分享一个二维码生成组件，简单到一句话就搞定

ThoughtWorks.QRCode 组件 另外还需要一个生成类 CreateQrcode

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using ThoughtWorks.QRCode.Codec;
using ThoughtWorks.QRCode.Codec.Data;
using System.Drawing;
using System.IO;
/// <summary>
/// CreateQrcode 的摘要说明
/// </summary>
public class CreateQrcode : System.Web.UI.Page
{
public CreateQrcode()
{
//
// TODO: 在此处添加构造函数逻辑
//
}

/// </summary>
/// <param name="strData">要生成的文字或者数字，支持中文。如： "4408810820 深圳－广州" 或者：4444444444</param>
/// <param name="qrEncoding">三种尺寸：BYTE ，ALPHA_NUMERIC，NUMERIC</param>
/// <param name="level">大小：L M Q H</param>
/// <param name="version">版本：如 8</param>
/// <param name="scale">比例：如 4</param>
/// <returns></returns>
public string CreateCode_Choose(string strData, string qrEncoding, string level, int version, int scale)
{
QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
string encoding = qrEncoding;
switch (encoding)
{
case "Byte":
qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
break;
case "AlphaNumeric":
qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.ALPHA_NUMERIC;
break;
case "Numeric":
qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.NUMERIC;
break;
default:
qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
break;
}

qrCodeEncoder.QRCodeScale = scale;
qrCodeEncoder.QRCodeVersion = version;
switch (level)
{
case "L":
qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L;
break;
case "M":
qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
break;
case "Q":
qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.Q;
break;
default:
qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.H;
break;
}
//文字生成图片
System.Drawing.Image image = qrCodeEncoder.Encode(strData);
string filename = DateTime.Now.ToString("yyyymmddhhmmssfff").ToString() + ".jpg";
string filepath = Server.MapPath(@"~\Qrcode") + "\\" + filename;
//如果文件夹不存在，则创建 不建议开启，需要对文件夹开启高权限，影响服务器安全
//if (!Directory.Exists(filepath))
// Directory.CreateDirectory(filepath);
System.IO.FileStream fs = new System.IO.FileStream(filepath, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write);
image.Save(fs, System.Drawing.Imaging.ImageFormat.Jpeg);
fs.Close();
image.Dispose();
return @"/Qrcode/" + filename;
}
}


页面调用代码

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using ThoughtWorks.QRCode.Codec;
using ThoughtWorks.QRCode.Codec.Data;
using System.Drawing;
using System.IO;
public partial class wxadmin_Qrcode : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Image1.ImageUrl = new CreateQrcode().CreateCode_Choose("http://www.jlbry.com", "BYTE", "L", 8, 4);


for (int i = 0; i < 10; i++)
{
Literal1.Text += "<img src=\"" + new CreateQrcode().CreateCode_Choose("http://www.jlbry.com", "BYTE", "L", 8, 4) + "\" /> <br/> welcome";

}
}


}