Asp.net生成二维码和解析二维码源码

【实例截图】

【核心代码】

using System;
using System.Text;
using System.Drawing;
using ThoughtWorks.QRCode.Codec;
using ThoughtWorks.QRCode.Codec.Data;
using Winsteps.Validator;

public partial class Build : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            //客户端弹出验证消息框
            WinVal WinValInstance = new WinVal();
            WinValInstance.ValStyle = "toppoptip";
            WinValInstance.SetValidator();
        }
    }

    /// <summary>
    /// 生成二维码
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnBuild_Click(object sender, EventArgs e)
    {
        string con = PageOperate.GetNullToString(txtCon.Text.Trim());
        if (con == "")
        {
            PageOperate.AlertAndRedirect("请填写内容", "Build.aspx");
            return;
        }
        ImgCode.ImageUrl = "Handler.ashx?data="   Server.HtmlEncode(con)   "&len=4";
    }

    /// <summary>
    /// 上传二维码图
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnUpload_Click(object sender, EventArgs e)
    {
        try
        {
            string fileName = PageOperate.GetNullToString(fileUp.FileName.Trim());
            if (fileName == "")
            {
                PageOperate.AlertAndRedirect("请选择二维码图", "Build.aspx");
                return;
            }
            string ext = fileName.Substring(fileName.LastIndexOf(".")).ToLower();
            ViewState["name"] = DateTime.Now.ToString("yyyyMMddHHmmss")   ext;
            if (ext.Contains("jpg") || ext.Contains("gif") || ext.Contains("png") || ext.Contains("bmp"))
            {
                string dirName = Server.MapPath("~/FileUpload/")   ViewState["name"].ToString();
                fileUp.SaveAs(dirName);
                this.ImgUpCode.ImageUrl = "~/FileUpload/"   ViewState["name"].ToString();
            }
            else
                PageOperate.AlertAndRedirect("二维码图片格式不正确", "Build.aspx");
        }
        catch
        {
            PageOperate.AlertAndRedirect("上传出现异常！", "Build.aspx");
            return;
        }
    }

    /// <summary>
    /// 解析二维码图
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnAnalyse_Click(object sender, EventArgs e)
    {
        if (PageOperate.GetNullToString(ViewState["name"]) != "")
        {
            try
            {
                QRCodeDecoder qrc = new QRCodeDecoder();
                string fileName = Server.MapPath("~/FileUpload/")   PageOperate.GetNullToString(ViewState["name"]);
                string qrcStr = qrc.decode(new QRCodeBitmapImage(new Bitmap(fileName)), Encoding.UTF8);
                this.lblCon.Text = qrcStr;
            }
            catch
            {
                PageOperate.AlertAndRedirect("解析出现异常！", "Build.aspx");
                return;
            }
        }
        else
        {
            PageOperate.AlertAndRedirect("请上传二维码图！", "Build.aspx");
            return;
        }
    }
}