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asp.net(C#)利用QRCode生成二维码

2016-12-29 00:00 555 查看

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="QRCode.aspx.cs" Inherits="QRCode" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>生成二维码</title>
</head>
<body>
<form id="form1" runat="server">
<div>
请输入内容：<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br/>
<asp:Button ID="Button1" runat="server" Text="生成二维码" onclick="Button1_Click" />
</div>
<div style="text-align:center">
<asp:Image ID="ImageCode" runat="server" Visible="false" />
</div>
</form>
</body>
</html>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class QRCode : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}

protected void Button1_Click(object sender, EventArgs e)
{
string CodeText = TextBox1.Text.Trim();
if (!string.IsNullOrEmpty(CodeText))
{
ImageCode.Visible = true;
ImageCode.ImageUrl = "GetQRCode.ashx?CodeText=" + CodeText;
}
}
}

<%@ WebHandler Language="C#" Class="GetQRCode" %>

using System;
using System.Web;

using ThoughtWorks.QRCode.Codec;
using ThoughtWorks.QRCode.Codec.Data;
using ThoughtWorks.QRCode.Codec.Util;
using System.IO;
using System.Text;

public class GetQRCode : IHttpHandler {

public void ProcessRequest (HttpContext context) {

String data = context.Request["CodeText"];
if (!string.IsNullOrEmpty(data))
{
QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
qrCodeEncoder.QRCodeScale = 4;
qrCodeEncoder.QRCodeVersion = 8;
qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
System.Drawing.Bitmap image = qrCodeEncoder.Encode(data);
System.IO.MemoryStream MStream = new System.IO.MemoryStream();
image.Save(MStream, System.Drawing.Imaging.ImageFormat.Png);
context.Response.ClearContent();
context.Response.ContentType = "image/Png";
context.Response.BinaryWrite(MStream.ToArray());
}

context.Response.Flush();
context.Response.End();
}

public bool IsReusable {
get {
return false;
}
}
}

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