001.using System;
002.using System.Collections;
003.using System.ComponentModel;
004.using System.Data;
005.using System.Drawing;
006.using System.Drawing.Imaging;
007.using System.Web;
008.using System.Web.SessionState;
009.using System.Web.UI;
010.using System.Web.UI.WebControls;
011.using System.Web.UI.HtmlControls;
012.
013.namespace Barcodes
014.{
015.
016./// <summary />
017./// Summary description for BarCode.
018./// </summary />
019.
020.public class BarCode : System.Web.UI.Page
021.{
022. private void Page_Load(object sender, System.EventArgs e)
023. {
024.
025. string Code = Request["code"].ToString();
026.
027.
028. int w = Code.Length * 40;
029.
030.
031. Bitmap oBitmap = new Bitmap(w,100);
032.
033.
034. Graphics oGraphics = Graphics.FromImage(oBitmap);
035.
036.
037.
038. Font oFont = new Font("IDAutomationHC39M", 18);
039.
040.
041. PointF oPoint = new PointF(2f, 2f);
042. SolidBrush oBrushWrite = new SolidBrush(Color.Black);
043. SolidBrush oBrush = new SolidBrush(Color.White);
044.
045.
046.
047. oGraphics.FillRectangle(oBrush, 0, 0, w, 100);
048.
049.
050.
051. oGraphics.DrawString("*" + Code + "*", oFont, oBrushWrite, oPoint);
052.
053.
054. Response.ContentType = "image/jpeg" ;
055. oBitmap.Save (Response.OutputStream, ImageFormat.Jpeg);
056. }
057.}
058.}
059.
060.'===============================================================
061.
062.As you can see, there is a barcode with the value of 1234.
063.
064.Now, let’s create a page that has an asp:Image on it:
065.'==============================================================
066.<%@ Page language="c#" Codebehind="WebForm1.aspx.cs"
067. AutoEventWireup="false" Inherits="BarCodes.WebForm1" %>
068.<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
069.<HTML>
070. <HEAD>
071. <title>WebForm1</title>
072. <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
073. <meta name="CODE_LANGUAGE" Content="C#">
074. <meta name="vs_defaultClientScript" content="JavaScript">
075. <meta name="vs_targetSchema"
077. </HEAD>
078. <body MS_POSITIONING="GridLayout">
079. <form id="Form1" method="post" runat="server">
080. <asp:Image id="myBarCode" runat="server"></asp:Image>
081. </form>
082. </body>
083.'===========================================================
084.using System;
085.using System.Collections;
086.using System.ComponentModel;
087.using System.Data;
088.using System.Drawing;
089.using System.Web;
090.using System.Web.SessionState;
091.using System.Web.UI;
092.using System.Web.UI.WebControls;
093.using System.Web.UI.HtmlControls;
094.
095.namespace BarCodes
096.{
097. /// <summary />
098. /// Summary description for WebForm1.
099. /// </summary />
100. public class WebForm1 : System.Web.UI.Page
101. {
102. protected System.Web.UI.WebControls.Image myBarCode;
103.
104. private void Page_Load(object sender, System.EventArgs e)
105. {
106.
107. myBarCode.ImageUrl = "BarCode.aspx?code=31231";
108. }
109.
110. #region Web Form Designer generated code
111. override protected void OnInit(EventArgs e)
112. {
113.
114.
115.
116. InitializeComponent();
117. base.OnInit(e);
118. }
119.
120. /// <summary />
121. /// Required method for Designer support - do not modify
122. /// the contents of this method with the code editor.
123. /// </summary />
124. private void InitializeComponent()
125. {
126. this.Load += new System.EventHandler(this.Page_Load);
127.
128. }
129. #endregion
130. }
131.}
