<!DOCTYPE html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<headid="Head1" runat="server">
<title>aspdotnetcode.com : QR codegenerator in asp.net</title>
<meta name="viewport" content="width=device-width,initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<form id="form1" runat="server">
<div class="page-header">
<h1>QR code generator in asp.net</h1>
</div>
<div class="form-group">
<labelclass="control-labelcol-sm-2">Enter QR Text :</label>
<divclass="col-sm-10">
<asp:TextBox ID="txtCode" runat="server" class="form-control"></asp:TextBox>
</div>
</div>
<div class="form-group">
<labelclass="control-labelcol-sm-2"></label>
<divclass="col-sm-10">
<asp:Button ID="btnGenerate" runat="server" Text="Generate" OnClick="btnGenerate_Click" class="btn btn-primary" />
</div>
</div>
<hr />
<asp:PlaceHolder ID="plBarCode" runat="server" />
</form>
</div>
</body>
</html>
protected void btnGenerate_Click(object sender, EventArgs e)
{
string code = txtCode.Text;
QRCodeGenerator qrGenerator = newQRCodeGenerator();
QRCodeGenerator.QRCode qrCode = qrGenerator.CreateQrCode(code,QRCodeGenerator.ECCLevel.Q);
System.Web.UI.WebControls.Image imgBarCode = newSystem.Web.UI.WebControls.Image();
imgBarCode.Height = 350;
imgBarCode.Width = 350;
using (Bitmap bitMap =qrCode.GetGraphic(20))
{
using(MemoryStream ms = new MemoryStream())
{
bitMap.Save(ms,System.Drawing.Imaging.ImageFormat.Png);
byte[] byteImage = ms.ToArray();
imgBarCode.ImageUrl = "data:image/png;base64," + Convert.ToBase64String(byteImage);
}
plBarCode.Controls.Add(imgBarCode);
}
}