asp.net 生成二维码 示例源码

可生成任意信息的二维码
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using QuickMark;using System.IO;using System.Drawing.Imaging;using System.Runtime.InteropServices;using ThoughtWorks.QRCode.Codec;using ThoughtWorks.QRCode.Codec.Data;using ThoughtWorks.QRCode.Codec.Util;using System.Drawing;using System.Text;using System.Net;namespace QRCode{ public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { string str = TextBox1.Text; string path = System.Web.HttpContext.Current.Server.MapPath("images"); string file = path "\\code.png"; if (ToQRCode(str, file)) { Image1.ImageUrl = "images/code.png"; Label1.Text = "生成成功"; } else Label1.Text = "生成失败"; } private bool ToQRCode(string str, string filename) { QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(); qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE; qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M; qrCodeEncoder.QRCodeVersion = 7; qrCodeEncoder.QRCodeScale = 4; //生成图像 Bitmap image = qrCodeEncoder.Encode(str, Encoding.Default); //将image保存到filename image.Save(filename); return true; } }}