asp.net 生成条码、二维码（含上传并解析二维码）

【实例截图】

【核心代码】

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;
using System.Drawing.Imaging;
using ThoughtWorks.QRCode.Codec;
using ThoughtWorks.QRCode.Codec.Data;

public partial class Barcode1 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        TextBox1.Focus();
        TextBox1.Text = "";
        if (!IsPostBack)
        {
            for (int i = 1; i <= 40; i  )
            {
                DDLVer.Items.Add(i.ToString());
            }
            DDLVer.Text = "7";
        }
        Button_39_Click(new object(), new EventArgs());
        Button_EAN13_Click(new object(), new EventArgs());
    }

    protected void Button_39_Click(object sender, EventArgs e)
    {
        Literal_39.Text = BarCodeHelper.get39(TextBox_39.Text.Trim(), int.Parse(TextBox_39_w.Text.Trim()), int.Parse(TextBox_39_h.Text.Trim()));
        Image1.ImageUrl = "code128.aspx?num="   TextBox_39.Text.Trim();
    }

    protected void Button_EAN13_Click(object sender, EventArgs e)
    {
        Literal_EAN13.Text = BarCodeHelper.getEAN13(TextBox_EAN13.Text.Trim(), int.Parse(TextBox_EAN13_w.Text.Trim()), int.Parse(TextBox_EAN13_h.Text.Trim()));
    }

    /// <summary>
    /// 生成条码
    /// </summary>
    /// <param name="BarString">条码模式字符串</param>
    /// <param name="Height">生成的条码高度</param>
    /// <returns>条码图形</returns>
    public Bitmap KiCode128C(string BarString, int Height)
    {
        Bitmap b = new Bitmap(BarString.Length, Height, PixelFormat.Format24bppRgb);

        try
        {

            char[] cs = BarString.ToCharArray();

            for (int i = 0; i < cs.Length; i  )
            {
                for (int j = 0; j < Height; j  )
                {
                    if (cs[i] == 'b')
                    {
                        b.SetPixel(i, j, Color.Black);
                    }
                    else
                    {
                        b.SetPixel(i, j, Color.White);
                    }
                }
            }

            return b;
        }
        catch
        {
            return null;
        }
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        Image2.ImageUrl = "create2barcode.aspx?TxtQRCode="   Server.HtmlEncode(TxtQRCode.Text)   "&Txtsize="   Txtsize.Text   "&DDLEncode="   DDLEncode.Text   "&DDLJC="   DDLJC.Text   "&DDLVer="   DDLVer.Text;
    }

    protected void Button2_Click(object sender, EventArgs e)
    {
        string filename = FileUpload1.FileName;
        if (filename.Trim().Length <= 0)
        {
            return;
        }
        string ext = filename.Substring(filename.LastIndexOf(".")).ToLower();
        ViewState["filename"] = DateTime.Now.ToString("yyyyMMddHHmmss")   ext;
        if (ext.Contains("jpg") || ext.Contains("gif") || ext.Contains("png") || ext.Contains("bmp"))
        {
            string destname = Server.MapPath("~/UploadFile/")   ViewState["filename"].ToString();
            FileUpload1.SaveAs(destname);
            Image3.ImageUrl = "~/UploadFile/"   ViewState["filename"].ToString();
        }
    }

    protected void Button3_Click(object sender, EventArgs e)
    {
        if (ViewState["filename"] != null)
        {
            try
            {
                QRCodeDecoder decoder = new QRCodeDecoder();
                //QRCodeDecoder.Canvas = new ConsoleCanvas();
                String decodedString = decoder.decode(new QRCodeBitmapImage(new Bitmap(Server.MapPath("~/UploadFile/")   ViewState["filename"].ToString())));
                this.lbqrcode.Text = decodedString;
            }
            catch
            {

            }
        }
    }
}