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ASP.NET
|| Published on :
Wednesday, January 27, 2016 || Views:
11402
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Create a QR Code with a Logo in ASP.Net C# Create a QR Code
Introduction
Here Pawan Kumar will explain how to Create a QR Code with a Logo in ASP.Net C#
Description
In previous post I have explained
Cascading dropdown in ASP.NET using JQuery Http Handler,
How to add current copyright year in ASP.NET,
How to avoid a form from double submission using asp.net,
Set max length of MultiLine TextBox in ASP.Net,
Allow only alphabets in a textbox using javascript in asp.net,
jQuery, ASP.NET - How to validate the file type and file size of File Upload control on file selection using the jQuery .Change() event, and many more articles.
Now I will explain How to Create a QR Code with a Logo in ASP.Net C#
So follow the steps to learn Create a QR Code with a Logo in ASP.Net C#
ASP.NET Page
<!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></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="URL" runat="server"></asp:TextBox>
<br /><br />
<asp:FileUpload ID="LogoUpload" runat="server" />
<br /><br />
<asp:Button ID="CreateCode" runat="server" Text="Create QR Code" OnClick="CreateCode_OnClick" />
<br /><br />
<asp:Image runat="server" ID="QRImage" />
</div>
</form>
</body>
</html>
ASP.NET Code Behind
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using MessagingToolkit.QRCode.Codec;
using MessagingToolkit.QRCode.Codec.Data;
using System.Drawing;
using System.Drawing.Imaging;
namespace CodeCreator
{
public partial class _default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void CreateCode_OnClick(object sender, EventArgs e)
{
string path = "c:\\code\\projects\\CodeCreator\\CodeCreator\\";
QRCodeEncoder encoder = new QRCodeEncoder();
encoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.H; // 30%
encoder.QRCodeScale = 10;
Bitmap img = encoder.Encode(URL.Text);
LogoUpload.SaveAs(path + LogoUpload.FileName);
System.Drawing.Image logo = System.Drawing.Image.FromFile(path + LogoUpload.FileName);
int left = (img.Width / 2) - (logo.Width / 2);
int top = (img.Height / 2) - (logo.Height / 2);
Graphics g = Graphics.FromImage(img);
g.DrawImage(logo, new Point(left, top));
img.Save(path + "img.jpg", ImageFormat.Jpeg);
QRImage.ImageUrl = "img.jpg";
}
}
}
Conclusion:
So, In this tutorial we have learned, Create a QR Code with a Logo in ASP.Net C#