FillRectangle(Brushes.Black, new Rectangle(_LenEx, 0, _DrawWidth, m_Height));

}

else

{

_Garphics.FillRectangle(Brushes.White, new Rectangle(_LenEx, 0, _DrawWidth, m_Height));

}

_LenEx += _DrawWidth;

}

_Garphics.Dispose();

return _CodeImage;

}

/// <summary>

/// 繪制文字

/// </summary>

/// <param name="p_CodeImage">圖形</param>

/// <param name="p_Text">文字</param>

private void GetViewImage(Bitmap p_CodeImage, string p_Text)

{

if (m_ViewFont == null) return;

Graphics _Graphics = Graphics.FromImage(p_CodeImage);

SizeF _FontSize = _Graphics.MeasureString(p_Text, m_ViewFont);

if (_FontSize.Width > p_CodeImage.Width || _FontSize.Height > p_CodeImage.Height - 20)

{

_Graphics.Dispose();

return;

}

int _StarHeight = p_CodeImage.Height - (int)_FontSize.Height;

_Graphics.FillRectangle(Brushes.White, new Rectangle(0, _StarHeight, p_CodeImage.Width, (int)_FontSize.Height));

int _StarWidth = (p_CodeImage.Width - (int)_FontSize.Width) / 2;

_Graphics.DrawString(p_Text, m_ViewFont, Brushes.Black, _StarWidth, _StarHeight);

_Graphics.Dispose();

}

}

}

代碼如下:

<%@ WebHandler Language="C#" Class="GetC39Handler" %>

using System;

using System.Web;

using System.IO;

using System.Drawing;

using System.Drawing.Imaging;

public class GetC39Handler : IHttpHandler {

//獲取Code39處理程序

public void ProcessRequest (HttpContext context) {

string OrderNo = context.Request.Params["OrderNo"];

MSCL.Code39 _Code39 = new MSCL.Code39();

_Code39.Height = 60;

_Code39.Magnify = 0;

_Code39.ViewFont = new Font("Arial", 12);

System.Drawing.Image _CodeImage = _Code39.GetCodeImage(OrderNo, MSCL.Code39.Code39Model.Code39Normal, true);

System.IO.MemoryStream _Stream = new System.IO.MemoryStream();

_CodeImage.Save(_Stream, System.Drawing.Imaging.ImageFormat.Jpeg);

//_CodeImage.Save(Server.MapPath("/1.jpeg"));

//_CodeImage.Save(Server.MapPath("/1.BMP"));

//_CodeImage.Save(Server.MapPath("/1.GIF"));

context.Response.ContentType = "image/tiff";

context.Response.Clear();

context.Response.BufferOutput = true;

context.Response.BinaryWrite(_Stream.GetBuffer());

context.Response.Flush();

}

public bool IsReusable {

get {

return false;

}

}

}

代碼如下:

//調用顯示訂單條碼

Image1.ImageUrl = "GetC39Handler.ashx?OrderNo=32134411";

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